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 6309568Sglebius# 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 8309568Sglebius# tz@iana.org for general use in the future). For more, please see 9309568Sglebius# 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). 23257682Sedwin# 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 28309568Sglebius# From Paul Eggert (2016-09-21): 29309568Sglebius# Dowd's proposal left many details unresolved, such as where to draw 30309568Sglebius# lines between time zones. The key individual who made time zones 31309568Sglebius# work in the US was William Frederick Allen - railway engineer, 32309568Sglebius# managing editor of the Travelers' Guide, and secretary of the 33309568Sglebius# General Time Convention, a railway standardization group. Allen 34309568Sglebius# spent months in dialogs with scientific and railway leaders, 35309568Sglebius# developed a workable plan to institute time zones, and presented it 36309568Sglebius# to the General Time Convention on 1883-04-11, saying that his plan 37309568Sglebius# meant "local time would be practically abolished" - a plus for 38309568Sglebius# railway scheduling. By the next convention on 1883-10-11 nearly all 39309568Sglebius# railroads had agreed and it took effect on 1883-11-18 at 12:00. 40309568Sglebius# That Sunday was called the "day of two noons", as the eastern parts 41309568Sglebius# of the new zones observed noon twice. Allen witnessed the 42309568Sglebius# transition in New York City, writing: 43309568Sglebius# 44309568Sglebius# I heard the bells of St. Paul's strike on the old time. Four 45309568Sglebius# minutes later, obedient to the electrical signal from the Naval 46309568Sglebius# Observatory ... the time-ball made its rapid descent, the chimes 47309568Sglebius# of old Trinity rang twelve measured strokes, and local time was 48309568Sglebius# abandoned, probably forever. 49309568Sglebius# 50309568Sglebius# Most of the US soon followed suit. See: 51309568Sglebius# Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56. 52309568Sglebius# http://dx.doi.org/10.2307/3105430 53309568Sglebius 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 67257682Sedwin# in his whimsical essay "An Economical Project for Diminishing the Cost 68257682Sedwin# 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# 82273438Sdelphij# -- 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 86273438Sdelphij# Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint 87309568Sglebius# (Carnegie Library of Pittsburgh, 1927). 88309568Sglebius# 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." 107309568Sglebius# An AltaVista search turned up: 108309568Sglebius# 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." 111273438Sdelphij# (August 1945) by way of confirmation. 11267578Swollman 113149514Swollman# From Joseph Gallant citing 11467578Swollman# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 11567578Swollman# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 11686222Swollman# to switch to London for Attlee's address, but the American people 11767578Swollman# never got to hear his speech live. According to one press account, 11867578Swollman# CBS' Bob Trout was first to announce the word of Japan's surrender, 11967578Swollman# but a few seconds later, NBC, ABC and Mutual also flashed the word 12067578Swollman# of surrender, all of whom interrupting the bells of Big Ben in 12186222Swollman# London which were to precede Mr. Attlee's speech. 12267578Swollman 123114173Swollman# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 124114173Swollman# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 125114173Swollman# 126114173Swollman# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 127114173Swollman# Any announcement from Asia would reach St. John's New York newsroom on a 128114173Swollman# wire service teletype machine, which had prescribed signals for major news. 129114173Swollman# Associated Press, for example, would ring five bells before spewing out 130114173Swollman# typed copy of an important story, and 10 bells for news "of transcendental 131114173Swollman# importance." 132114173Swollman# 133114173Swollman# On Aug. 14, stalling while talking steadily into the NBC networks' open 134114173Swollman# microphone, St. John heard five bells and waited only to hear a sixth bell, 135114173Swollman# before announcing confidently: "Ladies and gentlemen, World War II is over. 136114173Swollman# The Japanese have agreed to our surrender terms." 137114173Swollman# 138114173Swollman# He had scored a 20-second scoop on other broadcasters. 139114173Swollman 140149590Swollman# From Arthur David Olson (2005-08-22): 141149590Swollman# Paul has been careful to use the "US" rules only in those locations 142149590Swollman# that are part of the United States; this reflects the real scope of 143149590Swollman# U.S. government action. So even though the "US" rules have changed 144149590Swollman# in the latest release, other countries won't be affected. 145149590Swollman 1462742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 14775267SwollmanRule US 1918 1919 - Mar lastSun 2:00 1:00 D 1482742SwollmanRule US 1918 1919 - Oct lastSun 2:00 0 S 1492742SwollmanRule US 1942 only - Feb 9 2:00 1:00 W # War 15067578SwollmanRule US 1945 only - Aug 14 23:00u 1:00 P # Peace 151309568SglebiusRule US 1945 only - Sep lastSun 2:00 0 S 152149514SwollmanRule US 1967 2006 - Oct lastSun 2:00 0 S 1532742SwollmanRule US 1967 1973 - Apr lastSun 2:00 1:00 D 1542742SwollmanRule US 1974 only - Jan 6 2:00 1:00 D 1552742SwollmanRule US 1975 only - Feb 23 2:00 1:00 D 1562742SwollmanRule US 1976 1986 - Apr lastSun 2:00 1:00 D 157149514SwollmanRule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 158149514SwollmanRule US 2007 max - Mar Sun>=8 2:00 1:00 D 159149514SwollmanRule US 2007 max - Nov Sun>=1 2:00 0 S 1602742Swollman 161153761Swollman# From Arthur David Olson, 2005-12-19 162153761Swollman# We generate the files specified below to guard against old files with 163153761Swollman# obsolete information being left in the time zone binary directory. 164153761Swollman# We limit the list to names that have appeared in previous versions of 165153761Swollman# this time zone package. 166153761Swollman# We do these as separate Zones rather than as Links to avoid problems if 167153761Swollman# a particular place changes whether it observes DST. 168153761Swollman# We put these specifications here in the northamerica file both to 169153761Swollman# increase the chances that they'll actually get compiled and to 170153761Swollman# avoid the need to duplicate the US rules in another file. 171153761Swollman 172153761Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 173153761SwollmanZone EST -5:00 - EST 174153761SwollmanZone MST -7:00 - MST 175153761SwollmanZone HST -10:00 - HST 176153761SwollmanZone EST5EDT -5:00 US E%sT 177153761SwollmanZone CST6CDT -6:00 US C%sT 178153761SwollmanZone MST7MDT -7:00 US M%sT 179153761SwollmanZone PST8PDT -8:00 US P%sT 180153761Swollman 18119878Swollman# From Bob Devine (1988-01-28): 1822742Swollman# ...Alaska (and Hawaii) had the timezone names changed in 1967. 1832742Swollman# old new 1842742Swollman# Pacific Standard Time(PST) -same- 1852742Swollman# Yukon Standard Time(YST) -same- 1862742Swollman# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 1872742Swollman# Nome Standard Time (NT) Bering Standard Time (BST) 1882742Swollman# 1892742Swollman# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 1902742Swollman# The YST zone now covers nearly all of the state, AHST just part 1912742Swollman# of the Aleutian islands. No DST. 1922742Swollman 19314343Swollman# From Paul Eggert (1995-12-19): 194257682Sedwin# The tables below use 'NST', not 'NT', for Nome Standard Time. 195257682Sedwin# I invented 'CAWT' for Central Alaska War Time. 19614343Swollman 19719878Swollman# From U. S. Naval Observatory (1989-01-19): 1982742Swollman# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 1992742Swollman# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 2002742Swollman# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 2012742Swollman# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 2022742Swollman# USA MOUNTAIN 7 H BEHIND UTC DENVER 2032742Swollman# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 2042742Swollman# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 2052742Swollman# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 2062742Swollman# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 2072742Swollman# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 2082742Swollman# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 209273438Sdelphij# USA " 9 H BEHIND UTC APR 3 - OCT 30 2102742Swollman# USA HAWAII 10 H BEHIND UTC 2112742Swollman# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 2122742Swollman 21319878Swollman# From Arthur David Olson (1989-01-21): 2142742Swollman# The above dates are for 1988. 2152742Swollman# Note the "AKST" and "AKDT" abbreviations, the claim that there's 2162742Swollman# no DST in Samoa, and the claim that there is DST in Alaska and the 2172742Swollman# Aleutians. 2182742Swollman 21919878Swollman# From Arthur David Olson (1988-02-13): 2202742Swollman# Legal standard time zone names, from United States Code (1982 Edition and 2212742Swollman# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 22219878Swollman# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 2232742Swollman# took effect), as explained in sections 263 and 261: 2242742Swollman# (none) 2252742Swollman# United States standard eastern time 2262742Swollman# United States standard mountain time 2272742Swollman# United States standard central time 2282742Swollman# United States standard Pacific time 2292742Swollman# (none) 2302742Swollman# United States standard Alaska time 2312742Swollman# (none) 23219878Swollman# Next, names from 1967-04-01 until 1983-11-30 (the date for 2332742Swollman# public law 98-181): 2342742Swollman# Atlantic standard time 2352742Swollman# eastern standard time 2362742Swollman# central standard time 2372742Swollman# mountain standard time 2382742Swollman# Pacific standard time 2392742Swollman# Yukon standard time 2402742Swollman# Alaska-Hawaii standard time 2412742Swollman# Bering standard time 24219878Swollman# And after 1983-11-30: 2432742Swollman# Atlantic standard time 2442742Swollman# eastern standard time 2452742Swollman# central standard time 2462742Swollman# mountain standard time 2472742Swollman# Pacific standard time 2482742Swollman# Alaska standard time 2492742Swollman# Hawaii-Aleutian standard time 2502742Swollman# Samoa standard time 2512742Swollman# The law doesn't give abbreviations. 25214343Swollman# 25375267Swollman# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 254309568Sglebius# Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time" 255309568Sglebius# for time in Guam and the Northern Marianas. See the file "australasia". 256309568Sglebius# 257309568Sglebius# From Paul Eggert (2015-04-17): 258309568Sglebius# HST and HDT are standardized abbreviations for Hawaii-Aleutian 259309568Sglebius# standard and daylight times. See section 9.47 (p 234) of the 260309568Sglebius# U.S. Government Printing Office Style Manual (2008) 261309568Sglebius# http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf 262158421Swollman 263149514Swollman# From Arthur David Olson, 2005-08-09 264149514Swollman# The following was signed into law on 2005-08-08. 265149514Swollman# 266149514Swollman# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 267273438Sdelphij# (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 268149514Swollman# U.S.C. 260a(a)) is amended-- 269273438Sdelphij# (1) by striking "first Sunday of April" and inserting "second 270273438Sdelphij# Sunday of March"; and 271273438Sdelphij# (2) by striking "last Sunday of October" and inserting "first 272149514Swollman# Sunday of November'. 273273438Sdelphij# (b) Effective Date.--Subsection (a) shall take effect 1 year after the 274149514Swollman# date of enactment of this Act or March 1, 2007, whichever is later. 275273438Sdelphij# (c) Report to Congress.--Not later than 9 months after the effective 276149514Swollman# date stated in subsection (b), the Secretary shall report to Congress 277149514Swollman# on the impact of this section on energy consumption in the United 278149514Swollman# States. 279273438Sdelphij# (d) Right to Revert.--Congress retains the right to revert the 280149514Swollman# Daylight Saving Time back to the 2005 time schedules once the 281149514Swollman# Department study is complete. 2822742Swollman 28386222Swollman# US eastern time, represented by New York 28475267Swollman 28567578Swollman# Connecticut, Delaware, District of Columbia, most of Florida, 286149590Swollman# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 287149590Swollman# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 288114173Swollman# New Hampshire, New Jersey, New York, North Carolina, Ohio, 289114173Swollman# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 290114173Swollman# Vermont, Virginia, West Virginia 29167578Swollman 292149514Swollman# From Dave Cantor (2004-11-02): 293149514Swollman# Early this summer I had the occasion to visit the Mount Washington 294149514Swollman# Observatory weather station atop (of course!) Mount Washington [, NH].... 295149514Swollman# One of the staff members said that the station was on Eastern Standard Time 296149514Swollman# and didn't change their clocks for Daylight Saving ... so that their 297149514Swollman# reports will always have times which are 5 hours behind UTC. 298149514Swollman 299153670Swollman# From Paul Eggert (2005-08-26): 300153670Swollman# According to today's Huntsville Times 301309568Sglebius# http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 302153670Swollman# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 303153670Swollman# in Russell County, Lanett in Chambers County and some towns in Lee County, 304153670Swollman# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 305153670Swollman# Roberts, city administrator in Phenix City. as saying "We are in the Central 306153670Swollman# time zone, but we do go by the Eastern time zone because so many people work 307158421Swollman# in Columbus." 308153670Swollman 309309568Sglebius# From Paul Eggert (2014-09-06): 310309568Sglebius# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 311309568Sglebius# says that New York City Hall time was 3 minutes 58.4 seconds fast of 312309568Sglebius# Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the 313309568Sglebius# nearest second. 314309568Sglebius 31514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 31614343SwollmanRule NYC 1920 only - Mar lastSun 2:00 1:00 D 31714343SwollmanRule NYC 1920 only - Oct lastSun 2:00 0 S 31814343SwollmanRule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 31914343SwollmanRule NYC 1921 1954 - Sep lastSun 2:00 0 S 32014343SwollmanRule NYC 1955 1966 - Oct lastSun 2:00 0 S 32114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 322149514SwollmanZone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 32314343Swollman -5:00 US E%sT 1920 32414343Swollman -5:00 NYC E%sT 1942 32514343Swollman -5:00 US E%sT 1946 32614343Swollman -5:00 NYC E%sT 1967 32714343Swollman -5:00 US E%sT 3282742Swollman 32986222Swollman# US central time, represented by Chicago 33067578Swollman 331136638Swollman# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 332136638Swollman# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 333136638Swollman# Washington counties), Illinois, western Indiana 334114173Swollman# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 335114173Swollman# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 336114173Swollman# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 337114173Swollman# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 338114173Swollman# western Tennessee, most of Texas, Wisconsin 33967578Swollman 340158421Swollman# From Larry M. Smith (2006-04-26) re Wisconsin: 341158421Swollman# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 342158421Swollman# is currently enforced at the 01:00 time of change. Because the local 343158421Swollman# "bar time" in the state corresponds to 02:00, a number of citations 344158421Swollman# are issued for the "sale of class 'B' alcohol after prohibited 345158421Swollman# hours" within the deviated hour of this change every year.... 346169811Swollman# 347169811Swollman# From Douglas R. Bomberg (2007-03-12): 348169811Swollman# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 349169811Swollman# Statue 175 closer in synch with the US Congress' intent.... 350169811Swollman# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 351158421Swollman 352309568Sglebius# From an email administrator of the City of Fort Pierre, SD (2015-12-21): 353309568Sglebius# Fort Pierre is technically located in the Mountain time zone as is 354309568Sglebius# the rest of Stanley County. Most of Stanley County and Fort Pierre 355309568Sglebius# uses the Central time zone due to doing most of their business in 356309568Sglebius# Pierre so it simplifies schedules. I have lived in Stanley County 357309568Sglebius# all my life and it has been that way since I can remember. (43 years!) 358309568Sglebius# 359309568Sglebius# From Paul Eggert (2015-12-25): 360309568Sglebius# Assume this practice predates 1970, so Fort Pierre can use America/Chicago. 361309568Sglebius 36214343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 36314343SwollmanRule Chicago 1920 only - Jun 13 2:00 1:00 D 36414343SwollmanRule Chicago 1920 1921 - Oct lastSun 2:00 0 S 36514343SwollmanRule Chicago 1921 only - Mar lastSun 2:00 1:00 D 36614343SwollmanRule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 36714343SwollmanRule Chicago 1922 1954 - Sep lastSun 2:00 0 S 36814343SwollmanRule Chicago 1955 1966 - Oct lastSun 2:00 0 S 36914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 370149514SwollmanZone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 37114343Swollman -6:00 US C%sT 1920 372309568Sglebius -6:00 Chicago C%sT 1936 Mar 1 2:00 373309568Sglebius -5:00 - EST 1936 Nov 15 2:00 37414343Swollman -6:00 Chicago C%sT 1942 37514343Swollman -6:00 US C%sT 1946 37614343Swollman -6:00 Chicago C%sT 1967 37714343Swollman -6:00 US C%sT 37886222Swollman# Oliver County, ND switched from mountain to central time on 1992-10-25. 379149514SwollmanZone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 380309568Sglebius -7:00 US M%sT 1992 Oct 25 2:00 38186222Swollman -6:00 US C%sT 382158421Swollman# Morton County, ND, switched from mountain to central time on 383158421Swollman# 2003-10-26, except for the area around Mandan which was already central time. 384158421Swollman# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 385158421Swollman# Officially this switch also included part of Sioux County, and 386158421Swollman# Jones, Mellette, and Todd Counties in South Dakota; 387158421Swollman# but in practice these other counties were already observing central time. 388158421Swollman# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 389309568SglebiusZone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 390309568Sglebius -7:00 US M%sT 2003 Oct 26 2:00 391158421Swollman -6:00 US C%sT 3922742Swollman 393219149Sedwin# From Josh Findley (2011-01-21): 394219149Sedwin# ...it appears that Mercer County, North Dakota, changed from the 395219149Sedwin# mountain time zone to the central time zone at the last transition from 396219149Sedwin# daylight-saving to standard time (on Nov. 7, 2010): 397219149Sedwin# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 398219149Sedwin# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 399219149Sedwin 400219149Sedwin# From Andy Lipscomb (2011-01-24): 401219149Sedwin# ...according to the Census Bureau, the largest city is Beulah (although 402219149Sedwin# it's commonly referred to as Beulah-Hazen, with Hazen being the next 403219149Sedwin# largest city in Mercer County). Google Maps places Beulah's city hall 404273438Sdelphij# at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset 405273438Sdelphij# of 6h47'07". 406219149Sedwin 407309568SglebiusZone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 408309568Sglebius -7:00 US M%sT 2010 Nov 7 2:00 409219149Sedwin -6:00 US C%sT 410219149Sedwin 41186222Swollman# US mountain time, represented by Denver 41267578Swollman# 413136638Swollman# Colorado, far western Kansas, Montana, western 41486222Swollman# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 415171948Sedwin# New Mexico, southwestern North Dakota, 41675267Swollman# western South Dakota, far western Texas (El Paso County, Hudspeth County, 41775267Swollman# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 41867578Swollman# 41914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 42014343SwollmanRule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 42114343SwollmanRule Denver 1920 only - Oct lastSun 2:00 0 S 42214343SwollmanRule Denver 1921 only - May 22 2:00 0 S 42314343SwollmanRule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 42414343SwollmanRule Denver 1965 1966 - Oct lastSun 2:00 0 S 4252742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 426149514SwollmanZone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 42715309Swollman -7:00 US M%sT 1920 42815309Swollman -7:00 Denver M%sT 1942 42915309Swollman -7:00 US M%sT 1946 43015309Swollman -7:00 Denver M%sT 1967 43115309Swollman -7:00 US M%sT 4322742Swollman 43314343Swollman# US Pacific time, represented by Los Angeles 43467578Swollman# 435136638Swollman# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 436263042Sedwin# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 437263042Sedwin# north of the Salmon River, and the towns of Burgdorf and Warren), 438263042Sedwin# Nevada (except West Wendover), Oregon (except the northern 3/4 of 439263042Sedwin# Malheur county), and Washington 440309568Sglebius 441309568Sglebius# From Paul Eggert (2016-08-20): 442309568Sglebius# In early February 1948, in response to California's electricity shortage, 443309568Sglebius# PG&E changed power frequency from 60 to 59.5 Hz during daylight hours, 444309568Sglebius# causing electric clocks to lose six minutes per day. (This did not change 445309568Sglebius# legal time, and is not part of the data here.) See: 446309568Sglebius# Ross SA. An energy crisis from the past: Northern California in 1948. 447309568Sglebius# Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, 448309568Sglebius# 1973-11. http://escholarship.org/uc/item/8x22k30c 44967578Swollman# 450309568Sglebius# In another measure to save electricity, DST was instituted from 1948-03-14 451309568Sglebius# at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move 452309568Sglebius# the fallback transition earlier. See pages 3-4 of: 453309568Sglebius# http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf 454309568Sglebius# 455309568Sglebius# In response: 456309568Sglebius# 457309568Sglebius# Governor Warren received a torrent of objecting mail, and it is not too much 458309568Sglebius# to speculate that the objections to Daylight Saving Time were one important 459309568Sglebius# factor in the defeat of the Dewey-Warren Presidential ticket in California. 460309568Sglebius# -- Ross, p 25 461309568Sglebius# 462309568Sglebius# On December 8 the governor exercised the option, setting the date to January 1 463309568Sglebius# (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01). 464309568Sglebius# 465309568Sglebius# Despite the controversy, in 1949 California voters approved Proposition 12, 466309568Sglebius# which established DST from April's last Sunday at 01:00 until September's 467309568Sglebius# last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed 468309568Sglebius# the fall-back date to October's last Sunday. See: 469309568Sglebius# http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props 470309568Sglebius# http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props 471309568Sglebius# 47214343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 473309568SglebiusRule CA 1948 only - Mar 14 2:01 1:00 D 47414343SwollmanRule CA 1949 only - Jan 1 2:00 0 S 475309568SglebiusRule CA 1950 1966 - Apr lastSun 1:00 1:00 D 47614343SwollmanRule CA 1950 1961 - Sep lastSun 2:00 0 S 47714343SwollmanRule CA 1962 1966 - Oct lastSun 2:00 0 S 47814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 479149514SwollmanZone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 48014343Swollman -8:00 US P%sT 1946 48114343Swollman -8:00 CA P%sT 1967 48214343Swollman -8:00 US P%sT 4838029Swollman 48414343Swollman# Alaska 48514343Swollman# AK%sT is the modern abbreviation for -9:00 per USNO. 48614343Swollman# 48786222Swollman# From Paul Eggert (2001-05-30): 48814343Swollman# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 48919878Swollman# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 49075267Swollman# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 49175267Swollman# also a Friday. Include only the time zone part of this transition, 49275267Swollman# ignoring the switch from Julian to Gregorian, since we can't represent 49375267Swollman# the Julian calendar. 49414343Swollman# 49586222Swollman# As far as we know, none of the exact locations mentioned below were 49686222Swollman# permanently inhabited in 1867 by anyone using either calendar. 49786222Swollman# (Yakutat was colonized by the Russians in 1799, but the settlement 49886222Swollman# was destroyed in 1805 by a Yakutat-kon war party.) However, there 49986222Swollman# were nearby inhabitants in some cases and for our purposes perhaps 50086222Swollman# it's best to simply use the official transition. 501219411Sedwin 502273438Sdelphij# From Paul Eggert (2014-07-18): 503273438Sdelphij# One opinion of the early-1980s turmoil in Alaska over time zones and 504273438Sdelphij# daylight saving time appeared as graffiti on a Juneau airport wall: 505273438Sdelphij# "Welcome to Juneau. Please turn your watch back to the 19th century." 506273438Sdelphij# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. 507273438Sdelphij# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html 508219411Sedwin# 509273438Sdelphij# Steve Ferguson (2011-01-31) referred to the following source: 510273438Sdelphij# Norris F. Keeping time in Alaska: national directives, local response. 511273438Sdelphij# Alaska History 2001;16(1-2). 512273438Sdelphij# http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ 513219411Sedwin 514219411Sedwin# From Arthur David Olson (2011-02-01): 515219411Sedwin# Here's database-relevant material from the 2001 "Alaska History" article: 516219411Sedwin# 517219411Sedwin# On September 20 [1979]...DOT...officials decreed that on April 27, 518219411Sedwin# 1980, Juneau and other nearby communities would move to Yukon Time. 519219411Sedwin# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 520219411Sedwin# Pacific Time. 521219411Sedwin# 522219411Sedwin# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 523219411Sedwin# Department's September 1979 decision. Juneau and other communities in 524219411Sedwin# northern Southeast reverted to Pacific Time on October 26. 525219411Sedwin# 526219411Sedwin# On October 28 [1983]...the Metlakatla Indian Community Council voted 527219411Sedwin# unanimously to keep the reservation on Pacific Time. 528219411Sedwin# 529219411Sedwin# According to DOT official Joanne Petrie, Indian reservations are not 530219411Sedwin# bound to follow time zones imposed by neighboring jurisdictions. 531219411Sedwin# 532219411Sedwin# (The last is consistent with how the database now handles the Navajo 533219411Sedwin# Nation.) 534219411Sedwin 535219411Sedwin# From Arthur David Olson (2011-02-09): 536219411Sedwin# I just spoke by phone with a staff member at the Metlakatla Indian 537219411Sedwin# Community office (using contact information available at 538219411Sedwin# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 539219411Sedwin# It's shortly after 1:00 here on the east coast of the United States; 540219411Sedwin# the staffer said it was shortly after 10:00 there. When I asked whether 541273438Sdelphij# that meant they were on Pacific time, they said no - they were on their 542219411Sedwin# own time. I asked about daylight saving; they said it wasn't used. I 543219411Sedwin# did not inquire about practices in the past. 544219411Sedwin 545226298Sedwin# From Arthur David Olson (2011-08-17): 546226298Sedwin# For lack of better information, assume that Metlakatla's 547226298Sedwin# abandonment of use of daylight saving resulted from the 1983 vote. 548226298Sedwin 549309568Sglebius# From Steffen Thorsen (2015-11-09): 550309568Sglebius# It seems Metlakatla did go off PST on Sunday, November 1, changing 551309568Sglebius# their time to AKST and are going to follow Alaska's DST, switching 552309568Sglebius# between AKST and AKDT from now on.... 553309568Sglebius# http://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ 554309568Sglebius 55514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 55675267SwollmanZone America/Juneau 15:02:19 - LMT 1867 Oct 18 55775267Swollman -8:57:41 - LMT 1900 Aug 20 12:00 55814343Swollman -8:00 - PST 1942 55914343Swollman -8:00 US P%sT 1946 56014343Swollman -8:00 - PST 1969 561309568Sglebius -8:00 US P%sT 1980 Apr 27 2:00 562309568Sglebius -9:00 US Y%sT 1980 Oct 26 2:00 563309568Sglebius -8:00 US P%sT 1983 Oct 30 2:00 564136638Swollman -9:00 US Y%sT 1983 Nov 30 56514343Swollman -9:00 US AK%sT 566226298SedwinZone America/Sitka 14:58:47 - LMT 1867 Oct 18 567219411Sedwin -9:01:13 - LMT 1900 Aug 20 12:00 568219411Sedwin -8:00 - PST 1942 569219411Sedwin -8:00 US P%sT 1946 570219411Sedwin -8:00 - PST 1969 571309568Sglebius -8:00 US P%sT 1983 Oct 30 2:00 572219411Sedwin -9:00 US Y%sT 1983 Nov 30 573219411Sedwin -9:00 US AK%sT 574219411SedwinZone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 575219411Sedwin -8:46:18 - LMT 1900 Aug 20 12:00 576219411Sedwin -8:00 - PST 1942 577219411Sedwin -8:00 US P%sT 1946 578219411Sedwin -8:00 - PST 1969 579309568Sglebius -8:00 US P%sT 1983 Oct 30 2:00 580309568Sglebius -8:00 - PST 2015 Nov 1 2:00 581309568Sglebius -9:00 US AK%sT 58275267SwollmanZone America/Yakutat 14:41:05 - LMT 1867 Oct 18 58375267Swollman -9:18:55 - LMT 1900 Aug 20 12:00 58414343Swollman -9:00 - YST 1942 58514343Swollman -9:00 US Y%sT 1946 58614343Swollman -9:00 - YST 1969 587136638Swollman -9:00 US Y%sT 1983 Nov 30 58814343Swollman -9:00 US AK%sT 58975267SwollmanZone America/Anchorage 14:00:24 - LMT 1867 Oct 18 59075267Swollman -9:59:36 - LMT 1900 Aug 20 12:00 59114343Swollman -10:00 - CAT 1942 592158421Swollman -10:00 US CAT/CAWT 1945 Aug 14 23:00u 593158421Swollman -10:00 US CAT/CAPT 1946 # Peace 59414343Swollman -10:00 - CAT 1967 Apr 59514343Swollman -10:00 - AHST 1969 596309568Sglebius -10:00 US AH%sT 1983 Oct 30 2:00 597136638Swollman -9:00 US Y%sT 1983 Nov 30 59814343Swollman -9:00 US AK%sT 59975267SwollmanZone America/Nome 12:58:21 - LMT 1867 Oct 18 60075267Swollman -11:01:38 - LMT 1900 Aug 20 12:00 60114343Swollman -11:00 - NST 1942 60214343Swollman -11:00 US N%sT 1946 60314343Swollman -11:00 - NST 1967 Apr 60414343Swollman -11:00 - BST 1969 605309568Sglebius -11:00 US B%sT 1983 Oct 30 2:00 606136638Swollman -9:00 US Y%sT 1983 Nov 30 60714343Swollman -9:00 US AK%sT 60875267SwollmanZone America/Adak 12:13:21 - LMT 1867 Oct 18 60975267Swollman -11:46:38 - LMT 1900 Aug 20 12:00 61014343Swollman -11:00 - NST 1942 61114343Swollman -11:00 US N%sT 1946 61214343Swollman -11:00 - NST 1967 Apr 61314343Swollman -11:00 - BST 1969 614309568Sglebius -11:00 US B%sT 1983 Oct 30 2:00 615136638Swollman -10:00 US AH%sT 1983 Nov 30 616309568Sglebius -10:00 US H%sT 617149514Swollman# The following switches don't quite make our 1970 cutoff. 618149514Swollman# 61914343Swollman# Shanks writes that part of southwest Alaska (e.g. Aniak) 62014343Swollman# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 62114343Swollman# and another part (e.g. Akiak) made the same switch five weeks later. 622149514Swollman# 623149514Swollman# From David Flater (2004-11-09): 624149514Swollman# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 625149514Swollman# Historic Preservation Commission, provided this information, which 626149514Swollman# suggests that Unalaska deviated from statutory time from early 1967 627149514Swollman# possibly until 1983: 628149514Swollman# 629149514Swollman# Minutes of the Unalaska City Council Meeting, January 10, 1967: 630149514Swollman# "Except for St. Paul and Akutan, Unalaska is the only important 631149514Swollman# location not on Alaska Standard Time. The following resolution was 632309568Sglebius# made by William Robinson and seconded by Henry Swanson: Be it 633149514Swollman# resolved that the City of Unalaska hereby goes to Alaska Standard 634149514Swollman# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 635149514Swollman# January 14, Alaska Standard Time.) This resolution was passed with 636149514Swollman# three votes for and one against." 6372742Swollman 63814343Swollman# Hawaii 639218122Sedwin 640218122Sedwin# From Arthur David Olson (2010-12-09): 641218122Sedwin# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 642218122Sedwin# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 643218122Sedwin# the article is available at 644218122Sedwin# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 645218122Sedwin# and indicates that standard time was adopted effective noon, January 646218122Sedwin# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 647218122Sedwin# saving for the period between the last Sunday of each April and the 648218122Sedwin# last Sunday of each September, but less than a month later repealed the 649218122Sedwin# act," (page 220), that year-round daylight saving time was in effect 650218122Sedwin# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 651218122Sedwin# when clocks changed) and that clocks were changed by 30 minutes 652218122Sedwin# effective the second Sunday of June, 1947 (page 219, with no time of 653218122Sedwin# day given for when clocks changed). A footnote for the 1933 changes 654218122Sedwin# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 655218122Sedwin# and Act 163 (approved 21 May 1933)." 656218122Sedwin 657218122Sedwin# From Arthur David Olson (2011-01-19): 658218122Sedwin# The following is from "Laws of the Territory of Hawaii Passed by the 659218122Sedwin# Seventeenth Legislature: Regular Session 1933," available (as of 660218122Sedwin# 2011-01-19) at American University's Pence Law Library. Page 85: "Act 661218122Sedwin# 90...At 2 o'clock ante meridian of the last Sunday in April of each 662218122Sedwin# year, the standard time of this Territory shall be advanced one 663218122Sedwin# hour...This Act shall take effect upon its approval. Approved this 26th 664218122Sedwin# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 665309568Sglebius# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 666218122Sedwin# hereby repealed...This Act shall take effect upon its approval, upon 667218122Sedwin# which date the standard time of this Territory shall be restored to 668218122Sedwin# that existing immediately prior to the taking effect of said Act 90. 669218122Sedwin# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 670218122Sedwin# of the Territory of Hawaii." 67114343Swollman# 672218122Sedwin# Note that 1933-05-21 was a Sunday. 673218122Sedwin# We're left to guess the time of day when Act 163 was approved; guess noon. 674218122Sedwin 675309568Sglebius# Zone NAME GMTOFF RULES FORMAT [UNTIL] 676309568SglebiusZone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 677309568Sglebius -10:30 - HST 1933 Apr 30 2:00 678309568Sglebius -10:30 1:00 HDT 1933 May 21 12:00 679309568Sglebius -10:30 - HST 1942 Feb 9 2:00 680309568Sglebius -10:30 1:00 HDT 1945 Sep 30 2:00 681309568Sglebius -10:30 - HST 1947 Jun 8 2:00 68214343Swollman -10:00 - HST 683257682SedwinLink Pacific/Honolulu Pacific/Johnston 684257682Sedwin 68514343Swollman# Now we turn to US areas that have diverged from the consensus since 1970. 68614343Swollman 68714343Swollman# Arizona mostly uses MST. 688114173Swollman 689114173Swollman# From Paul Eggert (2002-10-20): 690114173Swollman# 691114173Swollman# The information in the rest of this paragraph is derived from the 692273438Sdelphij# Daylight Saving Time web page 693273438Sdelphij# <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23) 694273438Sdelphij# maintained by the Arizona State Library, Archives and Public Records. 695114173Swollman# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 696114173Swollman# time, but by federal law railroads, airlines, bus lines, military 697114173Swollman# personnel, and some engaged in interstate commerce continued to 698114173Swollman# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 699114173Swollman# Gazette says that was the date the law changed, and that 04-01 was 700114173Swollman# the date the state's clocks would change. In 1945 the State of 701114173Swollman# Arizona used standard time all year, again with exceptions only as 702114173Swollman# mandated by federal law. Arizona observed DST in 1967, but Arizona 703114173Swollman# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 704114173Swollman# 705114173Swollman# Shanks says the 1944 experiment came to an end on 1944-03-17. 706114173Swollman# Go with the Arizona State Library instead. 707114173Swollman 708309568Sglebius# Zone NAME GMTOFF RULES FORMAT [UNTIL] 709149514SwollmanZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 710309568Sglebius -7:00 US M%sT 1944 Jan 1 0:01 711309568Sglebius -7:00 - MST 1944 Apr 1 0:01 712309568Sglebius -7:00 US M%sT 1944 Oct 1 0:01 71314343Swollman -7:00 - MST 1967 714114173Swollman -7:00 US M%sT 1968 Mar 21 71514343Swollman -7:00 - MST 71619878Swollman# From Arthur David Olson (1988-02-13): 71714343Swollman# A writer from the Inter Tribal Council of Arizona, Inc., 718136638Swollman# notes in private correspondence dated 1987-12-28 that "Presently, only the 7192742Swollman# Navajo Nation participates in the Daylight Saving Time policy, due to its 7202742Swollman# large size and location in three states." (The "only" means that other 7212742Swollman# tribal nations don't use DST.) 722257682Sedwin# 723257682Sedwin# From Paul Eggert (2013-08-26): 724257682Sedwin# See America/Denver for a zone appropriate for the Navajo Nation. 7252742Swollman 726136638Swollman# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 727136638Swollman# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 728136638Swollman# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 729136638Swollman# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 730171948Sedwin# Teton, Twin Falls, Valley, Washington counties, and the southern 731171948Sedwin# quarter of Idaho county) and eastern Oregon (most of Malheur County) 732136638Swollman# switched four weeks late in 1974. 733149514Swollman# 73414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 735149514SwollmanZone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 736309568Sglebius -8:00 US P%sT 1923 May 13 2:00 73714343Swollman -7:00 US M%sT 1974 738309568Sglebius -7:00 - MST 1974 Feb 3 2:00 73914343Swollman -7:00 US M%sT 7402742Swollman 74114343Swollman# Indiana 74214343Swollman# 74358787Sru# For a map of Indiana's time zone regions, see: 744309568Sglebius# http://en.wikipedia.org/wiki/Time_in_Indiana 74558787Sru# 746171948Sedwin# From Paul Eggert (2007-08-17): 747149590Swollman# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 748149590Swollman# with the following exceptions: 749149590Swollman# 750149590Swollman# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 751273438Sdelphij# Vanderburgh, and Warrick counties have been like America/Chicago. 752149590Swollman# 753149590Swollman# - Dearborn and Ohio counties have been like America/New_York. 754149590Swollman# 755149590Swollman# - Clark, Floyd, and Harrison counties have been like 756149590Swollman# America/Kentucky/Louisville. 757149590Swollman# 758171948Sedwin# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 759171948Sedwin# and Switzerland counties have their own time zone histories as noted below. 760158421Swollman# 761158421Swollman# Shanks partitioned Indiana into 345 regions, each with its own time history, 762257682Sedwin# and wrote "Even newspaper reports present contradictory information." 763158421Swollman# Those Hoosiers! Such a flighty and changeable people! 76414343Swollman# Fortunately, most of the complexity occurred before our cutoff date of 1970. 76514343Swollman# 76614343Swollman# Other than Indianapolis, the Indiana place names are so nondescript 767257682Sedwin# that they would be ambiguous if we left them at the 'America' level. 768257682Sedwin# So we reluctantly put them all in a subdirectory 'America/Indiana'. 76975267Swollman 770273438Sdelphij# From Paul Eggert (2014-06-26): 771273438Sdelphij# https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana 772273438Sdelphij# says "DOT is relocating the time zone boundary in Indiana to move Starke, 773158421Swollman# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 774158421Swollman# Eastern Time Zone to the Central Time Zone.... The effective date of 775273438Sdelphij# this rule is 2 a.m. EST Sunday, April 2, 2006, which is the 776158421Swollman# changeover date from standard time to Daylight Saving Time." 777273438Sdelphij# Strictly speaking, this meant the affected counties changed their 778273438Sdelphij# clocks twice that night, but this obviously was in error. The intent 779273438Sdelphij# was that 01:59:59 EST be followed by 02:00:00 CDT. 780158421Swollman 781169811Swollman# From Gwillim Law (2007-02-10): 782169811Swollman# The Associated Press has been reporting that Pulaski County, Indiana is 783169811Swollman# going to switch from Central to Eastern Time on March 11, 2007.... 784169811Swollman# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 785169811Swollman 78614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 78714343SwollmanRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 78814343SwollmanRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 78914343SwollmanRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 79014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 791309568SglebiusZone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 79214343Swollman -6:00 US C%sT 1920 79314343Swollman -6:00 Indianapolis C%sT 1942 79414343Swollman -6:00 US C%sT 1946 795309568Sglebius -6:00 Indianapolis C%sT 1955 Apr 24 2:00 796309568Sglebius -5:00 - EST 1957 Sep 29 2:00 797309568Sglebius -6:00 - CST 1958 Apr 27 2:00 79814343Swollman -5:00 - EST 1969 79914343Swollman -5:00 US E%sT 1971 800149514Swollman -5:00 - EST 2006 801149514Swollman -5:00 US E%sT 8022742Swollman# 803158421Swollman# Eastern Crawford County, Indiana, left its clocks alone in 1974, 804158421Swollman# as well as from 1976 through 2005. 80514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 80614343SwollmanRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 80714343SwollmanRule Marengo 1951 only - Sep lastSun 2:00 0 S 80814343SwollmanRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 80914343SwollmanRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 81014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 811149514SwollmanZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 81214343Swollman -6:00 US C%sT 1951 813309568Sglebius -6:00 Marengo C%sT 1961 Apr 30 2:00 81414343Swollman -5:00 - EST 1969 815309568Sglebius -5:00 US E%sT 1974 Jan 6 2:00 816309568Sglebius -6:00 1:00 CDT 1974 Oct 27 2:00 81714343Swollman -5:00 US E%sT 1976 818149514Swollman -5:00 - EST 2006 819149514Swollman -5:00 US E%sT 82014343Swollman# 821171948Sedwin# Daviess, Dubois, Knox, and Martin Counties, Indiana, 822171948Sedwin# switched from eastern to central time in April 2006, then switched back 823171948Sedwin# in November 2007. 824158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 825158421SwollmanRule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 826158421SwollmanRule Vincennes 1946 only - Sep lastSun 2:00 0 S 827158421SwollmanRule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 828158421SwollmanRule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 829158421SwollmanRule Vincennes 1955 only - May 1 0:00 1:00 D 830158421SwollmanRule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 831158421SwollmanRule Vincennes 1960 only - Oct lastSun 2:00 0 S 832158421SwollmanRule Vincennes 1961 only - Sep lastSun 2:00 0 S 833158421SwollmanRule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 834158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 835158421SwollmanZone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 836158421Swollman -6:00 US C%sT 1946 837309568Sglebius -6:00 Vincennes C%sT 1964 Apr 26 2:00 838158421Swollman -5:00 - EST 1969 839158421Swollman -5:00 US E%sT 1971 840309568Sglebius -5:00 - EST 2006 Apr 2 2:00 841309568Sglebius -6:00 US C%sT 2007 Nov 4 2:00 842171948Sedwin -5:00 US E%sT 843171948Sedwin# 844171948Sedwin# Perry County, Indiana, switched from eastern to central time in April 2006. 845171948Sedwin# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 846171948SedwinRule Perry 1946 only - Apr lastSun 2:00 1:00 D 847171948SedwinRule Perry 1946 only - Sep lastSun 2:00 0 S 848171948SedwinRule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 849171948SedwinRule Perry 1953 1959 - Sep lastSun 2:00 0 S 850171948SedwinRule Perry 1955 only - May 1 0:00 1:00 D 851171948SedwinRule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 852171948SedwinRule Perry 1960 only - Oct lastSun 2:00 0 S 853171948SedwinRule Perry 1961 only - Sep lastSun 2:00 0 S 854171948SedwinRule Perry 1962 1963 - Oct lastSun 2:00 0 S 855171948Sedwin# Zone NAME GMTOFF RULES FORMAT [UNTIL] 856171948SedwinZone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 857171948Sedwin -6:00 US C%sT 1946 858309568Sglebius -6:00 Perry C%sT 1964 Apr 26 2:00 859171948Sedwin -5:00 - EST 1969 860171948Sedwin -5:00 US E%sT 1971 861309568Sglebius -5:00 - EST 2006 Apr 2 2:00 862158421Swollman -6:00 US C%sT 863158421Swollman# 864158421Swollman# Pike County, Indiana moved from central to eastern time in 1977, 865171948Sedwin# then switched back in 2006, then switched back again in 2007. 866158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 867158421SwollmanRule Pike 1955 only - May 1 0:00 1:00 D 868158421SwollmanRule Pike 1955 1960 - Sep lastSun 2:00 0 S 869158421SwollmanRule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 870158421SwollmanRule Pike 1961 1964 - Oct lastSun 2:00 0 S 871158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 872158421SwollmanZone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 873158421Swollman -6:00 US C%sT 1955 874309568Sglebius -6:00 Pike C%sT 1965 Apr 25 2:00 875309568Sglebius -5:00 - EST 1966 Oct 30 2:00 876309568Sglebius -6:00 US C%sT 1977 Oct 30 2:00 877309568Sglebius -5:00 - EST 2006 Apr 2 2:00 878309568Sglebius -6:00 US C%sT 2007 Nov 4 2:00 879171948Sedwin -5:00 US E%sT 880158421Swollman# 881158421Swollman# Starke County, Indiana moved from central to eastern time in 1991, 882158421Swollman# then switched back in 2006. 88319878Swollman# From Arthur David Olson (1991-10-28): 88419878Swollman# An article on page A3 of the Sunday, 1991-10-27 Washington Post 88514343Swollman# notes that Starke County switched from Central time to Eastern time as of 88619878Swollman# 1991-10-27. 88714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 88814343SwollmanRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 88914343SwollmanRule Starke 1947 1954 - Sep lastSun 2:00 0 S 89014343SwollmanRule Starke 1955 1956 - Oct lastSun 2:00 0 S 89114343SwollmanRule Starke 1957 1958 - Sep lastSun 2:00 0 S 89214343SwollmanRule Starke 1959 1961 - Oct lastSun 2:00 0 S 89314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 894149514SwollmanZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 89514343Swollman -6:00 US C%sT 1947 896309568Sglebius -6:00 Starke C%sT 1962 Apr 29 2:00 897309568Sglebius -5:00 - EST 1963 Oct 27 2:00 898309568Sglebius -6:00 US C%sT 1991 Oct 27 2:00 899309568Sglebius -5:00 - EST 2006 Apr 2 2:00 900158421Swollman -6:00 US C%sT 90114343Swollman# 902169811Swollman# Pulaski County, Indiana, switched from eastern to central time in 903169811Swollman# April 2006 and then switched back in March 2007. 904169811Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 905169811SwollmanRule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 906169811SwollmanRule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 907169811SwollmanRule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 908169811SwollmanRule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 909169811Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 910169811SwollmanZone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 911169811Swollman -6:00 US C%sT 1946 912309568Sglebius -6:00 Pulaski C%sT 1961 Apr 30 2:00 913169811Swollman -5:00 - EST 1969 914169811Swollman -5:00 US E%sT 1971 915309568Sglebius -5:00 - EST 2006 Apr 2 2:00 916309568Sglebius -6:00 US C%sT 2007 Mar 11 2:00 917169811Swollman -5:00 US E%sT 918169811Swollman# 919158421Swollman# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 92014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 921149514SwollmanZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 922309568Sglebius -6:00 US C%sT 1954 Apr 25 2:00 92314343Swollman -5:00 - EST 1969 92414343Swollman -5:00 US E%sT 1973 925149514Swollman -5:00 - EST 2006 926149514Swollman -5:00 US E%sT 9272742Swollman 92814343Swollman# Part of Kentucky left its clocks alone in 1974. 929149590Swollman# This also includes Clark, Floyd, and Harrison counties in Indiana. 93014343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 93114343SwollmanRule Louisville 1921 only - May 1 2:00 1:00 D 93214343SwollmanRule Louisville 1921 only - Sep 1 2:00 0 S 93314343SwollmanRule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 93414343SwollmanRule Louisville 1941 only - Sep lastSun 2:00 0 S 93514343SwollmanRule Louisville 1946 only - Jun 2 2:00 0 S 93614343SwollmanRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 93714343SwollmanRule Louisville 1956 1960 - Oct lastSun 2:00 0 S 93814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 939149514SwollmanZone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 94014343Swollman -6:00 US C%sT 1921 94114343Swollman -6:00 Louisville C%sT 1942 94214343Swollman -6:00 US C%sT 1946 943309568Sglebius -6:00 Louisville C%sT 1961 Jul 23 2:00 94414343Swollman -5:00 - EST 1968 945309568Sglebius -5:00 US E%sT 1974 Jan 6 2:00 946309568Sglebius -6:00 1:00 CDT 1974 Oct 27 2:00 94714343Swollman -5:00 US E%sT 94867578Swollman# 949158421Swollman# Wayne County, Kentucky 95058787Sru# 951273438Sdelphij# From Lake Cumberland LIFE 952309568Sglebius# http://www.lake-cumberland.com/life/archive/news990129time.shtml 953273438Sdelphij# (1999-01-29) via WKYM-101.7: 95458787Sru# Clinton County has joined Wayne County in asking the DoT to change from 95558787Sru# the Central to the Eastern time zone.... The Wayne County government made 95658787Sru# the same request in December. And while Russell County officials have not 95758787Sru# taken action, the majority of respondents to a poll conducted there in 95858787Sru# August indicated they would like to change to "fast time" also. 95958787Sru# The three Lake Cumberland counties are the farthest east of any U.S. 96058787Sru# location in the Central time zone. 96167578Swollman# 96267578Swollman# From Rich Wales (2000-08-29): 96367578Swollman# After prolonged debate, and despite continuing deep differences of opinion, 96467578Swollman# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 96575267Swollman# (-0500) time. They won't "fall back" this year. See Sara Shipley, 96675267Swollman# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 96786222Swollman# 96886222Swollman# From Paul Eggert (2001-07-16): 96986222Swollman# The final rule was published in the 970273438Sdelphij# Federal Register 65, 160 (2000-08-17), pp 50154-50158. 971309568Sglebius# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22 972114173Swollman# 973149514SwollmanZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 97467578Swollman -6:00 US C%sT 1946 97567578Swollman -6:00 - CST 1968 97667578Swollman -6:00 US C%sT 2000 Oct 29 2:00 97767578Swollman -5:00 US E%sT 9782742Swollman 97967578Swollman 98067578Swollman# From Rives McDow (2000-08-30): 98167578Swollman# Here ... are all the changes in the US since 1985. 98267578Swollman# Kearny County, KS (put all of county on central; 98367578Swollman# previously split between MST and CST) ... 1990-10 98467578Swollman# Starke County, IN (from CST to EST) ... 1991-10 98567578Swollman# Oliver County, ND (from MST to CST) ... 1992-10 98667578Swollman# West Wendover, NV (from PST TO MST) ... 1999-10 98767578Swollman# Wayne County, KY (from CST to EST) ... 2000-10 98867578Swollman# 98986222Swollman# From Paul Eggert (2001-07-17): 99086222Swollman# We don't know where the line used to be within Kearny County, KS, 99186222Swollman# so omit that change for now. 99286222Swollman# See America/Indiana/Knox for the Starke County, IN change. 99386222Swollman# See America/North_Dakota/Center for the Oliver County, ND change. 99486222Swollman# West Wendover, NV officially switched from Pacific to mountain time on 99586222Swollman# 1999-10-31. See the 996273438Sdelphij# Federal Register 64, 203 (1999-10-21), pp 56705-56707. 997309568Sglebius# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15 99886222Swollman# However, the Federal Register says that West Wendover already operated 99986222Swollman# on mountain time, and the rule merely made this official; 100086222Swollman# hence a separate tz entry is not needed. 100167578Swollman 100214343Swollman# Michigan 100314343Swollman# 100419878Swollman# From Bob Devine (1988-01-28): 100514343Swollman# Michigan didn't observe DST from 1968 to 1973. 100614343Swollman# 100758787Sru# From Paul Eggert (1999-03-31): 100858787Sru# Shanks writes that Michigan started using standard time on 1885-09-18, 100958787Sru# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 101058787Sru# that Detroit kept 101114343Swollman# 101214343Swollman# local time until 1900 when the City Council decreed that clocks should 101314343Swollman# be put back twenty-eight minutes to Central Standard Time. Half the 101414343Swollman# city obeyed, half refused. After considerable debate, the decision 101514343Swollman# was rescinded and the city reverted to Sun time. A derisive offer to 101614343Swollman# erect a sundial in front of the city hall was referred to the 101714343Swollman# Committee on Sewers. Then, in 1905, Central time was adopted 101814343Swollman# by city vote. 101914343Swollman# 102014343Swollman# This story is too entertaining to be false, so go with Howse over Shanks. 102114343Swollman# 102275267Swollman# From Paul Eggert (2001-03-06): 1023257682Sedwin# Garland (1927) writes "Cleveland and Detroit advanced their clocks 1024257682Sedwin# one hour in 1914." This change is not in Shanks. We have no more 102575267Swollman# info, so omit this for now. 102675267Swollman# 102714343Swollman# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 102814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 102914343SwollmanRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 103014343SwollmanRule Detroit 1948 only - Sep lastSun 2:00 0 S 103114343SwollmanRule Detroit 1967 only - Jun 14 2:00 1:00 D 103214343SwollmanRule Detroit 1967 only - Oct lastSun 2:00 0 S 103314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 103414343SwollmanZone America/Detroit -5:32:11 - LMT 1905 1035309568Sglebius -6:00 - CST 1915 May 15 2:00 103614343Swollman -5:00 - EST 1942 103714343Swollman -5:00 US E%sT 1946 103814343Swollman -5:00 Detroit E%sT 1973 103914343Swollman -5:00 US E%sT 1975 1040309568Sglebius -5:00 - EST 1975 Apr 27 2:00 104114343Swollman -5:00 US E%sT 104214343Swollman# 1043158421Swollman# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 1044158421Swollman# switched from EST to CST/CDT in 1973. 104514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 104614343SwollmanRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 104714343SwollmanRule Menominee 1946 only - Sep lastSun 2:00 0 S 104814343SwollmanRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 104914343SwollmanRule Menominee 1966 only - Oct lastSun 2:00 0 S 105014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 105114343SwollmanZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 105214343Swollman -6:00 US C%sT 1946 1053309568Sglebius -6:00 Menominee C%sT 1969 Apr 27 2:00 1054309568Sglebius -5:00 - EST 1973 Apr 29 2:00 105514343Swollman -6:00 US C%sT 105614343Swollman 10572742Swollman# Navassa 105886222Swollman# administered by the US Fish and Wildlife Service 105943543Swollman# claimed by US under the provisions of the 1856 Guano Islands Act 106043543Swollman# also claimed by Haiti 106143543Swollman# occupied 1857/1900 by the Navassa Phosphate Co 106286222Swollman# US lighthouse 1917/1996-09 106343543Swollman# currently uninhabited 1064257682Sedwin# see Mark Fineman, "An Isle Rich in Guano and Discord", 106543543Swollman# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 106643543Swollman# Jimmy Skaggs, _The Great Guano Rush_ (1994). 106714343Swollman 10682742Swollman################################################################################ 10692742Swollman 10702742Swollman 1071309568Sglebius# From Paul Eggert (2014-10-31): 1072309568Sglebius# 1073309568Sglebius# Unless otherwise specified, the source for data through 1990 is: 1074158421Swollman# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1075158421Swollman# San Diego: ACS Publications, Inc. (2003). 1076309568Sglebius# Unfortunately this book contains many errors and cites no sources. 10772742Swollman# 107886222Swollman# Gwillim Law writes that a good source 107920094Swollman# for recent time zone data is the International Air Transport 108020094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 108120094Swollman# published semiannually. Law sent in several helpful summaries 1082309568Sglebius# of the IATA's data after 1990. Except where otherwise noted, 1083309568Sglebius# IATA SSIM is the source for entries after 1990. 108420094Swollman# 1085121098Swollman# Other sources occasionally used include: 10862742Swollman# 1087121098Swollman# Edward W. Whitman, World Time Differences, 1088121098Swollman# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1089121098Swollman# which I found in the UCLA library. 1090121098Swollman# 1091121098Swollman# William Willett, The Waste of Daylight, 19th edition 1092267489Sedwin# <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf> 1093267489Sedwin# [PDF] (1914-03) 1094121098Swollman# 1095248310Sedwin# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1096248310Sedwin# <http://www.jstor.org/stable/1774359>. 1097248310Sedwin# 1098257682Sedwin# See the 'europe' file for Greenland. 10992742Swollman 11002742Swollman# Canada 11012742Swollman 1102273438Sdelphij# From Alain LaBont�� (1994-11-14): 11039908Swollman# I post here the time zone abbreviations standardized in Canada 11049908Swollman# for both English and French in the CAN/CSA-Z234.4-89 standard.... 11059908Swollman# 1106273438Sdelphij# UTC Standard time Daylight saving time 11079908Swollman# offset French English French English 11089908Swollman# -2:30 - - HAT NDT 11099908Swollman# -3 - - HAA ADT 11109908Swollman# -3:30 HNT NST - - 11119908Swollman# -4 HNA AST HAE EDT 11129908Swollman# -5 HNE EST HAC CDT 11139908Swollman# -6 HNC CST HAR MDT 11149908Swollman# -7 HNR MST HAP PDT 11159908Swollman# -8 HNP PST HAY YDT 11169908Swollman# -9 HNY YST - - 11179908Swollman# 11189908Swollman# HN: Heure Normale ST: Standard Time 1119273438Sdelphij# HA: Heure Avanc��e DT: Daylight saving Time 11209908Swollman# 11219908Swollman# A: de l'Atlantique Atlantic 11229908Swollman# C: du Centre Central 11239908Swollman# E: de l'Est Eastern 11249908Swollman# M: Mountain 11259908Swollman# N: Newfoundland 11269908Swollman# P: du Pacifique Pacific 11279908Swollman# R: des Rocheuses 11289908Swollman# T: de Terre-Neuve 11299908Swollman# Y: du Yukon Yukon 11309908Swollman# 1131149514Swollman# From Paul Eggert (1994-11-22): 11329908Swollman# Alas, this sort of thing must be handled by localization software. 11332742Swollman 1134309568Sglebius# Unless otherwise specified, the data entries for Canada are all from Shanks 1135158421Swollman# & Pottenger. 11369908Swollman 1137169811Swollman# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1138169811Swollman# 2007-03-01): 1139158421Swollman# The British Columbia government announced yesterday that it will 1140158421Swollman# adjust daylight savings next year to align with changes in the 1141158421Swollman# U.S. and the rest of Canada.... 1142158421Swollman# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1143169811Swollman# ... 1144169811Swollman# Nova Scotia 1145163302Sru# Daylight saving time will be extended by four weeks starting in 2007.... 1146169811Swollman# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1147169811Swollman# 1148163302Sru# [For New Brunswick] the new legislation dictates that the time change is to 1149163302Sru# be done at 02:00 instead of 00:01. 1150163302Sru# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1151163302Sru# ... 1152163302Sru# Manitoba has traditionally changed the clock every fall at 03:00. 1153163302Sru# As of 2006, the transition is to take place one hour earlier at 02:00. 1154163302Sru# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1155163302Sru# ... 1156163302Sru# [Alberta, Ontario, Quebec] will follow US rules. 1157169811Swollman# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1158163302Sru# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1159169811Swollman# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1160163302Sru# ... 1161169811Swollman# P.E.I. will follow US rules.... 1162169811Swollman# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1163163302Sru# ... 1164169811Swollman# Province of Newfoundland and Labrador.... 1165169811Swollman# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1166163302Sru# ... 1167169811Swollman# Yukon 1168169811Swollman# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1169169811Swollman# ... 1170163302Sru# N.W.T. will follow US rules. Whoever maintains the government web site 1171163302Sru# does not seem to believe in bookmarks. To see the news release, click the 1172163302Sru# following link and search for "Daylight Savings Time Change". Press the 1173163302Sru# "Daylight Savings Time Change" link; it will fire off a popup using 1174163302Sru# JavaScript. 1175163302Sru# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1176169811Swollman# ... 1177169811Swollman# Nunavut 1178169811Swollman# An amendment to the Interpretation Act was registered on February 19/2007.... 1179169811Swollman# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1180163302Sru 1181309568Sglebius# From Paul Eggert (2014-10-18): 118267578Swollman# H. David Matthews and Mary Vincent's map 118367578Swollman# "It's about TIME", _Canadian Geographic_ (September-October 1998) 1184309568Sglebius# http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp 1185273438Sdelphij# contains detailed boundaries for regions observing nonstandard 118667578Swollman# time and daylight saving time arrangements in Canada circa 1998. 118767578Swollman# 1188309568Sglebius# National Research Council Canada maintains info about time zones and DST. 1189309568Sglebius# http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html 1190309568Sglebius# http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 119167578Swollman# Its unofficial information is often taken from Matthews and Vincent. 11929908Swollman 1193163302Sru# From Paul Eggert (2006-06-27): 1194163302Sru# For now, assume all of DST-observing Canada will fall into line with the 1195163302Sru# new US DST rules, 1196163302Sru 1197233447Sedwin# From Chris Walton (2011-12-01) 1198233447Sedwin# In the first of Tammy Hardwick's articles 1199233447Sedwin# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1200233447Sedwin# she quotes the Friday November 1/1918 edition of the Creston Review. 1201233447Sedwin# The quote includes these two statements: 1202233447Sedwin# 'Sunday the CPR went back to the old system of time...' 1203233447Sedwin# '... The daylight saving scheme was dropped all over Canada at the same time,' 1204233447Sedwin# These statements refer to a transition from daylight time to standard time 1205233447Sedwin# that occurred nationally on Sunday October 27/1918. This transition was 1206233447Sedwin# also documented in the Saturday October 26/1918 edition of the Toronto Star. 1207233447Sedwin 1208233447Sedwin# In light of that evidence, we alter the date from the earlier believed 1209233447Sedwin# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1210233447Sedwin# than Thursday) in all Canadian rulesets. 1211233447Sedwin 12122742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 121317200SwollmanRule Canada 1918 only - Apr 14 2:00 1:00 D 1214233447SedwinRule Canada 1918 only - Oct 27 2:00 0 S 1215121098SwollmanRule Canada 1942 only - Feb 9 2:00 1:00 W # War 1216121098SwollmanRule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 121717200SwollmanRule Canada 1945 only - Sep 30 2:00 0 S 121817200SwollmanRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1219153761SwollmanRule Canada 1974 2006 - Oct lastSun 2:00 0 S 1220153761SwollmanRule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1221153761SwollmanRule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1222153761SwollmanRule Canada 2007 max - Nov Sun>=1 2:00 0 S 122317200Swollman 122417200Swollman 1225163302Sru# Newfoundland and Labrador 122617200Swollman 122767578Swollman# From Paul Eggert (2000-10-02): 122867578Swollman# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 122967578Swollman# but the only part of Labrador that follows the rules is the 123067578Swollman# southeast corner, including Port Hope Simpson and Mary's Harbour, 123167578Swollman# but excluding, say, Black Tickle. 123267578Swollman 123317200Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1234121098SwollmanRule StJohns 1917 only - Apr 8 2:00 1:00 D 12352742SwollmanRule StJohns 1917 only - Sep 17 2:00 0 S 1236158421Swollman# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 12372742SwollmanRule StJohns 1919 only - May 5 23:00 1:00 D 12382742SwollmanRule StJohns 1919 only - Aug 12 23:00 0 S 1239158421Swollman# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 12402742SwollmanRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 12412742SwollmanRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1242158421Swollman# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1243158421Swollman# Pottenger. 1244121098SwollmanRule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1245121098SwollmanRule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1246121098Swollman# Whitman gives the following transitions: 1247121098Swollman# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1248158421Swollman# but go with Shanks & Pottenger and assume they used Canadian rules. 12492742Swollman# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1250158421Swollman# Apr 30 - Sep 24; go with Shanks & Pottenger. 12512742SwollmanRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 12522742SwollmanRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 12532742SwollmanRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 12542742SwollmanRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 125567578SwollmanRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 125667578Swollman# From Paul Eggert (2000-10-02): 125767578Swollman# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 125867578Swollman# at 00:01 local time. For now, assume it started in 1987. 1259226298Sedwin 1260226298Sedwin# From Michael Pelley (2011-09-12): 1261226298Sedwin# We received today, Monday, September 12, 2011, notification that the 1262226298Sedwin# changes to the Newfoundland Standard Time Act have been proclaimed. 1263226298Sedwin# The change in the Act stipulates that the change from Daylight Savings 1264226298Sedwin# Time to Standard Time and from Standard Time to Daylight Savings Time 1265226298Sedwin# now occurs at 2:00AM. 1266226298Sedwin# ... 1267226298Sedwin# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1268226298Sedwin# ... 1269226298Sedwin# MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1270226298Sedwin# Office of the Chief Information Officer 1271226298Sedwin# Executive Council 1272226298Sedwin# Government of Newfoundland & Labrador 1273226298Sedwin 127467578SwollmanRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1275158421SwollmanRule StJohns 1987 2006 - Oct lastSun 0:01 0 S 127667578SwollmanRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1277158421SwollmanRule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1278226298SedwinRule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1279226298SedwinRule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1280158421Swollman# 12812742Swollman# St John's has an apostrophe, but Posix file names can't have apostrophes. 12822742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 12832742SwollmanZone America/St_Johns -3:30:52 - LMT 1884 1284121098Swollman -3:30:52 StJohns N%sT 1918 1285121098Swollman -3:30:52 Canada N%sT 1919 128620094Swollman -3:30:52 StJohns N%sT 1935 Mar 30 1287121098Swollman -3:30 StJohns N%sT 1942 May 11 1288121098Swollman -3:30 Canada N%sT 1946 1289226298Sedwin -3:30 StJohns N%sT 2011 Nov 1290226298Sedwin -3:30 Canada N%sT 12912742Swollman 129267578Swollman# most of east Labrador 129317200Swollman 1294257682Sedwin# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 129520094Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 129620094SwollmanZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1297121098Swollman -3:30:52 - NST 1918 1298121098Swollman -3:30:52 Canada N%sT 1919 129920094Swollman -3:30:52 - NST 1935 Mar 30 130020094Swollman -3:30 - NST 1936 1301121098Swollman -3:30 StJohns N%sT 1942 May 11 1302121098Swollman -3:30 Canada N%sT 1946 1303309568Sglebius -3:30 StJohns N%sT 1966 Mar 15 2:00 1304226298Sedwin -4:00 StJohns A%sT 2011 Nov 1305226298Sedwin -4:00 Canada A%sT 130620094Swollman 130720094Swollman 1308158421Swollman# west Labrador, Nova Scotia, Prince Edward I 130920094Swollman 1310309568Sglebius# From Brian Inglis (2015-07-20): 1311309568Sglebius# From the historical weather station records available at: 1312309568Sglebius# https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada 1313309568Sglebius# Sydney shares the same time history as Glace Bay, so was 1314309568Sglebius# likely to be the same across the island.... 1315309568Sglebius# Sydney, as the capital and most populous location, or Cape Breton, would 1316309568Sglebius# have been better names for the zone had we known this in 1996. 1317309568Sglebius 1318309568Sglebius# From Paul Eggert (2015-07-20): 1319158421Swollman# Shanks & Pottenger write that since 1970 most of this region has been like 1320158421Swollman# Halifax. Many locales did not observe peacetime DST until 1972; 1321309568Sglebius# the Cape Breton area, represented by Glace Bay, is the largest we know of 1322309568Sglebius# (Glace Bay was perhaps not the best name choice but no point changing now). 1323158421Swollman# Shanks & Pottenger also write that Liverpool, NS was the only town 1324158421Swollman# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1325158421Swollman# this is a typo. 132617200Swollman 13272742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1328158421SwollmanRule Halifax 1916 only - Apr 1 0:00 1:00 D 1329158421SwollmanRule Halifax 1916 only - Oct 1 0:00 0 S 1330158421SwollmanRule Halifax 1920 only - May 9 0:00 1:00 D 1331158421SwollmanRule Halifax 1920 only - Aug 29 0:00 0 S 1332158421SwollmanRule Halifax 1921 only - May 6 0:00 1:00 D 1333158421SwollmanRule Halifax 1921 1922 - Sep 5 0:00 0 S 1334158421SwollmanRule Halifax 1922 only - Apr 30 0:00 1:00 D 1335158421SwollmanRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1336158421SwollmanRule Halifax 1923 only - Sep 4 0:00 0 S 1337158421SwollmanRule Halifax 1924 only - Sep 15 0:00 0 S 1338158421SwollmanRule Halifax 1925 only - Sep 28 0:00 0 S 1339158421SwollmanRule Halifax 1926 only - May 16 0:00 1:00 D 1340158421SwollmanRule Halifax 1926 only - Sep 13 0:00 0 S 1341158421SwollmanRule Halifax 1927 only - May 1 0:00 1:00 D 1342158421SwollmanRule Halifax 1927 only - Sep 26 0:00 0 S 1343158421SwollmanRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1344158421SwollmanRule Halifax 1928 only - Sep 9 0:00 0 S 1345158421SwollmanRule Halifax 1929 only - Sep 3 0:00 0 S 1346158421SwollmanRule Halifax 1930 only - Sep 15 0:00 0 S 1347158421SwollmanRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1348158421SwollmanRule Halifax 1932 only - May 1 0:00 1:00 D 1349158421SwollmanRule Halifax 1933 only - Apr 30 0:00 1:00 D 1350158421SwollmanRule Halifax 1933 only - Oct 2 0:00 0 S 1351158421SwollmanRule Halifax 1934 only - May 20 0:00 1:00 D 1352158421SwollmanRule Halifax 1934 only - Sep 16 0:00 0 S 1353158421SwollmanRule Halifax 1935 only - Jun 2 0:00 1:00 D 1354158421SwollmanRule Halifax 1935 only - Sep 30 0:00 0 S 1355158421SwollmanRule Halifax 1936 only - Jun 1 0:00 1:00 D 1356158421SwollmanRule Halifax 1936 only - Sep 14 0:00 0 S 1357158421SwollmanRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1358158421SwollmanRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1359158421SwollmanRule Halifax 1939 only - May 28 0:00 1:00 D 1360158421SwollmanRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1361158421SwollmanRule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1362158421SwollmanRule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1363158421SwollmanRule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1364158421SwollmanRule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1365158421SwollmanRule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1366158421SwollmanRule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1367158421SwollmanRule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1368158421SwollmanRule Halifax 1962 1973 - Oct lastSun 2:00 0 S 13692742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 13702742SwollmanZone America/Halifax -4:14:24 - LMT 1902 Jun 15 1371121098Swollman -4:00 Halifax A%sT 1918 1372121098Swollman -4:00 Canada A%sT 1919 1373309568Sglebius -4:00 Halifax A%sT 1942 Feb 9 2:00s 1374121098Swollman -4:00 Canada A%sT 1946 1375121098Swollman -4:00 Halifax A%sT 1974 1376121098Swollman -4:00 Canada A%sT 137717200SwollmanZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 137817200Swollman -4:00 Canada A%sT 1953 137917200Swollman -4:00 Halifax A%sT 1954 138017200Swollman -4:00 - AST 1972 1381121098Swollman -4:00 Halifax A%sT 1974 1382121098Swollman -4:00 Canada A%sT 13832742Swollman 1384158421Swollman# New Brunswick 13858029Swollman 1386169811Swollman# From Paul Eggert (2007-01-31): 1387169811Swollman# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1388169811Swollman# says they changed at 00:01 through 2006, and 1389158421Swollman# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1390169811Swollman# clear that this was the case since at least 1993. 1391163302Sru# For now, assume it started in 1993. 1392158421Swollman 1393158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1394158421SwollmanRule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1395158421SwollmanRule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1396158421SwollmanRule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1397158421SwollmanRule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1398158421SwollmanRule Moncton 1939 only - May 27 1:00 1:00 D 1399158421SwollmanRule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1400158421SwollmanRule Moncton 1940 only - May 19 1:00 1:00 D 1401158421SwollmanRule Moncton 1941 only - May 4 1:00 1:00 D 1402158421SwollmanRule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1403158421SwollmanRule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1404158421SwollmanRule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1405158421SwollmanRule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1406158421SwollmanRule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1407158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1408158421SwollmanZone America/Moncton -4:19:08 - LMT 1883 Dec 9 1409158421Swollman -5:00 - EST 1902 Jun 15 1410158421Swollman -4:00 Canada A%sT 1933 1411158421Swollman -4:00 Moncton A%sT 1942 1412158421Swollman -4:00 Canada A%sT 1946 1413158421Swollman -4:00 Moncton A%sT 1973 1414158421Swollman -4:00 Canada A%sT 1993 1415163302Sru -4:00 Moncton A%sT 2007 1416163302Sru -4:00 Canada A%sT 1417158421Swollman 1418163302Sru# Quebec 141917200Swollman 1420309568Sglebius# From Paul Eggert (2015-03-24): 1421309568Sglebius# See America/Toronto for most of Quebec, including Montreal. 1422309568Sglebius# 1423163302Sru# Matthews and Vincent (1998) also write that Quebec east of the -63 1424163302Sru# meridian is supposed to observe AST, but residents as far east as 1425163302Sru# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1426257682Sedwin# The Quebec department of justice writes in 1427273438Sdelphij# "The situation in Minganie and Basse-C��te-Nord" 1428257682Sedwin# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm 1429257682Sedwin# that the coastal strip from just east of Natashquan to Blanc-Sablon 1430257682Sedwin# observes Atlantic standard time all year round. 1431257682Sedwin# http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en 1432163302Sru# says this common practice was codified into law as of 2007. 1433163302Sru# For lack of better info, guess this practice began around 1970, contra to 1434163302Sru# Shanks & Pottenger who have this region observing AST/ADT. 1435163302Sru 1436163302Sru# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1437163302SruZone America/Blanc-Sablon -3:48:28 - LMT 1884 1438163302Sru -4:00 Canada A%sT 1970 1439163302Sru -4:00 - AST 1440163302Sru 1441163302Sru# Ontario 1442163302Sru 1443163302Sru# From Paul Eggert (2006-07-09): 1444163302Sru# Shanks & Pottenger write that since 1970 most of Ontario has been like 1445163302Sru# Toronto. 144617200Swollman# Thunder Bay skipped DST in 1973. 144717200Swollman# Many smaller locales did not observe peacetime DST until 1974; 144817200Swollman# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 144917200Swollman# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 145017200Swollman 1451121098Swollman# From Mark Brader (2003-07-26): 1452121098Swollman# [According to the Toronto Star] Orillia, Ontario, adopted DST 1453121098Swollman# effective Saturday, 1912-06-22, 22:00; the article mentions that 1454121098Swollman# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1455121098Swollman# have already done so. In Orillia DST was to run until Saturday, 1456121098Swollman# 1912-08-31 (no time mentioned), but it was met with considerable 1457121098Swollman# hostility from certain segments of the public, and was revoked after 1458273438Sdelphij# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but 1459121098Swollman# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1460121098Swollman# earlier in June). 1461121098Swollman# 1462121098Swollman# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1463121098Swollman 146443014Swollman# From Paul Eggert (1997-10-17): 1465121098Swollman# Mark Brader writes that an article in the 1997-10-14 Toronto Star 146643014Swollman# says that Atikokan, Ontario currently does not observe DST, 146743014Swollman# but will vote on 11-10 whether to use EST/EDT. 1468273438Sdelphij# He also writes that the Ontario Time Act (1990, Chapter T.9) 1469309568Sglebius# http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html 147043014Swollman# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 147143014Swollman# Officially Atikokan is therefore on CST/CDT, and most likely this report 147243014Swollman# concerns a non-official time observed as a matter of local practice. 1473158421Swollman# 147467578Swollman# From Paul Eggert (2000-10-02): 147567578Swollman# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 147667578Swollman# New Osnaburgh observe CST all year, that Big Trout Lake observes 147767578Swollman# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 147867578Swollman# violation of the official Ontario rules. 1479163302Sru# 1480163302Sru# From Paul Eggert (2006-07-09): 1481163302Sru# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1482163302Sru# 2005-07-21 Chronicle-Journal, which said: 1483163302Sru# 1484163302Sru# The clocks in Atikokan stay set on standard time year-round. 1485163302Sru# This means they spend about half the time on central time and 1486163302Sru# the other half on eastern time. 1487163302Sru# 1488163302Sru# For the most part, the system works, Mayor Dennis Brown said. 1489163302Sru# 1490163302Sru# "The majority of businesses in Atikokan deal more with Eastern 1491163302Sru# Canada, but there are some that deal with Western Canada," he 1492163302Sru# said. "I don't see any changes happening here." 1493163302Sru# 1494163302Sru# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1495163302Sru# [New Osnaburgh] follow the same practice." 149667578Swollman 1497163302Sru# From Garry McKinnon (2006-07-14) via Chris Walton: 1498163302Sru# I chatted with a member of my board who has an outstanding memory 1499163302Sru# and a long history in Atikokan (and in the telecom industry) and he 1500163302Sru# can say for certain that Atikokan has been practicing the current 1501163302Sru# time keeping since 1952, at least. 1502163302Sru 1503163302Sru# From Paul Eggert (2006-07-17): 1504163302Sru# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1505163302Sru# ever since standard time was introduced, but the information from 1506163302Sru# McKinnon sounds more authoritative. For now, assume that Atikokan 1507163302Sru# switched to EST immediately after WWII era daylight saving time 1508163302Sru# ended. This matches the old (less-populous) America/Coral_Harbour 1509163302Sru# entry since our cutoff date of 1970, so we can move 1510163302Sru# America/Coral_Harbour to the 'backward' file. 1511163302Sru 1512210718Sedwin# From Mark Brader (2010-03-06): 1513210718Sedwin# 1514210718Sedwin# Currently the database has: 1515210718Sedwin# 1516210718Sedwin# # Ontario 1517210718Sedwin# 1518210718Sedwin# # From Paul Eggert (2006-07-09): 1519210718Sedwin# # Shanks & Pottenger write that since 1970 most of Ontario has been like 1520210718Sedwin# # Toronto. 1521210718Sedwin# # Thunder Bay skipped DST in 1973. 1522210718Sedwin# # Many smaller locales did not observe peacetime DST until 1974; 1523210718Sedwin# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1524210718Sedwin# 1525210718Sedwin# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1526210718Sedwin# right corner of page 1, it says that Toronto will return to standard 1527210718Sedwin# time at 2 am Sunday morning (which agrees with the database), and that: 1528210718Sedwin# 1529210718Sedwin# The one-hour setback will go into effect throughout most of Ontario, 1530210718Sedwin# except in areas like Windsor which remains on standard time all year. 1531210718Sedwin# 1532210718Sedwin# Windsor is, of course, a lot larger than Nipigon. 1533210718Sedwin# 1534210718Sedwin# I only came across this incidentally. I don't know if Windsor began 1535210718Sedwin# observing DST when Detroit did, or in 1974, or on some other date. 1536210718Sedwin# 1537210718Sedwin# By the way, the article continues by noting that: 1538210718Sedwin# 1539210718Sedwin# Some cities in the United States have pushed the deadline back 1540210718Sedwin# three weeks and will change over from daylight saving in October. 1541210718Sedwin 1542210718Sedwin# From Arthur David Olson (2010-07-17): 1543210718Sedwin# 1544210718Sedwin# "Standard Time and Time Zones in Canada" appeared in 1545210718Sedwin# The Journal of The Royal Astronomical Society of Canada, 1546210718Sedwin# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1547210718Sedwin# was available at 1548210718Sedwin# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1549210718Sedwin# 1550210718Sedwin# It includes the text below (starting on page 57): 1551210718Sedwin# 1552210718Sedwin# A list of the places in Canada using daylight saving time would 1553210718Sedwin# require yearly revision. From information kindly furnished by 1554210718Sedwin# the provincial governments and by the postmasters in many cities 1555210718Sedwin# and towns, it is found that the following places used daylight sav- 1556210718Sedwin# ing in 1930. The information for the province of Quebec is definite, 1557210718Sedwin# for the other provinces only approximate: 1558210718Sedwin# 1559309568Sglebius# Province Daylight saving time used 1560210718Sedwin# Prince Edward Island Not used. 1561210718Sedwin# Nova Scotia In Halifax only. 1562210718Sedwin# New Brunswick In St. John only. 1563210718Sedwin# Quebec In the following places: 1564309568Sglebius# Montreal Lachine 1565309568Sglebius# Quebec Mont-Royal 1566309568Sglebius# L��vis Iberville 1567309568Sglebius# St. Lambert Cap de la Madel��ine 1568309568Sglebius# Verdun Loretteville 1569309568Sglebius# Westmount Richmond 1570309568Sglebius# Outremont St. J��r��me 1571309568Sglebius# Longueuil Greenfield Park 1572309568Sglebius# Arvida Waterloo 1573309568Sglebius# Chambly-Canton Beaulieu 1574309568Sglebius# Melbourne La Tuque 1575309568Sglebius# St. Th��ophile Buckingham 1576210718Sedwin# Ontario Used generally in the cities and towns along 1577309568Sglebius# the southerly part of the province. Not 1578309568Sglebius# used in the northwesterly part. 1579210718Sedwin# Manitoba Not used. 1580210718Sedwin# Saskatchewan In Regina only. 1581210718Sedwin# Alberta Not used. 1582210718Sedwin# British Columbia Not used. 1583210718Sedwin# 1584210718Sedwin# With some exceptions, the use of daylight saving may be said to be limited 1585210718Sedwin# to those cities and towns lying between Quebec city and Windsor, Ont. 1586210718Sedwin 15872742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1588121098SwollmanRule Toronto 1919 only - Mar 30 23:30 1:00 D 1589121098SwollmanRule Toronto 1919 only - Oct 26 0:00 0 S 1590121098SwollmanRule Toronto 1920 only - May 2 2:00 1:00 D 1591121098SwollmanRule Toronto 1920 only - Sep 26 0:00 0 S 1592121098SwollmanRule Toronto 1921 only - May 15 2:00 1:00 D 1593121098SwollmanRule Toronto 1921 only - Sep 15 2:00 0 S 1594121098SwollmanRule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1595158421Swollman# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1596158421Swollman# was meant. 1597121098SwollmanRule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1598121098SwollmanRule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1599136638Swollman# The 1927-to-1939 rules can be expressed more simply as 1600136638Swollman# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1601136638Swollman# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1602136638Swollman# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1603136638Swollman# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1604136638Swollman# The rules below avoid use of Sun>=25 1605136638Swollman# (which pre-2004 versions of zic cannot handle). 1606136638SwollmanRule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1607136638SwollmanRule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1608136638SwollmanRule Toronto 1932 only - May 1 2:00 1:00 D 1609136638SwollmanRule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1610136638SwollmanRule Toronto 1933 only - Oct 1 2:00 0 S 1611136638SwollmanRule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1612121098SwollmanRule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1613121098SwollmanRule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1614121098SwollmanRule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1615121098SwollmanRule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1616121098SwollmanRule Toronto 1949 only - Nov lastSun 0:00 0 S 1617121098SwollmanRule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1618121098SwollmanRule Toronto 1950 only - Nov lastSun 2:00 0 S 1619121098SwollmanRule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1620158421Swollman# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1621163302Sru# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1622163302Sru# is wrong, and that he had confirmed it by checking the 1971-10-30 1623163302Sru# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1624121098SwollmanRule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1625121098Swollman 1626121098Swollman# From Paul Eggert (2003-07-27): 1627121098Swollman# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1628121098Swollman# Port Arthur, Ontario, the principle of the Bill has been in 1629121098Swollman# operation for the past three years, and in the City of Moose Jaw, 1630136638Swollman# Saskatchewan, for one year." 1631121098Swollman 1632136638Swollman# From David Bryan via Tory Tronrud, Director/Curator, 1633136638Swollman# Thunder Bay Museum (2003-11-12): 1634136638Swollman# There is some suggestion, however, that, by-law or not, daylight 1635136638Swollman# savings time was being practiced in Fort William and Port Arthur 1636136638Swollman# before 1909.... [I]n 1910, the line between the Eastern and Central 1637136638Swollman# Time Zones was permanently moved about two hundred miles west to 1638136638Swollman# include the Thunder Bay area.... When Canada adopted daylight 1639136638Swollman# savings time in 1916, Fort William and Port Arthur, having done so 1640136638Swollman# already, did not change their clocks.... During the Second World 1641136638Swollman# War,... [t]he cities agreed to implement DST during the summer 1642136638Swollman# months for the remainder of the war years. 1643136638Swollman 16442742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1645121098SwollmanZone America/Toronto -5:17:32 - LMT 1895 1646121098Swollman -5:00 Canada E%sT 1919 1647309568Sglebius -5:00 Toronto E%sT 1942 Feb 9 2:00s 1648121098Swollman -5:00 Canada E%sT 1946 1649121098Swollman -5:00 Toronto E%sT 1974 1650121098Swollman -5:00 Canada E%sT 165117200SwollmanZone America/Thunder_Bay -5:57:00 - LMT 1895 1652136638Swollman -6:00 - CST 1910 1653136638Swollman -5:00 - EST 1942 165417200Swollman -5:00 Canada E%sT 1970 1655257682Sedwin -5:00 Toronto E%sT 1973 165617200Swollman -5:00 - EST 1974 165717200Swollman -5:00 Canada E%sT 165817200SwollmanZone America/Nipigon -5:53:04 - LMT 1895 1659121098Swollman -5:00 Canada E%sT 1940 Sep 29 1660309568Sglebius -5:00 1:00 EDT 1942 Feb 9 2:00s 166117200Swollman -5:00 Canada E%sT 1662163302SruZone America/Rainy_River -6:18:16 - LMT 1895 1663121098Swollman -6:00 Canada C%sT 1940 Sep 29 1664309568Sglebius -6:00 1:00 CDT 1942 Feb 9 2:00s 166517200Swollman -6:00 Canada C%sT 1666163302SruZone America/Atikokan -6:06:28 - LMT 1895 1667163302Sru -6:00 Canada C%sT 1940 Sep 29 1668309568Sglebius -6:00 1:00 CDT 1942 Feb 9 2:00s 1669309568Sglebius -6:00 Canada C%sT 1945 Sep 30 2:00 1670163302Sru -5:00 - EST 16712742Swollman 16728029Swollman 167317200Swollman# Manitoba 167419878Swollman 1675158421Swollman# From Rob Douglas (2006-04-06): 1676158421Swollman# the old Manitoba Time Act - as amended by Bill 2, assented to 1677158421Swollman# March 27, 1987 ... said ... 1678158421Swollman# "between two o'clock Central Standard Time in the morning of 1679158421Swollman# the first Sunday of April of each year and two o'clock Central 1680158421Swollman# Standard Time in the morning of the last Sunday of October next 1681158421Swollman# following, one hour in advance of Central Standard Time."... 1682273438Sdelphij# I believe that the English legislation [of the old time act] had 1683158421Swollman# been assented to (March 22, 1967).... 1684158421Swollman# Also, as far as I can tell, there was no order-in-council varying 1685158421Swollman# the time of Daylight Saving Time for 2005 and so the provisions of 1686158421Swollman# the 1987 version would apply - the changeover was at 2:00 Central 1687158421Swollman# Standard Time (i.e. not until 3:00 Central Daylight Time). 1688158421Swollman 1689158421Swollman# From Paul Eggert (2006-04-10): 1690158421Swollman# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1691158421Swollman# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1692158421Swollman# it was also 02:00s in 1966. 1693158421Swollman 16942742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16952742SwollmanRule Winn 1916 only - Apr 23 0:00 1:00 D 16962742SwollmanRule Winn 1916 only - Sep 17 0:00 0 S 16972742SwollmanRule Winn 1918 only - Apr 14 2:00 1:00 D 1698233447SedwinRule Winn 1918 only - Oct 27 2:00 0 S 16992742SwollmanRule Winn 1937 only - May 16 2:00 1:00 D 170014343SwollmanRule Winn 1937 only - Sep 26 2:00 0 S 1701121098SwollmanRule Winn 1942 only - Feb 9 2:00 1:00 W # War 1702121098SwollmanRule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 17032742SwollmanRule Winn 1945 only - Sep lastSun 2:00 0 S 17042742SwollmanRule Winn 1946 only - May 12 2:00 1:00 D 17052742SwollmanRule Winn 1946 only - Oct 13 2:00 0 S 17062742SwollmanRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 170714343SwollmanRule Winn 1947 1949 - Sep lastSun 2:00 0 S 170814343SwollmanRule Winn 1950 only - May 1 2:00 1:00 D 170914343SwollmanRule Winn 1950 only - Sep 30 2:00 0 S 171014343SwollmanRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 171114343SwollmanRule Winn 1951 1958 - Sep lastSun 2:00 0 S 17122742SwollmanRule Winn 1959 only - Oct lastSun 2:00 0 S 17132742SwollmanRule Winn 1960 only - Sep lastSun 2:00 0 S 17142742SwollmanRule Winn 1963 only - Apr lastSun 2:00 1:00 D 171514343SwollmanRule Winn 1963 only - Sep 22 2:00 0 S 1716158421SwollmanRule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1717158421SwollmanRule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1718158421SwollmanRule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 17192742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17202742SwollmanZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1721158421Swollman -6:00 Winn C%sT 2006 1722158421Swollman -6:00 Canada C%sT 17232742Swollman 17248029Swollman 172517200Swollman# Saskatchewan 172617200Swollman 1727121098Swollman# From Mark Brader (2003-07-26): 1728121098Swollman# The first actual adoption of DST in Canada was at the municipal 1729121098Swollman# level. As the [Toronto] Star put it (1912-06-07), "While people 1730121098Swollman# elsewhere have long been talking of legislation to save daylight, 1731121098Swollman# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1732121098Swollman# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1733121098Swollman# presumably late evening, as below), and would run until "the end of 1734121098Swollman# the summer". The discrepancy between municipal time and railroad 1735121098Swollman# time was noted. 1736121098Swollman 1737121098Swollman# From Paul Eggert (2003-07-27): 1738121098Swollman# Willett (1914-03) notes that DST "has been in operation ... in the 1739121098Swollman# City of Moose Jaw, Saskatchewan, for one year." 1740121098Swollman 1741158421Swollman# From Paul Eggert (2006-03-22): 1742158421Swollman# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 174317200Swollman# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 174417200Swollman# Other western towns (e.g. Lloydminster) are like Edmonton. 174567578Swollman# Matthews and Vincent (1998) write that Denare Beach and Creighton 174667578Swollman# are like Winnipeg, in violation of Saskatchewan law. 174717200Swollman 1748149514Swollman# From W. Jones (1992-11-06): 174917200Swollman# The. . .below is based on information I got from our law library, the 175017200Swollman# provincial archives, and the provincial Community Services department. 175117200Swollman# A precise history would require digging through newspaper archives, and 175217200Swollman# since you didn't say what you wanted, I didn't bother. 175317200Swollman# 175417200Swollman# Saskatchewan is split by a time zone meridian (105W) and over the years 175517200Swollman# the boundary became pretty ragged as communities near it reevaluated 175617200Swollman# their affiliations in one direction or the other. In 1965 a provincial 175717200Swollman# referendum favoured legislating common time practices. 175817200Swollman# 175917200Swollman# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 176017200Swollman# Saskatchewan 1978) was proclaimed, and established that the eastern 176117200Swollman# part of Saskatchewan would use CST year round, that districts in 176217200Swollman# northwest Saskatchewan would by default follow CST but could opt to 176317200Swollman# follow Mountain Time rules (thus 1 hour difference in the winter and 176417200Swollman# zero in the summer), and that districts in southwest Saskatchewan would 176517200Swollman# by default follow MT but could opt to follow CST. 176617200Swollman# 176717200Swollman# It took a few years for the dust to settle (I know one story of a town 176817200Swollman# on one time zone having its school in another, such that a mom had to 176917200Swollman# serve her family lunch in two shifts), but presently it seems that only 177017200Swollman# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 177117200Swollman# rules any more; all other districts appear to have used CST year round 177217200Swollman# since sometime in the 1960s. 177317200Swollman 1774163302Sru# From Chris Walton (2006-06-26): 1775163302Sru# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1776163302Sru# long and rather painful to read. 1777163302Sru# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1778163302Sru 17792742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17802742SwollmanRule Regina 1918 only - Apr 14 2:00 1:00 D 1781233447SedwinRule Regina 1918 only - Oct 27 2:00 0 S 17822742SwollmanRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 17832742SwollmanRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 17842742SwollmanRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 17852742SwollmanRule Regina 1937 only - Oct Sun>=8 0:00 0 S 17862742SwollmanRule Regina 1938 only - Oct Sun>=1 0:00 0 S 17872742SwollmanRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1788121098SwollmanRule Regina 1942 only - Feb 9 2:00 1:00 W # War 1789121098SwollmanRule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 17902742SwollmanRule Regina 1945 only - Sep lastSun 2:00 0 S 179117200SwollmanRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 179217200SwollmanRule Regina 1946 only - Oct Sun>=8 2:00 0 S 1793121098SwollmanRule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1794121098SwollmanRule Regina 1947 1957 - Sep lastSun 2:00 0 S 1795121098SwollmanRule Regina 1959 only - Apr lastSun 2:00 1:00 D 179617200SwollmanRule Regina 1959 only - Oct lastSun 2:00 0 S 179717200Swollman# 179817200SwollmanRule Swift 1957 only - Apr lastSun 2:00 1:00 D 179917200SwollmanRule Swift 1957 only - Oct lastSun 2:00 0 S 180017200SwollmanRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 180117200SwollmanRule Swift 1959 only - Oct lastSun 2:00 0 S 180217200SwollmanRule Swift 1960 1961 - Sep lastSun 2:00 0 S 18032742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 180417200SwollmanZone America/Regina -6:58:36 - LMT 1905 Sep 1805309568Sglebius -7:00 Regina M%sT 1960 Apr lastSun 2:00 18062742Swollman -6:00 - CST 180717200SwollmanZone America/Swift_Current -7:11:20 - LMT 1905 Sep 1808309568Sglebius -7:00 Canada M%sT 1946 Apr lastSun 2:00 180917200Swollman -7:00 Regina M%sT 1950 1810309568Sglebius -7:00 Swift M%sT 1972 Apr lastSun 2:00 181117200Swollman -6:00 - CST 18122742Swollman 18138029Swollman 181417200Swollman# Alberta 181517200Swollman 18162742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 18172742SwollmanRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1818233447SedwinRule Edm 1918 only - Oct 27 2:00 0 S 18192742SwollmanRule Edm 1919 only - May 27 2:00 0 S 18202742SwollmanRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 18212742SwollmanRule Edm 1920 only - Oct lastSun 2:00 0 S 18222742SwollmanRule Edm 1921 1923 - Sep lastSun 2:00 0 S 1823121098SwollmanRule Edm 1942 only - Feb 9 2:00 1:00 W # War 1824121098SwollmanRule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 18252742SwollmanRule Edm 1945 only - Sep lastSun 2:00 0 S 18262742SwollmanRule Edm 1947 only - Apr lastSun 2:00 1:00 D 18272742SwollmanRule Edm 1947 only - Sep lastSun 2:00 0 S 18282742SwollmanRule Edm 1967 only - Apr lastSun 2:00 1:00 D 18292742SwollmanRule Edm 1967 only - Oct lastSun 2:00 0 S 18302742SwollmanRule Edm 1969 only - Apr lastSun 2:00 1:00 D 18312742SwollmanRule Edm 1969 only - Oct lastSun 2:00 0 S 18322742SwollmanRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1833158421SwollmanRule Edm 1972 2006 - Oct lastSun 2:00 0 S 18342742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18352742SwollmanZone America/Edmonton -7:33:52 - LMT 1906 Sep 1836158421Swollman -7:00 Edm M%sT 1987 1837158421Swollman -7:00 Canada M%sT 18382742Swollman 18398029Swollman 184017200Swollman# British Columbia 184117200Swollman 1842158421Swollman# From Paul Eggert (2006-03-22): 1843158421Swollman# Shanks & Pottenger write that since 1970 most of this region has 1844158421Swollman# been like Vancouver. 184558787Sru# Dawson Creek uses MST. Much of east BC is like Edmonton. 184667578Swollman# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 184717200Swollman 1848233447Sedwin# It seems though that (re: Creston) is not entirely correct: 1849233447Sedwin 1850233447Sedwin# From Chris Walton (2011-12-01): 1851233447Sedwin# There are two areas within the Canadian province of British Columbia 1852233447Sedwin# that do not currently observe daylight saving: 1853233447Sedwin# a) The Creston Valley (includes the town of Creston and surrounding area) 1854233447Sedwin# b) The eastern half of the Peace River Regional District 1855233447Sedwin# (includes the cities of Dawson Creek and Fort St. John) 1856233447Sedwin 1857233447Sedwin# Earlier this year I stumbled across a detailed article about the time 1858233447Sedwin# keeping history of Creston; it was written by Tammy Hardwick who is the 1859233447Sedwin# manager of the Creston & District Museum. The article was written in May 2009. 1860233447Sedwin# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1861233447Sedwin# According to the article, Creston has not changed its clocks since June 1918. 1862233447Sedwin# i.e. Creston has been stuck on UTC-7 for 93 years. 1863233447Sedwin# Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1864233447Sedwin 1865233447Sedwin# Unfortunately the exact date for the time change in June 1918 remains 1866233447Sedwin# unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1867233447Sedwin# ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1868309568Sglebius# as plausible as any other date (in June). She also said that after writing 1869309568Sglebius# the article she had discovered another time change in 1916; this is the 1870309568Sglebius# subject of another article which she wrote in October 2010. 1871233447Sedwin# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1872233447Sedwin 1873233447Sedwin# Here is a summary of the three clock change events in Creston's history: 1874233447Sedwin# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1875233447Sedwin# Exact date unknown 1876240461Sedwin# 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1877309568Sglebius# Exact date in October unknown; Sunday October 1 is a reasonable guess. 1878233447Sedwin# 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1879233447Sedwin# Exact date in June unknown; Sunday June 2 is a reasonable guess. 1880309568Sglebius# note 1: 1881233447Sedwin# On Oct 27/1918 when daylight saving ended in the rest of Canada, 1882233447Sedwin# Creston did not change its clocks. 1883309568Sglebius# note 2: 1884233447Sedwin# During WWII when the Federal Government legislated a mandatory clock change, 1885233447Sedwin# Creston did not oblige. 1886309568Sglebius# note 3: 1887233447Sedwin# There is no guarantee that Creston will remain on Mountain Standard Time 1888233447Sedwin# (UTC-7) forever. 1889233447Sedwin# The subject was debated at least once this year by the town Council. 1890233447Sedwin# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1891233447Sedwin 1892233447Sedwin# During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1893233447Sedwin# In Creston, that was handled by shifting the area to PST (-8:00) then applying 1894233447Sedwin# summer time to cause the offset to be -7:00, the same as it had been before 1895233447Sedwin# the change. It can be argued that the timezone abbreviation during this 1896233447Sedwin# period should be PDT rather than MST, but that doesn't seem important enough 1897233447Sedwin# (to anyone) to further complicate the rules. 1898233447Sedwin 1899233447Sedwin# The transition dates (and times) are guesses. 1900233447Sedwin 1901309568Sglebius# From Matt Johnson (2015-09-21): 1902309568Sglebius# Fort Nelson, BC, Canada will cancel DST this year. So while previously they 1903309568Sglebius# were aligned with America/Vancouver, they're now aligned with 1904309568Sglebius# America/Dawson_Creek. 1905309568Sglebius# http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html 1906309568Sglebius# 1907309568Sglebius# From Tim Parenti (2015-09-23): 1908309568Sglebius# This requires a new zone for the Northern Rockies Regional Municipality, 1909309568Sglebius# America/Fort_Nelson. The resolution of 2014-12-08 was reached following a 1910309568Sglebius# 2014-11-15 poll with nearly 75% support. Effectively, the municipality has 1911309568Sglebius# been on MST (-0700) like Dawson Creek since it advanced its clocks on 1912309568Sglebius# 2015-03-08. 1913309568Sglebius# 1914309568Sglebius# From Paul Eggert (2015-09-23): 1915309568Sglebius# Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver. 1916309568Sglebius 19172742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 19182742SwollmanRule Vanc 1918 only - Apr 14 2:00 1:00 D 1919233447SedwinRule Vanc 1918 only - Oct 27 2:00 0 S 1920121098SwollmanRule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1921121098SwollmanRule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 19222742SwollmanRule Vanc 1945 only - Sep 30 2:00 0 S 19232742SwollmanRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 19242742SwollmanRule Vanc 1946 only - Oct 13 2:00 0 S 19252742SwollmanRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1926158421SwollmanRule Vanc 1962 2006 - Oct lastSun 2:00 0 S 19272742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19282742SwollmanZone America/Vancouver -8:12:28 - LMT 1884 1929158421Swollman -8:00 Vanc P%sT 1987 1930158421Swollman -8:00 Canada P%sT 193117200SwollmanZone America/Dawson_Creek -8:00:56 - LMT 1884 193217200Swollman -8:00 Canada P%sT 1947 1933309568Sglebius -8:00 Vanc P%sT 1972 Aug 30 2:00 193417200Swollman -7:00 - MST 1935309568SglebiusZone America/Fort_Nelson -8:10:47 - LMT 1884 1936309568Sglebius -8:00 Vanc P%sT 1946 1937309568Sglebius -8:00 - PST 1947 1938309568Sglebius -8:00 Vanc P%sT 1987 1939309568Sglebius -8:00 Canada P%sT 2015 Mar 8 2:00 1940309568Sglebius -7:00 - MST 1941233447SedwinZone America/Creston -7:46:04 - LMT 1884 1942233447Sedwin -7:00 - MST 1916 Oct 1 1943233447Sedwin -8:00 - PST 1918 Jun 2 1944233447Sedwin -7:00 - MST 19452742Swollman 194658787Sru# Northwest Territories, Nunavut, Yukon 194717200Swollman 1948158421Swollman# From Paul Eggert (2006-03-22): 194917200Swollman# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1950149514Swollman# Mathew Englander (1996-10-07) gives the following refs: 195120094Swollman# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1952309568Sglebius# c. 7 defines Yukon standard time as UTC-9.... 195320094Swollman# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1954309568Sglebius# [http://canlii.ca/t/7vhg] 195520094Swollman# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 195620094Swollman# * O.I.C. 1980/02 established DST. 195720094Swollman# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 195817200Swollman 1959309568Sglebius# From Brian Inglis (2015-04-14): 1960309568Sglebius# 1961309568Sglebius# I tried to trace the history of Yukon time and found the following 1962309568Sglebius# regulations, giving the reference title and URL if found, regulation name, 1963309568Sglebius# and relevant quote if available. Each regulation specifically revokes its 1964309568Sglebius# predecessor. The final reference is to the current Interpretation Act 1965309568Sglebius# authorizing and resulting from these regulatory changes. 1966309568Sglebius# 1967309568Sglebius# Only recent regulations were retrievable via Yukon government site search or 1968309568Sglebius# index, and only some via Canadian legal sources. Other sources used include 1969309568Sglebius# articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS 1970309568Sglebius# Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and 1971309568Sglebius# 1970 quoted below; each article includes current extracts from provincial 1972309568Sglebius# and territorial ST and DST regulations at the end, summaries and details of 1973309568Sglebius# standard times and daylight saving time at many locations across Canada, 1974309568Sglebius# with time zone maps, tables and calculations for Canadian Sunrise, Sunset, 1975309568Sglebius# and LMST; they also cover many countries and global locations, with a chart 1976309568Sglebius# and table showing current Universal Time offsets, and may be useful as 1977309568Sglebius# another source of information for 1970 and earlier. 1978309568Sglebius# 1979309568Sglebius# * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26, 1980309568Sglebius# pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS) 1981309568Sglebius# http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75: 1982309568Sglebius# Yukon Interpretation Ordinance 1983309568Sglebius# Yukon standard time is the local mean time at the one hundred and 1984309568Sglebius# thirty-fifth meridian. 1985309568Sglebius# 1986309568Sglebius# * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.; 1987309568Sglebius# JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System 1988309568Sglebius# (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1: 1989309568Sglebius# Yukon Interpretation Ordinance, 1955, Chap. 16. 1990309568Sglebius# 1991309568Sglebius# (1) Subject to this section, standard time shall be reckoned as nine 1992309568Sglebius# hours behind Greenwich Time and called Yukon Standard Time. 1993309568Sglebius# 1994309568Sglebius# (2) Notwithstanding subsection (1), the Commissioner may make regulations 1995309568Sglebius# varying the manner of reckoning standard time. 1996309568Sglebius# 1997309568Sglebius# * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance 1998309568Sglebius# http://? - no online source found 1999309568Sglebius# 2000309568Sglebius# * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC, 2001309568Sglebius# Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS) 2002309568Sglebius# http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon 2003309568Sglebius# Territory Commissioner's Order 1967-59 Interpretation Ordinance ... 2004309568Sglebius# 2005309568Sglebius# 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon 2006309568Sglebius# Territory on 27th January, 1966, is hereby revoked. 2007309568Sglebius# 2008309568Sglebius# 2. Yukon (East) Standard Time as defined by section 36 of the 2009309568Sglebius# Interpretation Ordinance from and after mid-night on the 28th day of May, 2010309568Sglebius# 1967 shall be reckoned in the same manner as Pacific Standard Time, that 2011309568Sglebius# is to say, eight hours behind Greenwich Time in the area of the Yukon 2012309568Sglebius# Territory lying east of the 138th degree longitude west. 2013309568Sglebius# 2014309568Sglebius# 3. In the remainder of the Territory, lying west of the 138th degree 2015309568Sglebius# longitude west, Yukon (West) Standard Time shall be reckoned as nine 2016309568Sglebius# hours behind Greenwich Time. 2017309568Sglebius# 2018309568Sglebius# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214 2019309568Sglebius# http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html 2020309568Sglebius# C.O. 1973/214 INTERPRETATION ACT ... 2021309568Sglebius# 2022309568Sglebius# 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby 2023309568Sglebius# revoked. 2024309568Sglebius# 2025309568Sglebius# 2. Yukon Standard Time as defined by section 36 of the Interpretation 2026309568Sglebius# Act from and after midnight on the twenty-eighth day of October, 1973 2027309568Sglebius# shall be reckoned in the same manner as Pacific Standard Time, that is 2028309568Sglebius# to say eight hours behind Greenwich Time. 2029309568Sglebius# 2030309568Sglebius# * O.I.C. 1980/02 INTERPRETATION ACT 2031309568Sglebius# http://? - no online source found 2032309568Sglebius# 2033309568Sglebius# * Yukon Daylight Saving Time, YOIC 1987/56 2034309568Sglebius# http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html 2035309568Sglebius# O.I.C. 1987/056 INTERPRETATION ACT ... 2036309568Sglebius# 2037309568Sglebius# In every year between 2038309568Sglebius# (a) two o'clock in the morning in the first Sunday in April, and 2039309568Sglebius# (b) two o'clock in the morning in the last Sunday in October, 2040309568Sglebius# Standard Time shall be reckoned as seven hours behind Greenwich Time and 2041309568Sglebius# called Yukon Daylight Saving Time. 2042309568Sglebius# ... 2043309568Sglebius# Dated ... 9th day of March, A.D., 1987. 2044309568Sglebius# 2045309568Sglebius# * Yukon Daylight Saving Time 2006, YOIC 2006/127 2046309568Sglebius# http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html 2047309568Sglebius# O.I.C. 2006/127 INTERPRETATION ACT ... 2048309568Sglebius# 2049309568Sglebius# 1. In Yukon each year the time for general purposes shall be 7 hours 2050309568Sglebius# behind Greenwich mean time during the period commencing at two o'clock 2051309568Sglebius# in the forenoon on the second Sunday of March and ending at two o'clock 2052309568Sglebius# in the forenoon on the first Sunday of November and shall be called 2053309568Sglebius# Yukon Daylight Saving Time. 2054309568Sglebius# 2055309568Sglebius# 2. Order-in-Council 1987/56 is revoked. 2056309568Sglebius# 2057309568Sglebius# 3. This order comes into force January 1, 2007. 2058309568Sglebius# 2059309568Sglebius# * Interpretation Act, RSY 2002, c 125 2060309568Sglebius# http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html 2061309568Sglebius 206258787Sru# From Rives McDow (1999-09-04): 206358787Sru# Nunavut ... moved ... to incorporate the whole territory into one time zone. 206458787Sru# Nunavut moves to single time zone Oct. 31 2065309568Sglebius# http://www.nunatsiaq.com/nunavut/nvt90903_13.html 206658787Sru# 206758787Sru# From Antoine Leca (1999-09-06): 206858787Sru# We then need to create a new timezone for the Kitikmeot region of Nunavut 206958787Sru# to differentiate it from the Yellowknife region. 207058787Sru 207158787Sru# From Paul Eggert (1999-09-20): 207258787Sru# Basic Facts: The New Territory 2073309568Sglebius# http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html 2074273438Sdelphij# (1999) reports that Pangnirtung operates on eastern time, 207558787Sru# and that Coral Harbour does not observe DST. We don't know when 207686222Swollman# Pangnirtung switched to eastern time; we'll guess 1995. 207758787Sru 207858787Sru# From Rives McDow (1999-11-08): 207958787Sru# On October 31, when the rest of Nunavut went to Central time, 208058787Sru# Pangnirtung wobbled. Here is the result of their wobble: 208158787Sru# 208258787Sru# The following businesses and organizations in Pangnirtung use Central Time: 208358787Sru# 208458787Sru# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 208558787Sru# Eastern Arctic National Parks, A & D Specialist 208658787Sru# 208758787Sru# The following businesses and organizations in Pangnirtung use Eastern Time: 208858787Sru# 208958787Sru# Hamlet office, All other businesses, Both schools, Airport operator 209058787Sru# 209158787Sru# This has made for an interesting situation there, which warranted the news. 209258787Sru# No one there that I spoke with seems concerned, or has plans to 209358787Sru# change the local methods of keeping time, as it evidently does not 209458787Sru# really interfere with any activities or make things difficult locally. 209558787Sru# They plan to celebrate New Year's turn-over twice, one hour apart, 209658787Sru# so it appears that the situation will last at least that long. 209758787Sru# The Nunavut Intergovernmental Affairs hopes that they will "come to 209858787Sru# their senses", but the locals evidently don't see any problem with 209958787Sru# the current state of affairs. 210058787Sru 210158787Sru# From Michaela Rodrigue, writing in the 2102309568Sglebius# Nunatsiaq News (1999-11-19): 2103309568Sglebius# http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html 210458787Sru# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 210558787Sru# central - or Nunavut time - for government offices, and eastern time 210658787Sru# for municipal offices and schools.... Igloolik [was similar but then] 210758787Sru# made the switch to central time on Saturday, Nov. 6. 210858787Sru 210967578Swollman# From Paul Eggert (2000-10-02): 211067578Swollman# Matthews and Vincent (1998) say the following, but we lack histories 211167578Swollman# for these potential new Zones. 211275267Swollman# 211367578Swollman# The Canadian Forces station at Alert uses Eastern Time while the 211467578Swollman# handful of residents at the Eureka weather station [in the Central 211567578Swollman# zone] skip daylight savings. Baffin Island, which is crossed by the 211667578Swollman# Central, Eastern and Atlantic Time zones only uses Eastern Time. 211767578Swollman# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 211867578Swollman# Central Time and Southampton Island [in the Central zone] is not 211967578Swollman# required to use daylight savings. 212067578Swollman 2121273438Sdelphij# From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html> 2122273438Sdelphij# Nunavut now has two time zones (2000-11-10): 212375267Swollman# The Nunavut government would allow its employees in Kugluktuk and 212475267Swollman# Cambridge Bay to operate on central time year-round, putting them 212575267Swollman# one hour behind the rest of Nunavut for six months during the winter. 212675267Swollman# At the end of October the two communities had rebelled against 212775267Swollman# Nunavut's unified time zone, refusing to shift to eastern time with 212875267Swollman# the rest of the territory for the winter. Cambridge Bay remained on 212975267Swollman# central time, while Kugluktuk, even farther west, reverted to 213075267Swollman# mountain time, which they had used before the advent of Nunavut's 213175267Swollman# unified time zone in 1999. 213275267Swollman# 213375267Swollman# From Rives McDow (2001-01-20), quoting the Nunavut government: 213475267Swollman# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 213575267Swollman 213675267Swollman# From Paul Eggert (2000-12-04): 213775267Swollman# Let's just keep track of the official times for now. 213875267Swollman 213975267Swollman# From Rives McDow (2001-03-07): 214075267Swollman# The premier of Nunavut has issued a ministerial statement advising 214175267Swollman# that effective 2001-04-01, the territory of Nunavut will revert 214275267Swollman# back to three time zones (mountain, central, and eastern). Of the 214375267Swollman# cities in Nunavut, Coral Harbor is the only one that I know of that 214475267Swollman# has said it will not observe dst, staying on EST year round. I'm 214575267Swollman# checking for more info, and will get back to you if I come up with 214675267Swollman# more. 214775267Swollman# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 214875267Swollman 2149149514Swollman# From Gwillim Law (2005-05-21): 2150309568Sglebius# According to ... 2151149514Swollman# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2152149514Swollman# (from a 1998 Canadian Geographic article), the de facto and de jure time 2153149514Swollman# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2154149514Swollman# round. Using Google, it's easy to find other websites that confirm this. 2155149514Swollman# I wasn't able to find how far back this time regimen goes, but since it 2156149514Swollman# predates the creation of Nunavut, it probably goes back many years.... 2157149514Swollman# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2158149514Swollman# 2159309568Sglebius# From Paul Eggert (2014-10-17): 2160149514Swollman# For lack of better information, assume that Southampton Island observed 2161309568Sglebius# daylight saving only during wartime. Gwillim Law's email also 2162309568Sglebius# mentioned maps now maintained by National Research Council Canada; 2163309568Sglebius# see above for an up-to-date link. 2164149514Swollman 2165169811Swollman# From Chris Walton (2007-03-01): 2166169811Swollman# ... the community of Resolute (located on Cornwallis Island in 2167169811Swollman# Nunavut) moved from Central Time to Eastern Time last November. 2168169811Swollman# Basically the community did not change its clocks at the end of 2169169811Swollman# daylight saving.... 2170169811Swollman# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2171163302Sru 2172226298Sedwin# From Chris Walton (2011-03-21): 2173226298Sedwin# Back in 2007 I initiated the creation of a new "zone file" for Resolute 2174226298Sedwin# Bay. Resolute Bay is a small community located about 900km north of 2175226298Sedwin# the Arctic Circle. The zone file was required because Resolute Bay had 2176226298Sedwin# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2177169811Swollman# 2178226298Sedwin# According to new information which I received last week, Resolute Bay 2179226298Sedwin# went back to using UTC-6 in the winter of 2007-2008... 2180226298Sedwin# 2181226298Sedwin# On March 11/2007 most of Canada went onto daylight saving. On March 2182226298Sedwin# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2183226298Sedwin# talked to somebody that was both knowledgeable and helpful. I was able 2184226298Sedwin# to confirm that Resolute Bay was still operating on UTC-5. It was 2185226298Sedwin# explained to me that Resolute Bay had been on the Eastern Time zone 2186226298Sedwin# (EST) in the winter, and was now back on the Central Time zone (CDT). 2187226298Sedwin# i.e. the time zone had changed twice in the last year but the clocks 2188226298Sedwin# had not moved. The residents had to know which time zone they were in 2189226298Sedwin# so they could follow the correct TV schedule... 2190226298Sedwin# 2191226298Sedwin# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2192226298Sedwin# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2193226298Sedwin# of the phone call, I decided to seek out an alternate source of 2194226298Sedwin# information. I found an e-mail address for somebody by the name of 2195226298Sedwin# Stephanie Adams whose job was listed as "Inns North Support Officer for 2196226298Sedwin# Arctic Co-operatives." I was under the impression that Stephanie lived 2197226298Sedwin# and worked in Resolute Bay... 2198226298Sedwin# 2199226298Sedwin# On March 14/2011 I phoned the hamlet office again. I was told that 2200226298Sedwin# Resolute Bay had been using Central Standard Time over the winter of 2201226298Sedwin# 2010-2011 and that the clocks had therefore been moved one hour ahead 2202226298Sedwin# on March 13/2011. The person I talked to was aware that Resolute Bay 2203226298Sedwin# had previously experimented with Eastern Standard Time but he could not 2204226298Sedwin# tell me when the practice had stopped. 2205226298Sedwin# 2206226298Sedwin# On March 17/2011 I searched the Web to find an e-mail address of 2207226298Sedwin# somebody that might be able to tell me exactly when Resolute Bay went 2208226298Sedwin# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2209226298Sedwin# used to be the mayor of Resolute Bay and he apparently owns half the 2210226298Sedwin# businesses including "South Camp Inn." This website has some info on 2211226298Sedwin# Aziz: 2212226298Sedwin# http://www.uphere.ca/node/493 2213226298Sedwin# 2214226298Sedwin# I sent Aziz an e-mail asking when Resolute Bay had stopped using 2215226298Sedwin# Eastern Standard Time. 2216226298Sedwin# 2217226298Sedwin# Aziz responded quickly with this: "hi, The time was not changed for the 2218226298Sedwin# 1 year only, the following year, the community went back to the old way 2219226298Sedwin# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2220226298Sedwin# the winter Zulu plus 6 hrs" 2221226298Sedwin# 2222226298Sedwin# This of course conflicted with everything I had ascertained in November 2008. 2223226298Sedwin# 2224226298Sedwin# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2225226298Sedwin# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2226226298Sedwin# may want to check with the weather office in Resolute Bay or do a 2227226298Sedwin# search on the weather through Env. Canada. web site" 2228226298Sedwin# 2229226298Sedwin# If I had realized the Stephanie did not live in Resolute Bay I would 2230226298Sedwin# never have contacted her. I now believe that all the information I 2231226298Sedwin# obtained in November 2008 should be ignored... 2232226298Sedwin# I apologize for reporting incorrect information in 2008. 2233169811Swollman 22342742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 223517200SwollmanRule NT_YK 1918 only - Apr 14 2:00 1:00 D 223617200SwollmanRule NT_YK 1918 only - Oct 27 2:00 0 S 223717200SwollmanRule NT_YK 1919 only - May 25 2:00 1:00 D 223817200SwollmanRule NT_YK 1919 only - Nov 1 0:00 0 S 2239121098SwollmanRule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2240121098SwollmanRule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 224117200SwollmanRule NT_YK 1945 only - Sep 30 2:00 0 S 224217200SwollmanRule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 224317200SwollmanRule NT_YK 1965 only - Oct lastSun 2:00 0 S 224417200SwollmanRule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2245158421SwollmanRule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2246158421SwollmanRule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 22472742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2248169811Swollman# aka Panniqtuuq 2249309568SglebiusZone America/Pangnirtung 0 - -00 1921 # trading post est. 2250309568Sglebius -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2251309568Sglebius -5:00 Canada E%sT 1999 Oct 31 2:00 2252309568Sglebius -6:00 Canada C%sT 2000 Oct 29 2:00 225375267Swollman -5:00 Canada E%sT 2254169811Swollman# formerly Frobisher Bay 2255309568SglebiusZone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est. 2256309568Sglebius -5:00 NT_YK E%sT 1999 Oct 31 2:00 2257309568Sglebius -6:00 Canada C%sT 2000 Oct 29 2:00 225875267Swollman -5:00 Canada E%sT 2259169811Swollman# aka Qausuittuq 2260309568SglebiusZone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded 2261309568Sglebius -6:00 NT_YK C%sT 2000 Oct 29 2:00 2262309568Sglebius -5:00 - EST 2001 Apr 1 3:00 2263309568Sglebius -6:00 Canada C%sT 2006 Oct 29 2:00 2264309568Sglebius -5:00 - EST 2007 Mar 11 3:00 2265226298Sedwin -6:00 Canada C%sT 2266169811Swollman# aka Kangiqiniq 2267309568SglebiusZone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded 2268309568Sglebius -6:00 NT_YK C%sT 2000 Oct 29 2:00 2269309568Sglebius -5:00 - EST 2001 Apr 1 3:00 227058787Sru -6:00 Canada C%sT 2271169811Swollman# aka Iqaluktuuttiaq 2272309568SglebiusZone America/Cambridge_Bay 0 - -00 1920 # trading post est.? 2273309568Sglebius -7:00 NT_YK M%sT 1999 Oct 31 2:00 2274309568Sglebius -6:00 Canada C%sT 2000 Oct 29 2:00 2275309568Sglebius -5:00 - EST 2000 Nov 5 0:00 2276309568Sglebius -6:00 - CST 2001 Apr 1 3:00 227775267Swollman -7:00 Canada M%sT 2278309568SglebiusZone America/Yellowknife 0 - -00 1935 # Yellowknife founded? 2279158421Swollman -7:00 NT_YK M%sT 1980 2280158421Swollman -7:00 Canada M%sT 2281309568SglebiusZone America/Inuvik 0 - -00 1953 # Inuvik founded 2282309568Sglebius -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2283158421Swollman -7:00 NT_YK M%sT 1980 2284158421Swollman -7:00 Canada M%sT 22852742SwollmanZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2286309568Sglebius -9:00 NT_YK Y%sT 1967 May 28 0:00 2287158421Swollman -8:00 NT_YK P%sT 1980 2288158421Swollman -8:00 Canada P%sT 228917200SwollmanZone America/Dawson -9:17:40 - LMT 1900 Aug 20 2290309568Sglebius -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2291158421Swollman -8:00 NT_YK P%sT 1980 2292158421Swollman -8:00 Canada P%sT 22932742Swollman 22948029Swollman 22952742Swollman############################################################################### 22962742Swollman 22972742Swollman# Mexico 22982742Swollman 2299309568Sglebius# From Paul Eggert (2014-12-07): 230075267Swollman# The Investigation and Analysis Service of the 230175267Swollman# Mexican Library of Congress (MLoC) has published a 230275267Swollman# history of Mexican local time (in Spanish) 2303309568Sglebius# http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm 23042742Swollman# 2305158421Swollman# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 230675267Swollman# (In all cases we go with the MLoC.) 2307158421Swollman# S&P report that Baja was at -8:00 in 1922/1923. 2308158421Swollman# S&P say the 1930 transition in Baja was 1930-11-16. 2309158421Swollman# S&P report no DST during summer 1931. 2310158421Swollman# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 23112742Swollman 231275267Swollman# From Gwillim Law (2001-02-20): 231375267Swollman# There are some other discrepancies between the Decrees page and the 231475267Swollman# tz database. I think they can best be explained by supposing that 231575267Swollman# the researchers who prepared the Decrees page failed to find some of 231675267Swollman# the relevant documents. 231775267Swollman 2318149514Swollman# From Alan Perry (1996-02-15): 231917200Swollman# A guy from our Mexico subsidiary finally found the Presidential Decree 232017200Swollman# outlining the timezone changes in Mexico. 232158787Sru# 232217200Swollman# ------------- Begin Forwarded Message ------------- 232358787Sru# 232417200Swollman# I finally got my hands on the Official Presidential Decree that sets up the 232517200Swollman# rules for the DST changes. The rules are: 232658787Sru# 232717200Swollman# 1. The country is divided in 3 timezones: 232817200Swollman# - Baja California Norte (the Mexico/BajaNorte TZ) 232917200Swollman# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 233017200Swollman# - The rest of the country (the Mexico/General TZ) 233158787Sru# 233217200Swollman# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 233317200Swollman# at 2:00 AM, the times in each zone are as follows: 233417200Swollman# BajaNorte: GMT+7 233517200Swollman# BajaSur: GMT+6 233617200Swollman# General: GMT+5 233758787Sru# 233817200Swollman# 3. The rest of the year, the times are as follows: 233917200Swollman# BajaNorte: GMT+8 234017200Swollman# BajaSur: GMT+7 234117200Swollman# General: GMT+6 234258787Sru# 234317200Swollman# The Decree was published in Mexico's Official Newspaper on January 4th. 234458787Sru# 234517200Swollman# -------------- End Forwarded Message -------------- 234617200Swollman# From Paul Eggert (1996-06-12): 234743014Swollman# For an English translation of the decree, see 2348309568Sglebius# "Diario Oficial: Time Zone Changeover" (1996-01-04). 2349309568Sglebius# http://mexico-travel.com/extra/timezone_eng.html 235014343Swollman 235143543Swollman# From Rives McDow (1998-10-08): 235243543Swollman# The State of Quintana Roo has reverted back to central STD and DST times 235343543Swollman# (i.e. UTC -0600 and -0500 as of 1998-08-02). 235443543Swollman 235558787Sru# From Rives McDow (2000-01-10): 235658787Sru# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 235758787Sru# zone 5 hours from the International Date Line, and will not observe daylight 235858787Sru# savings time so as to stay on the same time zone as the southern part of 235958787Sru# Arizona year round. 236058787Sru 2361273438Sdelphij# From Jesper N��rgaard, translating 236275267Swollman# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 236375267Swollman# In Oaxaca, the 55.000 teachers from the Section 22 of the National 236475267Swollman# Syndicate of Education Workers, refuse to apply daylight saving each 236575267Swollman# year, so that the more than 10,000 schools work at normal hour the 236675267Swollman# whole year. 236775267Swollman 236875267Swollman# From Gwillim Law (2001-01-19): 236975267Swollman# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 237075267Swollman# (translated):... 237175267Swollman# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 237275267Swollman# that Summer Time will be reduced from seven to five months, starting 237375267Swollman# this year.... 2374309568Sglebius# http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 237575267Swollman# [translated], says "summer time will ... take effect on the first Sunday 237675267Swollman# in May, and end on the last Sunday of September. 237775267Swollman 237875267Swollman# From Arthur David Olson (2001-01-25): 237975267Swollman# The 2001-01-24 traditional Washington Post contained the page one 238075267Swollman# story "Timely Issue Divides Mexicans."... 238175267Swollman# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2382273438Sdelphij# ... Mexico City Mayor L��pez Obrador "...is threatening to keep 238375267Swollman# Mexico City and its 20 million residents on a different time than 2384273438Sdelphij# the rest of the country..." In particular, L��pez Obrador would abolish 238575267Swollman# observation of Daylight Saving Time. 238675267Swollman 238775267Swollman# Official statute published by the Energy Department 2388309568Sglebius# http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre 2389273438Sdelphij# (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2390273438Sdelphij# and Sonora with no DST. This was reported by Jesper N��rgaard (2001-02-03). 239175267Swollman 239275267Swollman# From Paul Eggert (2001-03-03): 239375267Swollman# 2394309568Sglebius# http://www.latimes.com/news/nation/20010303/t000018766.html 239575267Swollman# James F. Smith writes in today's LA Times 239675267Swollman# * Sonora will continue to observe standard time. 2397273438Sdelphij# * Last week Mexico City's mayor Andr��s Manuel L��pez Obrador decreed that 239875267Swollman# the Federal District will not adopt DST. 239975267Swollman# * 4 of 16 district leaders announced they'll ignore the decree. 240075267Swollman# * The decree does not affect federal-controlled facilities including 240175267Swollman# the airport, banks, hospitals, and schools. 240275267Swollman# 240375267Swollman# For now we'll assume that the Federal District will bow to federal rules. 240475267Swollman 2405273438Sdelphij# From Jesper N��rgaard (2001-04-01): 240675267Swollman# I found some references to the Mexican application of daylight 240775267Swollman# saving, which modifies what I had already sent you, stating earlier 240875267Swollman# that a number of northern Mexican states would go on daylight 240975267Swollman# saving. The modification reverts this to only cover Baja California 241075267Swollman# (Norte), while all other states (except Sonora, who has no daylight 241175267Swollman# saving all year) will follow the original decree of president 241275267Swollman# Vicente Fox, starting daylight saving May 6, 2001 and ending 241375267Swollman# September 30, 2001. 2414273438Sdelphij# References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp> 241575267Swollman# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 241675267Swollman 241786222Swollman# From Reuters (2001-09-04): 241886222Swollman# Mexico's Supreme Court on Tuesday declared that daylight savings was 241986222Swollman# unconstitutional in Mexico City, creating the possibility the 242086222Swollman# capital will be in a different time zone from the rest of the nation 242186222Swollman# next year.... The Supreme Court's ruling takes effect at 2:00 242286222Swollman# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 242386222Swollman# standard time. "This is so residents of the Federal District are not 242486222Swollman# subject to unexpected time changes," a statement from the court said. 242586222Swollman 2426273438Sdelphij# From Jesper N��rgaard Welen (2002-03-12): 242793799Swollman# ... consulting my local grocery store(!) and my coworkers, they all insisted 242893799Swollman# that a new decision had been made to reinstate US style DST in Mexico.... 242993799Swollman# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 243093799Swollman# confirms this. Sonora as usual is the only state where DST is not applied. 243193799Swollman 2432203019Sedwin# From Steffen Thorsen (2009-12-28): 2433203019Sedwin# 2434203019Sedwin# Steffen Thorsen wrote: 2435203019Sedwin# > Mexico's House of Representatives has approved a proposal for northern 2436203019Sedwin# > Mexico's border cities to share the same daylight saving schedule as 2437203019Sedwin# > the United States. 2438203019Sedwin# Now this has passed both the Congress and the Senate, so starting from 2439203019Sedwin# 2010, some border regions will be the same: 2440203019Sedwin# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2441203019Sedwin# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2442203019Sedwin# (Spanish) 2443203019Sedwin# 2444203019Sedwin# Could not find the new law text, but the proposed law text changes are here: 2445203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2446203019Sedwin# (Gaceta Parlamentaria) 2447203019Sedwin# 2448203019Sedwin# There is also a list of the votes here: 2449203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2450203019Sedwin# 2451203019Sedwin# Our page: 2452203019Sedwin# http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2453203019Sedwin 2454203019Sedwin# From Arthur David Olson (2010-01-20): 2455203019Sedwin# The page 2456203019Sedwin# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2457203019Sedwin# includes this text: 2458203019Sedwin# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2459273438Sdelphij# Ju��rez y Ojinaga en Chihuahua; Acu��a y Piedras Negras en Coahuila; 2460273438Sdelphij# An��huac en Nuevo Le��n; y Nuevo Laredo, Reynosa y Matamoros en 2461273438Sdelphij# Tamaulipas, la aplicaci��n de este horario estacional surtir�� efecto 2462273438Sdelphij# desde las dos horas del segundo domingo de marzo y concluir�� a las dos 2463203019Sedwin# horas del primer domingo de noviembre. 2464203019Sedwin# En los municipios fronterizos que se encuentren ubicados en la franja 2465273438Sdelphij# fronteriza norte en el territorio comprendido entre la l��nea 2466273438Sdelphij# internacional y la l��nea paralela ubicada a una distancia de veinte 2467273438Sdelphij# kil��metros, as�� como la Ciudad de Ensenada, Baja California, hacia el 2468273438Sdelphij# interior del pa��s, la aplicaci��n de este horario estacional surtir�� 2469273438Sdelphij# efecto desde las dos horas del segundo domingo de marzo y concluir�� a 2470203019Sedwin# las dos horas del primer domingo de noviembre. 2471203019Sedwin 2472309568Sglebius# From Steffen Thorsen (2014-12-08), translated by Gwillim Law: 2473309568Sglebius# The Mexican state of Quintana Roo will likely change to EST in 2015. 2474309568Sglebius# 2475309568Sglebius# http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo 2476309568Sglebius# "With this change, the time conflict that has existed between the municipios 2477309568Sglebius# of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an 2478309568Sglebius# end. The latter declared itself in rebellion 15 years ago when a time change 2479309568Sglebius# was initiated in Mexico, and since then it has refused to change its time 2480309568Sglebius# zone along with the rest of the country." 2481309568Sglebius# 2482309568Sglebius# From Steffen Thorsen (2015-01-14), translated by Gwillim Law: 2483309568Sglebius# http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html 2484309568Sglebius# "...the new time zone will come into effect at two o'clock on the first Sunday 2485309568Sglebius# of February, when we will have to advance the clock one hour from its current 2486309568Sglebius# time..." 2487309568Sglebius# Also, the new zone will not use DST. 2488309568Sglebius# 2489309568Sglebius# From Carlos Ra��l Perasso (2015-02-02): 2490309568Sglebius# The decree that modifies the Mexican Hour System Law has finally 2491309568Sglebius# been published at the Diario Oficial de la Federaci��n 2492309568Sglebius# http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015 2493309568Sglebius# It establishes 5 zones for Mexico: 2494309568Sglebius# 1- Zona Centro (Central Zone): Corresponds to longitude 90 W, 2495309568Sglebius# includes most of Mexico, excluding what's mentioned below. 2496309568Sglebius# 2- Zona Pac��fico (Pacific Zone): Longitude 105 W, includes the 2497309568Sglebius# states of Baja California Sur; Chihuahua; Nayarit (excluding Bah��a 2498309568Sglebius# de Banderas which lies in Central Zone); Sinaloa and Sonora. 2499309568Sglebius# 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the 2500309568Sglebius# state of Baja California. 2501309568Sglebius# 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state 2502309568Sglebius# of Quintana Roo. 2503309568Sglebius# 5- The islands, reefs and keys shall take their timezone from the 2504309568Sglebius# longitude they are located at. 2505309568Sglebius 25062742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 25072742SwollmanRule Mexico 1939 only - Feb 5 0:00 1:00 D 25082742SwollmanRule Mexico 1939 only - Jun 25 0:00 0 S 25092742SwollmanRule Mexico 1940 only - Dec 9 0:00 1:00 D 25102742SwollmanRule Mexico 1941 only - Apr 1 0:00 0 S 2511121098SwollmanRule Mexico 1943 only - Dec 16 0:00 1:00 W # War 25122742SwollmanRule Mexico 1944 only - May 1 0:00 0 S 25132742SwollmanRule Mexico 1950 only - Feb 12 0:00 1:00 D 25142742SwollmanRule Mexico 1950 only - Jul 30 0:00 0 S 251575267SwollmanRule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 251675267SwollmanRule Mexico 1996 2000 - Oct lastSun 2:00 0 S 251793799SwollmanRule Mexico 2001 only - May Sun>=1 2:00 1:00 D 251893799SwollmanRule Mexico 2001 only - Sep lastSun 2:00 0 S 251993799SwollmanRule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 252093799SwollmanRule Mexico 2002 max - Oct lastSun 2:00 0 S 25212742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2522273438Sdelphij# Quintana Roo; represented by Canc��n 252358787SruZone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 252475267Swollman -6:00 - CST 1981 Dec 23 252543543Swollman -5:00 Mexico E%sT 1998 Aug 2 2:00 2526309568Sglebius -6:00 Mexico C%sT 2015 Feb 1 2:00 2527309568Sglebius -5:00 - EST 2528273438Sdelphij# Campeche, Yucat��n; represented by M��rida 252964499SwollmanZone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 253075267Swollman -6:00 - CST 1981 Dec 23 253164499Swollman -5:00 - EST 1982 Dec 2 253264499Swollman -6:00 Mexico C%sT 2533309568Sglebius# Coahuila, Nuevo Le��n, Tamaulipas (near US border) 2534309568Sglebius# This includes the following municipalities: 2535309568Sglebius# in Coahuila: Ocampo, Acu��a, Zaragoza, Jim��nez, Piedras Negras, Nava, 2536309568Sglebius# Guerrero, Hidalgo. 2537309568Sglebius# in Nuevo Le��n: An��huac, Los Aldama. 2538309568Sglebius# in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alem��n, Camargo, 2539309568Sglebius# Gustavo D��az Ordaz, Reynosa, R��o Bravo, Valle Hermoso, Matamoros. 2540309568Sglebius# See: Inicia ma��ana Horario de Verano en zona fronteriza, El Universal, 2541309568Sglebius# 2016-03-12 2542309568Sglebius# http://www.eluniversal.com.mx/articulo/estados/2016/03/12/inicia-manana-horario-de-verano-en-zona-fronteriza 2543203019SedwinZone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2544203019Sedwin -6:00 - CST 1988 2545203019Sedwin -6:00 US C%sT 1989 2546203019Sedwin -6:00 Mexico C%sT 2010 2547203019Sedwin -6:00 US C%sT 2548309568Sglebius# Durango; Coahuila, Nuevo Le��n, Tamaulipas (away from US border) 254975267SwollmanZone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 255064499Swollman -6:00 - CST 1988 255164499Swollman -6:00 US C%sT 1989 255264499Swollman -6:00 Mexico C%sT 255343014Swollman# Central Mexico 2554309568SglebiusZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 25552742Swollman -7:00 - MST 1927 Jun 10 23:00 25562742Swollman -6:00 - CST 1930 Nov 15 25572742Swollman -7:00 - MST 1931 May 1 23:00 25582742Swollman -6:00 - CST 1931 Oct 255975267Swollman -7:00 - MST 1932 Apr 1 2560309568Sglebius -6:00 Mexico C%sT 2001 Sep 30 2:00 256193799Swollman -6:00 - CST 2002 Feb 20 256293799Swollman -6:00 Mexico C%sT 2563203019Sedwin# Chihuahua (near US border) 2564309568Sglebius# This includes the municipalities of Janos, Ascensi��n, Ju��rez, Guadalupe, 2565309568Sglebius# Pr��xedis G Guerrero, Coyame del Sotol, Ojinaga, and Manuel Benavides. 2566309568Sglebius# (See the 2016-03-12 El Universal source mentioned above.) 2567309568SglebiusZone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2568203019Sedwin -7:00 - MST 1927 Jun 10 23:00 2569203019Sedwin -6:00 - CST 1930 Nov 15 2570203019Sedwin -7:00 - MST 1931 May 1 23:00 2571203019Sedwin -6:00 - CST 1931 Oct 2572203019Sedwin -7:00 - MST 1932 Apr 1 2573203019Sedwin -6:00 - CST 1996 2574203019Sedwin -6:00 Mexico C%sT 1998 2575309568Sglebius -6:00 - CST 1998 Apr Sun>=1 3:00 2576203019Sedwin -7:00 Mexico M%sT 2010 2577203019Sedwin -7:00 US M%sT 2578203019Sedwin# Chihuahua (away from US border) 257958787SruZone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 258043014Swollman -7:00 - MST 1927 Jun 10 23:00 258143014Swollman -6:00 - CST 1930 Nov 15 258243014Swollman -7:00 - MST 1931 May 1 23:00 258343014Swollman -6:00 - CST 1931 Oct 258475267Swollman -7:00 - MST 1932 Apr 1 258543014Swollman -6:00 - CST 1996 258643014Swollman -6:00 Mexico C%sT 1998 2587309568Sglebius -6:00 - CST 1998 Apr Sun>=1 3:00 258843014Swollman -7:00 Mexico M%sT 258958787Sru# Sonora 259058787SruZone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 259158787Sru -7:00 - MST 1927 Jun 10 23:00 259258787Sru -6:00 - CST 1930 Nov 15 259358787Sru -7:00 - MST 1931 May 1 23:00 259458787Sru -6:00 - CST 1931 Oct 259575267Swollman -7:00 - MST 1932 Apr 1 259664499Swollman -6:00 - CST 1942 Apr 24 259758787Sru -7:00 - MST 1949 Jan 14 259858787Sru -8:00 - PST 1970 259958787Sru -7:00 Mexico M%sT 1999 260058787Sru -7:00 - MST 2601207898Sedwin 2602207898Sedwin# From Alexander Krivenyshev (2010-04-21): 2603273438Sdelphij# According to news, Bah��a de Banderas (Mexican state of Nayarit) 2604207898Sedwin# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2605207898Sedwin# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2606207898Sedwin# 2607207898Sedwin# (Spanish) 2608273438Sdelphij# Bah��a de Banderas homologa su horario al del centro del 2609273438Sdelphij# pa��s, a partir de este domingo 2610207898Sedwin# http://www.nayarit.gob.mx/notes.asp?id=20748 2611207898Sedwin# 2612273438Sdelphij# Bah��a de Banderas homologa su horario con el del Centro del 2613273438Sdelphij# Pa��s 2614273438Sdelphij# 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 2615207898Sedwin# 2616207898Sedwin# (English) 2617273438Sdelphij# Puerto Vallarta and Bah��a de Banderas: One Time Zone 2618207898Sedwin# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2619207898Sedwin# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2620207898Sedwin# 2621207898Sedwin# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2622273438Sdelphij# will allow Bah��a de Banderas and Puerto Vallarta to share the same time 2623207898Sedwin# zone ..." 262464499Swollman# Baja California Sur, Nayarit, Sinaloa 2625207898Sedwin 2626207898Sedwin# From Arthur David Olson (2010-05-01): 2627207898Sedwin# Use "Bahia_Banderas" to keep the name to fourteen characters. 2628207898Sedwin 2629273438Sdelphij# Mazatl��n 26302742SwollmanZone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 26312742Swollman -7:00 - MST 1927 Jun 10 23:00 26322742Swollman -6:00 - CST 1930 Nov 15 26332742Swollman -7:00 - MST 1931 May 1 23:00 26342742Swollman -6:00 - CST 1931 Oct 263575267Swollman -7:00 - MST 1932 Apr 1 263664499Swollman -6:00 - CST 1942 Apr 24 26372742Swollman -7:00 - MST 1949 Jan 14 26382742Swollman -8:00 - PST 1970 263914343Swollman -7:00 Mexico M%sT 2640207898Sedwin 2641273438Sdelphij# Bah��a de Banderas 2642207898SedwinZone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2643207898Sedwin -7:00 - MST 1927 Jun 10 23:00 2644207898Sedwin -6:00 - CST 1930 Nov 15 2645207898Sedwin -7:00 - MST 1931 May 1 23:00 2646207898Sedwin -6:00 - CST 1931 Oct 2647207898Sedwin -7:00 - MST 1932 Apr 1 2648207898Sedwin -6:00 - CST 1942 Apr 24 2649207898Sedwin -7:00 - MST 1949 Jan 14 2650207898Sedwin -8:00 - PST 1970 2651309568Sglebius -7:00 Mexico M%sT 2010 Apr 4 2:00 2652207898Sedwin -6:00 Mexico C%sT 2653207898Sedwin 2654309568Sglebius# Baja California 26552742SwollmanZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 265675267Swollman -7:00 - MST 1924 26572742Swollman -8:00 - PST 1927 Jun 10 23:00 265875267Swollman -7:00 - MST 1930 Nov 15 265975267Swollman -8:00 - PST 1931 Apr 1 266075267Swollman -8:00 1:00 PDT 1931 Sep 30 266164499Swollman -8:00 - PST 1942 Apr 24 2662158421Swollman -8:00 1:00 PWT 1945 Aug 14 23:00u 2663158421Swollman -8:00 1:00 PPT 1945 Nov 12 # Peace 266475267Swollman -8:00 - PST 1948 Apr 5 266575267Swollman -8:00 1:00 PDT 1949 Jan 14 266675267Swollman -8:00 - PST 1954 266775267Swollman -8:00 CA P%sT 1961 266875267Swollman -8:00 - PST 1976 266914343Swollman -8:00 US P%sT 1996 267075267Swollman -8:00 Mexico P%sT 2001 267193799Swollman -8:00 US P%sT 2002 Feb 20 2672203019Sedwin -8:00 Mexico P%sT 2010 2673203019Sedwin -8:00 US P%sT 2674158421Swollman# From Paul Eggert (2006-03-22): 267575267Swollman# Formerly there was an America/Ensenada zone, which differed from 267675267Swollman# America/Tijuana only in that it did not observe DST from 1976 2677158421Swollman# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2678158421Swollman# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2679273438Sdelphij# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 2680158421Swollman# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 268175267Swollman# DST-observance was a town-by-town matter back then. This concerns 268275267Swollman# data after 1970 so most likely there should be at least one Zone 268375267Swollman# other than America/Tijuana for Baja, but it's not clear yet what its 268475267Swollman# name or contents should be. 26852742Swollman# 2686309568Sglebius# From Paul Eggert (2015-10-08): 2687309568Sglebius# Formerly there was an America/Santa_Isabel zone, but this appears to 2688309568Sglebius# have come from a misreading of 2689309568Sglebius# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2690309568Sglebius# It has been moved to the 'backward' file. 2691309568Sglebius# 2692309568Sglebius# 26932742Swollman# Revillagigedo Is 26942742Swollman# no information 26952742Swollman 26962742Swollman############################################################################### 26972742Swollman 26982742Swollman# Anguilla 2699309568Sglebius# Antigua and Barbuda 2700273438Sdelphij# See America/Port_of_Spain. 27012742Swollman 27022742Swollman# Bahamas 2703169811Swollman# 2704248310Sedwin# For 1899 Milne gives -5:09:29.5; round that. 2705248310Sedwin# 2706169811Swollman# From Sue Williams (2006-12-07): 2707169811Swollman# The Bahamas announced about a month ago that they plan to change their DST 2708169811Swollman# rules to sync with the U.S. starting in 2007.... 2709169811Swollman# http://www.jonesbahamas.com/?c=45&a=10412 2710169811Swollman 27112742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2712181421SedwinRule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2713181421SedwinRule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 27142742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2715248310SedwinZone America/Nassau -5:09:30 - LMT 1912 Mar 2 2716169811Swollman -5:00 Bahamas E%sT 1976 2717169811Swollman -5:00 US E%sT 27182742Swollman 27192742Swollman# Barbados 2720248310Sedwin 2721248310Sedwin# For 1899 Milne gives -3:58:29.2; round that. 2722248310Sedwin 27232742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 27242742SwollmanRule Barb 1977 only - Jun 12 2:00 1:00 D 27252742SwollmanRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 27262742SwollmanRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 27272742SwollmanRule Barb 1979 only - Sep 30 2:00 0 S 27282742SwollmanRule Barb 1980 only - Sep 25 2:00 0 S 27292742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2730309568SglebiusZone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2731309568Sglebius -3:58:29 - BMT 1932 # Bridgetown Mean Time 27322742Swollman -4:00 Barb A%sT 27332742Swollman 27342742Swollman# Belize 2735158421Swollman# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 27362742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 27372742SwollmanRule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 27382742SwollmanRule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 27392742SwollmanRule Belize 1973 only - Dec 5 0:00 1:00 D 27402742SwollmanRule Belize 1974 only - Feb 9 0:00 0 S 27412742SwollmanRule Belize 1982 only - Dec 18 0:00 1:00 D 27422742SwollmanRule Belize 1983 only - Feb 12 0:00 0 S 27432742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 27442742SwollmanZone America/Belize -5:52:48 - LMT 1912 Apr 27452742Swollman -6:00 Belize C%sT 27462742Swollman 27472742Swollman# Bermuda 2748163302Sru 2749248310Sedwin# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2750248310Sedwin# Bermuda dockyard, Ireland I; round that. 2751248310Sedwin 2752163302Sru# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2753163302Sru 2754163302Sru# Next year, however, clocks in the US will go forward on the second Sunday 2755163302Sru# in March, until the first Sunday in November. And, after the Time Zone 2756163302Sru# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2757163302Sru# Friday, the same thing will happen in Bermuda. 2758163302Sru# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2759163302Sru 27602742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2761309568SglebiusZone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 2762309568Sglebius -4:00 - AST 1974 Apr 28 2:00 2763257682Sedwin -4:00 Canada A%sT 1976 2764163302Sru -4:00 US A%sT 27652742Swollman 27662742Swollman# Cayman Is 2767309568Sglebius# See America/Panama. 27682742Swollman 27692742Swollman# Costa Rica 2770248310Sedwin 2771273438Sdelphij# Milne gives -5:36:13.3 as San Jos�� mean time; round to nearest. 2772248310Sedwin 27732742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 27742742SwollmanRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 27752742SwollmanRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 277620094SwollmanRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2777158421Swollman# IATA SSIM (1991-09) says the following was at 1:00; 2778158421Swollman# go with Shanks & Pottenger. 277920094SwollmanRule CR 1991 only - Jul 1 0:00 0 S 278020094SwollmanRule CR 1992 only - Mar 15 0:00 0 S 2781273438Sdelphij# There are too many San Jos��s elsewhere, so we'll use 'Costa Rica'. 27822742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2783309568SglebiusZone America/Costa_Rica -5:36:13 - LMT 1890 # San Jos�� 2784273438Sdelphij -5:36:13 - SJMT 1921 Jan 15 # San Jos�� Mean Time 27852742Swollman -6:00 CR C%sT 27862742Swollman# Coco 27872742Swollman# no information; probably like America/Costa_Rica 27882742Swollman 27892742Swollman# Cuba 27902742Swollman 2791248310Sedwin# From Paul Eggert (2013-02-21): 2792248310Sedwin# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2793248310Sedwin# for the port, and -5:30 for meteorological observations. 2794248310Sedwin# For now, stick with Shanks & Pottenger. 2795248310Sedwin 279658787Sru# From Arthur David Olson (1999-03-29): 279758787Sru# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 279858787Sru# the Cuban National Team and the Baltimore Orioles was carried live on 279958787Sru# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 280058787Sru# During the game, play-by-play announcer Jim Hunter noted that 280158787Sru# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 280258787Sru# Time today." (The "two hour" remark referred to losing one hour of 2803273438Sdelphij# sleep on 1999-03-28 - when the announcers were in Cuba as it switched 2804273438Sdelphij# to DST - and one more hour on 1999-04-04 - when the announcers will have 280558787Sru# returned to Baltimore, which switches on that date.) 28062742Swollman 2807259630Sedwin# From Steffen Thorsen (2013-11-11): 2808259630Sedwin# DST start in Cuba in 2004 ... does not follow the same rules as the 2809259630Sedwin# years before. The correct date should be Sunday 2004-03-28 00:00 ... 2810259630Sedwin# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 2811259630Sedwin 2812138323Swollman# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2813138323Swollman# Cuba is not going back to standard time this year. 2814158421Swollman# From Paul Eggert (2006-03-22): 2815138323Swollman# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2816138323Swollman# says that it's due to a problem at the Antonio Guiteras 2817138323Swollman# thermoelectric plant, and says "This October there will be no return 2818138323Swollman# to normal hours (after daylight saving time)". 2819158421Swollman# For now, let's assume that it's a temporary measure. 2820138323Swollman 2821153670Swollman# From Carlos A. Carnero Delgado (2005-11-12): 2822153670Swollman# This year (just like in 2004-2005) there's no change in time zone 2823153670Swollman# adjustment in Cuba. We will stay in daylight saving time: 2824153670Swollman# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2825153670Swollman 2826273438Sdelphij# From Jesper N��rgaard Welen (2006-10-21): 2827169811Swollman# An article in GRANMA INTERNACIONAL claims that Cuba will end 2828169811Swollman# the 3 years of permanent DST next weekend, see 2829169811Swollman# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2830169811Swollman# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2831273438Sdelphij# watches should be set back one hour - going back to 00:00 hours - returning 2832169811Swollman# to the normal schedule.... 2833163302Sru 2834169811Swollman# From Paul Eggert (2007-03-02): 2835273438Sdelphij# <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday, 2836169811Swollman# says Cuban clocks will advance at midnight on March 10. 2837169811Swollman# For lack of better information, assume Cuba will use US rules, 2838169811Swollman# except that it switches at midnight standard time as usual. 2839173319Sedwin# 2840173319Sedwin# From Steffen Thorsen (2007-10-25): 2841240461Sedwin# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2842173319Sedwin# earlier - on the last Sunday of October, just like in 2006. 2843240461Sedwin# 2844173319Sedwin# He supplied these references: 2845240461Sedwin# 2846173319Sedwin# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2847173319Sedwin# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2848240461Sedwin# 2849273438Sdelphij# From Alex Krivenyshev (2007-10-25): 2850173319Sedwin# Here is also article from Granma (Cuba): 2851240461Sedwin# 2852273438Sdelphij# Regir�� el Horario Normal desde el pr��ximo domingo 28 de octubre 2853173319Sedwin# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2854240461Sedwin# 2855173319Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2856169811Swollman 2857177591Sedwin# From Arthur David Olson (2008-03-09): 2858177591Sedwin# I'm in Maryland which is now observing United States Eastern Daylight 2859177591Sedwin# Time. At 9:44 local time I used RealPlayer to listen to 2860177591Sedwin# http://media.enet.cu/radioreloj 2861273438Sdelphij# a Cuban information station, and heard 2862177591Sedwin# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2863177591Sedwin# indicating that Cuba is still on standard time. 2864177591Sedwin 2865177591Sedwin# From Steffen Thorsen (2008-03-12): 2866177591Sedwin# It seems that Cuba will start DST on Sunday, 2007-03-16... 2867177591Sedwin# It was announced yesterday, according to this source (in Spanish): 2868177591Sedwin# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2869177591Sedwin# 2870177591Sedwin# Some more background information is posted here: 2871177591Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2872177591Sedwin# 2873177591Sedwin# The article also says that Cuba has been observing DST since 1963, 2874177591Sedwin# while Shanks (and tzdata) has 1965 as the first date (except in the 2875177591Sedwin# 1940's). Many other web pages in Cuba also claim that it has been 2876177591Sedwin# observed since 1963, but with the exception of 1970 - an exception 2877177591Sedwin# which is not present in tzdata/Shanks. So there is a chance we need to 2878177591Sedwin# change some historic records as well. 2879177591Sedwin# 2880177591Sedwin# One example: 2881177591Sedwin# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2882177591Sedwin 2883273438Sdelphij# From Jesper N��rgaard Welen (2008-03-13): 2884177591Sedwin# The Cuban time change has just been confirmed on the most authoritative 2885177591Sedwin# web site, the Granma. Please check out 2886177591Sedwin# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2887177591Sedwin# 2888273438Sdelphij# Basically as expected after Steffen Thorsen's information, the change 2889177591Sedwin# will take place midnight between Saturday and Sunday. 2890177591Sedwin 2891177591Sedwin# From Arthur David Olson (2008-03-12): 2892177591Sedwin# Assume Sun>=15 (third Sunday) going forward. 2893177591Sedwin 2894189923Sedwin# From Alexander Krivenyshev (2009-03-04) 2895189923Sedwin# According to the Radio Reloj - Cuba will start Daylight Saving Time on 2896189923Sedwin# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2897189923Sedwin# not on midnight March 14 / March 15 as previously thought. 2898189923Sedwin# 2899189923Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2900189923Sedwin# (in Spanish) 2901189923Sedwin 2902189923Sedwin# From Arthur David Olson (2009-03-09) 2903189923Sedwin# I listened over the Internet to 2904189923Sedwin# http://media.enet.cu/readioreloj 2905189923Sedwin# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2906273438Sdelphij# the time was announced as "diez cinco" - the same time as here, indicating 2907189923Sedwin# that has indeed switched to DST. Assume second Sunday from 2009 forward. 2908189923Sedwin 2909219687Sedwin# From Steffen Thorsen (2011-03-08): 2910219687Sedwin# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2911219687Sedwin# this year. Nothing about the end date known so far (if that has 2912219687Sedwin# changed at all). 2913219687Sedwin# 2914219687Sedwin# Source: 2915219687Sedwin# http://granma.co.cu/2011/03/08/nacional/artic01.html 2916219687Sedwin# 2917219687Sedwin# Our info: 2918219687Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2919233446Sedwin# 2920233446Sedwin# From Steffen Thorsen (2011-10-30) 2921240461Sedwin# Cuba will end DST two weeks later this year. Instead of going back 2922233446Sedwin# tonight, it has been delayed to 2011-11-13 at 01:00. 2923233446Sedwin# 2924233446Sedwin# One source (Spanish) 2925233446Sedwin# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2926233446Sedwin# 2927233446Sedwin# Our page: 2928233446Sedwin# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2929240461Sedwin# 2930240461Sedwin# From Steffen Thorsen (2012-03-01) 2931240461Sedwin# According to Radio Reloj, Cuba will start DST on Midnight between March 2932240461Sedwin# 31 and April 1. 2933240461Sedwin# 2934240461Sedwin# Radio Reloj has the following info (Spanish): 2935240461Sedwin# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2936240461Sedwin# 2937240461Sedwin# Our info on it: 2938240461Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2939219687Sedwin 2940242932Sedwin# From Steffen Thorsen (2012-11-03): 2941242932Sedwin# Radio Reloj and many other sources report that Cuba is changing back 2942242932Sedwin# to standard time on 2012-11-04: 2943242932Sedwin# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2944242932Sedwin# From Paul Eggert (2012-11-03): 2945242932Sedwin# For now, assume the future rule is first Sunday in November. 2946242932Sedwin 29472742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 29482742SwollmanRule Cuba 1928 only - Jun 10 0:00 1:00 D 29492742SwollmanRule Cuba 1928 only - Oct 10 0:00 0 S 29502742SwollmanRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 29512742SwollmanRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 29522742SwollmanRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 29532742SwollmanRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 29542742SwollmanRule Cuba 1965 only - Jun 1 0:00 1:00 D 29552742SwollmanRule Cuba 1965 only - Sep 30 0:00 0 S 29562742SwollmanRule Cuba 1966 only - May 29 0:00 1:00 D 29572742SwollmanRule Cuba 1966 only - Oct 2 0:00 0 S 29582742SwollmanRule Cuba 1967 only - Apr 8 0:00 1:00 D 29592742SwollmanRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 29602742SwollmanRule Cuba 1968 only - Apr 14 0:00 1:00 D 29612742SwollmanRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 29622742SwollmanRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 29632742SwollmanRule Cuba 1972 1974 - Oct 8 0:00 0 S 29642742SwollmanRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 29652742SwollmanRule Cuba 1978 only - May 7 0:00 1:00 D 296630711SwollmanRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 29672742SwollmanRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 29682742SwollmanRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 29692742SwollmanRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 297043014SwollmanRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 297120094SwollmanRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 297243014SwollmanRule Cuba 1996 only - Oct 6 0:00s 0 S 297343014SwollmanRule Cuba 1997 only - Oct 12 0:00s 0 S 297458787SruRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2975138323SwollmanRule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2976259630SedwinRule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 2977259630SedwinRule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 2978233446SedwinRule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 2979177591SedwinRule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2980189923SedwinRule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2981219687SedwinRule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 2982219687SedwinRule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 2983233446SedwinRule Cuba 2011 only - Nov 13 0:00s 0 S 2984240461SedwinRule Cuba 2012 only - Apr 1 0:00s 1:00 D 2985242932SedwinRule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 2986240461SedwinRule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 29872742Swollman 29882742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29892742SwollmanZone America/Havana -5:29:28 - LMT 1890 299058787Sru -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 29912742Swollman -5:00 Cuba C%sT 29922742Swollman 29932742Swollman# Dominica 2994273438Sdelphij# See America/Port_of_Spain. 29952742Swollman 29962742Swollman# Dominican Republic 299775267Swollman 299875267Swollman# From Steffen Thorsen (2000-10-30): 299975267Swollman# Enrique Morales reported to me that the Dominican Republic has changed the 300075267Swollman# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 300175267Swollman# http://www.listin.com.do/antes/261000/republica/princi.html 300275267Swollman 300375267Swollman# From Paul Eggert (2000-12-04): 300475267Swollman# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 300575267Swollman 300675267Swollman# From Rives McDow (2000-12-01): 300775267Swollman# Dominican Republic changed its mind and presidential decree on Tuesday, 300875267Swollman# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 300975267Swollman# Dominican Republic will be reverting to 8 hours from the International Date 301075267Swollman# Line, and will not be using DST in the foreseeable future. The reason they 301175267Swollman# decided to use DST was to be in synch with Puerto Rico, who was also going 301275267Swollman# to implement DST. When Puerto Rico didn't implement DST, the president 301375267Swollman# decided to revert. 301475267Swollman 301575267Swollman 30162742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 30172742SwollmanRule DR 1966 only - Oct 30 0:00 1:00 D 30182742SwollmanRule DR 1967 only - Feb 28 0:00 0 S 30192742SwollmanRule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 30202742SwollmanRule DR 1970 only - Feb 21 0:00 0 S 30212742SwollmanRule DR 1971 only - Jan 20 0:00 0 S 30222742SwollmanRule DR 1972 1974 - Jan 21 0:00 0 S 30232742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 30242742SwollmanZone America/Santo_Domingo -4:39:36 - LMT 1890 30252742Swollman -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 30262742Swollman -5:00 DR E%sT 1974 Oct 27 3027309568Sglebius -4:00 - AST 2000 Oct 29 2:00 3028309568Sglebius -5:00 US E%sT 2000 Dec 3 1:00 30292742Swollman -4:00 - AST 30302742Swollman 30312742Swollman# El Salvador 3032158421Swollman 30332742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 30342742SwollmanRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 30352742SwollmanRule Salv 1987 1988 - Sep lastSun 0:00 0 S 3036121098Swollman# There are too many San Salvadors elsewhere, so use America/El_Salvador 3037121098Swollman# instead of America/San_Salvador. 30382742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3039309568SglebiusZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 30402742Swollman -6:00 Salv C%sT 30412742Swollman 30422742Swollman# Grenada 30432742Swollman# Guadeloupe 3044273438Sdelphij# St Barth��lemy 3045174242Sedwin# St Martin (French part) 3046273438Sdelphij# See America/Port_of_Spain. 30472742Swollman 30482742Swollman# Guatemala 3049158421Swollman# 3050158421Swollman# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 3051158421Swollman# Diario Co Latino, at 3052273438Sdelphij# <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>, 3053158421Swollman# says in an article dated 2006-04-19 that the Guatemalan government had 3054158421Swollman# decided on that date to advance official time by 60 minutes, to lessen the 3055158421Swollman# impact of the elevated cost of oil.... Daylight saving time will last from 3056158421Swollman# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 3057163302Sru# From Paul Eggert (2006-06-22): 3058163302Sru# The Ministry of Energy and Mines, press release CP-15/2006 3059163302Sru# (2006-04-19), says DST ends at 24:00. See 3060309568Sglebius# http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf 3061163302Sru 30622742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 30632742SwollmanRule Guat 1973 only - Nov 25 0:00 1:00 D 30642742SwollmanRule Guat 1974 only - Feb 24 0:00 0 S 30652742SwollmanRule Guat 1983 only - May 21 0:00 1:00 D 30662742SwollmanRule Guat 1983 only - Sep 22 0:00 0 S 306720094SwollmanRule Guat 1991 only - Mar 23 0:00 1:00 D 306820094SwollmanRule Guat 1991 only - Sep 7 0:00 0 S 3069158421SwollmanRule Guat 2006 only - Apr 30 0:00 1:00 D 3070158421SwollmanRule Guat 2006 only - Oct 1 0:00 0 S 30712742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 30722742SwollmanZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 30732742Swollman -6:00 Guat C%sT 30742742Swollman 30752742Swollman# Haiti 3076149514Swollman# From Gwillim Law (2005-04-15): 3077273438Sdelphij# Risto O. Nyk��nen wrote me that Haiti is now on DST. 3078273438Sdelphij# I searched for confirmation, and I found a press release 3079149514Swollman# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 3080273438Sdelphij# <http://www.haitianconsulate.org/time.doc>. Translated from French, it says: 3081149514Swollman# 3082149514Swollman# "The Prime Minister's Communication Office notifies the public in general 3083149514Swollman# and the press in particular that, following a decision of the Interior 3084149514Swollman# Ministry and the Territorial Collectivities [I suppose that means the 3085149514Swollman# provinces], Haiti will move to Eastern Daylight Time in the night from next 3086149514Swollman# Saturday the 2nd to Sunday the 3rd. 3087149514Swollman# 3088149514Swollman# "Consequently, the Prime Minister's Communication Office wishes to inform 3089149514Swollman# the population that the country's clocks will be set forward one hour 3090149514Swollman# starting at midnight. This provision will hold until the last Saturday in 3091149514Swollman# October 2005. 3092149514Swollman# 3093149514Swollman# "Port-au-Prince, March 31, 2005" 3094158421Swollman# 3095158421Swollman# From Steffen Thorsen (2006-04-04): 3096158421Swollman# I have been informed by users that Haiti observes DST this year like 3097158421Swollman# last year, so the current "only" rule for 2005 might be changed to a 3098158421Swollman# "max" rule or to last until 2006. (Who knows if they will observe DST 3099158421Swollman# next year or if they will extend their DST like US/Canada next year). 3100158421Swollman# 3101158421Swollman# I have found this article about it (in French): 3102158421Swollman# http://www.haitipressnetwork.com/news.cfm?articleID=7612 3103158421Swollman# 3104158421Swollman# The reason seems to be an energy crisis. 3105149514Swollman 3106169811Swollman# From Stephen Colebourne (2007-02-22): 3107169811Swollman# Some IATA info: Haiti won't be having DST in 2007. 3108158421Swollman 3109240461Sedwin# From Steffen Thorsen (2012-03-11): 3110240461Sedwin# According to several news sources, Haiti will observe DST this year, 3111240461Sedwin# apparently using the same start and end date as USA/Canada. 3112240461Sedwin# So this means they have already changed their time. 3113240461Sedwin# 3114240461Sedwin# http://www.alterpresse.org/spip.php?article12510 3115240461Sedwin# http://radiovision2000haiti.net/home/?p=13253 3116240461Sedwin# 3117240461Sedwin# From Arthur David Olson (2012-03-11): 3118240461Sedwin# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 3119240461Sedwin# 3:00 a.m. rather than the traditional Haitian jump at midnight. 3120248310Sedwin# Assume a US-style fall back as well. 3121240461Sedwin 3122248310Sedwin# From Steffen Thorsen (2013-03-10): 3123248310Sedwin# It appears that Haiti is observing DST this year as well, same rules 3124248310Sedwin# as US/Canada. They did it last year as well, and it looks like they 3125248310Sedwin# are going to observe DST every year now... 3126248310Sedwin# 3127248310Sedwin# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 3128248310Sedwin# http://www.canalplushaiti.net/?p=6714 3129248310Sedwin 3130309568Sglebius# From Steffen Thorsen (2016-03-12): 3131309568Sglebius# Jean Antoine, editor of www.haiti-reference.com informed us that Haiti 3132309568Sglebius# are not going on DST this year. Several other resources confirm this: ... 3133309568Sglebius# http://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html 3134309568Sglebius# http://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ 3135309568Sglebius# http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/ 3136309568Sglebius 31372742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 31382742SwollmanRule Haiti 1983 only - May 8 0:00 1:00 D 31392742SwollmanRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 31402742SwollmanRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 3141158421Swollman# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 3142158421Swollman# Go with IATA. 314343014SwollmanRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 314443014SwollmanRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 3145169811SwollmanRule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 3146169811SwollmanRule Haiti 2005 2006 - Oct lastSun 0:00 0 S 3147309568SglebiusRule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D 3148309568SglebiusRule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S 31492742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 31502742SwollmanZone America/Port-au-Prince -4:49:20 - LMT 1890 31512742Swollman -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 31522742Swollman -5:00 Haiti E%sT 31532742Swollman 31542742Swollman# Honduras 3155158421Swollman# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 3156158421Swollman 3157158421Swollman# From Paul Eggert (2006-05-05): 3158158421Swollman# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 3159158421Swollman# saying Honduras will start using DST midnight Saturday, effective 4 3160158421Swollman# months until September. La Tribuna reported today 3161158421Swollman# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 3162163302Sru# of Honduras, refused to back down on this. 3163158421Swollman 3164273438Sdelphij# From Jesper N��rgaard Welen (2006-08-08): 3165163302Sru# It seems that Honduras has returned from DST to standard time this Monday at 3166163302Sru# 00:00 hours (prolonging Sunday to 25 hours duration). 3167163302Sru# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 3168163302Sru 3169163302Sru# From Paul Eggert (2006-08-08): 3170309568Sglebius# Also see Diario El Heraldo, The country returns to standard time (2006-08-08). 3171309568Sglebius# http://www.elheraldo.hn/nota.php?nid=54941&sec=12 3172163302Sru# It mentions executive decree 18-2006. 3173163302Sru 3174163302Sru# From Steffen Thorsen (2006-08-17): 3175163302Sru# Honduras will observe DST from 2007 to 2009, exact dates are not 3176163302Sru# published, I have located this authoritative source: 3177163302Sru# http://www.presidencia.gob.hn/noticia.aspx?nId=47 3178163302Sru 3179169811Swollman# From Steffen Thorsen (2007-03-30): 3180169811Swollman# http://www.laprensahn.com/pais_nota.php?id04962=7386 3181169811Swollman# So it seems that Honduras will not enter DST this year.... 3182169811Swollman 3183158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3184158421SwollmanRule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 3185158421SwollmanRule Hond 1987 1988 - Sep lastSun 0:00 0 S 3186169811SwollmanRule Hond 2006 only - May Sun>=1 0:00 1:00 D 3187169811SwollmanRule Hond 2006 only - Aug Mon>=1 0:00 0 S 31882742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 31892742SwollmanZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3190158421Swollman -6:00 Hond C%sT 319143543Swollman# 319243543Swollman# Great Swan I ceded by US to Honduras in 1972 31932742Swollman 31942742Swollman# Jamaica 3195257682Sedwin# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3196257682Sedwin# unspecified official document, and says "This time is used throughout the 3197257682Sedwin# island". Go with Milne. Round to the nearest second as required by zic. 3198309568Sglebius# 3199309568Sglebius# Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but 3200309568Sglebius# Lance Neita writes that Prime Minister Michael Manley decreed it January 5. 3201309568Sglebius# Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that 3202309568Sglebius# Manley's supporters associated this act with Manley's nickname "Joshua" 3203309568Sglebius# (recall that in the Bible the sun stood still at Joshua's request), 3204309568Sglebius# and with the Rod of Correction which Manley said he had received from 3205309568Sglebius# Haile Selassie, Emperor of Ethiopia. See: 3206309568Sglebius# Neita L. The politician in all of us. Jamaica Observer 2014-09-20 3207309568Sglebius# http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 3208309568Sglebius# 32092742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3210309568SglebiusZone America/Jamaica -5:07:11 - LMT 1890 # Kingston 3211257682Sedwin -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3212309568Sglebius -5:00 - EST 1974 321320094Swollman -5:00 US E%sT 1984 321420094Swollman -5:00 - EST 32152742Swollman 32162742Swollman# Martinique 32172742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3218309568SglebiusZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 3219309568Sglebius -4:04:20 - FFMT 1911 May # Fort-de-France MT 32202742Swollman -4:00 - AST 1980 Apr 6 32212742Swollman -4:00 1:00 ADT 1980 Sep 28 32222742Swollman -4:00 - AST 32232742Swollman 32242742Swollman# Montserrat 3225273438Sdelphij# See America/Port_of_Spain. 32262742Swollman 32272742Swollman# Nicaragua 322843543Swollman# 3229158421Swollman# This uses Shanks & Pottenger for times before 2005. 323043543Swollman# 3231149514Swollman# From Steffen Thorsen (2005-04-12): 3232149514Swollman# I've got reports from 8 different people that Nicaragua just started 3233149514Swollman# DST on Sunday 2005-04-10, in order to save energy because of 3234149514Swollman# expensive petroleum. The exact end date for DST is not yet 3235149514Swollman# announced, only "September" but some sites also say "mid-September". 3236149514Swollman# Some background information is available on the President's official site: 3237149514Swollman# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3238149514Swollman# The Decree, no 23-2005 is available here: 3239149514Swollman# 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 3240149514Swollman# 3241149514Swollman# From Paul Eggert (2005-05-01): 3242149514Swollman# The decree doesn't say anything about daylight saving, but for now let's 3243158421Swollman# assume that it is daylight saving.... 3244149514Swollman# 3245149514Swollman# From Gwillim Law (2005-04-21): 3246149514Swollman# The Associated Press story on the time change, which can be found at 3247149514Swollman# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3248309568Sglebius# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3249149514Swollman# time that a change of clocks was applied to save energy was in the year 2000 3250273438Sdelphij# during the Arnoldo Alem��n administration."... 3251149514Swollman# The northamerica file says that Nicaragua has been on UTC-6 continuously 3252149514Swollman# since December 1998. I wasn't able to find any details of Nicaraguan time 3253149514Swollman# changes in 2000. Perhaps a note could be added to the northamerica file, to 3254149514Swollman# the effect that we have indirect evidence that DST was observed in 2000. 3255149514Swollman# 3256273438Sdelphij# From Jesper N��rgaard Welen (2005-11-02): 3257153670Swollman# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3258153670Swollman# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3259153670Swollman# (2005-09-26) 3260153670Swollman# 3261273438Sdelphij# From Jesper N��rgaard Welen (2006-05-05): 3262158421Swollman# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3263158421Swollman# (my informal translation) 3264273438Sdelphij# By order of the president of the republic, Enrique Bola��os, Nicaragua 3265158421Swollman# advanced by sixty minutes their official time, yesterday at 2 in the 3266273438Sdelphij# morning, and will stay that way until 30th of September. 3267158421Swollman# 3268273438Sdelphij# From Jesper N��rgaard Welen (2006-09-30): 3269163302Sru# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3270163302Sru# My informal translation runs: 3271163302Sru# The natural sun time is restored in all the national territory, in that the 3272163302Sru# time is returned one hour at 01:00 am of October 1 of 2006. 3273163302Sru# 32742742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 32752742SwollmanRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 32762742SwollmanRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3277149514SwollmanRule Nic 2005 only - Apr 10 0:00 1:00 D 3278163302SruRule Nic 2005 only - Oct Sun>=1 0:00 0 S 3279158421SwollmanRule Nic 2006 only - Apr 30 2:00 1:00 D 3280163302SruRule Nic 2006 only - Oct Sun>=1 1:00 0 S 32812742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 32822742SwollmanZone America/Managua -5:45:08 - LMT 1890 328386222Swollman -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 32842742Swollman -6:00 - CST 1973 May 32852742Swollman -5:00 - EST 1975 Feb 16 3286309568Sglebius -6:00 Nic C%sT 1992 Jan 1 4:00 3287158421Swollman -5:00 - EST 1992 Sep 24 3288158421Swollman -6:00 - CST 1993 3289158421Swollman -5:00 - EST 1997 3290149514Swollman -6:00 Nic C%sT 32912742Swollman 32922742Swollman# Panama 32932742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 32942742SwollmanZone America/Panama -5:18:08 - LMT 1890 3295309568Sglebius -5:19:36 - CMT 1908 Apr 22 # Col��n Mean Time 32962742Swollman -5:00 - EST 3297309568SglebiusLink America/Panama America/Cayman 32982742Swollman 32992742Swollman# Puerto Rico 3300257682Sedwin# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 33012742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3302309568SglebiusZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 33032742Swollman -4:00 - AST 1942 May 3 3304158421Swollman -4:00 US A%sT 1946 33052742Swollman -4:00 - AST 33062742Swollman 33072742Swollman# St Kitts-Nevis 33082742Swollman# St Lucia 3309273438Sdelphij# See America/Port_of_Spain. 33102742Swollman 33112742Swollman# St Pierre and Miquelon 3312257682Sedwin# There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 33132742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3314309568SglebiusZone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 33152742Swollman -4:00 - AST 1980 May 3316121098Swollman -3:00 - PMST 1987 # Pierre & Miquelon Time 3317121098Swollman -3:00 Canada PM%sT 33182742Swollman 33192742Swollman# St Vincent and the Grenadines 3320273438Sdelphij# See America/Port_of_Spain. 33212742Swollman 33222742Swollman# Turks and Caicos 3323169811Swollman# 3324169811Swollman# From Chris Dunn in 3325309568Sglebius# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007 3326169811Swollman# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3327169811Swollman# daylight saving dates for time changes have been adjusted to match 3328169811Swollman# the recent U.S. change of dates. 3329169811Swollman# 3330169811Swollman# From Brian Inglis (2007-04-28): 3331169811Swollman# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3332169811Swollman# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3333169811Swollman# rows before that there is an out of date entry for Oct: 3334169811Swollman# "Eastern Standard Times Begins 2007 3335169811Swollman# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3336169811Swollman# indicating that the normal ET rules are followed. 3337169811Swollman# 3338309568Sglebius# From Paul Eggert (2014-08-19): 3339309568Sglebius# The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See: 3340309568Sglebius# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm 3341309568Sglebius# Model this as a switch from EST/EDT to AST ... 3342309568Sglebius# From Chris Walton (2014-11-04): 3343309568Sglebius# ... the TCI government appears to have delayed the switch to 3344309568Sglebius# "permanent daylight saving time" by one year.... 3345309568Sglebius# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm 3346169811Swollman# 33472742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 33482742SwollmanZone America/Grand_Turk -4:44:32 - LMT 1890 3349309568Sglebius -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3350309568Sglebius -5:00 - EST 1979 3351309568Sglebius -5:00 US E%sT 2015 Nov Sun>=1 2:00 3352309568Sglebius -4:00 - AST 33538029Swollman 335414343Swollman# British Virgin Is 335514343Swollman# Virgin Is 3356273438Sdelphij# See America/Port_of_Spain. 3357273438Sdelphij 3358273438Sdelphij 3359273438Sdelphij# Local Variables: 3360273438Sdelphij# coding: utf-8 3361273438Sdelphij# End: 3362