1192886Sedwin# This file is in the public domain, so clarified as of 2192886Sedwin# 2009-05-17 by Arthur David Olson. 3153761Swollman 42742Swollman# also includes Central America and the Caribbean 52742Swollman 6273718Sedwin# This file is by no means authoritative; if you think you know better, 72742Swollman# go ahead and edit the file (and please send any changes to 8273718Sedwin# tz@iana.org for general use in the future). For more, please see 9273718Sedwin# the file CONTRIBUTING in the tz distribution. 102742Swollman 11149514Swollman# From Paul Eggert (1999-03-22): 122742Swollman# A reliable and entertaining source about time zones is 1358787Sru# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 142742Swollman 152742Swollman############################################################################### 162742Swollman 172742Swollman# United States 182742Swollman 1958787Sru# From Paul Eggert (1999-03-31): 2058787Sru# Howse writes (pp 121-125) that time zones were invented by 2158787Sru# Professor Charles Ferdinand Dowd (1825-1904), 2258787Sru# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 23257681Sedwin# His pamphlet "A System of National Time for Railroads" (1870) 2458787Sru# was the result of his proposals at the Convention of Railroad Trunk Lines 2558787Sru# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 2658787Sru# but in 1872-05 he moved the proposed origin to Greenwich. 2758787Sru 28309583Sglebius# From Paul Eggert (2016-09-21): 29309583Sglebius# Dowd's proposal left many details unresolved, such as where to draw 30309583Sglebius# lines between time zones. The key individual who made time zones 31309583Sglebius# work in the US was William Frederick Allen - railway engineer, 32309583Sglebius# managing editor of the Travelers' Guide, and secretary of the 33309583Sglebius# General Time Convention, a railway standardization group. Allen 34309583Sglebius# spent months in dialogs with scientific and railway leaders, 35309583Sglebius# developed a workable plan to institute time zones, and presented it 36309583Sglebius# to the General Time Convention on 1883-04-11, saying that his plan 37309583Sglebius# meant "local time would be practically abolished" - a plus for 38309583Sglebius# railway scheduling. By the next convention on 1883-10-11 nearly all 39309583Sglebius# railroads had agreed and it took effect on 1883-11-18 at 12:00. 40309583Sglebius# That Sunday was called the "day of two noons", as the eastern parts 41309583Sglebius# of the new zones observed noon twice. Allen witnessed the 42309583Sglebius# transition in New York City, writing: 43309583Sglebius# 44309583Sglebius# I heard the bells of St. Paul's strike on the old time. Four 45309583Sglebius# minutes later, obedient to the electrical signal from the Naval 46309583Sglebius# Observatory ... the time-ball made its rapid descent, the chimes 47309583Sglebius# of old Trinity rang twelve measured strokes, and local time was 48309583Sglebius# abandoned, probably forever. 49309583Sglebius# 50309583Sglebius# Most of the US soon followed suit. See: 51309583Sglebius# Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56. 52309583Sglebius# http://dx.doi.org/10.2307/3105430 53309583Sglebius 54149514Swollman# From Paul Eggert (2005-04-16): 55149514Swollman# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 56149514Swollman# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 57149514Swollman 58158421Swollman# From Paul Eggert (2006-03-22): 5914343Swollman# A good source for time zone historical data in the US is 6014343Swollman# Thomas G. Shanks, The American Atlas (5th edition), 6114343Swollman# San Diego: ACS Publications, Inc. (1991). 6214343Swollman# Make sure you have the errata sheet; the book is somewhat useless without it. 63158421Swollman# It is the source for most of the pre-1991 US entries below. 6414343Swollman 6575267Swollman# From Paul Eggert (2001-03-06): 6617200Swollman# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 67257681Sedwin# in his whimsical essay "An Economical Project for Diminishing the Cost 68257681Sedwin# of Light" published in the Journal de Paris (1784-04-26). 6917200Swollman# Not everyone is happy with the results: 7017200Swollman# 7117200Swollman# I don't really care how time is reckoned so long as there is some 7217200Swollman# agreement about it, but I object to being told that I am saving 7317200Swollman# daylight when my reason tells me that I am doing nothing of the kind. 7417200Swollman# I even object to the implication that I am wasting something 7517200Swollman# valuable if I stay in bed after the sun has risen. As an admirer 7617200Swollman# of moonlight I resent the bossy insistence of those who want to 7717200Swollman# reduce my time for enjoying it. At the back of the Daylight Saving 7817200Swollman# scheme I detect the bony, blue-fingered hand of Puritanism, eager 7917200Swollman# to push people into bed earlier, and get them up earlier, to make 8017200Swollman# them healthy, wealthy and wise in spite of themselves. 8117200Swollman# 82270728Spluknet# -- Robertson Davies, The diary of Samuel Marchbanks, 83149514Swollman# Clarke, Irwin (1947), XIX, Sunday 8475267Swollman# 8575267Swollman# For more about the first ten years of DST in the United States, see 86270728Spluknet# Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint 87273718Sedwin# (Carnegie Library of Pittsburgh, 1927). 88273718Sedwin# http://www.clpgh.org/exhibit/dst.html 8975267Swollman# 9075267Swollman# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 9175267Swollman# However, DST was imposed by the Standard Time Act of 1918, which 9275267Swollman# was the first nationwide legal time standard, and apparently 9375267Swollman# time was just called "Standard Time" or "Daylight Saving Time". 9417200Swollman 952742Swollman# From Arthur David Olson: 962742Swollman# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 9719878Swollman# See, for example, the front page of the Saturday, 1974-10-26 9819878Swollman# and Sunday, 1974-10-27 editions of the Washington Post. 992742Swollman 1002742Swollman# From Arthur David Olson: 1012742Swollman# Before the Uniform Time Act of 1966 took effect in 1967, observance of 1022742Swollman# Daylight Saving Time in the US was by local option, except during wartime. 1032742Swollman 10467578Swollman# From Arthur David Olson (2000-09-25): 10567578Swollman# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 10667578Swollman# In the introduction, Oboler spoke of "Eastern Peace Time." 107273718Sedwin# An AltaVista search turned up: 108325324Sgordon# https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html 10967578Swollman# "When the time is announced over the radio now, it is 'Eastern Peace 11067578Swollman# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 111270728Spluknet# (August 1945) by way of confirmation. 112325324Sgordon# 113325324Sgordon# From Paul Eggert (2017-09-23): 114325324Sgordon# This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter. 11567578Swollman 116149514Swollman# From Joseph Gallant citing 11767578Swollman# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 11867578Swollman# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 11986222Swollman# to switch to London for Attlee's address, but the American people 12067578Swollman# never got to hear his speech live. According to one press account, 12167578Swollman# CBS' Bob Trout was first to announce the word of Japan's surrender, 12267578Swollman# but a few seconds later, NBC, ABC and Mutual also flashed the word 12367578Swollman# of surrender, all of whom interrupting the bells of Big Ben in 12486222Swollman# London which were to precede Mr. Attlee's speech. 12567578Swollman 126114173Swollman# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 127114173Swollman# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 128114173Swollman# 129114173Swollman# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 130114173Swollman# Any announcement from Asia would reach St. John's New York newsroom on a 131114173Swollman# wire service teletype machine, which had prescribed signals for major news. 132114173Swollman# Associated Press, for example, would ring five bells before spewing out 133114173Swollman# typed copy of an important story, and 10 bells for news "of transcendental 134114173Swollman# importance." 135114173Swollman# 136114173Swollman# On Aug. 14, stalling while talking steadily into the NBC networks' open 137114173Swollman# microphone, St. John heard five bells and waited only to hear a sixth bell, 138114173Swollman# before announcing confidently: "Ladies and gentlemen, World War II is over. 139114173Swollman# The Japanese have agreed to our surrender terms." 140114173Swollman# 141114173Swollman# He had scored a 20-second scoop on other broadcasters. 142114173Swollman 143149590Swollman# From Arthur David Olson (2005-08-22): 144149590Swollman# Paul has been careful to use the "US" rules only in those locations 145149590Swollman# that are part of the United States; this reflects the real scope of 146149590Swollman# U.S. government action. So even though the "US" rules have changed 147149590Swollman# in the latest release, other countries won't be affected. 148149590Swollman 1492742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 15075267SwollmanRule US 1918 1919 - Mar lastSun 2:00 1:00 D 1512742SwollmanRule US 1918 1919 - Oct lastSun 2:00 0 S 1522742SwollmanRule US 1942 only - Feb 9 2:00 1:00 W # War 15367578SwollmanRule US 1945 only - Aug 14 23:00u 1:00 P # Peace 154279706SedwinRule US 1945 only - Sep lastSun 2:00 0 S 155149514SwollmanRule US 1967 2006 - Oct lastSun 2:00 0 S 1562742SwollmanRule US 1967 1973 - Apr lastSun 2:00 1:00 D 1572742SwollmanRule US 1974 only - Jan 6 2:00 1:00 D 1582742SwollmanRule US 1975 only - Feb 23 2:00 1:00 D 1592742SwollmanRule US 1976 1986 - Apr lastSun 2:00 1:00 D 160149514SwollmanRule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 161149514SwollmanRule US 2007 max - Mar Sun>=8 2:00 1:00 D 162149514SwollmanRule US 2007 max - Nov Sun>=1 2:00 0 S 1632742Swollman 164153761Swollman# From Arthur David Olson, 2005-12-19 165153761Swollman# We generate the files specified below to guard against old files with 166153761Swollman# obsolete information being left in the time zone binary directory. 167153761Swollman# We limit the list to names that have appeared in previous versions of 168153761Swollman# this time zone package. 169153761Swollman# We do these as separate Zones rather than as Links to avoid problems if 170153761Swollman# a particular place changes whether it observes DST. 171153761Swollman# We put these specifications here in the northamerica file both to 172153761Swollman# increase the chances that they'll actually get compiled and to 173153761Swollman# avoid the need to duplicate the US rules in another file. 174153761Swollman 175153761Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 176153761SwollmanZone EST -5:00 - EST 177153761SwollmanZone MST -7:00 - MST 178153761SwollmanZone HST -10:00 - HST 179153761SwollmanZone EST5EDT -5:00 US E%sT 180153761SwollmanZone CST6CDT -6:00 US C%sT 181153761SwollmanZone MST7MDT -7:00 US M%sT 182153761SwollmanZone PST8PDT -8:00 US P%sT 183153761Swollman 18419878Swollman# From U. S. Naval Observatory (1989-01-19): 1852742Swollman# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 1862742Swollman# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 1872742Swollman# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 1882742Swollman# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 1892742Swollman# USA MOUNTAIN 7 H BEHIND UTC DENVER 1902742Swollman# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 1912742Swollman# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 1922742Swollman# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 1932742Swollman# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 1942742Swollman# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 1952742Swollman# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 196270728Spluknet# USA " 9 H BEHIND UTC APR 3 - OCT 30 1972742Swollman# USA HAWAII 10 H BEHIND UTC 1982742Swollman# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 1992742Swollman 20019878Swollman# From Arthur David Olson (1989-01-21): 2012742Swollman# The above dates are for 1988. 2022742Swollman# Note the "AKST" and "AKDT" abbreviations, the claim that there's 2032742Swollman# no DST in Samoa, and the claim that there is DST in Alaska and the 2042742Swollman# Aleutians. 2052742Swollman 20619878Swollman# From Arthur David Olson (1988-02-13): 2072742Swollman# Legal standard time zone names, from United States Code (1982 Edition and 2082742Swollman# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 20919878Swollman# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 2102742Swollman# took effect), as explained in sections 263 and 261: 2112742Swollman# (none) 2122742Swollman# United States standard eastern time 2132742Swollman# United States standard mountain time 2142742Swollman# United States standard central time 2152742Swollman# United States standard Pacific time 2162742Swollman# (none) 2172742Swollman# United States standard Alaska time 2182742Swollman# (none) 21919878Swollman# Next, names from 1967-04-01 until 1983-11-30 (the date for 2202742Swollman# public law 98-181): 2212742Swollman# Atlantic standard time 2222742Swollman# eastern standard time 2232742Swollman# central standard time 2242742Swollman# mountain standard time 2252742Swollman# Pacific standard time 2262742Swollman# Yukon standard time 2272742Swollman# Alaska-Hawaii standard time 2282742Swollman# Bering standard time 22919878Swollman# And after 1983-11-30: 2302742Swollman# Atlantic standard time 2312742Swollman# eastern standard time 2322742Swollman# central standard time 2332742Swollman# mountain standard time 2342742Swollman# Pacific standard time 2352742Swollman# Alaska standard time 2362742Swollman# Hawaii-Aleutian standard time 2372742Swollman# Samoa standard time 2382742Swollman# The law doesn't give abbreviations. 23914343Swollman# 240325324Sgordon# From Paul Eggert (2016-12-19): 241325324Sgordon# Here are URLs for the 1918 and 1966 legislation: 242325324Sgordon# http://uscode.house.gov/statviewer.htm?volume=40&page=451 243325324Sgordon# http://uscode.house.gov/statviewer.htm?volume=80&page=108 244325324Sgordon# Although the 1918 names were officially "United States Standard 245325324Sgordon# Eastern Time" and similarly for "Central", "Mountain", "Pacific", 246325324Sgordon# and "Alaska", in practice "Standard" was placed just before "Time", 247325324Sgordon# as codified in 1966. In practice, Alaska time was abbreviated "AST" 248325324Sgordon# before 1968. Summarizing the 1967 name changes: 249325324Sgordon# 1918 names 1967 names 250325324Sgordon# -08 Standard Pacific Time (PST) Pacific standard time (PST) 251325324Sgordon# -09 (unofficial) Yukon (YST) Yukon standard time (YST) 252325324Sgordon# -10 Standard Alaska Time (AST) Alaska-Hawaii standard time (AHST) 253325324Sgordon# -11 (unofficial) Nome (NST) Bering standard time (BST) 254325324Sgordon# 25575267Swollman# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 256283079Sedwin# Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time" 257283079Sedwin# for time in Guam and the Northern Marianas. See the file "australasia". 258283079Sedwin# 259283079Sedwin# From Paul Eggert (2015-04-17): 260283079Sedwin# HST and HDT are standardized abbreviations for Hawaii-Aleutian 261283079Sedwin# standard and daylight times. See section 9.47 (p 234) of the 262283079Sedwin# U.S. Government Printing Office Style Manual (2008) 263325324Sgordon# https://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf 264158421Swollman 265149514Swollman# From Arthur David Olson, 2005-08-09 266149514Swollman# The following was signed into law on 2005-08-08. 267149514Swollman# 268149514Swollman# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 269270728Spluknet# (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 270149514Swollman# U.S.C. 260a(a)) is amended-- 271270728Spluknet# (1) by striking "first Sunday of April" and inserting "second 272270728Spluknet# Sunday of March"; and 273270728Spluknet# (2) by striking "last Sunday of October" and inserting "first 274149514Swollman# Sunday of November'. 275270728Spluknet# (b) Effective Date.--Subsection (a) shall take effect 1 year after the 276149514Swollman# date of enactment of this Act or March 1, 2007, whichever is later. 277270728Spluknet# (c) Report to Congress.--Not later than 9 months after the effective 278149514Swollman# date stated in subsection (b), the Secretary shall report to Congress 279149514Swollman# on the impact of this section on energy consumption in the United 280149514Swollman# States. 281270728Spluknet# (d) Right to Revert.--Congress retains the right to revert the 282149514Swollman# Daylight Saving Time back to the 2005 time schedules once the 283149514Swollman# Department study is complete. 2842742Swollman 28586222Swollman# US eastern time, represented by New York 28675267Swollman 28767578Swollman# Connecticut, Delaware, District of Columbia, most of Florida, 288149590Swollman# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 289149590Swollman# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 290114173Swollman# New Hampshire, New Jersey, New York, North Carolina, Ohio, 291114173Swollman# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 292114173Swollman# Vermont, Virginia, West Virginia 29367578Swollman 294149514Swollman# From Dave Cantor (2004-11-02): 295149514Swollman# Early this summer I had the occasion to visit the Mount Washington 296149514Swollman# Observatory weather station atop (of course!) Mount Washington [, NH].... 297149514Swollman# One of the staff members said that the station was on Eastern Standard Time 298149514Swollman# and didn't change their clocks for Daylight Saving ... so that their 299149514Swollman# reports will always have times which are 5 hours behind UTC. 300149514Swollman 301153670Swollman# From Paul Eggert (2005-08-26): 302153670Swollman# According to today's Huntsville Times 303273718Sedwin# http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 304153670Swollman# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 305153670Swollman# in Russell County, Lanett in Chambers County and some towns in Lee County, 306153670Swollman# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 307153670Swollman# Roberts, city administrator in Phenix City. as saying "We are in the Central 308153670Swollman# time zone, but we do go by the Eastern time zone because so many people work 309158421Swollman# in Columbus." 310325324Sgordon# 311325324Sgordon# From Paul Eggert (2017-02-22): 312325324Sgordon# Four cities are involved. The two not mentioned above are Smiths Station 313325324Sgordon# and Valley. Barbara Brooks, Valley's assistant treasurer, heard it started 314325324Sgordon# because West Point Pepperell textile mills were in Alabama while the 315325324Sgordon# corporate office was in Georgia, and residents voted to keep Eastern 316325324Sgordon# time even after the mills closed. See: Kazek K. Did you know which 317325324Sgordon# Alabama towns are in a different time zone? al.com 2017-02-06. 318325324Sgordon# http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html 319153670Swollman 320273718Sedwin# From Paul Eggert (2014-09-06): 321273718Sedwin# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 322273718Sedwin# says that New York City Hall time was 3 minutes 58.4 seconds fast of 323273718Sedwin# Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the 324273718Sedwin# nearest second. 325273718Sedwin 32614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 32714343SwollmanRule NYC 1920 only - Mar lastSun 2:00 1:00 D 32814343SwollmanRule NYC 1920 only - Oct lastSun 2:00 0 S 32914343SwollmanRule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 33014343SwollmanRule NYC 1921 1954 - Sep lastSun 2:00 0 S 33114343SwollmanRule NYC 1955 1966 - Oct lastSun 2:00 0 S 33214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 333149514SwollmanZone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 33414343Swollman -5:00 US E%sT 1920 33514343Swollman -5:00 NYC E%sT 1942 33614343Swollman -5:00 US E%sT 1946 33714343Swollman -5:00 NYC E%sT 1967 33814343Swollman -5:00 US E%sT 3392742Swollman 34086222Swollman# US central time, represented by Chicago 34167578Swollman 342136638Swollman# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 343136638Swollman# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 344136638Swollman# Washington counties), Illinois, western Indiana 345114173Swollman# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 346114173Swollman# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 347114173Swollman# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 348114173Swollman# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 349114173Swollman# western Tennessee, most of Texas, Wisconsin 35067578Swollman 351158421Swollman# From Larry M. Smith (2006-04-26) re Wisconsin: 352325324Sgordon# https://docs.legis.wisconsin.gov/statutes/statutes/175.pdf 353158421Swollman# is currently enforced at the 01:00 time of change. Because the local 354158421Swollman# "bar time" in the state corresponds to 02:00, a number of citations 355158421Swollman# are issued for the "sale of class 'B' alcohol after prohibited 356158421Swollman# hours" within the deviated hour of this change every year.... 357169811Swollman# 358169811Swollman# From Douglas R. Bomberg (2007-03-12): 359169811Swollman# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 360169811Swollman# Statue 175 closer in synch with the US Congress' intent.... 361325324Sgordon# https://docs.legis.wisconsin.gov/2007/related/acts/3 362158421Swollman 363309583Sglebius# From an email administrator of the City of Fort Pierre, SD (2015-12-21): 364309583Sglebius# Fort Pierre is technically located in the Mountain time zone as is 365309583Sglebius# the rest of Stanley County. Most of Stanley County and Fort Pierre 366309583Sglebius# uses the Central time zone due to doing most of their business in 367309583Sglebius# Pierre so it simplifies schedules. I have lived in Stanley County 368309583Sglebius# all my life and it has been that way since I can remember. (43 years!) 369309583Sglebius# 370309583Sglebius# From Paul Eggert (2015-12-25): 371309583Sglebius# Assume this practice predates 1970, so Fort Pierre can use America/Chicago. 372309583Sglebius 37314343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 37414343SwollmanRule Chicago 1920 only - Jun 13 2:00 1:00 D 37514343SwollmanRule Chicago 1920 1921 - Oct lastSun 2:00 0 S 37614343SwollmanRule Chicago 1921 only - Mar lastSun 2:00 1:00 D 37714343SwollmanRule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 37814343SwollmanRule Chicago 1922 1954 - Sep lastSun 2:00 0 S 37914343SwollmanRule Chicago 1955 1966 - Oct lastSun 2:00 0 S 38014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 381149514SwollmanZone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 38214343Swollman -6:00 US C%sT 1920 383273718Sedwin -6:00 Chicago C%sT 1936 Mar 1 2:00 384273718Sedwin -5:00 - EST 1936 Nov 15 2:00 38514343Swollman -6:00 Chicago C%sT 1942 38614343Swollman -6:00 US C%sT 1946 38714343Swollman -6:00 Chicago C%sT 1967 38814343Swollman -6:00 US C%sT 38986222Swollman# Oliver County, ND switched from mountain to central time on 1992-10-25. 390149514SwollmanZone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 391273718Sedwin -7:00 US M%sT 1992 Oct 25 2:00 39286222Swollman -6:00 US C%sT 393158421Swollman# Morton County, ND, switched from mountain to central time on 394158421Swollman# 2003-10-26, except for the area around Mandan which was already central time. 395158421Swollman# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 396158421Swollman# Officially this switch also included part of Sioux County, and 397158421Swollman# Jones, Mellette, and Todd Counties in South Dakota; 398158421Swollman# but in practice these other counties were already observing central time. 399158421Swollman# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 400273718SedwinZone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 401273718Sedwin -7:00 US M%sT 2003 Oct 26 2:00 402158421Swollman -6:00 US C%sT 4032742Swollman 404219149Sedwin# From Josh Findley (2011-01-21): 405219149Sedwin# ...it appears that Mercer County, North Dakota, changed from the 406219149Sedwin# mountain time zone to the central time zone at the last transition from 407219149Sedwin# daylight-saving to standard time (on Nov. 7, 2010): 408325324Sgordon# https://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 409219149Sedwin# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 410219149Sedwin 411219149Sedwin# From Andy Lipscomb (2011-01-24): 412219149Sedwin# ...according to the Census Bureau, the largest city is Beulah (although 413219149Sedwin# it's commonly referred to as Beulah-Hazen, with Hazen being the next 414219149Sedwin# largest city in Mercer County). Google Maps places Beulah's city hall 415270728Spluknet# at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset 416270728Spluknet# of 6h47'07". 417219149Sedwin 418273718SedwinZone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 419273718Sedwin -7:00 US M%sT 2010 Nov 7 2:00 420219149Sedwin -6:00 US C%sT 421219149Sedwin 42286222Swollman# US mountain time, represented by Denver 42367578Swollman# 424136638Swollman# Colorado, far western Kansas, Montana, western 42586222Swollman# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 426171948Sedwin# New Mexico, southwestern North Dakota, 42775267Swollman# western South Dakota, far western Texas (El Paso County, Hudspeth County, 42875267Swollman# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 42967578Swollman# 43014343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 43114343SwollmanRule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 43214343SwollmanRule Denver 1920 only - Oct lastSun 2:00 0 S 43314343SwollmanRule Denver 1921 only - May 22 2:00 0 S 43414343SwollmanRule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 43514343SwollmanRule Denver 1965 1966 - Oct lastSun 2:00 0 S 4362742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 437149514SwollmanZone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 43815309Swollman -7:00 US M%sT 1920 43915309Swollman -7:00 Denver M%sT 1942 44015309Swollman -7:00 US M%sT 1946 44115309Swollman -7:00 Denver M%sT 1967 44215309Swollman -7:00 US M%sT 4432742Swollman 44414343Swollman# US Pacific time, represented by Los Angeles 44567578Swollman# 446136638Swollman# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 447263041Sedwin# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 448263041Sedwin# north of the Salmon River, and the towns of Burgdorf and Warren), 449263041Sedwin# Nevada (except West Wendover), Oregon (except the northern 3/4 of 450263041Sedwin# Malheur county), and Washington 451309583Sglebius 452309583Sglebius# From Paul Eggert (2016-08-20): 453309583Sglebius# In early February 1948, in response to California's electricity shortage, 454309583Sglebius# PG&E changed power frequency from 60 to 59.5 Hz during daylight hours, 455309583Sglebius# causing electric clocks to lose six minutes per day. (This did not change 456309583Sglebius# legal time, and is not part of the data here.) See: 457309583Sglebius# Ross SA. An energy crisis from the past: Northern California in 1948. 458309583Sglebius# Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, 459325324Sgordon# 1973-11. https://escholarship.org/uc/item/8x22k30c 46067578Swollman# 461309583Sglebius# In another measure to save electricity, DST was instituted from 1948-03-14 462309583Sglebius# at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move 463309583Sglebius# the fallback transition earlier. See pages 3-4 of: 464309583Sglebius# http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf 465309583Sglebius# 466309583Sglebius# In response: 467309583Sglebius# 468309583Sglebius# Governor Warren received a torrent of objecting mail, and it is not too much 469309583Sglebius# to speculate that the objections to Daylight Saving Time were one important 470309583Sglebius# factor in the defeat of the Dewey-Warren Presidential ticket in California. 471309583Sglebius# -- Ross, p 25 472309583Sglebius# 473309583Sglebius# On December 8 the governor exercised the option, setting the date to January 1 474309583Sglebius# (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01). 475309583Sglebius# 476309583Sglebius# Despite the controversy, in 1949 California voters approved Proposition 12, 477309583Sglebius# which established DST from April's last Sunday at 01:00 until September's 478309583Sglebius# last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed 479309583Sglebius# the fall-back date to October's last Sunday. See: 480325324Sgordon# https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props 481325324Sgordon# https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props 482309583Sglebius# 48314343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 484309583SglebiusRule CA 1948 only - Mar 14 2:01 1:00 D 48514343SwollmanRule CA 1949 only - Jan 1 2:00 0 S 486309583SglebiusRule CA 1950 1966 - Apr lastSun 1:00 1:00 D 48714343SwollmanRule CA 1950 1961 - Sep lastSun 2:00 0 S 48814343SwollmanRule CA 1962 1966 - Oct lastSun 2:00 0 S 48914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 490149514SwollmanZone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 49114343Swollman -8:00 US P%sT 1946 49214343Swollman -8:00 CA P%sT 1967 49314343Swollman -8:00 US P%sT 4948029Swollman 49514343Swollman# Alaska 496325324Sgordon# AK%sT is the modern abbreviation for -09 per USNO. 49714343Swollman# 498325324Sgordon# From Paul Eggert (2017-06-15): 49914343Swollman# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 50019878Swollman# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 501325324Sgordon# On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the 502325324Sgordon# Russian forts and fleet at Sitka fired salutes to mark the ceremony of 503325324Sgordon# formal transfer. See the Sacramento Daily Union (1867-11-14), p 3, col 2. 504325324Sgordon# https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1 505325324Sgordon# Sitka workers did not change their calendars until Sunday, 1867-10-20, 506325324Sgordon# and so celebrated two Sundays that week. See: Ahllund T (tr Hallamaa P). 507325324Sgordon# From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25. 508325324Sgordon# http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf 509325324Sgordon# Include only the time zone part of this transition, ignoring the switch 510325324Sgordon# from Julian to Gregorian, since we can't represent the Julian calendar. 51114343Swollman# 512325324Sgordon# As far as we know, of the locations mentioned below only Sitka was 51386222Swollman# permanently inhabited in 1867 by anyone using either calendar. 514325324Sgordon# (Yakutat was colonized by the Russians in 1799, but the settlement was 515325324Sgordon# destroyed in 1805 by a Yakutat-kon war party.) Many of Alaska's inhabitants 516325324Sgordon# were unaware of the US acquisition of Alaska, much less of any calendar or 517325324Sgordon# time change. However, the Russian-influenced part of Alaska did observe 518325324Sgordon# Russian time, and it is more accurate to model this than to ignore it. 519325324Sgordon# The database format requires an exact transition time; use the Russian 520325324Sgordon# salute as a somewhat-arbitrary time for the formal transfer of control for 521325324Sgordon# all of Alaska. Sitka's UTC offset is -9:01:13; adjust its 15:30 to the 522325324Sgordon# local times of other Alaskan locations so that they change simultaneously. 523219411Sedwin 524270728Spluknet# From Paul Eggert (2014-07-18): 525270728Spluknet# One opinion of the early-1980s turmoil in Alaska over time zones and 526270728Spluknet# daylight saving time appeared as graffiti on a Juneau airport wall: 527270728Spluknet# "Welcome to Juneau. Please turn your watch back to the 19th century." 528270728Spluknet# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. 529270728Spluknet# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html 530219411Sedwin# 531270728Spluknet# Steve Ferguson (2011-01-31) referred to the following source: 532270728Spluknet# Norris F. Keeping time in Alaska: national directives, local response. 533270728Spluknet# Alaska History 2001;16(1-2). 534270728Spluknet# http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ 535219411Sedwin 536219411Sedwin# From Arthur David Olson (2011-02-01): 537219411Sedwin# Here's database-relevant material from the 2001 "Alaska History" article: 538219411Sedwin# 539219411Sedwin# On September 20 [1979]...DOT...officials decreed that on April 27, 540219411Sedwin# 1980, Juneau and other nearby communities would move to Yukon Time. 541219411Sedwin# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 542219411Sedwin# Pacific Time. 543219411Sedwin# 544219411Sedwin# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 545219411Sedwin# Department's September 1979 decision. Juneau and other communities in 546219411Sedwin# northern Southeast reverted to Pacific Time on October 26. 547219411Sedwin# 548219411Sedwin# On October 28 [1983]...the Metlakatla Indian Community Council voted 549219411Sedwin# unanimously to keep the reservation on Pacific Time. 550219411Sedwin# 551219411Sedwin# According to DOT official Joanne Petrie, Indian reservations are not 552219411Sedwin# bound to follow time zones imposed by neighboring jurisdictions. 553219411Sedwin# 554219411Sedwin# (The last is consistent with how the database now handles the Navajo 555219411Sedwin# Nation.) 556219411Sedwin 557219411Sedwin# From Arthur David Olson (2011-02-09): 558219411Sedwin# I just spoke by phone with a staff member at the Metlakatla Indian 559219411Sedwin# Community office (using contact information available at 560219411Sedwin# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 561219411Sedwin# It's shortly after 1:00 here on the east coast of the United States; 562219411Sedwin# the staffer said it was shortly after 10:00 there. When I asked whether 563270728Spluknet# that meant they were on Pacific time, they said no - they were on their 564219411Sedwin# own time. I asked about daylight saving; they said it wasn't used. I 565219411Sedwin# did not inquire about practices in the past. 566219411Sedwin 567226289Sedwin# From Arthur David Olson (2011-08-17): 568226289Sedwin# For lack of better information, assume that Metlakatla's 569226289Sedwin# abandonment of use of daylight saving resulted from the 1983 vote. 570226289Sedwin 571309583Sglebius# From Steffen Thorsen (2015-11-09): 572309583Sglebius# It seems Metlakatla did go off PST on Sunday, November 1, changing 573309583Sglebius# their time to AKST and are going to follow Alaska's DST, switching 574309583Sglebius# between AKST and AKDT from now on.... 575325324Sgordon# https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ 576309583Sglebius 57714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 578325324SgordonZone America/Juneau 15:02:19 - LMT 1867 Oct 19 15:33:32 57975267Swollman -8:57:41 - LMT 1900 Aug 20 12:00 58014343Swollman -8:00 - PST 1942 58114343Swollman -8:00 US P%sT 1946 58214343Swollman -8:00 - PST 1969 583273718Sedwin -8:00 US P%sT 1980 Apr 27 2:00 584273718Sedwin -9:00 US Y%sT 1980 Oct 26 2:00 585273718Sedwin -8:00 US P%sT 1983 Oct 30 2:00 586136638Swollman -9:00 US Y%sT 1983 Nov 30 58714343Swollman -9:00 US AK%sT 588325324SgordonZone America/Sitka 14:58:47 - LMT 1867 Oct 19 15:30 589219411Sedwin -9:01:13 - LMT 1900 Aug 20 12:00 590219411Sedwin -8:00 - PST 1942 591219411Sedwin -8:00 US P%sT 1946 592219411Sedwin -8:00 - PST 1969 593273718Sedwin -8:00 US P%sT 1983 Oct 30 2:00 594219411Sedwin -9:00 US Y%sT 1983 Nov 30 595219411Sedwin -9:00 US AK%sT 596325324SgordonZone America/Metlakatla 15:13:42 - LMT 1867 Oct 19 15:44:55 597219411Sedwin -8:46:18 - LMT 1900 Aug 20 12:00 598219411Sedwin -8:00 - PST 1942 599219411Sedwin -8:00 US P%sT 1946 600219411Sedwin -8:00 - PST 1969 601273718Sedwin -8:00 US P%sT 1983 Oct 30 2:00 602309583Sglebius -8:00 - PST 2015 Nov 1 2:00 603309583Sglebius -9:00 US AK%sT 604325324SgordonZone America/Yakutat 14:41:05 - LMT 1867 Oct 19 15:12:18 60575267Swollman -9:18:55 - LMT 1900 Aug 20 12:00 60614343Swollman -9:00 - YST 1942 60714343Swollman -9:00 US Y%sT 1946 60814343Swollman -9:00 - YST 1969 609136638Swollman -9:00 US Y%sT 1983 Nov 30 61014343Swollman -9:00 US AK%sT 611325324SgordonZone America/Anchorage 14:00:24 - LMT 1867 Oct 19 14:31:37 61275267Swollman -9:59:36 - LMT 1900 Aug 20 12:00 613325324Sgordon -10:00 - AST 1942 614325324Sgordon -10:00 US A%sT 1967 Apr 61514343Swollman -10:00 - AHST 1969 616273718Sedwin -10:00 US AH%sT 1983 Oct 30 2:00 617136638Swollman -9:00 US Y%sT 1983 Nov 30 61814343Swollman -9:00 US AK%sT 619325324SgordonZone America/Nome 12:58:22 - LMT 1867 Oct 19 13:29:35 62075267Swollman -11:01:38 - LMT 1900 Aug 20 12:00 62114343Swollman -11:00 - NST 1942 62214343Swollman -11:00 US N%sT 1946 62314343Swollman -11:00 - NST 1967 Apr 62414343Swollman -11:00 - BST 1969 625273718Sedwin -11:00 US B%sT 1983 Oct 30 2:00 626136638Swollman -9:00 US Y%sT 1983 Nov 30 62714343Swollman -9:00 US AK%sT 628325324SgordonZone America/Adak 12:13:22 - LMT 1867 Oct 19 12:44:35 62975267Swollman -11:46:38 - LMT 1900 Aug 20 12:00 63014343Swollman -11:00 - NST 1942 63114343Swollman -11:00 US N%sT 1946 63214343Swollman -11:00 - NST 1967 Apr 63314343Swollman -11:00 - BST 1969 634273718Sedwin -11:00 US B%sT 1983 Oct 30 2:00 635136638Swollman -10:00 US AH%sT 1983 Nov 30 636283079Sedwin -10:00 US H%sT 637149514Swollman# The following switches don't quite make our 1970 cutoff. 638149514Swollman# 63914343Swollman# Shanks writes that part of southwest Alaska (e.g. Aniak) 64014343Swollman# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 64114343Swollman# and another part (e.g. Akiak) made the same switch five weeks later. 642149514Swollman# 643149514Swollman# From David Flater (2004-11-09): 644149514Swollman# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 645149514Swollman# Historic Preservation Commission, provided this information, which 646149514Swollman# suggests that Unalaska deviated from statutory time from early 1967 647149514Swollman# possibly until 1983: 648149514Swollman# 649149514Swollman# Minutes of the Unalaska City Council Meeting, January 10, 1967: 650149514Swollman# "Except for St. Paul and Akutan, Unalaska is the only important 651149514Swollman# location not on Alaska Standard Time. The following resolution was 652273718Sedwin# made by William Robinson and seconded by Henry Swanson: Be it 653149514Swollman# resolved that the City of Unalaska hereby goes to Alaska Standard 654149514Swollman# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 655149514Swollman# January 14, Alaska Standard Time.) This resolution was passed with 656149514Swollman# three votes for and one against." 6572742Swollman 65814343Swollman# Hawaii 659218122Sedwin 660218122Sedwin# From Arthur David Olson (2010-12-09): 661218122Sedwin# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 662218122Sedwin# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 663218122Sedwin# the article is available at 664325324Sgordon# https://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 665218122Sedwin# and indicates that standard time was adopted effective noon, January 666218122Sedwin# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 667218122Sedwin# saving for the period between the last Sunday of each April and the 668218122Sedwin# last Sunday of each September, but less than a month later repealed the 669218122Sedwin# act," (page 220), that year-round daylight saving time was in effect 670218122Sedwin# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 671218122Sedwin# when clocks changed) and that clocks were changed by 30 minutes 672218122Sedwin# effective the second Sunday of June, 1947 (page 219, with no time of 673218122Sedwin# day given for when clocks changed). A footnote for the 1933 changes 674218122Sedwin# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 675218122Sedwin# and Act 163 (approved 21 May 1933)." 676218122Sedwin 677218122Sedwin# From Arthur David Olson (2011-01-19): 678218122Sedwin# The following is from "Laws of the Territory of Hawaii Passed by the 679218122Sedwin# Seventeenth Legislature: Regular Session 1933," available (as of 680218122Sedwin# 2011-01-19) at American University's Pence Law Library. Page 85: "Act 681218122Sedwin# 90...At 2 o'clock ante meridian of the last Sunday in April of each 682218122Sedwin# year, the standard time of this Territory shall be advanced one 683218122Sedwin# hour...This Act shall take effect upon its approval. Approved this 26th 684218122Sedwin# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 685273718Sedwin# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 686218122Sedwin# hereby repealed...This Act shall take effect upon its approval, upon 687218122Sedwin# which date the standard time of this Territory shall be restored to 688218122Sedwin# that existing immediately prior to the taking effect of said Act 90. 689218122Sedwin# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 690218122Sedwin# of the Territory of Hawaii." 69114343Swollman# 692218122Sedwin# Note that 1933-05-21 was a Sunday. 693218122Sedwin# We're left to guess the time of day when Act 163 was approved; guess noon. 694218122Sedwin 695273718Sedwin# Zone NAME GMTOFF RULES FORMAT [UNTIL] 696273718SedwinZone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 697273718Sedwin -10:30 - HST 1933 Apr 30 2:00 698273718Sedwin -10:30 1:00 HDT 1933 May 21 12:00 699273718Sedwin -10:30 - HST 1942 Feb 9 2:00 700273718Sedwin -10:30 1:00 HDT 1945 Sep 30 2:00 701273718Sedwin -10:30 - HST 1947 Jun 8 2:00 70214343Swollman -10:00 - HST 703257681Sedwin 70414343Swollman# Now we turn to US areas that have diverged from the consensus since 1970. 70514343Swollman 70614343Swollman# Arizona mostly uses MST. 707114173Swollman 708114173Swollman# From Paul Eggert (2002-10-20): 709114173Swollman# 710114173Swollman# The information in the rest of this paragraph is derived from the 711270728Spluknet# Daylight Saving Time web page 712270728Spluknet# <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23) 713270728Spluknet# maintained by the Arizona State Library, Archives and Public Records. 714114173Swollman# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 715114173Swollman# time, but by federal law railroads, airlines, bus lines, military 716114173Swollman# personnel, and some engaged in interstate commerce continued to 717114173Swollman# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 718114173Swollman# Gazette says that was the date the law changed, and that 04-01 was 719114173Swollman# the date the state's clocks would change. In 1945 the State of 720114173Swollman# Arizona used standard time all year, again with exceptions only as 721114173Swollman# mandated by federal law. Arizona observed DST in 1967, but Arizona 722114173Swollman# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 723114173Swollman# 724114173Swollman# Shanks says the 1944 experiment came to an end on 1944-03-17. 725114173Swollman# Go with the Arizona State Library instead. 726114173Swollman 727273718Sedwin# Zone NAME GMTOFF RULES FORMAT [UNTIL] 728149514SwollmanZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 729273718Sedwin -7:00 US M%sT 1944 Jan 1 0:01 730273718Sedwin -7:00 - MST 1944 Apr 1 0:01 731273718Sedwin -7:00 US M%sT 1944 Oct 1 0:01 73214343Swollman -7:00 - MST 1967 733114173Swollman -7:00 US M%sT 1968 Mar 21 73414343Swollman -7:00 - MST 73519878Swollman# From Arthur David Olson (1988-02-13): 73614343Swollman# A writer from the Inter Tribal Council of Arizona, Inc., 737136638Swollman# notes in private correspondence dated 1987-12-28 that "Presently, only the 7382742Swollman# Navajo Nation participates in the Daylight Saving Time policy, due to its 7392742Swollman# large size and location in three states." (The "only" means that other 7402742Swollman# tribal nations don't use DST.) 741257681Sedwin# 742257681Sedwin# From Paul Eggert (2013-08-26): 743257681Sedwin# See America/Denver for a zone appropriate for the Navajo Nation. 7442742Swollman 745136638Swollman# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 746136638Swollman# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 747136638Swollman# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 748136638Swollman# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 749171948Sedwin# Teton, Twin Falls, Valley, Washington counties, and the southern 750171948Sedwin# quarter of Idaho county) and eastern Oregon (most of Malheur County) 751136638Swollman# switched four weeks late in 1974. 752149514Swollman# 75314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 754149514SwollmanZone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 755273718Sedwin -8:00 US P%sT 1923 May 13 2:00 75614343Swollman -7:00 US M%sT 1974 757273718Sedwin -7:00 - MST 1974 Feb 3 2:00 75814343Swollman -7:00 US M%sT 7592742Swollman 76014343Swollman# Indiana 76114343Swollman# 76258787Sru# For a map of Indiana's time zone regions, see: 763325324Sgordon# https://en.wikipedia.org/wiki/Time_in_Indiana 76458787Sru# 765171948Sedwin# From Paul Eggert (2007-08-17): 766149590Swollman# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 767149590Swollman# with the following exceptions: 768149590Swollman# 769149590Swollman# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 770270728Spluknet# Vanderburgh, and Warrick counties have been like America/Chicago. 771149590Swollman# 772149590Swollman# - Dearborn and Ohio counties have been like America/New_York. 773149590Swollman# 774149590Swollman# - Clark, Floyd, and Harrison counties have been like 775149590Swollman# America/Kentucky/Louisville. 776149590Swollman# 777171948Sedwin# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 778171948Sedwin# and Switzerland counties have their own time zone histories as noted below. 779158421Swollman# 780158421Swollman# Shanks partitioned Indiana into 345 regions, each with its own time history, 781257681Sedwin# and wrote "Even newspaper reports present contradictory information." 782158421Swollman# Those Hoosiers! Such a flighty and changeable people! 78314343Swollman# Fortunately, most of the complexity occurred before our cutoff date of 1970. 78414343Swollman# 78514343Swollman# Other than Indianapolis, the Indiana place names are so nondescript 786257681Sedwin# that they would be ambiguous if we left them at the 'America' level. 787257681Sedwin# So we reluctantly put them all in a subdirectory 'America/Indiana'. 78875267Swollman 789270728Spluknet# From Paul Eggert (2014-06-26): 790270728Spluknet# https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana 791270728Spluknet# says "DOT is relocating the time zone boundary in Indiana to move Starke, 792158421Swollman# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 793158421Swollman# Eastern Time Zone to the Central Time Zone.... The effective date of 794270728Spluknet# this rule is 2 a.m. EST Sunday, April 2, 2006, which is the 795158421Swollman# changeover date from standard time to Daylight Saving Time." 796270728Spluknet# Strictly speaking, this meant the affected counties changed their 797270728Spluknet# clocks twice that night, but this obviously was in error. The intent 798270728Spluknet# was that 01:59:59 EST be followed by 02:00:00 CDT. 799158421Swollman 800169811Swollman# From Gwillim Law (2007-02-10): 801169811Swollman# The Associated Press has been reporting that Pulaski County, Indiana is 802169811Swollman# going to switch from Central to Eastern Time on March 11, 2007.... 803169811Swollman# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 804169811Swollman 80514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 80614343SwollmanRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 80714343SwollmanRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 80814343SwollmanRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 80914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 810273718SedwinZone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 81114343Swollman -6:00 US C%sT 1920 81214343Swollman -6:00 Indianapolis C%sT 1942 81314343Swollman -6:00 US C%sT 1946 814273718Sedwin -6:00 Indianapolis C%sT 1955 Apr 24 2:00 815273718Sedwin -5:00 - EST 1957 Sep 29 2:00 816273718Sedwin -6:00 - CST 1958 Apr 27 2:00 81714343Swollman -5:00 - EST 1969 81814343Swollman -5:00 US E%sT 1971 819149514Swollman -5:00 - EST 2006 820149514Swollman -5:00 US E%sT 8212742Swollman# 822158421Swollman# Eastern Crawford County, Indiana, left its clocks alone in 1974, 823158421Swollman# as well as from 1976 through 2005. 82414343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 82514343SwollmanRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 82614343SwollmanRule Marengo 1951 only - Sep lastSun 2:00 0 S 82714343SwollmanRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 82814343SwollmanRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 82914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 830149514SwollmanZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 83114343Swollman -6:00 US C%sT 1951 832273718Sedwin -6:00 Marengo C%sT 1961 Apr 30 2:00 83314343Swollman -5:00 - EST 1969 834273718Sedwin -5:00 US E%sT 1974 Jan 6 2:00 835273718Sedwin -6:00 1:00 CDT 1974 Oct 27 2:00 83614343Swollman -5:00 US E%sT 1976 837149514Swollman -5:00 - EST 2006 838149514Swollman -5:00 US E%sT 83914343Swollman# 840171948Sedwin# Daviess, Dubois, Knox, and Martin Counties, Indiana, 841171948Sedwin# switched from eastern to central time in April 2006, then switched back 842171948Sedwin# in November 2007. 843158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 844158421SwollmanRule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 845158421SwollmanRule Vincennes 1946 only - Sep lastSun 2:00 0 S 846158421SwollmanRule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 847158421SwollmanRule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 848158421SwollmanRule Vincennes 1955 only - May 1 0:00 1:00 D 849158421SwollmanRule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 850158421SwollmanRule Vincennes 1960 only - Oct lastSun 2:00 0 S 851158421SwollmanRule Vincennes 1961 only - Sep lastSun 2:00 0 S 852158421SwollmanRule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 853158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 854158421SwollmanZone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 855158421Swollman -6:00 US C%sT 1946 856273718Sedwin -6:00 Vincennes C%sT 1964 Apr 26 2:00 857158421Swollman -5:00 - EST 1969 858158421Swollman -5:00 US E%sT 1971 859273718Sedwin -5:00 - EST 2006 Apr 2 2:00 860273718Sedwin -6:00 US C%sT 2007 Nov 4 2:00 861171948Sedwin -5:00 US E%sT 862171948Sedwin# 863171948Sedwin# Perry County, Indiana, switched from eastern to central time in April 2006. 864171948Sedwin# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 865171948SedwinRule Perry 1946 only - Apr lastSun 2:00 1:00 D 866171948SedwinRule Perry 1946 only - Sep lastSun 2:00 0 S 867171948SedwinRule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 868171948SedwinRule Perry 1953 1959 - Sep lastSun 2:00 0 S 869171948SedwinRule Perry 1955 only - May 1 0:00 1:00 D 870171948SedwinRule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 871171948SedwinRule Perry 1960 only - Oct lastSun 2:00 0 S 872171948SedwinRule Perry 1961 only - Sep lastSun 2:00 0 S 873171948SedwinRule Perry 1962 1963 - Oct lastSun 2:00 0 S 874171948Sedwin# Zone NAME GMTOFF RULES FORMAT [UNTIL] 875171948SedwinZone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 876171948Sedwin -6:00 US C%sT 1946 877273718Sedwin -6:00 Perry C%sT 1964 Apr 26 2:00 878171948Sedwin -5:00 - EST 1969 879171948Sedwin -5:00 US E%sT 1971 880273718Sedwin -5:00 - EST 2006 Apr 2 2:00 881158421Swollman -6:00 US C%sT 882158421Swollman# 883158421Swollman# Pike County, Indiana moved from central to eastern time in 1977, 884171948Sedwin# then switched back in 2006, then switched back again in 2007. 885158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 886158421SwollmanRule Pike 1955 only - May 1 0:00 1:00 D 887158421SwollmanRule Pike 1955 1960 - Sep lastSun 2:00 0 S 888158421SwollmanRule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 889158421SwollmanRule Pike 1961 1964 - Oct lastSun 2:00 0 S 890158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 891158421SwollmanZone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 892158421Swollman -6:00 US C%sT 1955 893273718Sedwin -6:00 Pike C%sT 1965 Apr 25 2:00 894273718Sedwin -5:00 - EST 1966 Oct 30 2:00 895273718Sedwin -6:00 US C%sT 1977 Oct 30 2:00 896273718Sedwin -5:00 - EST 2006 Apr 2 2:00 897273718Sedwin -6:00 US C%sT 2007 Nov 4 2:00 898171948Sedwin -5:00 US E%sT 899158421Swollman# 900158421Swollman# Starke County, Indiana moved from central to eastern time in 1991, 901158421Swollman# then switched back in 2006. 90219878Swollman# From Arthur David Olson (1991-10-28): 90319878Swollman# An article on page A3 of the Sunday, 1991-10-27 Washington Post 90414343Swollman# notes that Starke County switched from Central time to Eastern time as of 90519878Swollman# 1991-10-27. 90614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 90714343SwollmanRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 90814343SwollmanRule Starke 1947 1954 - Sep lastSun 2:00 0 S 90914343SwollmanRule Starke 1955 1956 - Oct lastSun 2:00 0 S 91014343SwollmanRule Starke 1957 1958 - Sep lastSun 2:00 0 S 91114343SwollmanRule Starke 1959 1961 - Oct lastSun 2:00 0 S 91214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 913149514SwollmanZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 91414343Swollman -6:00 US C%sT 1947 915273718Sedwin -6:00 Starke C%sT 1962 Apr 29 2:00 916273718Sedwin -5:00 - EST 1963 Oct 27 2:00 917273718Sedwin -6:00 US C%sT 1991 Oct 27 2:00 918273718Sedwin -5:00 - EST 2006 Apr 2 2:00 919158421Swollman -6:00 US C%sT 92014343Swollman# 921169811Swollman# Pulaski County, Indiana, switched from eastern to central time in 922169811Swollman# April 2006 and then switched back in March 2007. 923169811Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 924169811SwollmanRule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 925169811SwollmanRule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 926169811SwollmanRule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 927169811SwollmanRule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 928169811Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 929169811SwollmanZone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 930169811Swollman -6:00 US C%sT 1946 931273718Sedwin -6:00 Pulaski C%sT 1961 Apr 30 2:00 932169811Swollman -5:00 - EST 1969 933169811Swollman -5:00 US E%sT 1971 934273718Sedwin -5:00 - EST 2006 Apr 2 2:00 935273718Sedwin -6:00 US C%sT 2007 Mar 11 2:00 936169811Swollman -5:00 US E%sT 937169811Swollman# 938158421Swollman# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 93914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 940149514SwollmanZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 941273718Sedwin -6:00 US C%sT 1954 Apr 25 2:00 94214343Swollman -5:00 - EST 1969 94314343Swollman -5:00 US E%sT 1973 944149514Swollman -5:00 - EST 2006 945149514Swollman -5:00 US E%sT 9462742Swollman 94714343Swollman# Part of Kentucky left its clocks alone in 1974. 948149590Swollman# This also includes Clark, Floyd, and Harrison counties in Indiana. 94914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 95014343SwollmanRule Louisville 1921 only - May 1 2:00 1:00 D 95114343SwollmanRule Louisville 1921 only - Sep 1 2:00 0 S 95214343SwollmanRule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 95314343SwollmanRule Louisville 1941 only - Sep lastSun 2:00 0 S 95414343SwollmanRule Louisville 1946 only - Jun 2 2:00 0 S 95514343SwollmanRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 95614343SwollmanRule Louisville 1956 1960 - Oct lastSun 2:00 0 S 95714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 958149514SwollmanZone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 95914343Swollman -6:00 US C%sT 1921 96014343Swollman -6:00 Louisville C%sT 1942 96114343Swollman -6:00 US C%sT 1946 962273718Sedwin -6:00 Louisville C%sT 1961 Jul 23 2:00 96314343Swollman -5:00 - EST 1968 964273718Sedwin -5:00 US E%sT 1974 Jan 6 2:00 965273718Sedwin -6:00 1:00 CDT 1974 Oct 27 2:00 96614343Swollman -5:00 US E%sT 96767578Swollman# 968158421Swollman# Wayne County, Kentucky 96958787Sru# 970270728Spluknet# From Lake Cumberland LIFE 971273718Sedwin# http://www.lake-cumberland.com/life/archive/news990129time.shtml 972270728Spluknet# (1999-01-29) via WKYM-101.7: 97358787Sru# Clinton County has joined Wayne County in asking the DoT to change from 97458787Sru# the Central to the Eastern time zone.... The Wayne County government made 97558787Sru# the same request in December. And while Russell County officials have not 97658787Sru# taken action, the majority of respondents to a poll conducted there in 97758787Sru# August indicated they would like to change to "fast time" also. 97858787Sru# The three Lake Cumberland counties are the farthest east of any U.S. 97958787Sru# location in the Central time zone. 98067578Swollman# 98167578Swollman# From Rich Wales (2000-08-29): 98267578Swollman# After prolonged debate, and despite continuing deep differences of opinion, 98367578Swollman# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 98475267Swollman# (-0500) time. They won't "fall back" this year. See Sara Shipley, 98575267Swollman# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 98686222Swollman# 98786222Swollman# From Paul Eggert (2001-07-16): 98886222Swollman# The final rule was published in the 989270728Spluknet# Federal Register 65, 160 (2000-08-17), pp 50154-50158. 990325324Sgordon# https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm 991114173Swollman# 992149514SwollmanZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 99367578Swollman -6:00 US C%sT 1946 99467578Swollman -6:00 - CST 1968 99567578Swollman -6:00 US C%sT 2000 Oct 29 2:00 99667578Swollman -5:00 US E%sT 9972742Swollman 99867578Swollman 99967578Swollman# From Rives McDow (2000-08-30): 100067578Swollman# Here ... are all the changes in the US since 1985. 100167578Swollman# Kearny County, KS (put all of county on central; 100267578Swollman# previously split between MST and CST) ... 1990-10 100367578Swollman# Starke County, IN (from CST to EST) ... 1991-10 100467578Swollman# Oliver County, ND (from MST to CST) ... 1992-10 100567578Swollman# West Wendover, NV (from PST TO MST) ... 1999-10 100667578Swollman# Wayne County, KY (from CST to EST) ... 2000-10 100767578Swollman# 100886222Swollman# From Paul Eggert (2001-07-17): 100986222Swollman# We don't know where the line used to be within Kearny County, KS, 101086222Swollman# so omit that change for now. 101186222Swollman# See America/Indiana/Knox for the Starke County, IN change. 101286222Swollman# See America/North_Dakota/Center for the Oliver County, ND change. 101386222Swollman# West Wendover, NV officially switched from Pacific to mountain time on 101486222Swollman# 1999-10-31. See the 1015270728Spluknet# Federal Register 64, 203 (1999-10-21), pp 56705-56707. 1016325324Sgordon# https://www.gpo.gov/fdsys/pkg/FR-1999-10-21/html/99-27240.htm 101786222Swollman# However, the Federal Register says that West Wendover already operated 101886222Swollman# on mountain time, and the rule merely made this official; 101986222Swollman# hence a separate tz entry is not needed. 102067578Swollman 102114343Swollman# Michigan 102214343Swollman# 102319878Swollman# From Bob Devine (1988-01-28): 102414343Swollman# Michigan didn't observe DST from 1968 to 1973. 102514343Swollman# 102658787Sru# From Paul Eggert (1999-03-31): 102758787Sru# Shanks writes that Michigan started using standard time on 1885-09-18, 102858787Sru# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 102958787Sru# that Detroit kept 103014343Swollman# 103114343Swollman# local time until 1900 when the City Council decreed that clocks should 103214343Swollman# be put back twenty-eight minutes to Central Standard Time. Half the 103314343Swollman# city obeyed, half refused. After considerable debate, the decision 103414343Swollman# was rescinded and the city reverted to Sun time. A derisive offer to 103514343Swollman# erect a sundial in front of the city hall was referred to the 103614343Swollman# Committee on Sewers. Then, in 1905, Central time was adopted 103714343Swollman# by city vote. 103814343Swollman# 103914343Swollman# This story is too entertaining to be false, so go with Howse over Shanks. 104014343Swollman# 104175267Swollman# From Paul Eggert (2001-03-06): 1042257681Sedwin# Garland (1927) writes "Cleveland and Detroit advanced their clocks 1043257681Sedwin# one hour in 1914." This change is not in Shanks. We have no more 104475267Swollman# info, so omit this for now. 104575267Swollman# 1046325324Sgordon# From Paul Eggert (2017-07-26): 1047325324Sgordon# Although Shanks says Detroit observed DST in 1967 from 06-14 00:01 1048325324Sgordon# until 10-29 00:01, I now see multiple reports that this is incorrect. 1049325324Sgordon# For example, according to a 50-year anniversary report about the 1967 1050325324Sgordon# Detroit riots and a major-league doubleheader on 1967-07-23, "By the time 1051325324Sgordon# the last fly ball of the doubleheader settled into the glove of leftfielder 1052325324Sgordon# Lenny Green, it was after 7 p.m. Detroit did not observe daylight saving 1053325324Sgordon# time, so light was already starting to fail. Twilight was made even deeper 1054325324Sgordon# by billowing columns of smoke that ascended in an unbroken wall north of the 1055325324Sgordon# ballpark." See: Dow B. Detroit '67: As violence unfolded, Tigers played two 1056325324Sgordon# at home vs. Yankees. Detroit Free Press 2017-07-23. 1057325324Sgordon# https://www.freep.com/story/sports/mlb/tigers/2017/07/23/detroit-tigers-1967-riot-new-york-yankees/499951001/ 1058325324Sgordon# 105914343Swollman# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 106014343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 106114343SwollmanRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 106214343SwollmanRule Detroit 1948 only - Sep lastSun 2:00 0 S 106314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 106414343SwollmanZone America/Detroit -5:32:11 - LMT 1905 1065273718Sedwin -6:00 - CST 1915 May 15 2:00 106614343Swollman -5:00 - EST 1942 106714343Swollman -5:00 US E%sT 1946 106814343Swollman -5:00 Detroit E%sT 1973 106914343Swollman -5:00 US E%sT 1975 1070273718Sedwin -5:00 - EST 1975 Apr 27 2:00 107114343Swollman -5:00 US E%sT 107214343Swollman# 1073158421Swollman# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 1074158421Swollman# switched from EST to CST/CDT in 1973. 107514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 107614343SwollmanRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 107714343SwollmanRule Menominee 1946 only - Sep lastSun 2:00 0 S 107814343SwollmanRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 107914343SwollmanRule Menominee 1966 only - Oct lastSun 2:00 0 S 108014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 108114343SwollmanZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 108214343Swollman -6:00 US C%sT 1946 1083273718Sedwin -6:00 Menominee C%sT 1969 Apr 27 2:00 1084273718Sedwin -5:00 - EST 1973 Apr 29 2:00 108514343Swollman -6:00 US C%sT 108614343Swollman 10872742Swollman# Navassa 108886222Swollman# administered by the US Fish and Wildlife Service 108943543Swollman# claimed by US under the provisions of the 1856 Guano Islands Act 109043543Swollman# also claimed by Haiti 109143543Swollman# occupied 1857/1900 by the Navassa Phosphate Co 109286222Swollman# US lighthouse 1917/1996-09 109343543Swollman# currently uninhabited 1094257681Sedwin# see Mark Fineman, "An Isle Rich in Guano and Discord", 109543543Swollman# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 109643543Swollman# Jimmy Skaggs, _The Great Guano Rush_ (1994). 109714343Swollman 10982742Swollman################################################################################ 10992742Swollman 11002742Swollman 1101325324Sgordon# From Paul Eggert (2017-02-10): 1102274559Sedwin# 1103274559Sedwin# Unless otherwise specified, the source for data through 1990 is: 1104158421Swollman# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1105158421Swollman# San Diego: ACS Publications, Inc. (2003). 1106274559Sedwin# Unfortunately this book contains many errors and cites no sources. 11072742Swollman# 1108325324Sgordon# Many years ago Gwillim Law wrote that a good source 1109325324Sgordon# for time zone data was the International Air Transport 111020094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 111120094Swollman# published semiannually. Law sent in several helpful summaries 1112274559Sedwin# of the IATA's data after 1990. Except where otherwise noted, 1113274559Sedwin# IATA SSIM is the source for entries after 1990. 111420094Swollman# 1115121098Swollman# Other sources occasionally used include: 11162742Swollman# 1117121098Swollman# Edward W. Whitman, World Time Differences, 1118121098Swollman# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1119121098Swollman# which I found in the UCLA library. 1120121098Swollman# 1121121098Swollman# William Willett, The Waste of Daylight, 19th edition 1122267473Sedwin# <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf> 1123267473Sedwin# [PDF] (1914-03) 1124121098Swollman# 1125248307Sedwin# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1126325324Sgordon# <https://www.jstor.org/stable/1774359>. 1127248307Sedwin# 1128257681Sedwin# See the 'europe' file for Greenland. 11292742Swollman 11302742Swollman# Canada 11312742Swollman 1132270728Spluknet# From Alain LaBont�� (1994-11-14): 11339908Swollman# I post here the time zone abbreviations standardized in Canada 11349908Swollman# for both English and French in the CAN/CSA-Z234.4-89 standard.... 11359908Swollman# 1136270728Spluknet# UTC Standard time Daylight saving time 11379908Swollman# offset French English French English 11389908Swollman# -2:30 - - HAT NDT 11399908Swollman# -3 - - HAA ADT 11409908Swollman# -3:30 HNT NST - - 11419908Swollman# -4 HNA AST HAE EDT 11429908Swollman# -5 HNE EST HAC CDT 11439908Swollman# -6 HNC CST HAR MDT 11449908Swollman# -7 HNR MST HAP PDT 11459908Swollman# -8 HNP PST HAY YDT 11469908Swollman# -9 HNY YST - - 11479908Swollman# 11489908Swollman# HN: Heure Normale ST: Standard Time 1149270728Spluknet# HA: Heure Avanc��e DT: Daylight saving Time 11509908Swollman# 11519908Swollman# A: de l'Atlantique Atlantic 11529908Swollman# C: du Centre Central 11539908Swollman# E: de l'Est Eastern 11549908Swollman# M: Mountain 11559908Swollman# N: Newfoundland 11569908Swollman# P: du Pacifique Pacific 11579908Swollman# R: des Rocheuses 11589908Swollman# T: de Terre-Neuve 11599908Swollman# Y: du Yukon Yukon 11609908Swollman# 1161149514Swollman# From Paul Eggert (1994-11-22): 11629908Swollman# Alas, this sort of thing must be handled by localization software. 11632742Swollman 1164273718Sedwin# Unless otherwise specified, the data entries for Canada are all from Shanks 1165158421Swollman# & Pottenger. 11669908Swollman 1167169811Swollman# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1168169811Swollman# 2007-03-01): 1169158421Swollman# The British Columbia government announced yesterday that it will 1170158421Swollman# adjust daylight savings next year to align with changes in the 1171158421Swollman# U.S. and the rest of Canada.... 1172325324Sgordon# https://archive.news.gov.bc.ca/releases/news_releases_2005-2009/2006AG0014-000330.htm 1173169811Swollman# ... 1174169811Swollman# Nova Scotia 1175163302Sru# Daylight saving time will be extended by four weeks starting in 2007.... 1176325324Sgordon# https://www.novascotia.ca/just/regulations/rg2/2006/ma1206.pdf 1177169811Swollman# 1178163302Sru# [For New Brunswick] the new legislation dictates that the time change is to 1179163302Sru# be done at 02:00 instead of 00:01. 1180325324Sgordon# https://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1181163302Sru# ... 1182163302Sru# Manitoba has traditionally changed the clock every fall at 03:00. 1183163302Sru# As of 2006, the transition is to take place one hour earlier at 02:00. 1184325324Sgordon# https://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1185163302Sru# ... 1186163302Sru# [Alberta, Ontario, Quebec] will follow US rules. 1187169811Swollman# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1188163302Sru# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1189169811Swollman# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1190163302Sru# ... 1191169811Swollman# P.E.I. will follow US rules.... 1192169811Swollman# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1193163302Sru# ... 1194169811Swollman# Province of Newfoundland and Labrador.... 1195169811Swollman# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1196163302Sru# ... 1197169811Swollman# Yukon 1198325324Sgordon# https://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1199169811Swollman# ... 1200163302Sru# N.W.T. will follow US rules. Whoever maintains the government web site 1201163302Sru# does not seem to believe in bookmarks. To see the news release, click the 1202163302Sru# following link and search for "Daylight Savings Time Change". Press the 1203163302Sru# "Daylight Savings Time Change" link; it will fire off a popup using 1204163302Sru# JavaScript. 1205163302Sru# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1206169811Swollman# ... 1207169811Swollman# Nunavut 1208169811Swollman# An amendment to the Interpretation Act was registered on February 19/2007.... 1209169811Swollman# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1210163302Sru 1211273718Sedwin# From Paul Eggert (2014-10-18): 121267578Swollman# H. David Matthews and Mary Vincent's map 121367578Swollman# "It's about TIME", _Canadian Geographic_ (September-October 1998) 1214273718Sedwin# http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp 1215270728Spluknet# contains detailed boundaries for regions observing nonstandard 121667578Swollman# time and daylight saving time arrangements in Canada circa 1998. 121767578Swollman# 1218273718Sedwin# National Research Council Canada maintains info about time zones and DST. 1219325324Sgordon# https://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html 1220325324Sgordon# https://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 122167578Swollman# Its unofficial information is often taken from Matthews and Vincent. 12229908Swollman 1223163302Sru# From Paul Eggert (2006-06-27): 1224163302Sru# For now, assume all of DST-observing Canada will fall into line with the 1225163302Sru# new US DST rules, 1226163302Sru 1227233445Sedwin# From Chris Walton (2011-12-01) 1228233445Sedwin# In the first of Tammy Hardwick's articles 1229233445Sedwin# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1230233445Sedwin# she quotes the Friday November 1/1918 edition of the Creston Review. 1231233445Sedwin# The quote includes these two statements: 1232233445Sedwin# 'Sunday the CPR went back to the old system of time...' 1233233445Sedwin# '... The daylight saving scheme was dropped all over Canada at the same time,' 1234233445Sedwin# These statements refer to a transition from daylight time to standard time 1235233445Sedwin# that occurred nationally on Sunday October 27/1918. This transition was 1236233445Sedwin# also documented in the Saturday October 26/1918 edition of the Toronto Star. 1237233445Sedwin 1238233445Sedwin# In light of that evidence, we alter the date from the earlier believed 1239233445Sedwin# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1240233445Sedwin# than Thursday) in all Canadian rulesets. 1241233445Sedwin 12422742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 124317200SwollmanRule Canada 1918 only - Apr 14 2:00 1:00 D 1244233445SedwinRule Canada 1918 only - Oct 27 2:00 0 S 1245121098SwollmanRule Canada 1942 only - Feb 9 2:00 1:00 W # War 1246121098SwollmanRule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 124717200SwollmanRule Canada 1945 only - Sep 30 2:00 0 S 124817200SwollmanRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1249153761SwollmanRule Canada 1974 2006 - Oct lastSun 2:00 0 S 1250153761SwollmanRule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1251153761SwollmanRule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1252153761SwollmanRule Canada 2007 max - Nov Sun>=1 2:00 0 S 125317200Swollman 125417200Swollman 1255163302Sru# Newfoundland and Labrador 125617200Swollman 1257325324Sgordon# From Paul Eggert (2017-10-14): 1258325324Sgordon# Legally Labrador should observe Newfoundland time; see: 1259325324Sgordon# McLeod J. Labrador time - legal or not? St. John's Telegram, 2017-10-07 1260325324Sgordon# http://www.thetelegram.com/news/local/labrador-time--legal-or-not-154860/ 1261325324Sgordon# Matthews and Vincent (1998) write that the only part of Labrador 1262325324Sgordon# that follows the rules is the southeast corner, including Port Hope 1263325324Sgordon# Simpson and Mary's Harbour, but excluding, say, Black Tickle. 126467578Swollman 126517200Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1266121098SwollmanRule StJohns 1917 only - Apr 8 2:00 1:00 D 12672742SwollmanRule StJohns 1917 only - Sep 17 2:00 0 S 1268158421Swollman# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 12692742SwollmanRule StJohns 1919 only - May 5 23:00 1:00 D 12702742SwollmanRule StJohns 1919 only - Aug 12 23:00 0 S 1271158421Swollman# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 12722742SwollmanRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 12732742SwollmanRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1274158421Swollman# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1275158421Swollman# Pottenger. 1276121098SwollmanRule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1277121098SwollmanRule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1278121098Swollman# Whitman gives the following transitions: 1279121098Swollman# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1280158421Swollman# but go with Shanks & Pottenger and assume they used Canadian rules. 12812742Swollman# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1282158421Swollman# Apr 30 - Sep 24; go with Shanks & Pottenger. 12832742SwollmanRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 12842742SwollmanRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 12852742SwollmanRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 12862742SwollmanRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 128767578SwollmanRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 128867578Swollman# From Paul Eggert (2000-10-02): 128967578Swollman# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 129067578Swollman# at 00:01 local time. For now, assume it started in 1987. 1291226289Sedwin 1292226289Sedwin# From Michael Pelley (2011-09-12): 1293226289Sedwin# We received today, Monday, September 12, 2011, notification that the 1294226289Sedwin# changes to the Newfoundland Standard Time Act have been proclaimed. 1295226289Sedwin# The change in the Act stipulates that the change from Daylight Savings 1296226289Sedwin# Time to Standard Time and from Standard Time to Daylight Savings Time 1297226289Sedwin# now occurs at 2:00AM. 1298226289Sedwin# ... 1299226289Sedwin# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1300226289Sedwin# ... 1301226289Sedwin# MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1302226289Sedwin# Office of the Chief Information Officer 1303226289Sedwin# Executive Council 1304226289Sedwin# Government of Newfoundland & Labrador 1305226289Sedwin 130667578SwollmanRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1307158421SwollmanRule StJohns 1987 2006 - Oct lastSun 0:01 0 S 130867578SwollmanRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1309158421SwollmanRule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1310226289SedwinRule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1311226289SedwinRule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1312158421Swollman# 13132742Swollman# St John's has an apostrophe, but Posix file names can't have apostrophes. 13142742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 13152742SwollmanZone America/St_Johns -3:30:52 - LMT 1884 1316121098Swollman -3:30:52 StJohns N%sT 1918 1317121098Swollman -3:30:52 Canada N%sT 1919 131820094Swollman -3:30:52 StJohns N%sT 1935 Mar 30 1319121098Swollman -3:30 StJohns N%sT 1942 May 11 1320121098Swollman -3:30 Canada N%sT 1946 1321226289Sedwin -3:30 StJohns N%sT 2011 Nov 1322226289Sedwin -3:30 Canada N%sT 13232742Swollman 132467578Swollman# most of east Labrador 132517200Swollman 1326257681Sedwin# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 132720094Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 132820094SwollmanZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1329121098Swollman -3:30:52 - NST 1918 1330121098Swollman -3:30:52 Canada N%sT 1919 133120094Swollman -3:30:52 - NST 1935 Mar 30 133220094Swollman -3:30 - NST 1936 1333121098Swollman -3:30 StJohns N%sT 1942 May 11 1334121098Swollman -3:30 Canada N%sT 1946 1335273718Sedwin -3:30 StJohns N%sT 1966 Mar 15 2:00 1336226289Sedwin -4:00 StJohns A%sT 2011 Nov 1337226289Sedwin -4:00 Canada A%sT 133820094Swollman 133920094Swollman 1340158421Swollman# west Labrador, Nova Scotia, Prince Edward I 134120094Swollman 1342286750Sedwin# From Brian Inglis (2015-07-20): 1343286750Sedwin# From the historical weather station records available at: 1344286750Sedwin# https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada 1345286750Sedwin# Sydney shares the same time history as Glace Bay, so was 1346286750Sedwin# likely to be the same across the island.... 1347286750Sedwin# Sydney, as the capital and most populous location, or Cape Breton, would 1348286750Sedwin# have been better names for the zone had we known this in 1996. 1349286750Sedwin 1350286750Sedwin# From Paul Eggert (2015-07-20): 1351158421Swollman# Shanks & Pottenger write that since 1970 most of this region has been like 1352158421Swollman# Halifax. Many locales did not observe peacetime DST until 1972; 1353286750Sedwin# the Cape Breton area, represented by Glace Bay, is the largest we know of 1354286750Sedwin# (Glace Bay was perhaps not the best name choice but no point changing now). 1355158421Swollman# Shanks & Pottenger also write that Liverpool, NS was the only town 1356158421Swollman# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1357158421Swollman# this is a typo. 135817200Swollman 13592742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1360158421SwollmanRule Halifax 1916 only - Apr 1 0:00 1:00 D 1361158421SwollmanRule Halifax 1916 only - Oct 1 0:00 0 S 1362158421SwollmanRule Halifax 1920 only - May 9 0:00 1:00 D 1363158421SwollmanRule Halifax 1920 only - Aug 29 0:00 0 S 1364158421SwollmanRule Halifax 1921 only - May 6 0:00 1:00 D 1365158421SwollmanRule Halifax 1921 1922 - Sep 5 0:00 0 S 1366158421SwollmanRule Halifax 1922 only - Apr 30 0:00 1:00 D 1367158421SwollmanRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1368158421SwollmanRule Halifax 1923 only - Sep 4 0:00 0 S 1369158421SwollmanRule Halifax 1924 only - Sep 15 0:00 0 S 1370158421SwollmanRule Halifax 1925 only - Sep 28 0:00 0 S 1371158421SwollmanRule Halifax 1926 only - May 16 0:00 1:00 D 1372158421SwollmanRule Halifax 1926 only - Sep 13 0:00 0 S 1373158421SwollmanRule Halifax 1927 only - May 1 0:00 1:00 D 1374158421SwollmanRule Halifax 1927 only - Sep 26 0:00 0 S 1375158421SwollmanRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1376158421SwollmanRule Halifax 1928 only - Sep 9 0:00 0 S 1377158421SwollmanRule Halifax 1929 only - Sep 3 0:00 0 S 1378158421SwollmanRule Halifax 1930 only - Sep 15 0:00 0 S 1379158421SwollmanRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1380158421SwollmanRule Halifax 1932 only - May 1 0:00 1:00 D 1381158421SwollmanRule Halifax 1933 only - Apr 30 0:00 1:00 D 1382158421SwollmanRule Halifax 1933 only - Oct 2 0:00 0 S 1383158421SwollmanRule Halifax 1934 only - May 20 0:00 1:00 D 1384158421SwollmanRule Halifax 1934 only - Sep 16 0:00 0 S 1385158421SwollmanRule Halifax 1935 only - Jun 2 0:00 1:00 D 1386158421SwollmanRule Halifax 1935 only - Sep 30 0:00 0 S 1387158421SwollmanRule Halifax 1936 only - Jun 1 0:00 1:00 D 1388158421SwollmanRule Halifax 1936 only - Sep 14 0:00 0 S 1389158421SwollmanRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1390158421SwollmanRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1391158421SwollmanRule Halifax 1939 only - May 28 0:00 1:00 D 1392158421SwollmanRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1393158421SwollmanRule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1394158421SwollmanRule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1395158421SwollmanRule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1396158421SwollmanRule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1397158421SwollmanRule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1398158421SwollmanRule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1399158421SwollmanRule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1400158421SwollmanRule Halifax 1962 1973 - Oct lastSun 2:00 0 S 14012742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14022742SwollmanZone America/Halifax -4:14:24 - LMT 1902 Jun 15 1403121098Swollman -4:00 Halifax A%sT 1918 1404121098Swollman -4:00 Canada A%sT 1919 1405273718Sedwin -4:00 Halifax A%sT 1942 Feb 9 2:00s 1406121098Swollman -4:00 Canada A%sT 1946 1407121098Swollman -4:00 Halifax A%sT 1974 1408121098Swollman -4:00 Canada A%sT 140917200SwollmanZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 141017200Swollman -4:00 Canada A%sT 1953 141117200Swollman -4:00 Halifax A%sT 1954 141217200Swollman -4:00 - AST 1972 1413121098Swollman -4:00 Halifax A%sT 1974 1414121098Swollman -4:00 Canada A%sT 14152742Swollman 1416158421Swollman# New Brunswick 14178029Swollman 1418169811Swollman# From Paul Eggert (2007-01-31): 1419169811Swollman# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1420169811Swollman# says they changed at 00:01 through 2006, and 1421158421Swollman# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1422169811Swollman# clear that this was the case since at least 1993. 1423163302Sru# For now, assume it started in 1993. 1424158421Swollman 1425158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1426158421SwollmanRule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1427158421SwollmanRule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1428158421SwollmanRule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1429158421SwollmanRule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1430158421SwollmanRule Moncton 1939 only - May 27 1:00 1:00 D 1431158421SwollmanRule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1432158421SwollmanRule Moncton 1940 only - May 19 1:00 1:00 D 1433158421SwollmanRule Moncton 1941 only - May 4 1:00 1:00 D 1434158421SwollmanRule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1435158421SwollmanRule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1436158421SwollmanRule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1437158421SwollmanRule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1438158421SwollmanRule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1439158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1440158421SwollmanZone America/Moncton -4:19:08 - LMT 1883 Dec 9 1441158421Swollman -5:00 - EST 1902 Jun 15 1442158421Swollman -4:00 Canada A%sT 1933 1443158421Swollman -4:00 Moncton A%sT 1942 1444158421Swollman -4:00 Canada A%sT 1946 1445158421Swollman -4:00 Moncton A%sT 1973 1446158421Swollman -4:00 Canada A%sT 1993 1447163302Sru -4:00 Moncton A%sT 2007 1448163302Sru -4:00 Canada A%sT 1449158421Swollman 1450163302Sru# Quebec 145117200Swollman 1452283042Sedwin# From Paul Eggert (2015-03-24): 1453283042Sedwin# See America/Toronto for most of Quebec, including Montreal. 1454283042Sedwin# 1455163302Sru# Matthews and Vincent (1998) also write that Quebec east of the -63 1456163302Sru# meridian is supposed to observe AST, but residents as far east as 1457163302Sru# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1458257681Sedwin# The Quebec department of justice writes in 1459270728Spluknet# "The situation in Minganie and Basse-C��te-Nord" 1460257681Sedwin# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm 1461257681Sedwin# that the coastal strip from just east of Natashquan to Blanc-Sablon 1462257681Sedwin# observes Atlantic standard time all year round. 1463325324Sgordon# https://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en 1464163302Sru# says this common practice was codified into law as of 2007. 1465163302Sru# For lack of better info, guess this practice began around 1970, contra to 1466163302Sru# Shanks & Pottenger who have this region observing AST/ADT. 1467163302Sru 1468163302Sru# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1469163302SruZone America/Blanc-Sablon -3:48:28 - LMT 1884 1470163302Sru -4:00 Canada A%sT 1970 1471163302Sru -4:00 - AST 1472163302Sru 1473163302Sru# Ontario 1474163302Sru 1475163302Sru# From Paul Eggert (2006-07-09): 1476163302Sru# Shanks & Pottenger write that since 1970 most of Ontario has been like 1477163302Sru# Toronto. 147817200Swollman# Thunder Bay skipped DST in 1973. 147917200Swollman# Many smaller locales did not observe peacetime DST until 1974; 148017200Swollman# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 148117200Swollman# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 148217200Swollman 1483121098Swollman# From Mark Brader (2003-07-26): 1484121098Swollman# [According to the Toronto Star] Orillia, Ontario, adopted DST 1485121098Swollman# effective Saturday, 1912-06-22, 22:00; the article mentions that 1486121098Swollman# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1487121098Swollman# have already done so. In Orillia DST was to run until Saturday, 1488121098Swollman# 1912-08-31 (no time mentioned), but it was met with considerable 1489121098Swollman# hostility from certain segments of the public, and was revoked after 1490270728Spluknet# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but 1491121098Swollman# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1492121098Swollman# earlier in June). 1493121098Swollman# 1494121098Swollman# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1495325324Sgordon# 1496325324Sgordon# From Paul Eggert (2017-07-08): 1497325324Sgordon# For more on Orillia, see: Daubs K. Bold attempt at daylight saving 1498325324Sgordon# time became a comic failure in Orillia. Toronto Star 2017-07-08. 1499325324Sgordon# https://www.thestar.com/news/insight/2017/07/08/bold-attempt-at-daylight-saving-time-became-a-comic-failure-in-orillia.html 1500121098Swollman 150143014Swollman# From Paul Eggert (1997-10-17): 1502121098Swollman# Mark Brader writes that an article in the 1997-10-14 Toronto Star 150343014Swollman# says that Atikokan, Ontario currently does not observe DST, 150443014Swollman# but will vote on 11-10 whether to use EST/EDT. 1505270728Spluknet# He also writes that the Ontario Time Act (1990, Chapter T.9) 1506273718Sedwin# http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html 150743014Swollman# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 150843014Swollman# Officially Atikokan is therefore on CST/CDT, and most likely this report 150943014Swollman# concerns a non-official time observed as a matter of local practice. 1510158421Swollman# 151167578Swollman# From Paul Eggert (2000-10-02): 151267578Swollman# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 151367578Swollman# New Osnaburgh observe CST all year, that Big Trout Lake observes 151467578Swollman# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 151567578Swollman# violation of the official Ontario rules. 1516163302Sru# 1517163302Sru# From Paul Eggert (2006-07-09): 1518163302Sru# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1519163302Sru# 2005-07-21 Chronicle-Journal, which said: 1520163302Sru# 1521163302Sru# The clocks in Atikokan stay set on standard time year-round. 1522163302Sru# This means they spend about half the time on central time and 1523163302Sru# the other half on eastern time. 1524163302Sru# 1525163302Sru# For the most part, the system works, Mayor Dennis Brown said. 1526163302Sru# 1527163302Sru# "The majority of businesses in Atikokan deal more with Eastern 1528163302Sru# Canada, but there are some that deal with Western Canada," he 1529163302Sru# said. "I don't see any changes happening here." 1530163302Sru# 1531163302Sru# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1532163302Sru# [New Osnaburgh] follow the same practice." 153367578Swollman 1534163302Sru# From Garry McKinnon (2006-07-14) via Chris Walton: 1535163302Sru# I chatted with a member of my board who has an outstanding memory 1536163302Sru# and a long history in Atikokan (and in the telecom industry) and he 1537163302Sru# can say for certain that Atikokan has been practicing the current 1538163302Sru# time keeping since 1952, at least. 1539163302Sru 1540163302Sru# From Paul Eggert (2006-07-17): 1541163302Sru# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1542163302Sru# ever since standard time was introduced, but the information from 1543163302Sru# McKinnon sounds more authoritative. For now, assume that Atikokan 1544163302Sru# switched to EST immediately after WWII era daylight saving time 1545163302Sru# ended. This matches the old (less-populous) America/Coral_Harbour 1546163302Sru# entry since our cutoff date of 1970, so we can move 1547163302Sru# America/Coral_Harbour to the 'backward' file. 1548163302Sru 1549210718Sedwin# From Mark Brader (2010-03-06): 1550210718Sedwin# 1551210718Sedwin# Currently the database has: 1552210718Sedwin# 1553210718Sedwin# # Ontario 1554210718Sedwin# 1555210718Sedwin# # From Paul Eggert (2006-07-09): 1556210718Sedwin# # Shanks & Pottenger write that since 1970 most of Ontario has been like 1557210718Sedwin# # Toronto. 1558210718Sedwin# # Thunder Bay skipped DST in 1973. 1559210718Sedwin# # Many smaller locales did not observe peacetime DST until 1974; 1560210718Sedwin# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1561210718Sedwin# 1562210718Sedwin# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1563210718Sedwin# right corner of page 1, it says that Toronto will return to standard 1564210718Sedwin# time at 2 am Sunday morning (which agrees with the database), and that: 1565210718Sedwin# 1566210718Sedwin# The one-hour setback will go into effect throughout most of Ontario, 1567210718Sedwin# except in areas like Windsor which remains on standard time all year. 1568210718Sedwin# 1569210718Sedwin# Windsor is, of course, a lot larger than Nipigon. 1570210718Sedwin# 1571210718Sedwin# I only came across this incidentally. I don't know if Windsor began 1572210718Sedwin# observing DST when Detroit did, or in 1974, or on some other date. 1573210718Sedwin# 1574210718Sedwin# By the way, the article continues by noting that: 1575210718Sedwin# 1576210718Sedwin# Some cities in the United States have pushed the deadline back 1577210718Sedwin# three weeks and will change over from daylight saving in October. 1578210718Sedwin 1579210718Sedwin# From Arthur David Olson (2010-07-17): 1580210718Sedwin# 1581210718Sedwin# "Standard Time and Time Zones in Canada" appeared in 1582210718Sedwin# The Journal of The Royal Astronomical Society of Canada, 1583210718Sedwin# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1584210718Sedwin# was available at 1585210718Sedwin# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1586210718Sedwin# 1587210718Sedwin# It includes the text below (starting on page 57): 1588210718Sedwin# 1589210718Sedwin# A list of the places in Canada using daylight saving time would 1590210718Sedwin# require yearly revision. From information kindly furnished by 1591210718Sedwin# the provincial governments and by the postmasters in many cities 1592210718Sedwin# and towns, it is found that the following places used daylight sav- 1593210718Sedwin# ing in 1930. The information for the province of Quebec is definite, 1594210718Sedwin# for the other provinces only approximate: 1595210718Sedwin# 1596273718Sedwin# Province Daylight saving time used 1597210718Sedwin# Prince Edward Island Not used. 1598210718Sedwin# Nova Scotia In Halifax only. 1599210718Sedwin# New Brunswick In St. John only. 1600210718Sedwin# Quebec In the following places: 1601273718Sedwin# Montreal Lachine 1602273718Sedwin# Quebec Mont-Royal 1603273718Sedwin# L��vis Iberville 1604273718Sedwin# St. Lambert Cap de la Madel��ine 1605273718Sedwin# Verdun Loretteville 1606273718Sedwin# Westmount Richmond 1607273718Sedwin# Outremont St. J��r��me 1608273718Sedwin# Longueuil Greenfield Park 1609273718Sedwin# Arvida Waterloo 1610273718Sedwin# Chambly-Canton Beaulieu 1611273718Sedwin# Melbourne La Tuque 1612273718Sedwin# St. Th��ophile Buckingham 1613210718Sedwin# Ontario Used generally in the cities and towns along 1614273718Sedwin# the southerly part of the province. Not 1615273718Sedwin# used in the northwesterly part. 1616210718Sedwin# Manitoba Not used. 1617210718Sedwin# Saskatchewan In Regina only. 1618210718Sedwin# Alberta Not used. 1619210718Sedwin# British Columbia Not used. 1620210718Sedwin# 1621210718Sedwin# With some exceptions, the use of daylight saving may be said to be limited 1622210718Sedwin# to those cities and towns lying between Quebec city and Windsor, Ont. 1623210718Sedwin 16242742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1625121098SwollmanRule Toronto 1919 only - Mar 30 23:30 1:00 D 1626121098SwollmanRule Toronto 1919 only - Oct 26 0:00 0 S 1627121098SwollmanRule Toronto 1920 only - May 2 2:00 1:00 D 1628121098SwollmanRule Toronto 1920 only - Sep 26 0:00 0 S 1629121098SwollmanRule Toronto 1921 only - May 15 2:00 1:00 D 1630121098SwollmanRule Toronto 1921 only - Sep 15 2:00 0 S 1631121098SwollmanRule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1632158421Swollman# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1633158421Swollman# was meant. 1634121098SwollmanRule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1635121098SwollmanRule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1636136638Swollman# The 1927-to-1939 rules can be expressed more simply as 1637136638Swollman# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1638136638Swollman# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1639136638Swollman# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1640136638Swollman# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1641136638Swollman# The rules below avoid use of Sun>=25 1642136638Swollman# (which pre-2004 versions of zic cannot handle). 1643136638SwollmanRule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1644136638SwollmanRule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1645136638SwollmanRule Toronto 1932 only - May 1 2:00 1:00 D 1646136638SwollmanRule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1647136638SwollmanRule Toronto 1933 only - Oct 1 2:00 0 S 1648136638SwollmanRule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1649121098SwollmanRule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1650121098SwollmanRule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1651121098SwollmanRule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1652121098SwollmanRule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1653121098SwollmanRule Toronto 1949 only - Nov lastSun 0:00 0 S 1654121098SwollmanRule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1655121098SwollmanRule Toronto 1950 only - Nov lastSun 2:00 0 S 1656121098SwollmanRule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1657158421Swollman# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1658163302Sru# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1659163302Sru# is wrong, and that he had confirmed it by checking the 1971-10-30 1660163302Sru# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1661121098SwollmanRule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1662121098Swollman 1663121098Swollman# From Paul Eggert (2003-07-27): 1664121098Swollman# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1665121098Swollman# Port Arthur, Ontario, the principle of the Bill has been in 1666121098Swollman# operation for the past three years, and in the City of Moose Jaw, 1667136638Swollman# Saskatchewan, for one year." 1668121098Swollman 1669136638Swollman# From David Bryan via Tory Tronrud, Director/Curator, 1670136638Swollman# Thunder Bay Museum (2003-11-12): 1671136638Swollman# There is some suggestion, however, that, by-law or not, daylight 1672136638Swollman# savings time was being practiced in Fort William and Port Arthur 1673136638Swollman# before 1909.... [I]n 1910, the line between the Eastern and Central 1674136638Swollman# Time Zones was permanently moved about two hundred miles west to 1675136638Swollman# include the Thunder Bay area.... When Canada adopted daylight 1676136638Swollman# savings time in 1916, Fort William and Port Arthur, having done so 1677136638Swollman# already, did not change their clocks.... During the Second World 1678136638Swollman# War,... [t]he cities agreed to implement DST during the summer 1679136638Swollman# months for the remainder of the war years. 1680136638Swollman 16812742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1682121098SwollmanZone America/Toronto -5:17:32 - LMT 1895 1683121098Swollman -5:00 Canada E%sT 1919 1684273718Sedwin -5:00 Toronto E%sT 1942 Feb 9 2:00s 1685121098Swollman -5:00 Canada E%sT 1946 1686121098Swollman -5:00 Toronto E%sT 1974 1687121098Swollman -5:00 Canada E%sT 168817200SwollmanZone America/Thunder_Bay -5:57:00 - LMT 1895 1689136638Swollman -6:00 - CST 1910 1690136638Swollman -5:00 - EST 1942 169117200Swollman -5:00 Canada E%sT 1970 1692257681Sedwin -5:00 Toronto E%sT 1973 169317200Swollman -5:00 - EST 1974 169417200Swollman -5:00 Canada E%sT 169517200SwollmanZone America/Nipigon -5:53:04 - LMT 1895 1696121098Swollman -5:00 Canada E%sT 1940 Sep 29 1697273718Sedwin -5:00 1:00 EDT 1942 Feb 9 2:00s 169817200Swollman -5:00 Canada E%sT 1699163302SruZone America/Rainy_River -6:18:16 - LMT 1895 1700121098Swollman -6:00 Canada C%sT 1940 Sep 29 1701273718Sedwin -6:00 1:00 CDT 1942 Feb 9 2:00s 170217200Swollman -6:00 Canada C%sT 1703163302SruZone America/Atikokan -6:06:28 - LMT 1895 1704163302Sru -6:00 Canada C%sT 1940 Sep 29 1705273718Sedwin -6:00 1:00 CDT 1942 Feb 9 2:00s 1706273718Sedwin -6:00 Canada C%sT 1945 Sep 30 2:00 1707163302Sru -5:00 - EST 17082742Swollman 17098029Swollman 171017200Swollman# Manitoba 171119878Swollman 1712158421Swollman# From Rob Douglas (2006-04-06): 1713158421Swollman# the old Manitoba Time Act - as amended by Bill 2, assented to 1714158421Swollman# March 27, 1987 ... said ... 1715158421Swollman# "between two o'clock Central Standard Time in the morning of 1716158421Swollman# the first Sunday of April of each year and two o'clock Central 1717158421Swollman# Standard Time in the morning of the last Sunday of October next 1718158421Swollman# following, one hour in advance of Central Standard Time."... 1719270728Spluknet# I believe that the English legislation [of the old time act] had 1720158421Swollman# been assented to (March 22, 1967).... 1721158421Swollman# Also, as far as I can tell, there was no order-in-council varying 1722158421Swollman# the time of Daylight Saving Time for 2005 and so the provisions of 1723158421Swollman# the 1987 version would apply - the changeover was at 2:00 Central 1724158421Swollman# Standard Time (i.e. not until 3:00 Central Daylight Time). 1725158421Swollman 1726158421Swollman# From Paul Eggert (2006-04-10): 1727158421Swollman# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1728158421Swollman# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1729158421Swollman# it was also 02:00s in 1966. 1730158421Swollman 17312742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17322742SwollmanRule Winn 1916 only - Apr 23 0:00 1:00 D 17332742SwollmanRule Winn 1916 only - Sep 17 0:00 0 S 17342742SwollmanRule Winn 1918 only - Apr 14 2:00 1:00 D 1735233445SedwinRule Winn 1918 only - Oct 27 2:00 0 S 17362742SwollmanRule Winn 1937 only - May 16 2:00 1:00 D 173714343SwollmanRule Winn 1937 only - Sep 26 2:00 0 S 1738121098SwollmanRule Winn 1942 only - Feb 9 2:00 1:00 W # War 1739121098SwollmanRule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 17402742SwollmanRule Winn 1945 only - Sep lastSun 2:00 0 S 17412742SwollmanRule Winn 1946 only - May 12 2:00 1:00 D 17422742SwollmanRule Winn 1946 only - Oct 13 2:00 0 S 17432742SwollmanRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 174414343SwollmanRule Winn 1947 1949 - Sep lastSun 2:00 0 S 174514343SwollmanRule Winn 1950 only - May 1 2:00 1:00 D 174614343SwollmanRule Winn 1950 only - Sep 30 2:00 0 S 174714343SwollmanRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 174814343SwollmanRule Winn 1951 1958 - Sep lastSun 2:00 0 S 17492742SwollmanRule Winn 1959 only - Oct lastSun 2:00 0 S 17502742SwollmanRule Winn 1960 only - Sep lastSun 2:00 0 S 17512742SwollmanRule Winn 1963 only - Apr lastSun 2:00 1:00 D 175214343SwollmanRule Winn 1963 only - Sep 22 2:00 0 S 1753158421SwollmanRule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1754158421SwollmanRule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1755158421SwollmanRule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 17562742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17572742SwollmanZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1758158421Swollman -6:00 Winn C%sT 2006 1759158421Swollman -6:00 Canada C%sT 17602742Swollman 17618029Swollman 176217200Swollman# Saskatchewan 176317200Swollman 1764121098Swollman# From Mark Brader (2003-07-26): 1765121098Swollman# The first actual adoption of DST in Canada was at the municipal 1766121098Swollman# level. As the [Toronto] Star put it (1912-06-07), "While people 1767121098Swollman# elsewhere have long been talking of legislation to save daylight, 1768121098Swollman# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1769121098Swollman# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1770121098Swollman# presumably late evening, as below), and would run until "the end of 1771121098Swollman# the summer". The discrepancy between municipal time and railroad 1772121098Swollman# time was noted. 1773121098Swollman 1774121098Swollman# From Paul Eggert (2003-07-27): 1775121098Swollman# Willett (1914-03) notes that DST "has been in operation ... in the 1776121098Swollman# City of Moose Jaw, Saskatchewan, for one year." 1777121098Swollman 1778158421Swollman# From Paul Eggert (2006-03-22): 1779158421Swollman# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 178017200Swollman# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 178117200Swollman# Other western towns (e.g. Lloydminster) are like Edmonton. 178267578Swollman# Matthews and Vincent (1998) write that Denare Beach and Creighton 178367578Swollman# are like Winnipeg, in violation of Saskatchewan law. 178417200Swollman 1785149514Swollman# From W. Jones (1992-11-06): 178617200Swollman# The. . .below is based on information I got from our law library, the 178717200Swollman# provincial archives, and the provincial Community Services department. 178817200Swollman# A precise history would require digging through newspaper archives, and 178917200Swollman# since you didn't say what you wanted, I didn't bother. 179017200Swollman# 179117200Swollman# Saskatchewan is split by a time zone meridian (105W) and over the years 179217200Swollman# the boundary became pretty ragged as communities near it reevaluated 179317200Swollman# their affiliations in one direction or the other. In 1965 a provincial 179417200Swollman# referendum favoured legislating common time practices. 179517200Swollman# 179617200Swollman# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 179717200Swollman# Saskatchewan 1978) was proclaimed, and established that the eastern 179817200Swollman# part of Saskatchewan would use CST year round, that districts in 179917200Swollman# northwest Saskatchewan would by default follow CST but could opt to 180017200Swollman# follow Mountain Time rules (thus 1 hour difference in the winter and 180117200Swollman# zero in the summer), and that districts in southwest Saskatchewan would 180217200Swollman# by default follow MT but could opt to follow CST. 180317200Swollman# 180417200Swollman# It took a few years for the dust to settle (I know one story of a town 180517200Swollman# on one time zone having its school in another, such that a mom had to 180617200Swollman# serve her family lunch in two shifts), but presently it seems that only 180717200Swollman# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 180817200Swollman# rules any more; all other districts appear to have used CST year round 180917200Swollman# since sometime in the 1960s. 181017200Swollman 1811163302Sru# From Chris Walton (2006-06-26): 1812163302Sru# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1813163302Sru# long and rather painful to read. 1814163302Sru# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1815163302Sru 18162742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 18172742SwollmanRule Regina 1918 only - Apr 14 2:00 1:00 D 1818233445SedwinRule Regina 1918 only - Oct 27 2:00 0 S 18192742SwollmanRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 18202742SwollmanRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 18212742SwollmanRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 18222742SwollmanRule Regina 1937 only - Oct Sun>=8 0:00 0 S 18232742SwollmanRule Regina 1938 only - Oct Sun>=1 0:00 0 S 18242742SwollmanRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1825121098SwollmanRule Regina 1942 only - Feb 9 2:00 1:00 W # War 1826121098SwollmanRule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 18272742SwollmanRule Regina 1945 only - Sep lastSun 2:00 0 S 182817200SwollmanRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 182917200SwollmanRule Regina 1946 only - Oct Sun>=8 2:00 0 S 1830121098SwollmanRule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1831121098SwollmanRule Regina 1947 1957 - Sep lastSun 2:00 0 S 1832121098SwollmanRule Regina 1959 only - Apr lastSun 2:00 1:00 D 183317200SwollmanRule Regina 1959 only - Oct lastSun 2:00 0 S 183417200Swollman# 183517200SwollmanRule Swift 1957 only - Apr lastSun 2:00 1:00 D 183617200SwollmanRule Swift 1957 only - Oct lastSun 2:00 0 S 183717200SwollmanRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 183817200SwollmanRule Swift 1959 only - Oct lastSun 2:00 0 S 183917200SwollmanRule Swift 1960 1961 - Sep lastSun 2:00 0 S 18402742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 184117200SwollmanZone America/Regina -6:58:36 - LMT 1905 Sep 1842273718Sedwin -7:00 Regina M%sT 1960 Apr lastSun 2:00 18432742Swollman -6:00 - CST 184417200SwollmanZone America/Swift_Current -7:11:20 - LMT 1905 Sep 1845273718Sedwin -7:00 Canada M%sT 1946 Apr lastSun 2:00 184617200Swollman -7:00 Regina M%sT 1950 1847273718Sedwin -7:00 Swift M%sT 1972 Apr lastSun 2:00 184817200Swollman -6:00 - CST 18492742Swollman 18508029Swollman 185117200Swollman# Alberta 185217200Swollman 18532742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 18542742SwollmanRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1855233445SedwinRule Edm 1918 only - Oct 27 2:00 0 S 18562742SwollmanRule Edm 1919 only - May 27 2:00 0 S 18572742SwollmanRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 18582742SwollmanRule Edm 1920 only - Oct lastSun 2:00 0 S 18592742SwollmanRule Edm 1921 1923 - Sep lastSun 2:00 0 S 1860121098SwollmanRule Edm 1942 only - Feb 9 2:00 1:00 W # War 1861121098SwollmanRule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 18622742SwollmanRule Edm 1945 only - Sep lastSun 2:00 0 S 18632742SwollmanRule Edm 1947 only - Apr lastSun 2:00 1:00 D 18642742SwollmanRule Edm 1947 only - Sep lastSun 2:00 0 S 18652742SwollmanRule Edm 1967 only - Apr lastSun 2:00 1:00 D 18662742SwollmanRule Edm 1967 only - Oct lastSun 2:00 0 S 18672742SwollmanRule Edm 1969 only - Apr lastSun 2:00 1:00 D 18682742SwollmanRule Edm 1969 only - Oct lastSun 2:00 0 S 18692742SwollmanRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1870158421SwollmanRule Edm 1972 2006 - Oct lastSun 2:00 0 S 18712742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18722742SwollmanZone America/Edmonton -7:33:52 - LMT 1906 Sep 1873158421Swollman -7:00 Edm M%sT 1987 1874158421Swollman -7:00 Canada M%sT 18752742Swollman 18768029Swollman 187717200Swollman# British Columbia 187817200Swollman 1879158421Swollman# From Paul Eggert (2006-03-22): 1880158421Swollman# Shanks & Pottenger write that since 1970 most of this region has 1881158421Swollman# been like Vancouver. 188258787Sru# Dawson Creek uses MST. Much of east BC is like Edmonton. 188367578Swollman# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 188417200Swollman 1885233445Sedwin# It seems though that (re: Creston) is not entirely correct: 1886233445Sedwin 1887233445Sedwin# From Chris Walton (2011-12-01): 1888233445Sedwin# There are two areas within the Canadian province of British Columbia 1889233445Sedwin# that do not currently observe daylight saving: 1890233445Sedwin# a) The Creston Valley (includes the town of Creston and surrounding area) 1891233445Sedwin# b) The eastern half of the Peace River Regional District 1892233445Sedwin# (includes the cities of Dawson Creek and Fort St. John) 1893233445Sedwin 1894233445Sedwin# Earlier this year I stumbled across a detailed article about the time 1895233445Sedwin# keeping history of Creston; it was written by Tammy Hardwick who is the 1896233445Sedwin# manager of the Creston & District Museum. The article was written in May 2009. 1897233445Sedwin# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1898233445Sedwin# According to the article, Creston has not changed its clocks since June 1918. 1899233445Sedwin# i.e. Creston has been stuck on UTC-7 for 93 years. 1900233445Sedwin# Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1901233445Sedwin 1902233445Sedwin# Unfortunately the exact date for the time change in June 1918 remains 1903233445Sedwin# unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1904233445Sedwin# ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1905273718Sedwin# as plausible as any other date (in June). She also said that after writing 1906273718Sedwin# the article she had discovered another time change in 1916; this is the 1907273718Sedwin# subject of another article which she wrote in October 2010. 1908233445Sedwin# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1909233445Sedwin 1910233445Sedwin# Here is a summary of the three clock change events in Creston's history: 1911233445Sedwin# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1912233445Sedwin# Exact date unknown 1913240457Sedwin# 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1914273718Sedwin# Exact date in October unknown; Sunday October 1 is a reasonable guess. 1915233445Sedwin# 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1916233445Sedwin# Exact date in June unknown; Sunday June 2 is a reasonable guess. 1917286750Sedwin# note 1: 1918233445Sedwin# On Oct 27/1918 when daylight saving ended in the rest of Canada, 1919233445Sedwin# Creston did not change its clocks. 1920286750Sedwin# note 2: 1921233445Sedwin# During WWII when the Federal Government legislated a mandatory clock change, 1922233445Sedwin# Creston did not oblige. 1923286750Sedwin# note 3: 1924233445Sedwin# There is no guarantee that Creston will remain on Mountain Standard Time 1925233445Sedwin# (UTC-7) forever. 1926233445Sedwin# The subject was debated at least once this year by the town Council. 1927233445Sedwin# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1928233445Sedwin 1929233445Sedwin# During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1930233445Sedwin# In Creston, that was handled by shifting the area to PST (-8:00) then applying 1931233445Sedwin# summer time to cause the offset to be -7:00, the same as it had been before 1932233445Sedwin# the change. It can be argued that the timezone abbreviation during this 1933233445Sedwin# period should be PDT rather than MST, but that doesn't seem important enough 1934233445Sedwin# (to anyone) to further complicate the rules. 1935233445Sedwin 1936233445Sedwin# The transition dates (and times) are guesses. 1937233445Sedwin 1938290697Sedwin# From Matt Johnson (2015-09-21): 1939290697Sedwin# Fort Nelson, BC, Canada will cancel DST this year. So while previously they 1940290697Sedwin# were aligned with America/Vancouver, they're now aligned with 1941290697Sedwin# America/Dawson_Creek. 1942290697Sedwin# http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html 1943290697Sedwin# 1944290697Sedwin# From Tim Parenti (2015-09-23): 1945290697Sedwin# This requires a new zone for the Northern Rockies Regional Municipality, 1946290697Sedwin# America/Fort_Nelson. The resolution of 2014-12-08 was reached following a 1947290697Sedwin# 2014-11-15 poll with nearly 75% support. Effectively, the municipality has 1948290697Sedwin# been on MST (-0700) like Dawson Creek since it advanced its clocks on 1949290697Sedwin# 2015-03-08. 1950290697Sedwin# 1951290697Sedwin# From Paul Eggert (2015-09-23): 1952290697Sedwin# Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver. 1953290697Sedwin 19542742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 19552742SwollmanRule Vanc 1918 only - Apr 14 2:00 1:00 D 1956233445SedwinRule Vanc 1918 only - Oct 27 2:00 0 S 1957121098SwollmanRule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1958121098SwollmanRule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 19592742SwollmanRule Vanc 1945 only - Sep 30 2:00 0 S 19602742SwollmanRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 19612742SwollmanRule Vanc 1946 only - Oct 13 2:00 0 S 19622742SwollmanRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1963158421SwollmanRule Vanc 1962 2006 - Oct lastSun 2:00 0 S 19642742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19652742SwollmanZone America/Vancouver -8:12:28 - LMT 1884 1966158421Swollman -8:00 Vanc P%sT 1987 1967158421Swollman -8:00 Canada P%sT 196817200SwollmanZone America/Dawson_Creek -8:00:56 - LMT 1884 196917200Swollman -8:00 Canada P%sT 1947 1970273718Sedwin -8:00 Vanc P%sT 1972 Aug 30 2:00 197117200Swollman -7:00 - MST 1972290697SedwinZone America/Fort_Nelson -8:10:47 - LMT 1884 1973290697Sedwin -8:00 Vanc P%sT 1946 1974290697Sedwin -8:00 - PST 1947 1975290697Sedwin -8:00 Vanc P%sT 1987 1976290697Sedwin -8:00 Canada P%sT 2015 Mar 8 2:00 1977290697Sedwin -7:00 - MST 1978233445SedwinZone America/Creston -7:46:04 - LMT 1884 1979233445Sedwin -7:00 - MST 1916 Oct 1 1980233445Sedwin -8:00 - PST 1918 Jun 2 1981233445Sedwin -7:00 - MST 19822742Swollman 198358787Sru# Northwest Territories, Nunavut, Yukon 198417200Swollman 1985158421Swollman# From Paul Eggert (2006-03-22): 198617200Swollman# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1987149514Swollman# Mathew Englander (1996-10-07) gives the following refs: 198820094Swollman# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1989283079Sedwin# c. 7 defines Yukon standard time as UTC-9.... 199020094Swollman# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1991325324Sgordon# [https://www.canlii.org/en/ca/laws/stat/rsc-1985-c-i-21/latest/rsc-1985-c-i-21.html] 199220094Swollman# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 199320094Swollman# * O.I.C. 1980/02 established DST. 199420094Swollman# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 199517200Swollman 1996283079Sedwin# From Brian Inglis (2015-04-14): 1997283079Sedwin# 1998283079Sedwin# I tried to trace the history of Yukon time and found the following 1999283079Sedwin# regulations, giving the reference title and URL if found, regulation name, 2000283079Sedwin# and relevant quote if available. Each regulation specifically revokes its 2001283079Sedwin# predecessor. The final reference is to the current Interpretation Act 2002283079Sedwin# authorizing and resulting from these regulatory changes. 2003283079Sedwin# 2004283079Sedwin# Only recent regulations were retrievable via Yukon government site search or 2005283079Sedwin# index, and only some via Canadian legal sources. Other sources used include 2006283079Sedwin# articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS 2007283079Sedwin# Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and 2008283079Sedwin# 1970 quoted below; each article includes current extracts from provincial 2009283079Sedwin# and territorial ST and DST regulations at the end, summaries and details of 2010283079Sedwin# standard times and daylight saving time at many locations across Canada, 2011283079Sedwin# with time zone maps, tables and calculations for Canadian Sunrise, Sunset, 2012283079Sedwin# and LMST; they also cover many countries and global locations, with a chart 2013283079Sedwin# and table showing current Universal Time offsets, and may be useful as 2014283079Sedwin# another source of information for 1970 and earlier. 2015283079Sedwin# 2016283079Sedwin# * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26, 2017283079Sedwin# pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS) 2018283079Sedwin# http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75: 2019283079Sedwin# Yukon Interpretation Ordinance 2020283079Sedwin# Yukon standard time is the local mean time at the one hundred and 2021283079Sedwin# thirty-fifth meridian. 2022283079Sedwin# 2023283079Sedwin# * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.; 2024283079Sedwin# JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System 2025283079Sedwin# (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1: 2026283079Sedwin# Yukon Interpretation Ordinance, 1955, Chap. 16. 2027283079Sedwin# 2028283079Sedwin# (1) Subject to this section, standard time shall be reckoned as nine 2029283079Sedwin# hours behind Greenwich Time and called Yukon Standard Time. 2030283079Sedwin# 2031283079Sedwin# (2) Notwithstanding subsection (1), the Commissioner may make regulations 2032283079Sedwin# varying the manner of reckoning standard time. 2033283079Sedwin# 2034283079Sedwin# * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance 2035283079Sedwin# http://? - no online source found 2036283079Sedwin# 2037283079Sedwin# * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC, 2038283079Sedwin# Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS) 2039283079Sedwin# http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon 2040283079Sedwin# Territory Commissioner's Order 1967-59 Interpretation Ordinance ... 2041283079Sedwin# 2042283079Sedwin# 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon 2043283079Sedwin# Territory on 27th January, 1966, is hereby revoked. 2044283079Sedwin# 2045283079Sedwin# 2. Yukon (East) Standard Time as defined by section 36 of the 2046283079Sedwin# Interpretation Ordinance from and after mid-night on the 28th day of May, 2047283079Sedwin# 1967 shall be reckoned in the same manner as Pacific Standard Time, that 2048283079Sedwin# is to say, eight hours behind Greenwich Time in the area of the Yukon 2049283079Sedwin# Territory lying east of the 138th degree longitude west. 2050283079Sedwin# 2051283079Sedwin# 3. In the remainder of the Territory, lying west of the 138th degree 2052283079Sedwin# longitude west, Yukon (West) Standard Time shall be reckoned as nine 2053283079Sedwin# hours behind Greenwich Time. 2054283079Sedwin# 2055283079Sedwin# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214 2056325324Sgordon# https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html 2057283079Sedwin# C.O. 1973/214 INTERPRETATION ACT ... 2058283079Sedwin# 2059283079Sedwin# 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby 2060283079Sedwin# revoked. 2061283079Sedwin# 2062283079Sedwin# 2. Yukon Standard Time as defined by section 36 of the Interpretation 2063283079Sedwin# Act from and after midnight on the twenty-eighth day of October, 1973 2064283079Sedwin# shall be reckoned in the same manner as Pacific Standard Time, that is 2065283079Sedwin# to say eight hours behind Greenwich Time. 2066283079Sedwin# 2067283079Sedwin# * O.I.C. 1980/02 INTERPRETATION ACT 2068283079Sedwin# http://? - no online source found 2069283079Sedwin# 2070283079Sedwin# * Yukon Daylight Saving Time, YOIC 1987/56 2071325324Sgordon# https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html 2072283079Sedwin# O.I.C. 1987/056 INTERPRETATION ACT ... 2073283079Sedwin# 2074283079Sedwin# In every year between 2075283079Sedwin# (a) two o'clock in the morning in the first Sunday in April, and 2076283079Sedwin# (b) two o'clock in the morning in the last Sunday in October, 2077283079Sedwin# Standard Time shall be reckoned as seven hours behind Greenwich Time and 2078283079Sedwin# called Yukon Daylight Saving Time. 2079283079Sedwin# ... 2080283079Sedwin# Dated ... 9th day of March, A.D., 1987. 2081283079Sedwin# 2082283079Sedwin# * Yukon Daylight Saving Time 2006, YOIC 2006/127 2083325324Sgordon# https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html 2084283079Sedwin# O.I.C. 2006/127 INTERPRETATION ACT ... 2085283079Sedwin# 2086283079Sedwin# 1. In Yukon each year the time for general purposes shall be 7 hours 2087283079Sedwin# behind Greenwich mean time during the period commencing at two o'clock 2088283079Sedwin# in the forenoon on the second Sunday of March and ending at two o'clock 2089283079Sedwin# in the forenoon on the first Sunday of November and shall be called 2090283079Sedwin# Yukon Daylight Saving Time. 2091283079Sedwin# 2092283079Sedwin# 2. Order-in-Council 1987/56 is revoked. 2093283079Sedwin# 2094283079Sedwin# 3. This order comes into force January 1, 2007. 2095283079Sedwin# 2096283079Sedwin# * Interpretation Act, RSY 2002, c 125 2097325324Sgordon# https://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html 2098283079Sedwin 209958787Sru# From Rives McDow (1999-09-04): 210058787Sru# Nunavut ... moved ... to incorporate the whole territory into one time zone. 210158787Sru# Nunavut moves to single time zone Oct. 31 2102273718Sedwin# http://www.nunatsiaq.com/nunavut/nvt90903_13.html 210358787Sru# 210458787Sru# From Antoine Leca (1999-09-06): 210558787Sru# We then need to create a new timezone for the Kitikmeot region of Nunavut 210658787Sru# to differentiate it from the Yellowknife region. 210758787Sru 210858787Sru# From Paul Eggert (1999-09-20): 210958787Sru# Basic Facts: The New Territory 2110273718Sedwin# http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html 2111270728Spluknet# (1999) reports that Pangnirtung operates on eastern time, 211258787Sru# and that Coral Harbour does not observe DST. We don't know when 211386222Swollman# Pangnirtung switched to eastern time; we'll guess 1995. 211458787Sru 211558787Sru# From Rives McDow (1999-11-08): 211658787Sru# On October 31, when the rest of Nunavut went to Central time, 211758787Sru# Pangnirtung wobbled. Here is the result of their wobble: 211858787Sru# 211958787Sru# The following businesses and organizations in Pangnirtung use Central Time: 212058787Sru# 212158787Sru# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 212258787Sru# Eastern Arctic National Parks, A & D Specialist 212358787Sru# 212458787Sru# The following businesses and organizations in Pangnirtung use Eastern Time: 212558787Sru# 212658787Sru# Hamlet office, All other businesses, Both schools, Airport operator 212758787Sru# 212858787Sru# This has made for an interesting situation there, which warranted the news. 212958787Sru# No one there that I spoke with seems concerned, or has plans to 213058787Sru# change the local methods of keeping time, as it evidently does not 213158787Sru# really interfere with any activities or make things difficult locally. 213258787Sru# They plan to celebrate New Year's turn-over twice, one hour apart, 213358787Sru# so it appears that the situation will last at least that long. 213458787Sru# The Nunavut Intergovernmental Affairs hopes that they will "come to 213558787Sru# their senses", but the locals evidently don't see any problem with 213658787Sru# the current state of affairs. 213758787Sru 213858787Sru# From Michaela Rodrigue, writing in the 2139273718Sedwin# Nunatsiaq News (1999-11-19): 2140325324Sgordon# http://www.nunatsiaqonline.ca/archives/nunavut991130/nvt91119_17.html 214158787Sru# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 214258787Sru# central - or Nunavut time - for government offices, and eastern time 214358787Sru# for municipal offices and schools.... Igloolik [was similar but then] 214458787Sru# made the switch to central time on Saturday, Nov. 6. 214558787Sru 214667578Swollman# From Paul Eggert (2000-10-02): 214767578Swollman# Matthews and Vincent (1998) say the following, but we lack histories 214867578Swollman# for these potential new Zones. 214975267Swollman# 215067578Swollman# The Canadian Forces station at Alert uses Eastern Time while the 215167578Swollman# handful of residents at the Eureka weather station [in the Central 215267578Swollman# zone] skip daylight savings. Baffin Island, which is crossed by the 215367578Swollman# Central, Eastern and Atlantic Time zones only uses Eastern Time. 215467578Swollman# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 215567578Swollman# Central Time and Southampton Island [in the Central zone] is not 215667578Swollman# required to use daylight savings. 215767578Swollman 2158325324Sgordon# From <http://www.nunatsiaqonline.ca/archives/nunavut001130/nvt21110_02.html> 2159270728Spluknet# Nunavut now has two time zones (2000-11-10): 216075267Swollman# The Nunavut government would allow its employees in Kugluktuk and 216175267Swollman# Cambridge Bay to operate on central time year-round, putting them 216275267Swollman# one hour behind the rest of Nunavut for six months during the winter. 216375267Swollman# At the end of October the two communities had rebelled against 216475267Swollman# Nunavut's unified time zone, refusing to shift to eastern time with 216575267Swollman# the rest of the territory for the winter. Cambridge Bay remained on 216675267Swollman# central time, while Kugluktuk, even farther west, reverted to 216775267Swollman# mountain time, which they had used before the advent of Nunavut's 216875267Swollman# unified time zone in 1999. 216975267Swollman# 217075267Swollman# From Rives McDow (2001-01-20), quoting the Nunavut government: 217175267Swollman# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 217275267Swollman 217375267Swollman# From Paul Eggert (2000-12-04): 217475267Swollman# Let's just keep track of the official times for now. 217575267Swollman 217675267Swollman# From Rives McDow (2001-03-07): 217775267Swollman# The premier of Nunavut has issued a ministerial statement advising 217875267Swollman# that effective 2001-04-01, the territory of Nunavut will revert 217975267Swollman# back to three time zones (mountain, central, and eastern). Of the 218075267Swollman# cities in Nunavut, Coral Harbor is the only one that I know of that 218175267Swollman# has said it will not observe dst, staying on EST year round. I'm 218275267Swollman# checking for more info, and will get back to you if I come up with 218375267Swollman# more. 218475267Swollman# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 218575267Swollman 2186149514Swollman# From Gwillim Law (2005-05-21): 2187273718Sedwin# According to ... 2188149514Swollman# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2189149514Swollman# (from a 1998 Canadian Geographic article), the de facto and de jure time 2190149514Swollman# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2191149514Swollman# round. Using Google, it's easy to find other websites that confirm this. 2192149514Swollman# I wasn't able to find how far back this time regimen goes, but since it 2193149514Swollman# predates the creation of Nunavut, it probably goes back many years.... 2194149514Swollman# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2195149514Swollman# 2196273718Sedwin# From Paul Eggert (2014-10-17): 2197149514Swollman# For lack of better information, assume that Southampton Island observed 2198273718Sedwin# daylight saving only during wartime. Gwillim Law's email also 2199273718Sedwin# mentioned maps now maintained by National Research Council Canada; 2200273718Sedwin# see above for an up-to-date link. 2201149514Swollman 2202169811Swollman# From Chris Walton (2007-03-01): 2203169811Swollman# ... the community of Resolute (located on Cornwallis Island in 2204169811Swollman# Nunavut) moved from Central Time to Eastern Time last November. 2205169811Swollman# Basically the community did not change its clocks at the end of 2206169811Swollman# daylight saving.... 2207169811Swollman# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2208163302Sru 2209226289Sedwin# From Chris Walton (2011-03-21): 2210226289Sedwin# Back in 2007 I initiated the creation of a new "zone file" for Resolute 2211226289Sedwin# Bay. Resolute Bay is a small community located about 900km north of 2212226289Sedwin# the Arctic Circle. The zone file was required because Resolute Bay had 2213226289Sedwin# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2214169811Swollman# 2215226289Sedwin# According to new information which I received last week, Resolute Bay 2216226289Sedwin# went back to using UTC-6 in the winter of 2007-2008... 2217226289Sedwin# 2218226289Sedwin# On March 11/2007 most of Canada went onto daylight saving. On March 2219226289Sedwin# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2220226289Sedwin# talked to somebody that was both knowledgeable and helpful. I was able 2221226289Sedwin# to confirm that Resolute Bay was still operating on UTC-5. It was 2222226289Sedwin# explained to me that Resolute Bay had been on the Eastern Time zone 2223226289Sedwin# (EST) in the winter, and was now back on the Central Time zone (CDT). 2224226289Sedwin# i.e. the time zone had changed twice in the last year but the clocks 2225226289Sedwin# had not moved. The residents had to know which time zone they were in 2226226289Sedwin# so they could follow the correct TV schedule... 2227226289Sedwin# 2228226289Sedwin# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2229226289Sedwin# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2230226289Sedwin# of the phone call, I decided to seek out an alternate source of 2231226289Sedwin# information. I found an e-mail address for somebody by the name of 2232226289Sedwin# Stephanie Adams whose job was listed as "Inns North Support Officer for 2233226289Sedwin# Arctic Co-operatives." I was under the impression that Stephanie lived 2234226289Sedwin# and worked in Resolute Bay... 2235226289Sedwin# 2236226289Sedwin# On March 14/2011 I phoned the hamlet office again. I was told that 2237226289Sedwin# Resolute Bay had been using Central Standard Time over the winter of 2238226289Sedwin# 2010-2011 and that the clocks had therefore been moved one hour ahead 2239226289Sedwin# on March 13/2011. The person I talked to was aware that Resolute Bay 2240226289Sedwin# had previously experimented with Eastern Standard Time but he could not 2241226289Sedwin# tell me when the practice had stopped. 2242226289Sedwin# 2243226289Sedwin# On March 17/2011 I searched the Web to find an e-mail address of 2244226289Sedwin# somebody that might be able to tell me exactly when Resolute Bay went 2245226289Sedwin# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2246226289Sedwin# used to be the mayor of Resolute Bay and he apparently owns half the 2247226289Sedwin# businesses including "South Camp Inn." This website has some info on 2248226289Sedwin# Aziz: 2249226289Sedwin# http://www.uphere.ca/node/493 2250226289Sedwin# 2251226289Sedwin# I sent Aziz an e-mail asking when Resolute Bay had stopped using 2252226289Sedwin# Eastern Standard Time. 2253226289Sedwin# 2254226289Sedwin# Aziz responded quickly with this: "hi, The time was not changed for the 2255226289Sedwin# 1 year only, the following year, the community went back to the old way 2256226289Sedwin# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2257226289Sedwin# the winter Zulu plus 6 hrs" 2258226289Sedwin# 2259226289Sedwin# This of course conflicted with everything I had ascertained in November 2008. 2260226289Sedwin# 2261226289Sedwin# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2262226289Sedwin# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2263226289Sedwin# may want to check with the weather office in Resolute Bay or do a 2264226289Sedwin# search on the weather through Env. Canada. web site" 2265226289Sedwin# 2266226289Sedwin# If I had realized the Stephanie did not live in Resolute Bay I would 2267226289Sedwin# never have contacted her. I now believe that all the information I 2268226289Sedwin# obtained in November 2008 should be ignored... 2269226289Sedwin# I apologize for reporting incorrect information in 2008. 2270169811Swollman 22712742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 227217200SwollmanRule NT_YK 1918 only - Apr 14 2:00 1:00 D 227317200SwollmanRule NT_YK 1918 only - Oct 27 2:00 0 S 227417200SwollmanRule NT_YK 1919 only - May 25 2:00 1:00 D 227517200SwollmanRule NT_YK 1919 only - Nov 1 0:00 0 S 2276121098SwollmanRule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2277121098SwollmanRule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 227817200SwollmanRule NT_YK 1945 only - Sep 30 2:00 0 S 227917200SwollmanRule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 228017200SwollmanRule NT_YK 1965 only - Oct lastSun 2:00 0 S 228117200SwollmanRule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2282158421SwollmanRule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2283158421SwollmanRule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 22842742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2285169811Swollman# aka Panniqtuuq 2286309583SglebiusZone America/Pangnirtung 0 - -00 1921 # trading post est. 2287273718Sedwin -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2288273718Sedwin -5:00 Canada E%sT 1999 Oct 31 2:00 2289273718Sedwin -6:00 Canada C%sT 2000 Oct 29 2:00 229075267Swollman -5:00 Canada E%sT 2291169811Swollman# formerly Frobisher Bay 2292309583SglebiusZone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est. 2293273718Sedwin -5:00 NT_YK E%sT 1999 Oct 31 2:00 2294273718Sedwin -6:00 Canada C%sT 2000 Oct 29 2:00 229575267Swollman -5:00 Canada E%sT 2296169811Swollman# aka Qausuittuq 2297309583SglebiusZone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded 2298273718Sedwin -6:00 NT_YK C%sT 2000 Oct 29 2:00 2299273718Sedwin -5:00 - EST 2001 Apr 1 3:00 2300273718Sedwin -6:00 Canada C%sT 2006 Oct 29 2:00 2301273718Sedwin -5:00 - EST 2007 Mar 11 3:00 2302226289Sedwin -6:00 Canada C%sT 2303169811Swollman# aka Kangiqiniq 2304309583SglebiusZone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded 2305273718Sedwin -6:00 NT_YK C%sT 2000 Oct 29 2:00 2306273718Sedwin -5:00 - EST 2001 Apr 1 3:00 230758787Sru -6:00 Canada C%sT 2308169811Swollman# aka Iqaluktuuttiaq 2309309583SglebiusZone America/Cambridge_Bay 0 - -00 1920 # trading post est.? 2310273718Sedwin -7:00 NT_YK M%sT 1999 Oct 31 2:00 2311273718Sedwin -6:00 Canada C%sT 2000 Oct 29 2:00 2312273718Sedwin -5:00 - EST 2000 Nov 5 0:00 2313273718Sedwin -6:00 - CST 2001 Apr 1 3:00 231475267Swollman -7:00 Canada M%sT 2315309583SglebiusZone America/Yellowknife 0 - -00 1935 # Yellowknife founded? 2316158421Swollman -7:00 NT_YK M%sT 1980 2317158421Swollman -7:00 Canada M%sT 2318309583SglebiusZone America/Inuvik 0 - -00 1953 # Inuvik founded 2319273718Sedwin -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2320158421Swollman -7:00 NT_YK M%sT 1980 2321158421Swollman -7:00 Canada M%sT 23222742SwollmanZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2323283079Sedwin -9:00 NT_YK Y%sT 1967 May 28 0:00 2324158421Swollman -8:00 NT_YK P%sT 1980 2325158421Swollman -8:00 Canada P%sT 232617200SwollmanZone America/Dawson -9:17:40 - LMT 1900 Aug 20 2327273718Sedwin -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2328158421Swollman -8:00 NT_YK P%sT 1980 2329158421Swollman -8:00 Canada P%sT 23302742Swollman 23318029Swollman 23322742Swollman############################################################################### 23332742Swollman 23342742Swollman# Mexico 23352742Swollman 2336279706Sedwin# From Paul Eggert (2014-12-07): 233775267Swollman# The Investigation and Analysis Service of the 233875267Swollman# Mexican Library of Congress (MLoC) has published a 233975267Swollman# history of Mexican local time (in Spanish) 2340279706Sedwin# http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm 23412742Swollman# 2342158421Swollman# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 234375267Swollman# (In all cases we go with the MLoC.) 2344158421Swollman# S&P report that Baja was at -8:00 in 1922/1923. 2345158421Swollman# S&P say the 1930 transition in Baja was 1930-11-16. 2346158421Swollman# S&P report no DST during summer 1931. 2347158421Swollman# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 23482742Swollman 234975267Swollman# From Gwillim Law (2001-02-20): 235075267Swollman# There are some other discrepancies between the Decrees page and the 235175267Swollman# tz database. I think they can best be explained by supposing that 235275267Swollman# the researchers who prepared the Decrees page failed to find some of 235375267Swollman# the relevant documents. 235475267Swollman 2355149514Swollman# From Alan Perry (1996-02-15): 235617200Swollman# A guy from our Mexico subsidiary finally found the Presidential Decree 235717200Swollman# outlining the timezone changes in Mexico. 235858787Sru# 235917200Swollman# ------------- Begin Forwarded Message ------------- 236058787Sru# 236117200Swollman# I finally got my hands on the Official Presidential Decree that sets up the 236217200Swollman# rules for the DST changes. The rules are: 236358787Sru# 236417200Swollman# 1. The country is divided in 3 timezones: 236517200Swollman# - Baja California Norte (the Mexico/BajaNorte TZ) 236617200Swollman# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 236717200Swollman# - The rest of the country (the Mexico/General TZ) 236858787Sru# 236917200Swollman# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 237017200Swollman# at 2:00 AM, the times in each zone are as follows: 237117200Swollman# BajaNorte: GMT+7 237217200Swollman# BajaSur: GMT+6 237317200Swollman# General: GMT+5 237458787Sru# 237517200Swollman# 3. The rest of the year, the times are as follows: 237617200Swollman# BajaNorte: GMT+8 237717200Swollman# BajaSur: GMT+7 237817200Swollman# General: GMT+6 237958787Sru# 238017200Swollman# The Decree was published in Mexico's Official Newspaper on January 4th. 238158787Sru# 238217200Swollman# -------------- End Forwarded Message -------------- 238317200Swollman# From Paul Eggert (1996-06-12): 238443014Swollman# For an English translation of the decree, see 2385273718Sedwin# "Diario Oficial: Time Zone Changeover" (1996-01-04). 2386273718Sedwin# http://mexico-travel.com/extra/timezone_eng.html 238714343Swollman 238843543Swollman# From Rives McDow (1998-10-08): 238943543Swollman# The State of Quintana Roo has reverted back to central STD and DST times 239043543Swollman# (i.e. UTC -0600 and -0500 as of 1998-08-02). 239143543Swollman 239258787Sru# From Rives McDow (2000-01-10): 239358787Sru# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 239458787Sru# zone 5 hours from the International Date Line, and will not observe daylight 239558787Sru# savings time so as to stay on the same time zone as the southern part of 239658787Sru# Arizona year round. 239758787Sru 2398270728Spluknet# From Jesper N��rgaard, translating 239975267Swollman# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 240075267Swollman# In Oaxaca, the 55.000 teachers from the Section 22 of the National 240175267Swollman# Syndicate of Education Workers, refuse to apply daylight saving each 240275267Swollman# year, so that the more than 10,000 schools work at normal hour the 240375267Swollman# whole year. 240475267Swollman 240575267Swollman# From Gwillim Law (2001-01-19): 240675267Swollman# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 240775267Swollman# (translated):... 240875267Swollman# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 240975267Swollman# that Summer Time will be reduced from seven to five months, starting 241075267Swollman# this year.... 2411273718Sedwin# http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 241275267Swollman# [translated], says "summer time will ... take effect on the first Sunday 241375267Swollman# in May, and end on the last Sunday of September. 241475267Swollman 241575267Swollman# From Arthur David Olson (2001-01-25): 241675267Swollman# The 2001-01-24 traditional Washington Post contained the page one 241775267Swollman# story "Timely Issue Divides Mexicans."... 241875267Swollman# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2419270728Spluknet# ... Mexico City Mayor L��pez Obrador "...is threatening to keep 242075267Swollman# Mexico City and its 20 million residents on a different time than 2421270728Spluknet# the rest of the country..." In particular, L��pez Obrador would abolish 242275267Swollman# observation of Daylight Saving Time. 242375267Swollman 242475267Swollman# Official statute published by the Energy Department 2425273718Sedwin# http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre 2426270728Spluknet# (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2427270728Spluknet# and Sonora with no DST. This was reported by Jesper N��rgaard (2001-02-03). 242875267Swollman 242975267Swollman# From Paul Eggert (2001-03-03): 243075267Swollman# 2431273718Sedwin# http://www.latimes.com/news/nation/20010303/t000018766.html 243275267Swollman# James F. Smith writes in today's LA Times 243375267Swollman# * Sonora will continue to observe standard time. 2434270728Spluknet# * Last week Mexico City's mayor Andr��s Manuel L��pez Obrador decreed that 243575267Swollman# the Federal District will not adopt DST. 243675267Swollman# * 4 of 16 district leaders announced they'll ignore the decree. 243775267Swollman# * The decree does not affect federal-controlled facilities including 243875267Swollman# the airport, banks, hospitals, and schools. 243975267Swollman# 244075267Swollman# For now we'll assume that the Federal District will bow to federal rules. 244175267Swollman 2442270728Spluknet# From Jesper N��rgaard (2001-04-01): 244375267Swollman# I found some references to the Mexican application of daylight 244475267Swollman# saving, which modifies what I had already sent you, stating earlier 244575267Swollman# that a number of northern Mexican states would go on daylight 244675267Swollman# saving. The modification reverts this to only cover Baja California 244775267Swollman# (Norte), while all other states (except Sonora, who has no daylight 244875267Swollman# saving all year) will follow the original decree of president 244975267Swollman# Vicente Fox, starting daylight saving May 6, 2001 and ending 245075267Swollman# September 30, 2001. 2451270728Spluknet# References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp> 245275267Swollman# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 245375267Swollman 245486222Swollman# From Reuters (2001-09-04): 245586222Swollman# Mexico's Supreme Court on Tuesday declared that daylight savings was 245686222Swollman# unconstitutional in Mexico City, creating the possibility the 245786222Swollman# capital will be in a different time zone from the rest of the nation 245886222Swollman# next year.... The Supreme Court's ruling takes effect at 2:00 245986222Swollman# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 246086222Swollman# standard time. "This is so residents of the Federal District are not 246186222Swollman# subject to unexpected time changes," a statement from the court said. 246286222Swollman 2463270728Spluknet# From Jesper N��rgaard Welen (2002-03-12): 246493799Swollman# ... consulting my local grocery store(!) and my coworkers, they all insisted 246593799Swollman# that a new decision had been made to reinstate US style DST in Mexico.... 246693799Swollman# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 246793799Swollman# confirms this. Sonora as usual is the only state where DST is not applied. 246893799Swollman 2469203019Sedwin# From Steffen Thorsen (2009-12-28): 2470203019Sedwin# 2471203019Sedwin# Steffen Thorsen wrote: 2472203019Sedwin# > Mexico's House of Representatives has approved a proposal for northern 2473203019Sedwin# > Mexico's border cities to share the same daylight saving schedule as 2474203019Sedwin# > the United States. 2475203019Sedwin# Now this has passed both the Congress and the Senate, so starting from 2476203019Sedwin# 2010, some border regions will be the same: 2477203019Sedwin# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2478203019Sedwin# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2479203019Sedwin# (Spanish) 2480203019Sedwin# 2481203019Sedwin# Could not find the new law text, but the proposed law text changes are here: 2482203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2483203019Sedwin# (Gaceta Parlamentaria) 2484203019Sedwin# 2485203019Sedwin# There is also a list of the votes here: 2486203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2487203019Sedwin# 2488203019Sedwin# Our page: 2489325324Sgordon# https://www.timeanddate.com/news/time/north-mexico-dst-change.html 2490203019Sedwin 2491203019Sedwin# From Arthur David Olson (2010-01-20): 2492203019Sedwin# The page 2493203019Sedwin# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2494203019Sedwin# includes this text: 2495203019Sedwin# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2496270728Spluknet# Ju��rez y Ojinaga en Chihuahua; Acu��a y Piedras Negras en Coahuila; 2497270728Spluknet# An��huac en Nuevo Le��n; y Nuevo Laredo, Reynosa y Matamoros en 2498270728Spluknet# Tamaulipas, la aplicaci��n de este horario estacional surtir�� efecto 2499270728Spluknet# desde las dos horas del segundo domingo de marzo y concluir�� a las dos 2500203019Sedwin# horas del primer domingo de noviembre. 2501203019Sedwin# En los municipios fronterizos que se encuentren ubicados en la franja 2502270728Spluknet# fronteriza norte en el territorio comprendido entre la l��nea 2503270728Spluknet# internacional y la l��nea paralela ubicada a una distancia de veinte 2504270728Spluknet# kil��metros, as�� como la Ciudad de Ensenada, Baja California, hacia el 2505270728Spluknet# interior del pa��s, la aplicaci��n de este horario estacional surtir�� 2506270728Spluknet# efecto desde las dos horas del segundo domingo de marzo y concluir�� a 2507203019Sedwin# las dos horas del primer domingo de noviembre. 2508203019Sedwin 2509279706Sedwin# From Steffen Thorsen (2014-12-08), translated by Gwillim Law: 2510279706Sedwin# The Mexican state of Quintana Roo will likely change to EST in 2015. 2511279706Sedwin# 2512279706Sedwin# http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo 2513279706Sedwin# "With this change, the time conflict that has existed between the municipios 2514279706Sedwin# of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an 2515279706Sedwin# end. The latter declared itself in rebellion 15 years ago when a time change 2516279706Sedwin# was initiated in Mexico, and since then it has refused to change its time 2517279706Sedwin# zone along with the rest of the country." 2518279706Sedwin# 2519279706Sedwin# From Steffen Thorsen (2015-01-14), translated by Gwillim Law: 2520279706Sedwin# http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html 2521279706Sedwin# "...the new time zone will come into effect at two o'clock on the first Sunday 2522279706Sedwin# of February, when we will have to advance the clock one hour from its current 2523279706Sedwin# time..." 2524280413Sedwin# Also, the new zone will not use DST. 2525279706Sedwin# 2526280413Sedwin# From Carlos Ra��l Perasso (2015-02-02): 2527280413Sedwin# The decree that modifies the Mexican Hour System Law has finally 2528280413Sedwin# been published at the Diario Oficial de la Federaci��n 2529280413Sedwin# http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015 2530280413Sedwin# It establishes 5 zones for Mexico: 2531280413Sedwin# 1- Zona Centro (Central Zone): Corresponds to longitude 90 W, 2532280413Sedwin# includes most of Mexico, excluding what's mentioned below. 2533280413Sedwin# 2- Zona Pac��fico (Pacific Zone): Longitude 105 W, includes the 2534280413Sedwin# states of Baja California Sur; Chihuahua; Nayarit (excluding Bah��a 2535280413Sedwin# de Banderas which lies in Central Zone); Sinaloa and Sonora. 2536280413Sedwin# 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the 2537280413Sedwin# state of Baja California. 2538280413Sedwin# 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state 2539280413Sedwin# of Quintana Roo. 2540280413Sedwin# 5- The islands, reefs and keys shall take their timezone from the 2541280413Sedwin# longitude they are located at. 2542279706Sedwin 25432742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 25442742SwollmanRule Mexico 1939 only - Feb 5 0:00 1:00 D 25452742SwollmanRule Mexico 1939 only - Jun 25 0:00 0 S 25462742SwollmanRule Mexico 1940 only - Dec 9 0:00 1:00 D 25472742SwollmanRule Mexico 1941 only - Apr 1 0:00 0 S 2548121098SwollmanRule Mexico 1943 only - Dec 16 0:00 1:00 W # War 25492742SwollmanRule Mexico 1944 only - May 1 0:00 0 S 25502742SwollmanRule Mexico 1950 only - Feb 12 0:00 1:00 D 25512742SwollmanRule Mexico 1950 only - Jul 30 0:00 0 S 255275267SwollmanRule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 255375267SwollmanRule Mexico 1996 2000 - Oct lastSun 2:00 0 S 255493799SwollmanRule Mexico 2001 only - May Sun>=1 2:00 1:00 D 255593799SwollmanRule Mexico 2001 only - Sep lastSun 2:00 0 S 255693799SwollmanRule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 255793799SwollmanRule Mexico 2002 max - Oct lastSun 2:00 0 S 25582742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2559270728Spluknet# Quintana Roo; represented by Canc��n 256058787SruZone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 256175267Swollman -6:00 - CST 1981 Dec 23 256243543Swollman -5:00 Mexico E%sT 1998 Aug 2 2:00 2563279706Sedwin -6:00 Mexico C%sT 2015 Feb 1 2:00 2564279706Sedwin -5:00 - EST 2565270728Spluknet# Campeche, Yucat��n; represented by M��rida 256664499SwollmanZone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 256775267Swollman -6:00 - CST 1981 Dec 23 256864499Swollman -5:00 - EST 1982 Dec 2 256964499Swollman -6:00 Mexico C%sT 2570309583Sglebius# Coahuila, Nuevo Le��n, Tamaulipas (near US border) 2571309583Sglebius# This includes the following municipalities: 2572309583Sglebius# in Coahuila: Ocampo, Acu��a, Zaragoza, Jim��nez, Piedras Negras, Nava, 2573309583Sglebius# Guerrero, Hidalgo. 2574309583Sglebius# in Nuevo Le��n: An��huac, Los Aldama. 2575309583Sglebius# in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alem��n, Camargo, 2576309583Sglebius# Gustavo D��az Ordaz, Reynosa, R��o Bravo, Valle Hermoso, Matamoros. 2577309583Sglebius# See: Inicia ma��ana Horario de Verano en zona fronteriza, El Universal, 2578309583Sglebius# 2016-03-12 2579309583Sglebius# http://www.eluniversal.com.mx/articulo/estados/2016/03/12/inicia-manana-horario-de-verano-en-zona-fronteriza 2580203019SedwinZone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2581203019Sedwin -6:00 - CST 1988 2582203019Sedwin -6:00 US C%sT 1989 2583203019Sedwin -6:00 Mexico C%sT 2010 2584203019Sedwin -6:00 US C%sT 2585309583Sglebius# Durango; Coahuila, Nuevo Le��n, Tamaulipas (away from US border) 258675267SwollmanZone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 258764499Swollman -6:00 - CST 1988 258864499Swollman -6:00 US C%sT 1989 258964499Swollman -6:00 Mexico C%sT 259043014Swollman# Central Mexico 2591273718SedwinZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 25922742Swollman -7:00 - MST 1927 Jun 10 23:00 25932742Swollman -6:00 - CST 1930 Nov 15 25942742Swollman -7:00 - MST 1931 May 1 23:00 25952742Swollman -6:00 - CST 1931 Oct 259675267Swollman -7:00 - MST 1932 Apr 1 2597273718Sedwin -6:00 Mexico C%sT 2001 Sep 30 2:00 259893799Swollman -6:00 - CST 2002 Feb 20 259993799Swollman -6:00 Mexico C%sT 2600203019Sedwin# Chihuahua (near US border) 2601309583Sglebius# This includes the municipalities of Janos, Ascensi��n, Ju��rez, Guadalupe, 2602309583Sglebius# Pr��xedis G Guerrero, Coyame del Sotol, Ojinaga, and Manuel Benavides. 2603309583Sglebius# (See the 2016-03-12 El Universal source mentioned above.) 2604273718SedwinZone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2605203019Sedwin -7:00 - MST 1927 Jun 10 23:00 2606203019Sedwin -6:00 - CST 1930 Nov 15 2607203019Sedwin -7:00 - MST 1931 May 1 23:00 2608203019Sedwin -6:00 - CST 1931 Oct 2609203019Sedwin -7:00 - MST 1932 Apr 1 2610203019Sedwin -6:00 - CST 1996 2611203019Sedwin -6:00 Mexico C%sT 1998 2612273718Sedwin -6:00 - CST 1998 Apr Sun>=1 3:00 2613203019Sedwin -7:00 Mexico M%sT 2010 2614203019Sedwin -7:00 US M%sT 2615203019Sedwin# Chihuahua (away from US border) 261658787SruZone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 261743014Swollman -7:00 - MST 1927 Jun 10 23:00 261843014Swollman -6:00 - CST 1930 Nov 15 261943014Swollman -7:00 - MST 1931 May 1 23:00 262043014Swollman -6:00 - CST 1931 Oct 262175267Swollman -7:00 - MST 1932 Apr 1 262243014Swollman -6:00 - CST 1996 262343014Swollman -6:00 Mexico C%sT 1998 2624273718Sedwin -6:00 - CST 1998 Apr Sun>=1 3:00 262543014Swollman -7:00 Mexico M%sT 262658787Sru# Sonora 262758787SruZone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 262858787Sru -7:00 - MST 1927 Jun 10 23:00 262958787Sru -6:00 - CST 1930 Nov 15 263058787Sru -7:00 - MST 1931 May 1 23:00 263158787Sru -6:00 - CST 1931 Oct 263275267Swollman -7:00 - MST 1932 Apr 1 263364499Swollman -6:00 - CST 1942 Apr 24 263458787Sru -7:00 - MST 1949 Jan 14 263558787Sru -8:00 - PST 1970 263658787Sru -7:00 Mexico M%sT 1999 263758787Sru -7:00 - MST 2638207898Sedwin 2639207898Sedwin# From Alexander Krivenyshev (2010-04-21): 2640270728Spluknet# According to news, Bah��a de Banderas (Mexican state of Nayarit) 2641207898Sedwin# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2642207898Sedwin# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2643207898Sedwin# 2644207898Sedwin# (Spanish) 2645270728Spluknet# Bah��a de Banderas homologa su horario al del centro del 2646270728Spluknet# pa��s, a partir de este domingo 2647207898Sedwin# http://www.nayarit.gob.mx/notes.asp?id=20748 2648207898Sedwin# 2649270728Spluknet# Bah��a de Banderas homologa su horario con el del Centro del 2650270728Spluknet# Pa��s 2651270728Spluknet# http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50 2652207898Sedwin# 2653207898Sedwin# (English) 2654270728Spluknet# Puerto Vallarta and Bah��a de Banderas: One Time Zone 2655207898Sedwin# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2656207898Sedwin# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2657207898Sedwin# 2658207898Sedwin# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2659270728Spluknet# will allow Bah��a de Banderas and Puerto Vallarta to share the same time 2660207898Sedwin# zone ..." 266164499Swollman# Baja California Sur, Nayarit, Sinaloa 2662207898Sedwin 2663207898Sedwin# From Arthur David Olson (2010-05-01): 2664207898Sedwin# Use "Bahia_Banderas" to keep the name to fourteen characters. 2665207898Sedwin 2666270728Spluknet# Mazatl��n 26672742SwollmanZone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 26682742Swollman -7:00 - MST 1927 Jun 10 23:00 26692742Swollman -6:00 - CST 1930 Nov 15 26702742Swollman -7:00 - MST 1931 May 1 23:00 26712742Swollman -6:00 - CST 1931 Oct 267275267Swollman -7:00 - MST 1932 Apr 1 267364499Swollman -6:00 - CST 1942 Apr 24 26742742Swollman -7:00 - MST 1949 Jan 14 26752742Swollman -8:00 - PST 1970 267614343Swollman -7:00 Mexico M%sT 2677207898Sedwin 2678270728Spluknet# Bah��a de Banderas 2679207898SedwinZone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2680207898Sedwin -7:00 - MST 1927 Jun 10 23:00 2681207898Sedwin -6:00 - CST 1930 Nov 15 2682207898Sedwin -7:00 - MST 1931 May 1 23:00 2683207898Sedwin -6:00 - CST 1931 Oct 2684207898Sedwin -7:00 - MST 1932 Apr 1 2685207898Sedwin -6:00 - CST 1942 Apr 24 2686207898Sedwin -7:00 - MST 1949 Jan 14 2687207898Sedwin -8:00 - PST 1970 2688273718Sedwin -7:00 Mexico M%sT 2010 Apr 4 2:00 2689207898Sedwin -6:00 Mexico C%sT 2690207898Sedwin 2691309583Sglebius# Baja California 26922742SwollmanZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 269375267Swollman -7:00 - MST 1924 26942742Swollman -8:00 - PST 1927 Jun 10 23:00 269575267Swollman -7:00 - MST 1930 Nov 15 269675267Swollman -8:00 - PST 1931 Apr 1 269775267Swollman -8:00 1:00 PDT 1931 Sep 30 269864499Swollman -8:00 - PST 1942 Apr 24 2699158421Swollman -8:00 1:00 PWT 1945 Aug 14 23:00u 2700158421Swollman -8:00 1:00 PPT 1945 Nov 12 # Peace 270175267Swollman -8:00 - PST 1948 Apr 5 270275267Swollman -8:00 1:00 PDT 1949 Jan 14 270375267Swollman -8:00 - PST 1954 270475267Swollman -8:00 CA P%sT 1961 270575267Swollman -8:00 - PST 1976 270614343Swollman -8:00 US P%sT 1996 270775267Swollman -8:00 Mexico P%sT 2001 270893799Swollman -8:00 US P%sT 2002 Feb 20 2709203019Sedwin -8:00 Mexico P%sT 2010 2710203019Sedwin -8:00 US P%sT 2711158421Swollman# From Paul Eggert (2006-03-22): 271275267Swollman# Formerly there was an America/Ensenada zone, which differed from 271375267Swollman# America/Tijuana only in that it did not observe DST from 1976 2714158421Swollman# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2715158421Swollman# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2716270728Spluknet# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 2717158421Swollman# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 271875267Swollman# DST-observance was a town-by-town matter back then. This concerns 271975267Swollman# data after 1970 so most likely there should be at least one Zone 272075267Swollman# other than America/Tijuana for Baja, but it's not clear yet what its 272175267Swollman# name or contents should be. 27222742Swollman# 2723309583Sglebius# From Paul Eggert (2015-10-08): 2724309583Sglebius# Formerly there was an America/Santa_Isabel zone, but this appears to 2725309583Sglebius# have come from a misreading of 2726309583Sglebius# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2727309583Sglebius# It has been moved to the 'backward' file. 2728309583Sglebius# 2729309583Sglebius# 27302742Swollman# Revillagigedo Is 27312742Swollman# no information 27322742Swollman 27332742Swollman############################################################################### 27342742Swollman 27352742Swollman# Anguilla 2736280413Sedwin# Antigua and Barbuda 2737270728Spluknet# See America/Port_of_Spain. 27382742Swollman 27392742Swollman# Bahamas 2740169811Swollman# 2741248307Sedwin# For 1899 Milne gives -5:09:29.5; round that. 2742248307Sedwin# 2743169811Swollman# From Sue Williams (2006-12-07): 2744169811Swollman# The Bahamas announced about a month ago that they plan to change their DST 2745169811Swollman# rules to sync with the U.S. starting in 2007.... 2746169811Swollman# http://www.jonesbahamas.com/?c=45&a=10412 2747169811Swollman 27482742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2749181421SedwinRule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2750181421SedwinRule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 27512742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2752248307SedwinZone America/Nassau -5:09:30 - LMT 1912 Mar 2 2753169811Swollman -5:00 Bahamas E%sT 1976 2754169811Swollman -5:00 US E%sT 27552742Swollman 27562742Swollman# Barbados 2757248307Sedwin 2758248307Sedwin# For 1899 Milne gives -3:58:29.2; round that. 2759248307Sedwin 27602742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 27612742SwollmanRule Barb 1977 only - Jun 12 2:00 1:00 D 27622742SwollmanRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 27632742SwollmanRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 27642742SwollmanRule Barb 1979 only - Sep 30 2:00 0 S 27652742SwollmanRule Barb 1980 only - Sep 25 2:00 0 S 27662742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2767273718SedwinZone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2768273718Sedwin -3:58:29 - BMT 1932 # Bridgetown Mean Time 27692742Swollman -4:00 Barb A%sT 27702742Swollman 27712742Swollman# Belize 2772158421Swollman# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 27732742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2774325324SgordonRule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 -0530 2775325324SgordonRule Belize 1919 1943 - Feb Sun>=9 0:00 0 CST 2776325324SgordonRule Belize 1973 only - Dec 5 0:00 1:00 CDT 2777325324SgordonRule Belize 1974 only - Feb 9 0:00 0 CST 2778325324SgordonRule Belize 1982 only - Dec 18 0:00 1:00 CDT 2779325324SgordonRule Belize 1983 only - Feb 12 0:00 0 CST 27802742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 27812742SwollmanZone America/Belize -5:52:48 - LMT 1912 Apr 2782325324Sgordon -6:00 Belize %s 27832742Swollman 27842742Swollman# Bermuda 2785163302Sru 2786248307Sedwin# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2787248307Sedwin# Bermuda dockyard, Ireland I; round that. 2788248307Sedwin 2789163302Sru# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2790163302Sru 2791163302Sru# Next year, however, clocks in the US will go forward on the second Sunday 2792163302Sru# in March, until the first Sunday in November. And, after the Time Zone 2793163302Sru# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2794163302Sru# Friday, the same thing will happen in Bermuda. 2795163302Sru# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2796163302Sru 27972742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2798273718SedwinZone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 2799273718Sedwin -4:00 - AST 1974 Apr 28 2:00 2800257681Sedwin -4:00 Canada A%sT 1976 2801163302Sru -4:00 US A%sT 28022742Swollman 28032742Swollman# Cayman Is 2804309583Sglebius# See America/Panama. 28052742Swollman 28062742Swollman# Costa Rica 2807248307Sedwin 2808270728Spluknet# Milne gives -5:36:13.3 as San Jos�� mean time; round to nearest. 2809248307Sedwin 28102742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 28112742SwollmanRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 28122742SwollmanRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 281320094SwollmanRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2814158421Swollman# IATA SSIM (1991-09) says the following was at 1:00; 2815158421Swollman# go with Shanks & Pottenger. 281620094SwollmanRule CR 1991 only - Jul 1 0:00 0 S 281720094SwollmanRule CR 1992 only - Mar 15 0:00 0 S 2818270728Spluknet# There are too many San Jos��s elsewhere, so we'll use 'Costa Rica'. 28192742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2820273718SedwinZone America/Costa_Rica -5:36:13 - LMT 1890 # San Jos�� 2821270728Spluknet -5:36:13 - SJMT 1921 Jan 15 # San Jos�� Mean Time 28222742Swollman -6:00 CR C%sT 28232742Swollman# Coco 28242742Swollman# no information; probably like America/Costa_Rica 28252742Swollman 28262742Swollman# Cuba 28272742Swollman 2828248307Sedwin# From Paul Eggert (2013-02-21): 2829248307Sedwin# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2830248307Sedwin# for the port, and -5:30 for meteorological observations. 2831248307Sedwin# For now, stick with Shanks & Pottenger. 2832248307Sedwin 283358787Sru# From Arthur David Olson (1999-03-29): 283458787Sru# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 283558787Sru# the Cuban National Team and the Baltimore Orioles was carried live on 283658787Sru# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 283758787Sru# During the game, play-by-play announcer Jim Hunter noted that 283858787Sru# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 283958787Sru# Time today." (The "two hour" remark referred to losing one hour of 2840270728Spluknet# sleep on 1999-03-28 - when the announcers were in Cuba as it switched 2841270728Spluknet# to DST - and one more hour on 1999-04-04 - when the announcers will have 284258787Sru# returned to Baltimore, which switches on that date.) 28432742Swollman 2844259626Sedwin# From Steffen Thorsen (2013-11-11): 2845259626Sedwin# DST start in Cuba in 2004 ... does not follow the same rules as the 2846259626Sedwin# years before. The correct date should be Sunday 2004-03-28 00:00 ... 2847259626Sedwin# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 2848259626Sedwin 2849138323Swollman# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2850138323Swollman# Cuba is not going back to standard time this year. 2851158421Swollman# From Paul Eggert (2006-03-22): 2852138323Swollman# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2853138323Swollman# says that it's due to a problem at the Antonio Guiteras 2854138323Swollman# thermoelectric plant, and says "This October there will be no return 2855138323Swollman# to normal hours (after daylight saving time)". 2856158421Swollman# For now, let's assume that it's a temporary measure. 2857138323Swollman 2858153670Swollman# From Carlos A. Carnero Delgado (2005-11-12): 2859153670Swollman# This year (just like in 2004-2005) there's no change in time zone 2860153670Swollman# adjustment in Cuba. We will stay in daylight saving time: 2861153670Swollman# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2862153670Swollman 2863270728Spluknet# From Jesper N��rgaard Welen (2006-10-21): 2864169811Swollman# An article in GRANMA INTERNACIONAL claims that Cuba will end 2865169811Swollman# the 3 years of permanent DST next weekend, see 2866169811Swollman# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2867169811Swollman# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2868270728Spluknet# watches should be set back one hour - going back to 00:00 hours - returning 2869169811Swollman# to the normal schedule.... 2870163302Sru 2871169811Swollman# From Paul Eggert (2007-03-02): 2872270728Spluknet# <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday, 2873169811Swollman# says Cuban clocks will advance at midnight on March 10. 2874169811Swollman# For lack of better information, assume Cuba will use US rules, 2875169811Swollman# except that it switches at midnight standard time as usual. 2876173319Sedwin# 2877173319Sedwin# From Steffen Thorsen (2007-10-25): 2878240457Sedwin# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2879173319Sedwin# earlier - on the last Sunday of October, just like in 2006. 2880240457Sedwin# 2881173319Sedwin# He supplied these references: 2882240457Sedwin# 2883173319Sedwin# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2884173319Sedwin# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2885240457Sedwin# 2886270728Spluknet# From Alex Krivenyshev (2007-10-25): 2887173319Sedwin# Here is also article from Granma (Cuba): 2888240457Sedwin# 2889270728Spluknet# Regir�� el Horario Normal desde el pr��ximo domingo 28 de octubre 2890173319Sedwin# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2891240457Sedwin# 2892173319Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2893169811Swollman 2894177591Sedwin# From Arthur David Olson (2008-03-09): 2895177591Sedwin# I'm in Maryland which is now observing United States Eastern Daylight 2896177591Sedwin# Time. At 9:44 local time I used RealPlayer to listen to 2897177591Sedwin# http://media.enet.cu/radioreloj 2898270728Spluknet# a Cuban information station, and heard 2899177591Sedwin# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2900177591Sedwin# indicating that Cuba is still on standard time. 2901177591Sedwin 2902177591Sedwin# From Steffen Thorsen (2008-03-12): 2903177591Sedwin# It seems that Cuba will start DST on Sunday, 2007-03-16... 2904177591Sedwin# It was announced yesterday, according to this source (in Spanish): 2905177591Sedwin# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2906177591Sedwin# 2907177591Sedwin# Some more background information is posted here: 2908325324Sgordon# https://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2909177591Sedwin# 2910177591Sedwin# The article also says that Cuba has been observing DST since 1963, 2911177591Sedwin# while Shanks (and tzdata) has 1965 as the first date (except in the 2912177591Sedwin# 1940's). Many other web pages in Cuba also claim that it has been 2913177591Sedwin# observed since 1963, but with the exception of 1970 - an exception 2914177591Sedwin# which is not present in tzdata/Shanks. So there is a chance we need to 2915177591Sedwin# change some historic records as well. 2916177591Sedwin# 2917177591Sedwin# One example: 2918177591Sedwin# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2919177591Sedwin 2920270728Spluknet# From Jesper N��rgaard Welen (2008-03-13): 2921177591Sedwin# The Cuban time change has just been confirmed on the most authoritative 2922177591Sedwin# web site, the Granma. Please check out 2923177591Sedwin# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2924177591Sedwin# 2925270728Spluknet# Basically as expected after Steffen Thorsen's information, the change 2926177591Sedwin# will take place midnight between Saturday and Sunday. 2927177591Sedwin 2928177591Sedwin# From Arthur David Olson (2008-03-12): 2929177591Sedwin# Assume Sun>=15 (third Sunday) going forward. 2930177591Sedwin 2931189923Sedwin# From Alexander Krivenyshev (2009-03-04) 2932189923Sedwin# According to the Radio Reloj - Cuba will start Daylight Saving Time on 2933189923Sedwin# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2934189923Sedwin# not on midnight March 14 / March 15 as previously thought. 2935189923Sedwin# 2936189923Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2937189923Sedwin# (in Spanish) 2938189923Sedwin 2939189923Sedwin# From Arthur David Olson (2009-03-09) 2940189923Sedwin# I listened over the Internet to 2941189923Sedwin# http://media.enet.cu/readioreloj 2942189923Sedwin# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2943270728Spluknet# the time was announced as "diez cinco" - the same time as here, indicating 2944189923Sedwin# that has indeed switched to DST. Assume second Sunday from 2009 forward. 2945189923Sedwin 2946219687Sedwin# From Steffen Thorsen (2011-03-08): 2947219687Sedwin# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2948219687Sedwin# this year. Nothing about the end date known so far (if that has 2949219687Sedwin# changed at all). 2950219687Sedwin# 2951219687Sedwin# Source: 2952219687Sedwin# http://granma.co.cu/2011/03/08/nacional/artic01.html 2953219687Sedwin# 2954219687Sedwin# Our info: 2955325324Sgordon# https://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2956226976Sedwin# 2957226976Sedwin# From Steffen Thorsen (2011-10-30) 2958240457Sedwin# Cuba will end DST two weeks later this year. Instead of going back 2959226976Sedwin# tonight, it has been delayed to 2011-11-13 at 01:00. 2960226976Sedwin# 2961226976Sedwin# One source (Spanish) 2962226976Sedwin# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2963226976Sedwin# 2964226976Sedwin# Our page: 2965325324Sgordon# https://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2966240457Sedwin# 2967240457Sedwin# From Steffen Thorsen (2012-03-01) 2968240457Sedwin# According to Radio Reloj, Cuba will start DST on Midnight between March 2969240457Sedwin# 31 and April 1. 2970240457Sedwin# 2971240457Sedwin# Radio Reloj has the following info (Spanish): 2972240457Sedwin# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2973240457Sedwin# 2974240457Sedwin# Our info on it: 2975325324Sgordon# https://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2976219687Sedwin 2977242927Sedwin# From Steffen Thorsen (2012-11-03): 2978242927Sedwin# Radio Reloj and many other sources report that Cuba is changing back 2979242927Sedwin# to standard time on 2012-11-04: 2980242927Sedwin# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2981242927Sedwin# From Paul Eggert (2012-11-03): 2982242927Sedwin# For now, assume the future rule is first Sunday in November. 2983242927Sedwin 29842742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 29852742SwollmanRule Cuba 1928 only - Jun 10 0:00 1:00 D 29862742SwollmanRule Cuba 1928 only - Oct 10 0:00 0 S 29872742SwollmanRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 29882742SwollmanRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 29892742SwollmanRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 29902742SwollmanRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 29912742SwollmanRule Cuba 1965 only - Jun 1 0:00 1:00 D 29922742SwollmanRule Cuba 1965 only - Sep 30 0:00 0 S 29932742SwollmanRule Cuba 1966 only - May 29 0:00 1:00 D 29942742SwollmanRule Cuba 1966 only - Oct 2 0:00 0 S 29952742SwollmanRule Cuba 1967 only - Apr 8 0:00 1:00 D 29962742SwollmanRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 29972742SwollmanRule Cuba 1968 only - Apr 14 0:00 1:00 D 29982742SwollmanRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 29992742SwollmanRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 30002742SwollmanRule Cuba 1972 1974 - Oct 8 0:00 0 S 30012742SwollmanRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 30022742SwollmanRule Cuba 1978 only - May 7 0:00 1:00 D 300330711SwollmanRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 30042742SwollmanRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 30052742SwollmanRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 30062742SwollmanRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 300743014SwollmanRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 300820094SwollmanRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 300943014SwollmanRule Cuba 1996 only - Oct 6 0:00s 0 S 301043014SwollmanRule Cuba 1997 only - Oct 12 0:00s 0 S 301158787SruRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 3012138323SwollmanRule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 3013259626SedwinRule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 3014259626SedwinRule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 3015226976SedwinRule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 3016177591SedwinRule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 3017189923SedwinRule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 3018219687SedwinRule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 3019219687SedwinRule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 3020226976SedwinRule Cuba 2011 only - Nov 13 0:00s 0 S 3021240457SedwinRule Cuba 2012 only - Apr 1 0:00s 1:00 D 3022242927SedwinRule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 3023240457SedwinRule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 30242742Swollman 30252742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 30262742SwollmanZone America/Havana -5:29:28 - LMT 1890 302758787Sru -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 30282742Swollman -5:00 Cuba C%sT 30292742Swollman 30302742Swollman# Dominica 3031270728Spluknet# See America/Port_of_Spain. 30322742Swollman 30332742Swollman# Dominican Republic 303475267Swollman 303575267Swollman# From Steffen Thorsen (2000-10-30): 303675267Swollman# Enrique Morales reported to me that the Dominican Republic has changed the 303775267Swollman# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 303875267Swollman# http://www.listin.com.do/antes/261000/republica/princi.html 303975267Swollman 304075267Swollman# From Paul Eggert (2000-12-04): 304175267Swollman# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 304275267Swollman 304375267Swollman# From Rives McDow (2000-12-01): 304475267Swollman# Dominican Republic changed its mind and presidential decree on Tuesday, 304575267Swollman# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 304675267Swollman# Dominican Republic will be reverting to 8 hours from the International Date 304775267Swollman# Line, and will not be using DST in the foreseeable future. The reason they 304875267Swollman# decided to use DST was to be in synch with Puerto Rico, who was also going 304975267Swollman# to implement DST. When Puerto Rico didn't implement DST, the president 305075267Swollman# decided to revert. 305175267Swollman 305275267Swollman 30532742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3054325324SgordonRule DR 1966 only - Oct 30 0:00 1:00 EDT 3055325324SgordonRule DR 1967 only - Feb 28 0:00 0 EST 3056325324SgordonRule DR 1969 1973 - Oct lastSun 0:00 0:30 -0430 3057325324SgordonRule DR 1970 only - Feb 21 0:00 0 EST 3058325324SgordonRule DR 1971 only - Jan 20 0:00 0 EST 3059325324SgordonRule DR 1972 1974 - Jan 21 0:00 0 EST 30602742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 30612742SwollmanZone America/Santo_Domingo -4:39:36 - LMT 1890 30622742Swollman -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 3063325324Sgordon -5:00 DR %s 1974 Oct 27 3064273718Sedwin -4:00 - AST 2000 Oct 29 2:00 3065273718Sedwin -5:00 US E%sT 2000 Dec 3 1:00 30662742Swollman -4:00 - AST 30672742Swollman 30682742Swollman# El Salvador 3069158421Swollman 30702742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 30712742SwollmanRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 30722742SwollmanRule Salv 1987 1988 - Sep lastSun 0:00 0 S 3073121098Swollman# There are too many San Salvadors elsewhere, so use America/El_Salvador 3074121098Swollman# instead of America/San_Salvador. 30752742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3076273718SedwinZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 30772742Swollman -6:00 Salv C%sT 30782742Swollman 30792742Swollman# Grenada 30802742Swollman# Guadeloupe 3081270728Spluknet# St Barth��lemy 3082174242Sedwin# St Martin (French part) 3083270728Spluknet# See America/Port_of_Spain. 30842742Swollman 30852742Swollman# Guatemala 3086158421Swollman# 3087158421Swollman# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 3088158421Swollman# Diario Co Latino, at 3089270728Spluknet# <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>, 3090158421Swollman# says in an article dated 2006-04-19 that the Guatemalan government had 3091158421Swollman# decided on that date to advance official time by 60 minutes, to lessen the 3092158421Swollman# impact of the elevated cost of oil.... Daylight saving time will last from 3093158421Swollman# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 3094163302Sru# From Paul Eggert (2006-06-22): 3095163302Sru# The Ministry of Energy and Mines, press release CP-15/2006 3096163302Sru# (2006-04-19), says DST ends at 24:00. See 3097273718Sedwin# http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf 3098163302Sru 30992742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 31002742SwollmanRule Guat 1973 only - Nov 25 0:00 1:00 D 31012742SwollmanRule Guat 1974 only - Feb 24 0:00 0 S 31022742SwollmanRule Guat 1983 only - May 21 0:00 1:00 D 31032742SwollmanRule Guat 1983 only - Sep 22 0:00 0 S 310420094SwollmanRule Guat 1991 only - Mar 23 0:00 1:00 D 310520094SwollmanRule Guat 1991 only - Sep 7 0:00 0 S 3106158421SwollmanRule Guat 2006 only - Apr 30 0:00 1:00 D 3107158421SwollmanRule Guat 2006 only - Oct 1 0:00 0 S 31082742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 31092742SwollmanZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 31102742Swollman -6:00 Guat C%sT 31112742Swollman 31122742Swollman# Haiti 3113149514Swollman# From Gwillim Law (2005-04-15): 3114270728Spluknet# Risto O. Nyk��nen wrote me that Haiti is now on DST. 3115270728Spluknet# I searched for confirmation, and I found a press release 3116149514Swollman# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 3117270728Spluknet# <http://www.haitianconsulate.org/time.doc>. Translated from French, it says: 3118149514Swollman# 3119149514Swollman# "The Prime Minister's Communication Office notifies the public in general 3120149514Swollman# and the press in particular that, following a decision of the Interior 3121149514Swollman# Ministry and the Territorial Collectivities [I suppose that means the 3122149514Swollman# provinces], Haiti will move to Eastern Daylight Time in the night from next 3123149514Swollman# Saturday the 2nd to Sunday the 3rd. 3124149514Swollman# 3125149514Swollman# "Consequently, the Prime Minister's Communication Office wishes to inform 3126149514Swollman# the population that the country's clocks will be set forward one hour 3127149514Swollman# starting at midnight. This provision will hold until the last Saturday in 3128149514Swollman# October 2005. 3129149514Swollman# 3130149514Swollman# "Port-au-Prince, March 31, 2005" 3131158421Swollman# 3132158421Swollman# From Steffen Thorsen (2006-04-04): 3133158421Swollman# I have been informed by users that Haiti observes DST this year like 3134158421Swollman# last year, so the current "only" rule for 2005 might be changed to a 3135158421Swollman# "max" rule or to last until 2006. (Who knows if they will observe DST 3136158421Swollman# next year or if they will extend their DST like US/Canada next year). 3137158421Swollman# 3138158421Swollman# I have found this article about it (in French): 3139158421Swollman# http://www.haitipressnetwork.com/news.cfm?articleID=7612 3140158421Swollman# 3141158421Swollman# The reason seems to be an energy crisis. 3142149514Swollman 3143169811Swollman# From Stephen Colebourne (2007-02-22): 3144169811Swollman# Some IATA info: Haiti won't be having DST in 2007. 3145158421Swollman 3146240457Sedwin# From Steffen Thorsen (2012-03-11): 3147240457Sedwin# According to several news sources, Haiti will observe DST this year, 3148240457Sedwin# apparently using the same start and end date as USA/Canada. 3149240457Sedwin# So this means they have already changed their time. 3150240457Sedwin# 3151240457Sedwin# http://www.alterpresse.org/spip.php?article12510 3152240457Sedwin# http://radiovision2000haiti.net/home/?p=13253 3153240457Sedwin# 3154240457Sedwin# From Arthur David Olson (2012-03-11): 3155240457Sedwin# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 3156240457Sedwin# 3:00 a.m. rather than the traditional Haitian jump at midnight. 3157248307Sedwin# Assume a US-style fall back as well. 3158240457Sedwin 3159248307Sedwin# From Steffen Thorsen (2013-03-10): 3160248307Sedwin# It appears that Haiti is observing DST this year as well, same rules 3161248307Sedwin# as US/Canada. They did it last year as well, and it looks like they 3162248307Sedwin# are going to observe DST every year now... 3163248307Sedwin# 3164248307Sedwin# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 3165248307Sedwin# http://www.canalplushaiti.net/?p=6714 3166248307Sedwin 3167309583Sglebius# From Steffen Thorsen (2016-03-12): 3168309583Sglebius# Jean Antoine, editor of www.haiti-reference.com informed us that Haiti 3169309583Sglebius# are not going on DST this year. Several other resources confirm this: ... 3170325324Sgordon# https://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html 3171325324Sgordon# https://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ 3172309583Sglebius# http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/ 3173309583Sglebius 3174325324Sgordon# From Steffen Thorsen (2017-03-12): 3175325324Sgordon# We have received 4 mails from different people telling that Haiti 3176325324Sgordon# has started DST again today, and this source seems to confirm that, 3177325324Sgordon# I have not been able to find a more authoritative source: 3178325324Sgordon# https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html 3179325324Sgordon 31802742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 31812742SwollmanRule Haiti 1983 only - May 8 0:00 1:00 D 31822742SwollmanRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 31832742SwollmanRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 3184158421Swollman# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 3185158421Swollman# Go with IATA. 318643014SwollmanRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 318743014SwollmanRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 3188169811SwollmanRule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 3189169811SwollmanRule Haiti 2005 2006 - Oct lastSun 0:00 0 S 3190309583SglebiusRule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D 3191309583SglebiusRule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S 3192325324SgordonRule Haiti 2017 max - Mar Sun>=8 2:00 1:00 D 3193325324SgordonRule Haiti 2017 max - Nov Sun>=1 2:00 0 S 31942742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 31952742SwollmanZone America/Port-au-Prince -4:49:20 - LMT 1890 31962742Swollman -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 31972742Swollman -5:00 Haiti E%sT 31982742Swollman 31992742Swollman# Honduras 3200158421Swollman# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 3201158421Swollman 3202158421Swollman# From Paul Eggert (2006-05-05): 3203158421Swollman# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 3204158421Swollman# saying Honduras will start using DST midnight Saturday, effective 4 3205158421Swollman# months until September. La Tribuna reported today 3206158421Swollman# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 3207163302Sru# of Honduras, refused to back down on this. 3208158421Swollman 3209270728Spluknet# From Jesper N��rgaard Welen (2006-08-08): 3210163302Sru# It seems that Honduras has returned from DST to standard time this Monday at 3211163302Sru# 00:00 hours (prolonging Sunday to 25 hours duration). 3212163302Sru# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 3213163302Sru 3214163302Sru# From Paul Eggert (2006-08-08): 3215273718Sedwin# Also see Diario El Heraldo, The country returns to standard time (2006-08-08). 3216273718Sedwin# http://www.elheraldo.hn/nota.php?nid=54941&sec=12 3217163302Sru# It mentions executive decree 18-2006. 3218163302Sru 3219163302Sru# From Steffen Thorsen (2006-08-17): 3220163302Sru# Honduras will observe DST from 2007 to 2009, exact dates are not 3221163302Sru# published, I have located this authoritative source: 3222163302Sru# http://www.presidencia.gob.hn/noticia.aspx?nId=47 3223163302Sru 3224169811Swollman# From Steffen Thorsen (2007-03-30): 3225169811Swollman# http://www.laprensahn.com/pais_nota.php?id04962=7386 3226169811Swollman# So it seems that Honduras will not enter DST this year.... 3227169811Swollman 3228158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3229158421SwollmanRule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 3230158421SwollmanRule Hond 1987 1988 - Sep lastSun 0:00 0 S 3231169811SwollmanRule Hond 2006 only - May Sun>=1 0:00 1:00 D 3232169811SwollmanRule Hond 2006 only - Aug Mon>=1 0:00 0 S 32332742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 32342742SwollmanZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3235158421Swollman -6:00 Hond C%sT 323643543Swollman# 323743543Swollman# Great Swan I ceded by US to Honduras in 1972 32382742Swollman 32392742Swollman# Jamaica 3240257681Sedwin# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3241257681Sedwin# unspecified official document, and says "This time is used throughout the 3242257681Sedwin# island". Go with Milne. Round to the nearest second as required by zic. 3243273718Sedwin# 3244273718Sedwin# Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but 3245273718Sedwin# Lance Neita writes that Prime Minister Michael Manley decreed it January 5. 3246273718Sedwin# Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that 3247273718Sedwin# Manley's supporters associated this act with Manley's nickname "Joshua" 3248273718Sedwin# (recall that in the Bible the sun stood still at Joshua's request), 3249273718Sedwin# and with the Rod of Correction which Manley said he had received from 3250273718Sedwin# Haile Selassie, Emperor of Ethiopia. See: 3251273718Sedwin# Neita L. The politician in all of us. Jamaica Observer 2014-09-20 3252273718Sedwin# http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 3253273718Sedwin# 32542742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3255273718SedwinZone America/Jamaica -5:07:11 - LMT 1890 # Kingston 3256257681Sedwin -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3257273718Sedwin -5:00 - EST 1974 325820094Swollman -5:00 US E%sT 1984 325920094Swollman -5:00 - EST 32602742Swollman 32612742Swollman# Martinique 32622742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3263273718SedwinZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 3264273718Sedwin -4:04:20 - FFMT 1911 May # Fort-de-France MT 32652742Swollman -4:00 - AST 1980 Apr 6 32662742Swollman -4:00 1:00 ADT 1980 Sep 28 32672742Swollman -4:00 - AST 32682742Swollman 32692742Swollman# Montserrat 3270270728Spluknet# See America/Port_of_Spain. 32712742Swollman 32722742Swollman# Nicaragua 327343543Swollman# 3274158421Swollman# This uses Shanks & Pottenger for times before 2005. 327543543Swollman# 3276149514Swollman# From Steffen Thorsen (2005-04-12): 3277149514Swollman# I've got reports from 8 different people that Nicaragua just started 3278149514Swollman# DST on Sunday 2005-04-10, in order to save energy because of 3279149514Swollman# expensive petroleum. The exact end date for DST is not yet 3280149514Swollman# announced, only "September" but some sites also say "mid-September". 3281149514Swollman# Some background information is available on the President's official site: 3282149514Swollman# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3283149514Swollman# The Decree, no 23-2005 is available here: 3284149514Swollman# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%20en%20una%20hora%20en%20todo%20el%20territorio%20nacional%20apartir%20de%20las%2024horas%20del%2009%20de%20Abril.pdf 3285149514Swollman# 3286149514Swollman# From Paul Eggert (2005-05-01): 3287149514Swollman# The decree doesn't say anything about daylight saving, but for now let's 3288158421Swollman# assume that it is daylight saving.... 3289149514Swollman# 3290149514Swollman# From Gwillim Law (2005-04-21): 3291149514Swollman# The Associated Press story on the time change, which can be found at 3292149514Swollman# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3293273718Sedwin# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3294149514Swollman# time that a change of clocks was applied to save energy was in the year 2000 3295270728Spluknet# during the Arnoldo Alem��n administration."... 3296149514Swollman# The northamerica file says that Nicaragua has been on UTC-6 continuously 3297149514Swollman# since December 1998. I wasn't able to find any details of Nicaraguan time 3298149514Swollman# changes in 2000. Perhaps a note could be added to the northamerica file, to 3299149514Swollman# the effect that we have indirect evidence that DST was observed in 2000. 3300149514Swollman# 3301270728Spluknet# From Jesper N��rgaard Welen (2005-11-02): 3302153670Swollman# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3303153670Swollman# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3304153670Swollman# (2005-09-26) 3305153670Swollman# 3306270728Spluknet# From Jesper N��rgaard Welen (2006-05-05): 3307158421Swollman# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3308158421Swollman# (my informal translation) 3309270728Spluknet# By order of the president of the republic, Enrique Bola��os, Nicaragua 3310158421Swollman# advanced by sixty minutes their official time, yesterday at 2 in the 3311270728Spluknet# morning, and will stay that way until 30th of September. 3312158421Swollman# 3313270728Spluknet# From Jesper N��rgaard Welen (2006-09-30): 3314163302Sru# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3315163302Sru# My informal translation runs: 3316163302Sru# The natural sun time is restored in all the national territory, in that the 3317163302Sru# time is returned one hour at 01:00 am of October 1 of 2006. 3318163302Sru# 33192742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 33202742SwollmanRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 33212742SwollmanRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3322149514SwollmanRule Nic 2005 only - Apr 10 0:00 1:00 D 3323163302SruRule Nic 2005 only - Oct Sun>=1 0:00 0 S 3324158421SwollmanRule Nic 2006 only - Apr 30 2:00 1:00 D 3325163302SruRule Nic 2006 only - Oct Sun>=1 1:00 0 S 33262742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 33272742SwollmanZone America/Managua -5:45:08 - LMT 1890 332886222Swollman -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 33292742Swollman -6:00 - CST 1973 May 33302742Swollman -5:00 - EST 1975 Feb 16 3331273718Sedwin -6:00 Nic C%sT 1992 Jan 1 4:00 3332158421Swollman -5:00 - EST 1992 Sep 24 3333158421Swollman -6:00 - CST 1993 3334158421Swollman -5:00 - EST 1997 3335149514Swollman -6:00 Nic C%sT 33362742Swollman 33372742Swollman# Panama 33382742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 33392742SwollmanZone America/Panama -5:18:08 - LMT 1890 3340273718Sedwin -5:19:36 - CMT 1908 Apr 22 # Col��n Mean Time 33412742Swollman -5:00 - EST 3342309583SglebiusLink America/Panama America/Cayman 33432742Swollman 33442742Swollman# Puerto Rico 3345257681Sedwin# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 33462742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3347273718SedwinZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 33482742Swollman -4:00 - AST 1942 May 3 3349158421Swollman -4:00 US A%sT 1946 33502742Swollman -4:00 - AST 33512742Swollman 33522742Swollman# St Kitts-Nevis 33532742Swollman# St Lucia 3354270728Spluknet# See America/Port_of_Spain. 33552742Swollman 33562742Swollman# St Pierre and Miquelon 3357257681Sedwin# There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 33582742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3359273718SedwinZone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 33602742Swollman -4:00 - AST 1980 May 3361325324Sgordon -3:00 - -03 1987 3362325324Sgordon -3:00 Canada -03/-02 33632742Swollman 33642742Swollman# St Vincent and the Grenadines 3365270728Spluknet# See America/Port_of_Spain. 33662742Swollman 33672742Swollman# Turks and Caicos 3368169811Swollman# 3369169811Swollman# From Chris Dunn in 3370325324Sgordon# https://bugs.debian.org/415007 3371169811Swollman# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3372169811Swollman# daylight saving dates for time changes have been adjusted to match 3373169811Swollman# the recent U.S. change of dates. 3374169811Swollman# 3375169811Swollman# From Brian Inglis (2007-04-28): 3376169811Swollman# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3377169811Swollman# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3378169811Swollman# rows before that there is an out of date entry for Oct: 3379169811Swollman# "Eastern Standard Times Begins 2007 3380169811Swollman# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3381169811Swollman# indicating that the normal ET rules are followed. 3382169811Swollman# 3383273718Sedwin# From Paul Eggert (2014-08-19): 3384309583Sglebius# The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See: 3385273718Sedwin# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm 3386274559Sedwin# Model this as a switch from EST/EDT to AST ... 3387274559Sedwin# From Chris Walton (2014-11-04): 3388274559Sedwin# ... the TCI government appears to have delayed the switch to 3389274559Sedwin# "permanent daylight saving time" by one year.... 3390274559Sedwin# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm 3391169811Swollman# 3392325324Sgordon# From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen: 3393325324Sgordon# ... agreed to the reintroduction in TCI of Daylight Saving Time (DST) 3394325324Sgordon# during the summer months and Standard Time, also known as Local 3395325324Sgordon# Time, during the winter months with effect from April 2018 ... 3396325324Sgordon# https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3 3397325324Sgordon# 3398325324Sgordon# From Paul Eggert (2017-08-26): 3399325324Sgordon# The date of effect of the spring 2018 change appears to be March 11, 3400325324Sgordon# which makes more sense. See: Hamilton D. Time change back 3401325324Sgordon# by March 2018 for TCI. Magnetic Media. 2017-08-25. 3402325324Sgordon# http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/ 3403325324Sgordon# 34042742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 34052742SwollmanZone America/Grand_Turk -4:44:32 - LMT 1890 3406273718Sedwin -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3407273718Sedwin -5:00 - EST 1979 3408274559Sedwin -5:00 US E%sT 2015 Nov Sun>=1 2:00 3409325324Sgordon -4:00 - AST 2018 Mar 11 3:00 3410325324Sgordon -5:00 US E%sT 34118029Swollman 341214343Swollman# British Virgin Is 341314343Swollman# Virgin Is 3414270728Spluknet# See America/Port_of_Spain. 3415270728Spluknet 3416270728Spluknet 3417270728Spluknet# Local Variables: 3418270728Spluknet# coding: utf-8 3419270728Spluknet# End: 3420