northamerica revision 279706
1192886Sedwin# This file is in the public domain, so clarified as of 2192886Sedwin# 2009-05-17 by Arthur David Olson. 3153761Swollman 42742Swollman# also includes Central America and the Caribbean 52742Swollman 6273718Sedwin# This file is by no means authoritative; if you think you know better, 72742Swollman# go ahead and edit the file (and please send any changes to 8273718Sedwin# tz@iana.org for general use in the future). For more, please see 9273718Sedwin# the file CONTRIBUTING in the tz distribution. 102742Swollman 11149514Swollman# From Paul Eggert (1999-03-22): 122742Swollman# A reliable and entertaining source about time zones is 1358787Sru# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 142742Swollman 152742Swollman############################################################################### 162742Swollman 172742Swollman# United States 182742Swollman 1958787Sru# From Paul Eggert (1999-03-31): 2058787Sru# Howse writes (pp 121-125) that time zones were invented by 2158787Sru# Professor Charles Ferdinand Dowd (1825-1904), 2258787Sru# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 23257681Sedwin# His pamphlet "A System of National Time for Railroads" (1870) 2458787Sru# was the result of his proposals at the Convention of Railroad Trunk Lines 2558787Sru# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 2658787Sru# but in 1872-05 he moved the proposed origin to Greenwich. 2758787Sru# His proposal was adopted by the railroads on 1883-11-18 at 12:00, 2858787Sru# and the most of the country soon followed suit. 2958787Sru 30149514Swollman# From Paul Eggert (2005-04-16): 31149514Swollman# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 32149514Swollman# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 33149514Swollman 34158421Swollman# From Paul Eggert (2006-03-22): 3514343Swollman# A good source for time zone historical data in the US is 3614343Swollman# Thomas G. Shanks, The American Atlas (5th edition), 3714343Swollman# San Diego: ACS Publications, Inc. (1991). 3814343Swollman# Make sure you have the errata sheet; the book is somewhat useless without it. 39158421Swollman# It is the source for most of the pre-1991 US entries below. 4014343Swollman 4175267Swollman# From Paul Eggert (2001-03-06): 4217200Swollman# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 43257681Sedwin# in his whimsical essay "An Economical Project for Diminishing the Cost 44257681Sedwin# of Light" published in the Journal de Paris (1784-04-26). 4517200Swollman# Not everyone is happy with the results: 4617200Swollman# 4717200Swollman# I don't really care how time is reckoned so long as there is some 4817200Swollman# agreement about it, but I object to being told that I am saving 4917200Swollman# daylight when my reason tells me that I am doing nothing of the kind. 5017200Swollman# I even object to the implication that I am wasting something 5117200Swollman# valuable if I stay in bed after the sun has risen. As an admirer 5217200Swollman# of moonlight I resent the bossy insistence of those who want to 5317200Swollman# reduce my time for enjoying it. At the back of the Daylight Saving 5417200Swollman# scheme I detect the bony, blue-fingered hand of Puritanism, eager 5517200Swollman# to push people into bed earlier, and get them up earlier, to make 5617200Swollman# them healthy, wealthy and wise in spite of themselves. 5717200Swollman# 58270728Spluknet# -- Robertson Davies, The diary of Samuel Marchbanks, 59149514Swollman# Clarke, Irwin (1947), XIX, Sunday 6075267Swollman# 6175267Swollman# For more about the first ten years of DST in the United States, see 62270728Spluknet# Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint 63273718Sedwin# (Carnegie Library of Pittsburgh, 1927). 64273718Sedwin# http://www.clpgh.org/exhibit/dst.html 6575267Swollman# 6675267Swollman# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 6775267Swollman# However, DST was imposed by the Standard Time Act of 1918, which 6875267Swollman# was the first nationwide legal time standard, and apparently 6975267Swollman# time was just called "Standard Time" or "Daylight Saving Time". 7017200Swollman 712742Swollman# From Arthur David Olson: 722742Swollman# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 7319878Swollman# See, for example, the front page of the Saturday, 1974-10-26 7419878Swollman# and Sunday, 1974-10-27 editions of the Washington Post. 752742Swollman 762742Swollman# From Arthur David Olson: 772742Swollman# Before the Uniform Time Act of 1966 took effect in 1967, observance of 782742Swollman# Daylight Saving Time in the US was by local option, except during wartime. 792742Swollman 8067578Swollman# From Arthur David Olson (2000-09-25): 8167578Swollman# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 8267578Swollman# In the introduction, Oboler spoke of "Eastern Peace Time." 83273718Sedwin# An AltaVista search turned up: 84273718Sedwin# http://rowayton.org/rhs/hstaug45.html 8567578Swollman# "When the time is announced over the radio now, it is 'Eastern Peace 8667578Swollman# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 87270728Spluknet# (August 1945) by way of confirmation. 8867578Swollman 89149514Swollman# From Joseph Gallant citing 9067578Swollman# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 9167578Swollman# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 9286222Swollman# to switch to London for Attlee's address, but the American people 9367578Swollman# never got to hear his speech live. According to one press account, 9467578Swollman# CBS' Bob Trout was first to announce the word of Japan's surrender, 9567578Swollman# but a few seconds later, NBC, ABC and Mutual also flashed the word 9667578Swollman# of surrender, all of whom interrupting the bells of Big Ben in 9786222Swollman# London which were to precede Mr. Attlee's speech. 9867578Swollman 99114173Swollman# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 100114173Swollman# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 101114173Swollman# 102114173Swollman# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 103114173Swollman# Any announcement from Asia would reach St. John's New York newsroom on a 104114173Swollman# wire service teletype machine, which had prescribed signals for major news. 105114173Swollman# Associated Press, for example, would ring five bells before spewing out 106114173Swollman# typed copy of an important story, and 10 bells for news "of transcendental 107114173Swollman# importance." 108114173Swollman# 109114173Swollman# On Aug. 14, stalling while talking steadily into the NBC networks' open 110114173Swollman# microphone, St. John heard five bells and waited only to hear a sixth bell, 111114173Swollman# before announcing confidently: "Ladies and gentlemen, World War II is over. 112114173Swollman# The Japanese have agreed to our surrender terms." 113114173Swollman# 114114173Swollman# He had scored a 20-second scoop on other broadcasters. 115114173Swollman 116149590Swollman# From Arthur David Olson (2005-08-22): 117149590Swollman# Paul has been careful to use the "US" rules only in those locations 118149590Swollman# that are part of the United States; this reflects the real scope of 119149590Swollman# U.S. government action. So even though the "US" rules have changed 120149590Swollman# in the latest release, other countries won't be affected. 121149590Swollman 1222742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 12375267SwollmanRule US 1918 1919 - Mar lastSun 2:00 1:00 D 1242742SwollmanRule US 1918 1919 - Oct lastSun 2:00 0 S 1252742SwollmanRule US 1942 only - Feb 9 2:00 1:00 W # War 12667578SwollmanRule US 1945 only - Aug 14 23:00u 1:00 P # Peace 127279706SedwinRule US 1945 only - Sep lastSun 2:00 0 S 128149514SwollmanRule US 1967 2006 - Oct lastSun 2:00 0 S 1292742SwollmanRule US 1967 1973 - Apr lastSun 2:00 1:00 D 1302742SwollmanRule US 1974 only - Jan 6 2:00 1:00 D 1312742SwollmanRule US 1975 only - Feb 23 2:00 1:00 D 1322742SwollmanRule US 1976 1986 - Apr lastSun 2:00 1:00 D 133149514SwollmanRule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 134149514SwollmanRule US 2007 max - Mar Sun>=8 2:00 1:00 D 135149514SwollmanRule US 2007 max - Nov Sun>=1 2:00 0 S 1362742Swollman 137153761Swollman# From Arthur David Olson, 2005-12-19 138153761Swollman# We generate the files specified below to guard against old files with 139153761Swollman# obsolete information being left in the time zone binary directory. 140153761Swollman# We limit the list to names that have appeared in previous versions of 141153761Swollman# this time zone package. 142153761Swollman# We do these as separate Zones rather than as Links to avoid problems if 143153761Swollman# a particular place changes whether it observes DST. 144153761Swollman# We put these specifications here in the northamerica file both to 145153761Swollman# increase the chances that they'll actually get compiled and to 146153761Swollman# avoid the need to duplicate the US rules in another file. 147153761Swollman 148153761Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 149153761SwollmanZone EST -5:00 - EST 150153761SwollmanZone MST -7:00 - MST 151153761SwollmanZone HST -10:00 - HST 152153761SwollmanZone EST5EDT -5:00 US E%sT 153153761SwollmanZone CST6CDT -6:00 US C%sT 154153761SwollmanZone MST7MDT -7:00 US M%sT 155153761SwollmanZone PST8PDT -8:00 US P%sT 156153761Swollman 15719878Swollman# From Bob Devine (1988-01-28): 1582742Swollman# ...Alaska (and Hawaii) had the timezone names changed in 1967. 1592742Swollman# old new 1602742Swollman# Pacific Standard Time(PST) -same- 1612742Swollman# Yukon Standard Time(YST) -same- 1622742Swollman# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 1632742Swollman# Nome Standard Time (NT) Bering Standard Time (BST) 1642742Swollman# 1652742Swollman# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 1662742Swollman# The YST zone now covers nearly all of the state, AHST just part 1672742Swollman# of the Aleutian islands. No DST. 1682742Swollman 16914343Swollman# From Paul Eggert (1995-12-19): 170257681Sedwin# The tables below use 'NST', not 'NT', for Nome Standard Time. 171257681Sedwin# I invented 'CAWT' for Central Alaska War Time. 17214343Swollman 17319878Swollman# From U. S. Naval Observatory (1989-01-19): 1742742Swollman# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 1752742Swollman# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 1762742Swollman# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 1772742Swollman# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 1782742Swollman# USA MOUNTAIN 7 H BEHIND UTC DENVER 1792742Swollman# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 1802742Swollman# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 1812742Swollman# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 1822742Swollman# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 1832742Swollman# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 1842742Swollman# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 185270728Spluknet# USA " 9 H BEHIND UTC APR 3 - OCT 30 1862742Swollman# USA HAWAII 10 H BEHIND UTC 1872742Swollman# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 1882742Swollman 18919878Swollman# From Arthur David Olson (1989-01-21): 1902742Swollman# The above dates are for 1988. 1912742Swollman# Note the "AKST" and "AKDT" abbreviations, the claim that there's 1922742Swollman# no DST in Samoa, and the claim that there is DST in Alaska and the 1932742Swollman# Aleutians. 1942742Swollman 19519878Swollman# From Arthur David Olson (1988-02-13): 1962742Swollman# Legal standard time zone names, from United States Code (1982 Edition and 1972742Swollman# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 19819878Swollman# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 1992742Swollman# took effect), as explained in sections 263 and 261: 2002742Swollman# (none) 2012742Swollman# United States standard eastern time 2022742Swollman# United States standard mountain time 2032742Swollman# United States standard central time 2042742Swollman# United States standard Pacific time 2052742Swollman# (none) 2062742Swollman# United States standard Alaska time 2072742Swollman# (none) 20819878Swollman# Next, names from 1967-04-01 until 1983-11-30 (the date for 2092742Swollman# public law 98-181): 2102742Swollman# Atlantic standard time 2112742Swollman# eastern standard time 2122742Swollman# central standard time 2132742Swollman# mountain standard time 2142742Swollman# Pacific standard time 2152742Swollman# Yukon standard time 2162742Swollman# Alaska-Hawaii standard time 2172742Swollman# Bering standard time 21819878Swollman# And after 1983-11-30: 2192742Swollman# Atlantic standard time 2202742Swollman# eastern standard time 2212742Swollman# central standard time 2222742Swollman# mountain standard time 2232742Swollman# Pacific standard time 2242742Swollman# Alaska standard time 2252742Swollman# Hawaii-Aleutian standard time 2262742Swollman# Samoa standard time 2272742Swollman# The law doesn't give abbreviations. 22814343Swollman# 22975267Swollman# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 23075267Swollman# Public law 106-564 (2000-12-23) introduced the abbreviation 23175267Swollman# "Chamorro Standard Time" for time in Guam and the Northern Marianas. 23275267Swollman# See the file "australasia". 233158421Swollman 234149514Swollman# From Arthur David Olson, 2005-08-09 235149514Swollman# The following was signed into law on 2005-08-08. 236149514Swollman# 237149514Swollman# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 238270728Spluknet# (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 239149514Swollman# U.S.C. 260a(a)) is amended-- 240270728Spluknet# (1) by striking "first Sunday of April" and inserting "second 241270728Spluknet# Sunday of March"; and 242270728Spluknet# (2) by striking "last Sunday of October" and inserting "first 243149514Swollman# Sunday of November'. 244270728Spluknet# (b) Effective Date.--Subsection (a) shall take effect 1 year after the 245149514Swollman# date of enactment of this Act or March 1, 2007, whichever is later. 246270728Spluknet# (c) Report to Congress.--Not later than 9 months after the effective 247149514Swollman# date stated in subsection (b), the Secretary shall report to Congress 248149514Swollman# on the impact of this section on energy consumption in the United 249149514Swollman# States. 250270728Spluknet# (d) Right to Revert.--Congress retains the right to revert the 251149514Swollman# Daylight Saving Time back to the 2005 time schedules once the 252149514Swollman# Department study is complete. 2532742Swollman 25486222Swollman# US eastern time, represented by New York 25575267Swollman 25667578Swollman# Connecticut, Delaware, District of Columbia, most of Florida, 257149590Swollman# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 258149590Swollman# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 259114173Swollman# New Hampshire, New Jersey, New York, North Carolina, Ohio, 260114173Swollman# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 261114173Swollman# Vermont, Virginia, West Virginia 26267578Swollman 263149514Swollman# From Dave Cantor (2004-11-02): 264149514Swollman# Early this summer I had the occasion to visit the Mount Washington 265149514Swollman# Observatory weather station atop (of course!) Mount Washington [, NH].... 266149514Swollman# One of the staff members said that the station was on Eastern Standard Time 267149514Swollman# and didn't change their clocks for Daylight Saving ... so that their 268149514Swollman# reports will always have times which are 5 hours behind UTC. 269149514Swollman 270153670Swollman# From Paul Eggert (2005-08-26): 271153670Swollman# According to today's Huntsville Times 272273718Sedwin# http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 273153670Swollman# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 274153670Swollman# in Russell County, Lanett in Chambers County and some towns in Lee County, 275153670Swollman# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 276153670Swollman# Roberts, city administrator in Phenix City. as saying "We are in the Central 277153670Swollman# time zone, but we do go by the Eastern time zone because so many people work 278158421Swollman# in Columbus." 279153670Swollman 280273718Sedwin# From Paul Eggert (2014-09-06): 281273718Sedwin# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 282273718Sedwin# says that New York City Hall time was 3 minutes 58.4 seconds fast of 283273718Sedwin# Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the 284273718Sedwin# nearest second. 285273718Sedwin 28614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 28714343SwollmanRule NYC 1920 only - Mar lastSun 2:00 1:00 D 28814343SwollmanRule NYC 1920 only - Oct lastSun 2:00 0 S 28914343SwollmanRule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 29014343SwollmanRule NYC 1921 1954 - Sep lastSun 2:00 0 S 29114343SwollmanRule NYC 1955 1966 - Oct lastSun 2:00 0 S 29214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 293149514SwollmanZone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 29414343Swollman -5:00 US E%sT 1920 29514343Swollman -5:00 NYC E%sT 1942 29614343Swollman -5:00 US E%sT 1946 29714343Swollman -5:00 NYC E%sT 1967 29814343Swollman -5:00 US E%sT 2992742Swollman 30086222Swollman# US central time, represented by Chicago 30167578Swollman 302136638Swollman# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 303136638Swollman# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 304136638Swollman# Washington counties), Illinois, western Indiana 305114173Swollman# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 306114173Swollman# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 307114173Swollman# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 308114173Swollman# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 309114173Swollman# western Tennessee, most of Texas, Wisconsin 31067578Swollman 311158421Swollman# From Larry M. Smith (2006-04-26) re Wisconsin: 312158421Swollman# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 313158421Swollman# is currently enforced at the 01:00 time of change. Because the local 314158421Swollman# "bar time" in the state corresponds to 02:00, a number of citations 315158421Swollman# are issued for the "sale of class 'B' alcohol after prohibited 316158421Swollman# hours" within the deviated hour of this change every year.... 317169811Swollman# 318169811Swollman# From Douglas R. Bomberg (2007-03-12): 319169811Swollman# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 320169811Swollman# Statue 175 closer in synch with the US Congress' intent.... 321169811Swollman# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 322158421Swollman 32314343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 32414343SwollmanRule Chicago 1920 only - Jun 13 2:00 1:00 D 32514343SwollmanRule Chicago 1920 1921 - Oct lastSun 2:00 0 S 32614343SwollmanRule Chicago 1921 only - Mar lastSun 2:00 1:00 D 32714343SwollmanRule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 32814343SwollmanRule Chicago 1922 1954 - Sep lastSun 2:00 0 S 32914343SwollmanRule Chicago 1955 1966 - Oct lastSun 2:00 0 S 33014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 331149514SwollmanZone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 33214343Swollman -6:00 US C%sT 1920 333273718Sedwin -6:00 Chicago C%sT 1936 Mar 1 2:00 334273718Sedwin -5:00 - EST 1936 Nov 15 2:00 33514343Swollman -6:00 Chicago C%sT 1942 33614343Swollman -6:00 US C%sT 1946 33714343Swollman -6:00 Chicago C%sT 1967 33814343Swollman -6:00 US C%sT 33986222Swollman# Oliver County, ND switched from mountain to central time on 1992-10-25. 340149514SwollmanZone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 341273718Sedwin -7:00 US M%sT 1992 Oct 25 2:00 34286222Swollman -6:00 US C%sT 343158421Swollman# Morton County, ND, switched from mountain to central time on 344158421Swollman# 2003-10-26, except for the area around Mandan which was already central time. 345158421Swollman# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 346158421Swollman# Officially this switch also included part of Sioux County, and 347158421Swollman# Jones, Mellette, and Todd Counties in South Dakota; 348158421Swollman# but in practice these other counties were already observing central time. 349158421Swollman# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 350273718SedwinZone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 351273718Sedwin -7:00 US M%sT 2003 Oct 26 2:00 352158421Swollman -6:00 US C%sT 3532742Swollman 354219149Sedwin# From Josh Findley (2011-01-21): 355219149Sedwin# ...it appears that Mercer County, North Dakota, changed from the 356219149Sedwin# mountain time zone to the central time zone at the last transition from 357219149Sedwin# daylight-saving to standard time (on Nov. 7, 2010): 358219149Sedwin# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 359219149Sedwin# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 360219149Sedwin 361219149Sedwin# From Andy Lipscomb (2011-01-24): 362219149Sedwin# ...according to the Census Bureau, the largest city is Beulah (although 363219149Sedwin# it's commonly referred to as Beulah-Hazen, with Hazen being the next 364219149Sedwin# largest city in Mercer County). Google Maps places Beulah's city hall 365270728Spluknet# at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset 366270728Spluknet# of 6h47'07". 367219149Sedwin 368273718SedwinZone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 369273718Sedwin -7:00 US M%sT 2010 Nov 7 2:00 370219149Sedwin -6:00 US C%sT 371219149Sedwin 37286222Swollman# US mountain time, represented by Denver 37367578Swollman# 374136638Swollman# Colorado, far western Kansas, Montana, western 37586222Swollman# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 376171948Sedwin# New Mexico, southwestern North Dakota, 37775267Swollman# western South Dakota, far western Texas (El Paso County, Hudspeth County, 37875267Swollman# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 37967578Swollman# 38014343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 38114343SwollmanRule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 38214343SwollmanRule Denver 1920 only - Oct lastSun 2:00 0 S 38314343SwollmanRule Denver 1921 only - May 22 2:00 0 S 38414343SwollmanRule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 38514343SwollmanRule Denver 1965 1966 - Oct lastSun 2:00 0 S 3862742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 387149514SwollmanZone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 38815309Swollman -7:00 US M%sT 1920 38915309Swollman -7:00 Denver M%sT 1942 39015309Swollman -7:00 US M%sT 1946 39115309Swollman -7:00 Denver M%sT 1967 39215309Swollman -7:00 US M%sT 3932742Swollman 39414343Swollman# US Pacific time, represented by Los Angeles 39567578Swollman# 396136638Swollman# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 397263041Sedwin# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 398263041Sedwin# north of the Salmon River, and the towns of Burgdorf and Warren), 399263041Sedwin# Nevada (except West Wendover), Oregon (except the northern 3/4 of 400263041Sedwin# Malheur county), and Washington 40167578Swollman# 40214343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 40314343SwollmanRule CA 1948 only - Mar 14 2:00 1:00 D 40414343SwollmanRule CA 1949 only - Jan 1 2:00 0 S 40514343SwollmanRule CA 1950 1966 - Apr lastSun 2:00 1:00 D 40614343SwollmanRule CA 1950 1961 - Sep lastSun 2:00 0 S 40714343SwollmanRule CA 1962 1966 - Oct lastSun 2:00 0 S 40814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 409149514SwollmanZone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 41014343Swollman -8:00 US P%sT 1946 41114343Swollman -8:00 CA P%sT 1967 41214343Swollman -8:00 US P%sT 4138029Swollman 41414343Swollman# Alaska 41514343Swollman# AK%sT is the modern abbreviation for -9:00 per USNO. 41614343Swollman# 41786222Swollman# From Paul Eggert (2001-05-30): 41814343Swollman# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 41919878Swollman# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 42075267Swollman# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 42175267Swollman# also a Friday. Include only the time zone part of this transition, 42275267Swollman# ignoring the switch from Julian to Gregorian, since we can't represent 42375267Swollman# the Julian calendar. 42414343Swollman# 42586222Swollman# As far as we know, none of the exact locations mentioned below were 42686222Swollman# permanently inhabited in 1867 by anyone using either calendar. 42786222Swollman# (Yakutat was colonized by the Russians in 1799, but the settlement 42886222Swollman# was destroyed in 1805 by a Yakutat-kon war party.) However, there 42986222Swollman# were nearby inhabitants in some cases and for our purposes perhaps 43086222Swollman# it's best to simply use the official transition. 431219411Sedwin 432270728Spluknet# From Paul Eggert (2014-07-18): 433270728Spluknet# One opinion of the early-1980s turmoil in Alaska over time zones and 434270728Spluknet# daylight saving time appeared as graffiti on a Juneau airport wall: 435270728Spluknet# "Welcome to Juneau. Please turn your watch back to the 19th century." 436270728Spluknet# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. 437270728Spluknet# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html 438219411Sedwin# 439270728Spluknet# Steve Ferguson (2011-01-31) referred to the following source: 440270728Spluknet# Norris F. Keeping time in Alaska: national directives, local response. 441270728Spluknet# Alaska History 2001;16(1-2). 442270728Spluknet# http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ 443219411Sedwin 444219411Sedwin# From Arthur David Olson (2011-02-01): 445219411Sedwin# Here's database-relevant material from the 2001 "Alaska History" article: 446219411Sedwin# 447219411Sedwin# On September 20 [1979]...DOT...officials decreed that on April 27, 448219411Sedwin# 1980, Juneau and other nearby communities would move to Yukon Time. 449219411Sedwin# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 450219411Sedwin# Pacific Time. 451219411Sedwin# 452219411Sedwin# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 453219411Sedwin# Department's September 1979 decision. Juneau and other communities in 454219411Sedwin# northern Southeast reverted to Pacific Time on October 26. 455219411Sedwin# 456219411Sedwin# On October 28 [1983]...the Metlakatla Indian Community Council voted 457219411Sedwin# unanimously to keep the reservation on Pacific Time. 458219411Sedwin# 459219411Sedwin# According to DOT official Joanne Petrie, Indian reservations are not 460219411Sedwin# bound to follow time zones imposed by neighboring jurisdictions. 461219411Sedwin# 462219411Sedwin# (The last is consistent with how the database now handles the Navajo 463219411Sedwin# Nation.) 464219411Sedwin 465219411Sedwin# From Arthur David Olson (2011-02-09): 466219411Sedwin# I just spoke by phone with a staff member at the Metlakatla Indian 467219411Sedwin# Community office (using contact information available at 468219411Sedwin# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 469219411Sedwin# It's shortly after 1:00 here on the east coast of the United States; 470219411Sedwin# the staffer said it was shortly after 10:00 there. When I asked whether 471270728Spluknet# that meant they were on Pacific time, they said no - they were on their 472219411Sedwin# own time. I asked about daylight saving; they said it wasn't used. I 473219411Sedwin# did not inquire about practices in the past. 474219411Sedwin 475226289Sedwin# From Arthur David Olson (2011-08-17): 476226289Sedwin# For lack of better information, assume that Metlakatla's 477226289Sedwin# abandonment of use of daylight saving resulted from the 1983 vote. 478226289Sedwin 47914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 48075267SwollmanZone America/Juneau 15:02:19 - LMT 1867 Oct 18 48175267Swollman -8:57:41 - LMT 1900 Aug 20 12:00 48214343Swollman -8:00 - PST 1942 48314343Swollman -8:00 US P%sT 1946 48414343Swollman -8:00 - PST 1969 485273718Sedwin -8:00 US P%sT 1980 Apr 27 2:00 486273718Sedwin -9:00 US Y%sT 1980 Oct 26 2:00 487273718Sedwin -8:00 US P%sT 1983 Oct 30 2:00 488136638Swollman -9:00 US Y%sT 1983 Nov 30 48914343Swollman -9:00 US AK%sT 490226289SedwinZone America/Sitka 14:58:47 - LMT 1867 Oct 18 491219411Sedwin -9:01:13 - LMT 1900 Aug 20 12:00 492219411Sedwin -8:00 - PST 1942 493219411Sedwin -8:00 US P%sT 1946 494219411Sedwin -8:00 - PST 1969 495273718Sedwin -8:00 US P%sT 1983 Oct 30 2:00 496219411Sedwin -9:00 US Y%sT 1983 Nov 30 497219411Sedwin -9:00 US AK%sT 498219411SedwinZone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 499219411Sedwin -8:46:18 - LMT 1900 Aug 20 12:00 500219411Sedwin -8:00 - PST 1942 501219411Sedwin -8:00 US P%sT 1946 502219411Sedwin -8:00 - PST 1969 503273718Sedwin -8:00 US P%sT 1983 Oct 30 2:00 504270728Spluknet -8:00 - PST 50575267SwollmanZone America/Yakutat 14:41:05 - LMT 1867 Oct 18 50675267Swollman -9:18:55 - LMT 1900 Aug 20 12:00 50714343Swollman -9:00 - YST 1942 50814343Swollman -9:00 US Y%sT 1946 50914343Swollman -9:00 - YST 1969 510136638Swollman -9:00 US Y%sT 1983 Nov 30 51114343Swollman -9:00 US AK%sT 51275267SwollmanZone America/Anchorage 14:00:24 - LMT 1867 Oct 18 51375267Swollman -9:59:36 - LMT 1900 Aug 20 12:00 51414343Swollman -10:00 - CAT 1942 515158421Swollman -10:00 US CAT/CAWT 1945 Aug 14 23:00u 516158421Swollman -10:00 US CAT/CAPT 1946 # Peace 51714343Swollman -10:00 - CAT 1967 Apr 51814343Swollman -10:00 - AHST 1969 519273718Sedwin -10:00 US AH%sT 1983 Oct 30 2:00 520136638Swollman -9:00 US Y%sT 1983 Nov 30 52114343Swollman -9:00 US AK%sT 52275267SwollmanZone America/Nome 12:58:21 - LMT 1867 Oct 18 52375267Swollman -11:01:38 - LMT 1900 Aug 20 12:00 52414343Swollman -11:00 - NST 1942 52514343Swollman -11:00 US N%sT 1946 52614343Swollman -11:00 - NST 1967 Apr 52714343Swollman -11:00 - BST 1969 528273718Sedwin -11:00 US B%sT 1983 Oct 30 2:00 529136638Swollman -9:00 US Y%sT 1983 Nov 30 53014343Swollman -9:00 US AK%sT 53175267SwollmanZone America/Adak 12:13:21 - LMT 1867 Oct 18 53275267Swollman -11:46:38 - LMT 1900 Aug 20 12:00 53314343Swollman -11:00 - NST 1942 53414343Swollman -11:00 US N%sT 1946 53514343Swollman -11:00 - NST 1967 Apr 53614343Swollman -11:00 - BST 1969 537273718Sedwin -11:00 US B%sT 1983 Oct 30 2:00 538136638Swollman -10:00 US AH%sT 1983 Nov 30 53914343Swollman -10:00 US HA%sT 540149514Swollman# The following switches don't quite make our 1970 cutoff. 541149514Swollman# 54214343Swollman# Shanks writes that part of southwest Alaska (e.g. Aniak) 54314343Swollman# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 54414343Swollman# and another part (e.g. Akiak) made the same switch five weeks later. 545149514Swollman# 546149514Swollman# From David Flater (2004-11-09): 547149514Swollman# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 548149514Swollman# Historic Preservation Commission, provided this information, which 549149514Swollman# suggests that Unalaska deviated from statutory time from early 1967 550149514Swollman# possibly until 1983: 551149514Swollman# 552149514Swollman# Minutes of the Unalaska City Council Meeting, January 10, 1967: 553149514Swollman# "Except for St. Paul and Akutan, Unalaska is the only important 554149514Swollman# location not on Alaska Standard Time. The following resolution was 555273718Sedwin# made by William Robinson and seconded by Henry Swanson: Be it 556149514Swollman# resolved that the City of Unalaska hereby goes to Alaska Standard 557149514Swollman# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 558149514Swollman# January 14, Alaska Standard Time.) This resolution was passed with 559149514Swollman# three votes for and one against." 5602742Swollman 56114343Swollman# Hawaii 562218122Sedwin 563218122Sedwin# From Arthur David Olson (2010-12-09): 564218122Sedwin# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 565218122Sedwin# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 566218122Sedwin# the article is available at 567218122Sedwin# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 568218122Sedwin# and indicates that standard time was adopted effective noon, January 569218122Sedwin# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 570218122Sedwin# saving for the period between the last Sunday of each April and the 571218122Sedwin# last Sunday of each September, but less than a month later repealed the 572218122Sedwin# act," (page 220), that year-round daylight saving time was in effect 573218122Sedwin# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 574218122Sedwin# when clocks changed) and that clocks were changed by 30 minutes 575218122Sedwin# effective the second Sunday of June, 1947 (page 219, with no time of 576218122Sedwin# day given for when clocks changed). A footnote for the 1933 changes 577218122Sedwin# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 578218122Sedwin# and Act 163 (approved 21 May 1933)." 579218122Sedwin 580218122Sedwin# From Arthur David Olson (2011-01-19): 581218122Sedwin# The following is from "Laws of the Territory of Hawaii Passed by the 582218122Sedwin# Seventeenth Legislature: Regular Session 1933," available (as of 583218122Sedwin# 2011-01-19) at American University's Pence Law Library. Page 85: "Act 584218122Sedwin# 90...At 2 o'clock ante meridian of the last Sunday in April of each 585218122Sedwin# year, the standard time of this Territory shall be advanced one 586218122Sedwin# hour...This Act shall take effect upon its approval. Approved this 26th 587218122Sedwin# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 588273718Sedwin# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 589218122Sedwin# hereby repealed...This Act shall take effect upon its approval, upon 590218122Sedwin# which date the standard time of this Territory shall be restored to 591218122Sedwin# that existing immediately prior to the taking effect of said Act 90. 592218122Sedwin# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 593218122Sedwin# of the Territory of Hawaii." 59414343Swollman# 595218122Sedwin# Note that 1933-05-21 was a Sunday. 596218122Sedwin# We're left to guess the time of day when Act 163 was approved; guess noon. 597218122Sedwin 598273718Sedwin# Zone NAME GMTOFF RULES FORMAT [UNTIL] 599273718SedwinZone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 600273718Sedwin -10:30 - HST 1933 Apr 30 2:00 601273718Sedwin -10:30 1:00 HDT 1933 May 21 12:00 602273718Sedwin -10:30 - HST 1942 Feb 9 2:00 603273718Sedwin -10:30 1:00 HDT 1945 Sep 30 2:00 604273718Sedwin -10:30 - HST 1947 Jun 8 2:00 60514343Swollman -10:00 - HST 606257681SedwinLink Pacific/Honolulu Pacific/Johnston 607257681Sedwin 60814343Swollman# Now we turn to US areas that have diverged from the consensus since 1970. 60914343Swollman 61014343Swollman# Arizona mostly uses MST. 611114173Swollman 612114173Swollman# From Paul Eggert (2002-10-20): 613114173Swollman# 614114173Swollman# The information in the rest of this paragraph is derived from the 615270728Spluknet# Daylight Saving Time web page 616270728Spluknet# <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23) 617270728Spluknet# maintained by the Arizona State Library, Archives and Public Records. 618114173Swollman# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 619114173Swollman# time, but by federal law railroads, airlines, bus lines, military 620114173Swollman# personnel, and some engaged in interstate commerce continued to 621114173Swollman# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 622114173Swollman# Gazette says that was the date the law changed, and that 04-01 was 623114173Swollman# the date the state's clocks would change. In 1945 the State of 624114173Swollman# Arizona used standard time all year, again with exceptions only as 625114173Swollman# mandated by federal law. Arizona observed DST in 1967, but Arizona 626114173Swollman# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 627114173Swollman# 628114173Swollman# Shanks says the 1944 experiment came to an end on 1944-03-17. 629114173Swollman# Go with the Arizona State Library instead. 630114173Swollman 631273718Sedwin# Zone NAME GMTOFF RULES FORMAT [UNTIL] 632149514SwollmanZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 633273718Sedwin -7:00 US M%sT 1944 Jan 1 0:01 634273718Sedwin -7:00 - MST 1944 Apr 1 0:01 635273718Sedwin -7:00 US M%sT 1944 Oct 1 0:01 63614343Swollman -7:00 - MST 1967 637114173Swollman -7:00 US M%sT 1968 Mar 21 63814343Swollman -7:00 - MST 63919878Swollman# From Arthur David Olson (1988-02-13): 64014343Swollman# A writer from the Inter Tribal Council of Arizona, Inc., 641136638Swollman# notes in private correspondence dated 1987-12-28 that "Presently, only the 6422742Swollman# Navajo Nation participates in the Daylight Saving Time policy, due to its 6432742Swollman# large size and location in three states." (The "only" means that other 6442742Swollman# tribal nations don't use DST.) 645257681Sedwin# 646257681Sedwin# From Paul Eggert (2013-08-26): 647257681Sedwin# See America/Denver for a zone appropriate for the Navajo Nation. 6482742Swollman 649136638Swollman# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 650136638Swollman# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 651136638Swollman# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 652136638Swollman# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 653171948Sedwin# Teton, Twin Falls, Valley, Washington counties, and the southern 654171948Sedwin# quarter of Idaho county) and eastern Oregon (most of Malheur County) 655136638Swollman# switched four weeks late in 1974. 656149514Swollman# 65714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 658149514SwollmanZone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 659273718Sedwin -8:00 US P%sT 1923 May 13 2:00 66014343Swollman -7:00 US M%sT 1974 661273718Sedwin -7:00 - MST 1974 Feb 3 2:00 66214343Swollman -7:00 US M%sT 6632742Swollman 66414343Swollman# Indiana 66514343Swollman# 66658787Sru# For a map of Indiana's time zone regions, see: 667273718Sedwin# http://en.wikipedia.org/wiki/Time_in_Indiana 66858787Sru# 669171948Sedwin# From Paul Eggert (2007-08-17): 670149590Swollman# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 671149590Swollman# with the following exceptions: 672149590Swollman# 673149590Swollman# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 674270728Spluknet# Vanderburgh, and Warrick counties have been like America/Chicago. 675149590Swollman# 676149590Swollman# - Dearborn and Ohio counties have been like America/New_York. 677149590Swollman# 678149590Swollman# - Clark, Floyd, and Harrison counties have been like 679149590Swollman# America/Kentucky/Louisville. 680149590Swollman# 681171948Sedwin# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 682171948Sedwin# and Switzerland counties have their own time zone histories as noted below. 683158421Swollman# 684158421Swollman# Shanks partitioned Indiana into 345 regions, each with its own time history, 685257681Sedwin# and wrote "Even newspaper reports present contradictory information." 686158421Swollman# Those Hoosiers! Such a flighty and changeable people! 68714343Swollman# Fortunately, most of the complexity occurred before our cutoff date of 1970. 68814343Swollman# 68914343Swollman# Other than Indianapolis, the Indiana place names are so nondescript 690257681Sedwin# that they would be ambiguous if we left them at the 'America' level. 691257681Sedwin# So we reluctantly put them all in a subdirectory 'America/Indiana'. 69275267Swollman 693270728Spluknet# From Paul Eggert (2014-06-26): 694270728Spluknet# https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana 695270728Spluknet# says "DOT is relocating the time zone boundary in Indiana to move Starke, 696158421Swollman# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 697158421Swollman# Eastern Time Zone to the Central Time Zone.... The effective date of 698270728Spluknet# this rule is 2 a.m. EST Sunday, April 2, 2006, which is the 699158421Swollman# changeover date from standard time to Daylight Saving Time." 700270728Spluknet# Strictly speaking, this meant the affected counties changed their 701270728Spluknet# clocks twice that night, but this obviously was in error. The intent 702270728Spluknet# was that 01:59:59 EST be followed by 02:00:00 CDT. 703158421Swollman 704169811Swollman# From Gwillim Law (2007-02-10): 705169811Swollman# The Associated Press has been reporting that Pulaski County, Indiana is 706169811Swollman# going to switch from Central to Eastern Time on March 11, 2007.... 707169811Swollman# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 708169811Swollman 70914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 71014343SwollmanRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 71114343SwollmanRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 71214343SwollmanRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 71314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 714273718SedwinZone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 71514343Swollman -6:00 US C%sT 1920 71614343Swollman -6:00 Indianapolis C%sT 1942 71714343Swollman -6:00 US C%sT 1946 718273718Sedwin -6:00 Indianapolis C%sT 1955 Apr 24 2:00 719273718Sedwin -5:00 - EST 1957 Sep 29 2:00 720273718Sedwin -6:00 - CST 1958 Apr 27 2:00 72114343Swollman -5:00 - EST 1969 72214343Swollman -5:00 US E%sT 1971 723149514Swollman -5:00 - EST 2006 724149514Swollman -5:00 US E%sT 7252742Swollman# 726158421Swollman# Eastern Crawford County, Indiana, left its clocks alone in 1974, 727158421Swollman# as well as from 1976 through 2005. 72814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 72914343SwollmanRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 73014343SwollmanRule Marengo 1951 only - Sep lastSun 2:00 0 S 73114343SwollmanRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 73214343SwollmanRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 73314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 734149514SwollmanZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 73514343Swollman -6:00 US C%sT 1951 736273718Sedwin -6:00 Marengo C%sT 1961 Apr 30 2:00 73714343Swollman -5:00 - EST 1969 738273718Sedwin -5:00 US E%sT 1974 Jan 6 2:00 739273718Sedwin -6:00 1:00 CDT 1974 Oct 27 2:00 74014343Swollman -5:00 US E%sT 1976 741149514Swollman -5:00 - EST 2006 742149514Swollman -5:00 US E%sT 74314343Swollman# 744171948Sedwin# Daviess, Dubois, Knox, and Martin Counties, Indiana, 745171948Sedwin# switched from eastern to central time in April 2006, then switched back 746171948Sedwin# in November 2007. 747158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 748158421SwollmanRule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 749158421SwollmanRule Vincennes 1946 only - Sep lastSun 2:00 0 S 750158421SwollmanRule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 751158421SwollmanRule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 752158421SwollmanRule Vincennes 1955 only - May 1 0:00 1:00 D 753158421SwollmanRule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 754158421SwollmanRule Vincennes 1960 only - Oct lastSun 2:00 0 S 755158421SwollmanRule Vincennes 1961 only - Sep lastSun 2:00 0 S 756158421SwollmanRule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 757158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 758158421SwollmanZone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 759158421Swollman -6:00 US C%sT 1946 760273718Sedwin -6:00 Vincennes C%sT 1964 Apr 26 2:00 761158421Swollman -5:00 - EST 1969 762158421Swollman -5:00 US E%sT 1971 763273718Sedwin -5:00 - EST 2006 Apr 2 2:00 764273718Sedwin -6:00 US C%sT 2007 Nov 4 2:00 765171948Sedwin -5:00 US E%sT 766171948Sedwin# 767171948Sedwin# Perry County, Indiana, switched from eastern to central time in April 2006. 768171948Sedwin# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 769171948SedwinRule Perry 1946 only - Apr lastSun 2:00 1:00 D 770171948SedwinRule Perry 1946 only - Sep lastSun 2:00 0 S 771171948SedwinRule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 772171948SedwinRule Perry 1953 1959 - Sep lastSun 2:00 0 S 773171948SedwinRule Perry 1955 only - May 1 0:00 1:00 D 774171948SedwinRule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 775171948SedwinRule Perry 1960 only - Oct lastSun 2:00 0 S 776171948SedwinRule Perry 1961 only - Sep lastSun 2:00 0 S 777171948SedwinRule Perry 1962 1963 - Oct lastSun 2:00 0 S 778171948Sedwin# Zone NAME GMTOFF RULES FORMAT [UNTIL] 779171948SedwinZone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 780171948Sedwin -6:00 US C%sT 1946 781273718Sedwin -6:00 Perry C%sT 1964 Apr 26 2:00 782171948Sedwin -5:00 - EST 1969 783171948Sedwin -5:00 US E%sT 1971 784273718Sedwin -5:00 - EST 2006 Apr 2 2:00 785158421Swollman -6:00 US C%sT 786158421Swollman# 787158421Swollman# Pike County, Indiana moved from central to eastern time in 1977, 788171948Sedwin# then switched back in 2006, then switched back again in 2007. 789158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 790158421SwollmanRule Pike 1955 only - May 1 0:00 1:00 D 791158421SwollmanRule Pike 1955 1960 - Sep lastSun 2:00 0 S 792158421SwollmanRule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 793158421SwollmanRule Pike 1961 1964 - Oct lastSun 2:00 0 S 794158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 795158421SwollmanZone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 796158421Swollman -6:00 US C%sT 1955 797273718Sedwin -6:00 Pike C%sT 1965 Apr 25 2:00 798273718Sedwin -5:00 - EST 1966 Oct 30 2:00 799273718Sedwin -6:00 US C%sT 1977 Oct 30 2:00 800273718Sedwin -5:00 - EST 2006 Apr 2 2:00 801273718Sedwin -6:00 US C%sT 2007 Nov 4 2:00 802171948Sedwin -5:00 US E%sT 803158421Swollman# 804158421Swollman# Starke County, Indiana moved from central to eastern time in 1991, 805158421Swollman# then switched back in 2006. 80619878Swollman# From Arthur David Olson (1991-10-28): 80719878Swollman# An article on page A3 of the Sunday, 1991-10-27 Washington Post 80814343Swollman# notes that Starke County switched from Central time to Eastern time as of 80919878Swollman# 1991-10-27. 81014343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 81114343SwollmanRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 81214343SwollmanRule Starke 1947 1954 - Sep lastSun 2:00 0 S 81314343SwollmanRule Starke 1955 1956 - Oct lastSun 2:00 0 S 81414343SwollmanRule Starke 1957 1958 - Sep lastSun 2:00 0 S 81514343SwollmanRule Starke 1959 1961 - Oct lastSun 2:00 0 S 81614343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 817149514SwollmanZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 81814343Swollman -6:00 US C%sT 1947 819273718Sedwin -6:00 Starke C%sT 1962 Apr 29 2:00 820273718Sedwin -5:00 - EST 1963 Oct 27 2:00 821273718Sedwin -6:00 US C%sT 1991 Oct 27 2:00 822273718Sedwin -5:00 - EST 2006 Apr 2 2:00 823158421Swollman -6:00 US C%sT 82414343Swollman# 825169811Swollman# Pulaski County, Indiana, switched from eastern to central time in 826169811Swollman# April 2006 and then switched back in March 2007. 827169811Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 828169811SwollmanRule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 829169811SwollmanRule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 830169811SwollmanRule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 831169811SwollmanRule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 832169811Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 833169811SwollmanZone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 834169811Swollman -6:00 US C%sT 1946 835273718Sedwin -6:00 Pulaski C%sT 1961 Apr 30 2:00 836169811Swollman -5:00 - EST 1969 837169811Swollman -5:00 US E%sT 1971 838273718Sedwin -5:00 - EST 2006 Apr 2 2:00 839273718Sedwin -6:00 US C%sT 2007 Mar 11 2:00 840169811Swollman -5:00 US E%sT 841169811Swollman# 842158421Swollman# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 84314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 844149514SwollmanZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 845273718Sedwin -6:00 US C%sT 1954 Apr 25 2:00 84614343Swollman -5:00 - EST 1969 84714343Swollman -5:00 US E%sT 1973 848149514Swollman -5:00 - EST 2006 849149514Swollman -5:00 US E%sT 8502742Swollman 85114343Swollman# Part of Kentucky left its clocks alone in 1974. 852149590Swollman# This also includes Clark, Floyd, and Harrison counties in Indiana. 85314343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 85414343SwollmanRule Louisville 1921 only - May 1 2:00 1:00 D 85514343SwollmanRule Louisville 1921 only - Sep 1 2:00 0 S 85614343SwollmanRule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 85714343SwollmanRule Louisville 1941 only - Sep lastSun 2:00 0 S 85814343SwollmanRule Louisville 1946 only - Jun 2 2:00 0 S 85914343SwollmanRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 86014343SwollmanRule Louisville 1956 1960 - Oct lastSun 2:00 0 S 86114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 862149514SwollmanZone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 86314343Swollman -6:00 US C%sT 1921 86414343Swollman -6:00 Louisville C%sT 1942 86514343Swollman -6:00 US C%sT 1946 866273718Sedwin -6:00 Louisville C%sT 1961 Jul 23 2:00 86714343Swollman -5:00 - EST 1968 868273718Sedwin -5:00 US E%sT 1974 Jan 6 2:00 869273718Sedwin -6:00 1:00 CDT 1974 Oct 27 2:00 87014343Swollman -5:00 US E%sT 87167578Swollman# 872158421Swollman# Wayne County, Kentucky 87358787Sru# 874270728Spluknet# From Lake Cumberland LIFE 875273718Sedwin# http://www.lake-cumberland.com/life/archive/news990129time.shtml 876270728Spluknet# (1999-01-29) via WKYM-101.7: 87758787Sru# Clinton County has joined Wayne County in asking the DoT to change from 87858787Sru# the Central to the Eastern time zone.... The Wayne County government made 87958787Sru# the same request in December. And while Russell County officials have not 88058787Sru# taken action, the majority of respondents to a poll conducted there in 88158787Sru# August indicated they would like to change to "fast time" also. 88258787Sru# The three Lake Cumberland counties are the farthest east of any U.S. 88358787Sru# location in the Central time zone. 88467578Swollman# 88567578Swollman# From Rich Wales (2000-08-29): 88667578Swollman# After prolonged debate, and despite continuing deep differences of opinion, 88767578Swollman# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 88875267Swollman# (-0500) time. They won't "fall back" this year. See Sara Shipley, 88975267Swollman# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 89086222Swollman# 89186222Swollman# From Paul Eggert (2001-07-16): 89286222Swollman# The final rule was published in the 893270728Spluknet# Federal Register 65, 160 (2000-08-17), pp 50154-50158. 894273718Sedwin# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22 895114173Swollman# 896149514SwollmanZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 89767578Swollman -6:00 US C%sT 1946 89867578Swollman -6:00 - CST 1968 89967578Swollman -6:00 US C%sT 2000 Oct 29 2:00 90067578Swollman -5:00 US E%sT 9012742Swollman 90267578Swollman 90367578Swollman# From Rives McDow (2000-08-30): 90467578Swollman# Here ... are all the changes in the US since 1985. 90567578Swollman# Kearny County, KS (put all of county on central; 90667578Swollman# previously split between MST and CST) ... 1990-10 90767578Swollman# Starke County, IN (from CST to EST) ... 1991-10 90867578Swollman# Oliver County, ND (from MST to CST) ... 1992-10 90967578Swollman# West Wendover, NV (from PST TO MST) ... 1999-10 91067578Swollman# Wayne County, KY (from CST to EST) ... 2000-10 91167578Swollman# 91286222Swollman# From Paul Eggert (2001-07-17): 91386222Swollman# We don't know where the line used to be within Kearny County, KS, 91486222Swollman# so omit that change for now. 91586222Swollman# See America/Indiana/Knox for the Starke County, IN change. 91686222Swollman# See America/North_Dakota/Center for the Oliver County, ND change. 91786222Swollman# West Wendover, NV officially switched from Pacific to mountain time on 91886222Swollman# 1999-10-31. See the 919270728Spluknet# Federal Register 64, 203 (1999-10-21), pp 56705-56707. 920273718Sedwin# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15 92186222Swollman# However, the Federal Register says that West Wendover already operated 92286222Swollman# on mountain time, and the rule merely made this official; 92386222Swollman# hence a separate tz entry is not needed. 92467578Swollman 92514343Swollman# Michigan 92614343Swollman# 92719878Swollman# From Bob Devine (1988-01-28): 92814343Swollman# Michigan didn't observe DST from 1968 to 1973. 92914343Swollman# 93058787Sru# From Paul Eggert (1999-03-31): 93158787Sru# Shanks writes that Michigan started using standard time on 1885-09-18, 93258787Sru# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 93358787Sru# that Detroit kept 93414343Swollman# 93514343Swollman# local time until 1900 when the City Council decreed that clocks should 93614343Swollman# be put back twenty-eight minutes to Central Standard Time. Half the 93714343Swollman# city obeyed, half refused. After considerable debate, the decision 93814343Swollman# was rescinded and the city reverted to Sun time. A derisive offer to 93914343Swollman# erect a sundial in front of the city hall was referred to the 94014343Swollman# Committee on Sewers. Then, in 1905, Central time was adopted 94114343Swollman# by city vote. 94214343Swollman# 94314343Swollman# This story is too entertaining to be false, so go with Howse over Shanks. 94414343Swollman# 94575267Swollman# From Paul Eggert (2001-03-06): 946257681Sedwin# Garland (1927) writes "Cleveland and Detroit advanced their clocks 947257681Sedwin# one hour in 1914." This change is not in Shanks. We have no more 94875267Swollman# info, so omit this for now. 94975267Swollman# 95014343Swollman# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 95114343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 95214343SwollmanRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 95314343SwollmanRule Detroit 1948 only - Sep lastSun 2:00 0 S 95414343SwollmanRule Detroit 1967 only - Jun 14 2:00 1:00 D 95514343SwollmanRule Detroit 1967 only - Oct lastSun 2:00 0 S 95614343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 95714343SwollmanZone America/Detroit -5:32:11 - LMT 1905 958273718Sedwin -6:00 - CST 1915 May 15 2:00 95914343Swollman -5:00 - EST 1942 96014343Swollman -5:00 US E%sT 1946 96114343Swollman -5:00 Detroit E%sT 1973 96214343Swollman -5:00 US E%sT 1975 963273718Sedwin -5:00 - EST 1975 Apr 27 2:00 96414343Swollman -5:00 US E%sT 96514343Swollman# 966158421Swollman# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 967158421Swollman# switched from EST to CST/CDT in 1973. 96814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 96914343SwollmanRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 97014343SwollmanRule Menominee 1946 only - Sep lastSun 2:00 0 S 97114343SwollmanRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 97214343SwollmanRule Menominee 1966 only - Oct lastSun 2:00 0 S 97314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 97414343SwollmanZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 97514343Swollman -6:00 US C%sT 1946 976273718Sedwin -6:00 Menominee C%sT 1969 Apr 27 2:00 977273718Sedwin -5:00 - EST 1973 Apr 29 2:00 97814343Swollman -6:00 US C%sT 97914343Swollman 9802742Swollman# Navassa 98186222Swollman# administered by the US Fish and Wildlife Service 98243543Swollman# claimed by US under the provisions of the 1856 Guano Islands Act 98343543Swollman# also claimed by Haiti 98443543Swollman# occupied 1857/1900 by the Navassa Phosphate Co 98586222Swollman# US lighthouse 1917/1996-09 98643543Swollman# currently uninhabited 987257681Sedwin# see Mark Fineman, "An Isle Rich in Guano and Discord", 98843543Swollman# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 98943543Swollman# Jimmy Skaggs, _The Great Guano Rush_ (1994). 99014343Swollman 9912742Swollman################################################################################ 9922742Swollman 9932742Swollman 994274559Sedwin# From Paul Eggert (2014-10-31): 995274559Sedwin# 996274559Sedwin# Unless otherwise specified, the source for data through 1990 is: 997158421Swollman# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 998158421Swollman# San Diego: ACS Publications, Inc. (2003). 999274559Sedwin# Unfortunately this book contains many errors and cites no sources. 10002742Swollman# 100186222Swollman# Gwillim Law writes that a good source 100220094Swollman# for recent time zone data is the International Air Transport 100320094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 100420094Swollman# published semiannually. Law sent in several helpful summaries 1005274559Sedwin# of the IATA's data after 1990. Except where otherwise noted, 1006274559Sedwin# IATA SSIM is the source for entries after 1990. 100720094Swollman# 1008121098Swollman# Other sources occasionally used include: 10092742Swollman# 1010121098Swollman# Edward W. Whitman, World Time Differences, 1011121098Swollman# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1012121098Swollman# which I found in the UCLA library. 1013121098Swollman# 1014121098Swollman# William Willett, The Waste of Daylight, 19th edition 1015267473Sedwin# <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf> 1016267473Sedwin# [PDF] (1914-03) 1017121098Swollman# 1018248307Sedwin# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1019248307Sedwin# <http://www.jstor.org/stable/1774359>. 1020248307Sedwin# 1021257681Sedwin# See the 'europe' file for Greenland. 10222742Swollman 10232742Swollman# Canada 10242742Swollman 1025270728Spluknet# From Alain LaBont�� (1994-11-14): 10269908Swollman# I post here the time zone abbreviations standardized in Canada 10279908Swollman# for both English and French in the CAN/CSA-Z234.4-89 standard.... 10289908Swollman# 1029270728Spluknet# UTC Standard time Daylight saving time 10309908Swollman# offset French English French English 10319908Swollman# -2:30 - - HAT NDT 10329908Swollman# -3 - - HAA ADT 10339908Swollman# -3:30 HNT NST - - 10349908Swollman# -4 HNA AST HAE EDT 10359908Swollman# -5 HNE EST HAC CDT 10369908Swollman# -6 HNC CST HAR MDT 10379908Swollman# -7 HNR MST HAP PDT 10389908Swollman# -8 HNP PST HAY YDT 10399908Swollman# -9 HNY YST - - 10409908Swollman# 10419908Swollman# HN: Heure Normale ST: Standard Time 1042270728Spluknet# HA: Heure Avanc��e DT: Daylight saving Time 10439908Swollman# 10449908Swollman# A: de l'Atlantique Atlantic 10459908Swollman# C: du Centre Central 10469908Swollman# E: de l'Est Eastern 10479908Swollman# M: Mountain 10489908Swollman# N: Newfoundland 10499908Swollman# P: du Pacifique Pacific 10509908Swollman# R: des Rocheuses 10519908Swollman# T: de Terre-Neuve 10529908Swollman# Y: du Yukon Yukon 10539908Swollman# 1054149514Swollman# From Paul Eggert (1994-11-22): 10559908Swollman# Alas, this sort of thing must be handled by localization software. 10562742Swollman 1057273718Sedwin# Unless otherwise specified, the data entries for Canada are all from Shanks 1058158421Swollman# & Pottenger. 10599908Swollman 1060169811Swollman# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1061169811Swollman# 2007-03-01): 1062158421Swollman# The British Columbia government announced yesterday that it will 1063158421Swollman# adjust daylight savings next year to align with changes in the 1064158421Swollman# U.S. and the rest of Canada.... 1065158421Swollman# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1066169811Swollman# ... 1067169811Swollman# Nova Scotia 1068163302Sru# Daylight saving time will be extended by four weeks starting in 2007.... 1069169811Swollman# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1070169811Swollman# 1071163302Sru# [For New Brunswick] the new legislation dictates that the time change is to 1072163302Sru# be done at 02:00 instead of 00:01. 1073163302Sru# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1074163302Sru# ... 1075163302Sru# Manitoba has traditionally changed the clock every fall at 03:00. 1076163302Sru# As of 2006, the transition is to take place one hour earlier at 02:00. 1077163302Sru# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1078163302Sru# ... 1079163302Sru# [Alberta, Ontario, Quebec] will follow US rules. 1080169811Swollman# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1081163302Sru# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1082169811Swollman# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1083163302Sru# ... 1084169811Swollman# P.E.I. will follow US rules.... 1085169811Swollman# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1086163302Sru# ... 1087169811Swollman# Province of Newfoundland and Labrador.... 1088169811Swollman# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1089163302Sru# ... 1090169811Swollman# Yukon 1091169811Swollman# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1092169811Swollman# ... 1093163302Sru# N.W.T. will follow US rules. Whoever maintains the government web site 1094163302Sru# does not seem to believe in bookmarks. To see the news release, click the 1095163302Sru# following link and search for "Daylight Savings Time Change". Press the 1096163302Sru# "Daylight Savings Time Change" link; it will fire off a popup using 1097163302Sru# JavaScript. 1098163302Sru# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1099169811Swollman# ... 1100169811Swollman# Nunavut 1101169811Swollman# An amendment to the Interpretation Act was registered on February 19/2007.... 1102169811Swollman# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1103163302Sru 1104273718Sedwin# From Paul Eggert (2014-10-18): 110567578Swollman# H. David Matthews and Mary Vincent's map 110667578Swollman# "It's about TIME", _Canadian Geographic_ (September-October 1998) 1107273718Sedwin# http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp 1108270728Spluknet# contains detailed boundaries for regions observing nonstandard 110967578Swollman# time and daylight saving time arrangements in Canada circa 1998. 111067578Swollman# 1111273718Sedwin# National Research Council Canada maintains info about time zones and DST. 1112273718Sedwin# http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html 1113273718Sedwin# http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 111467578Swollman# Its unofficial information is often taken from Matthews and Vincent. 11159908Swollman 1116163302Sru# From Paul Eggert (2006-06-27): 1117163302Sru# For now, assume all of DST-observing Canada will fall into line with the 1118163302Sru# new US DST rules, 1119163302Sru 1120233445Sedwin# From Chris Walton (2011-12-01) 1121233445Sedwin# In the first of Tammy Hardwick's articles 1122233445Sedwin# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1123233445Sedwin# she quotes the Friday November 1/1918 edition of the Creston Review. 1124233445Sedwin# The quote includes these two statements: 1125233445Sedwin# 'Sunday the CPR went back to the old system of time...' 1126233445Sedwin# '... The daylight saving scheme was dropped all over Canada at the same time,' 1127233445Sedwin# These statements refer to a transition from daylight time to standard time 1128233445Sedwin# that occurred nationally on Sunday October 27/1918. This transition was 1129233445Sedwin# also documented in the Saturday October 26/1918 edition of the Toronto Star. 1130233445Sedwin 1131233445Sedwin# In light of that evidence, we alter the date from the earlier believed 1132233445Sedwin# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1133233445Sedwin# than Thursday) in all Canadian rulesets. 1134233445Sedwin 11352742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 113617200SwollmanRule Canada 1918 only - Apr 14 2:00 1:00 D 1137233445SedwinRule Canada 1918 only - Oct 27 2:00 0 S 1138121098SwollmanRule Canada 1942 only - Feb 9 2:00 1:00 W # War 1139121098SwollmanRule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 114017200SwollmanRule Canada 1945 only - Sep 30 2:00 0 S 114117200SwollmanRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1142153761SwollmanRule Canada 1974 2006 - Oct lastSun 2:00 0 S 1143153761SwollmanRule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1144153761SwollmanRule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1145153761SwollmanRule Canada 2007 max - Nov Sun>=1 2:00 0 S 114617200Swollman 114717200Swollman 1148163302Sru# Newfoundland and Labrador 114917200Swollman 115067578Swollman# From Paul Eggert (2000-10-02): 115167578Swollman# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 115267578Swollman# but the only part of Labrador that follows the rules is the 115367578Swollman# southeast corner, including Port Hope Simpson and Mary's Harbour, 115467578Swollman# but excluding, say, Black Tickle. 115567578Swollman 115617200Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1157121098SwollmanRule StJohns 1917 only - Apr 8 2:00 1:00 D 11582742SwollmanRule StJohns 1917 only - Sep 17 2:00 0 S 1159158421Swollman# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 11602742SwollmanRule StJohns 1919 only - May 5 23:00 1:00 D 11612742SwollmanRule StJohns 1919 only - Aug 12 23:00 0 S 1162158421Swollman# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 11632742SwollmanRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 11642742SwollmanRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1165158421Swollman# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1166158421Swollman# Pottenger. 1167121098SwollmanRule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1168121098SwollmanRule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1169121098Swollman# Whitman gives the following transitions: 1170121098Swollman# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1171158421Swollman# but go with Shanks & Pottenger and assume they used Canadian rules. 11722742Swollman# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1173158421Swollman# Apr 30 - Sep 24; go with Shanks & Pottenger. 11742742SwollmanRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 11752742SwollmanRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 11762742SwollmanRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 11772742SwollmanRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 117867578SwollmanRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 117967578Swollman# From Paul Eggert (2000-10-02): 118067578Swollman# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 118167578Swollman# at 00:01 local time. For now, assume it started in 1987. 1182226289Sedwin 1183226289Sedwin# From Michael Pelley (2011-09-12): 1184226289Sedwin# We received today, Monday, September 12, 2011, notification that the 1185226289Sedwin# changes to the Newfoundland Standard Time Act have been proclaimed. 1186226289Sedwin# The change in the Act stipulates that the change from Daylight Savings 1187226289Sedwin# Time to Standard Time and from Standard Time to Daylight Savings Time 1188226289Sedwin# now occurs at 2:00AM. 1189226289Sedwin# ... 1190226289Sedwin# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1191226289Sedwin# ... 1192226289Sedwin# MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1193226289Sedwin# Office of the Chief Information Officer 1194226289Sedwin# Executive Council 1195226289Sedwin# Government of Newfoundland & Labrador 1196226289Sedwin 119767578SwollmanRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1198158421SwollmanRule StJohns 1987 2006 - Oct lastSun 0:01 0 S 119967578SwollmanRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1200158421SwollmanRule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1201226289SedwinRule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1202226289SedwinRule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1203158421Swollman# 12042742Swollman# St John's has an apostrophe, but Posix file names can't have apostrophes. 12052742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 12062742SwollmanZone America/St_Johns -3:30:52 - LMT 1884 1207121098Swollman -3:30:52 StJohns N%sT 1918 1208121098Swollman -3:30:52 Canada N%sT 1919 120920094Swollman -3:30:52 StJohns N%sT 1935 Mar 30 1210121098Swollman -3:30 StJohns N%sT 1942 May 11 1211121098Swollman -3:30 Canada N%sT 1946 1212226289Sedwin -3:30 StJohns N%sT 2011 Nov 1213226289Sedwin -3:30 Canada N%sT 12142742Swollman 121567578Swollman# most of east Labrador 121617200Swollman 1217257681Sedwin# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 121820094Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 121920094SwollmanZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1220121098Swollman -3:30:52 - NST 1918 1221121098Swollman -3:30:52 Canada N%sT 1919 122220094Swollman -3:30:52 - NST 1935 Mar 30 122320094Swollman -3:30 - NST 1936 1224121098Swollman -3:30 StJohns N%sT 1942 May 11 1225121098Swollman -3:30 Canada N%sT 1946 1226273718Sedwin -3:30 StJohns N%sT 1966 Mar 15 2:00 1227226289Sedwin -4:00 StJohns A%sT 2011 Nov 1228226289Sedwin -4:00 Canada A%sT 122920094Swollman 123020094Swollman 1231158421Swollman# west Labrador, Nova Scotia, Prince Edward I 123220094Swollman 1233158421Swollman# From Paul Eggert (2006-03-22): 1234158421Swollman# Shanks & Pottenger write that since 1970 most of this region has been like 1235158421Swollman# Halifax. Many locales did not observe peacetime DST until 1972; 123617200Swollman# Glace Bay, NS is the largest that we know of. 1237158421Swollman# Shanks & Pottenger also write that Liverpool, NS was the only town 1238158421Swollman# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1239158421Swollman# this is a typo. 124017200Swollman 12412742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1242158421SwollmanRule Halifax 1916 only - Apr 1 0:00 1:00 D 1243158421SwollmanRule Halifax 1916 only - Oct 1 0:00 0 S 1244158421SwollmanRule Halifax 1920 only - May 9 0:00 1:00 D 1245158421SwollmanRule Halifax 1920 only - Aug 29 0:00 0 S 1246158421SwollmanRule Halifax 1921 only - May 6 0:00 1:00 D 1247158421SwollmanRule Halifax 1921 1922 - Sep 5 0:00 0 S 1248158421SwollmanRule Halifax 1922 only - Apr 30 0:00 1:00 D 1249158421SwollmanRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1250158421SwollmanRule Halifax 1923 only - Sep 4 0:00 0 S 1251158421SwollmanRule Halifax 1924 only - Sep 15 0:00 0 S 1252158421SwollmanRule Halifax 1925 only - Sep 28 0:00 0 S 1253158421SwollmanRule Halifax 1926 only - May 16 0:00 1:00 D 1254158421SwollmanRule Halifax 1926 only - Sep 13 0:00 0 S 1255158421SwollmanRule Halifax 1927 only - May 1 0:00 1:00 D 1256158421SwollmanRule Halifax 1927 only - Sep 26 0:00 0 S 1257158421SwollmanRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1258158421SwollmanRule Halifax 1928 only - Sep 9 0:00 0 S 1259158421SwollmanRule Halifax 1929 only - Sep 3 0:00 0 S 1260158421SwollmanRule Halifax 1930 only - Sep 15 0:00 0 S 1261158421SwollmanRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1262158421SwollmanRule Halifax 1932 only - May 1 0:00 1:00 D 1263158421SwollmanRule Halifax 1933 only - Apr 30 0:00 1:00 D 1264158421SwollmanRule Halifax 1933 only - Oct 2 0:00 0 S 1265158421SwollmanRule Halifax 1934 only - May 20 0:00 1:00 D 1266158421SwollmanRule Halifax 1934 only - Sep 16 0:00 0 S 1267158421SwollmanRule Halifax 1935 only - Jun 2 0:00 1:00 D 1268158421SwollmanRule Halifax 1935 only - Sep 30 0:00 0 S 1269158421SwollmanRule Halifax 1936 only - Jun 1 0:00 1:00 D 1270158421SwollmanRule Halifax 1936 only - Sep 14 0:00 0 S 1271158421SwollmanRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1272158421SwollmanRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1273158421SwollmanRule Halifax 1939 only - May 28 0:00 1:00 D 1274158421SwollmanRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1275158421SwollmanRule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1276158421SwollmanRule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1277158421SwollmanRule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1278158421SwollmanRule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1279158421SwollmanRule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1280158421SwollmanRule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1281158421SwollmanRule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1282158421SwollmanRule Halifax 1962 1973 - Oct lastSun 2:00 0 S 12832742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 12842742SwollmanZone America/Halifax -4:14:24 - LMT 1902 Jun 15 1285121098Swollman -4:00 Halifax A%sT 1918 1286121098Swollman -4:00 Canada A%sT 1919 1287273718Sedwin -4:00 Halifax A%sT 1942 Feb 9 2:00s 1288121098Swollman -4:00 Canada A%sT 1946 1289121098Swollman -4:00 Halifax A%sT 1974 1290121098Swollman -4:00 Canada A%sT 129117200SwollmanZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 129217200Swollman -4:00 Canada A%sT 1953 129317200Swollman -4:00 Halifax A%sT 1954 129417200Swollman -4:00 - AST 1972 1295121098Swollman -4:00 Halifax A%sT 1974 1296121098Swollman -4:00 Canada A%sT 12972742Swollman 1298158421Swollman# New Brunswick 12998029Swollman 1300169811Swollman# From Paul Eggert (2007-01-31): 1301169811Swollman# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1302169811Swollman# says they changed at 00:01 through 2006, and 1303158421Swollman# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1304169811Swollman# clear that this was the case since at least 1993. 1305163302Sru# For now, assume it started in 1993. 1306158421Swollman 1307158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1308158421SwollmanRule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1309158421SwollmanRule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1310158421SwollmanRule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1311158421SwollmanRule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1312158421SwollmanRule Moncton 1939 only - May 27 1:00 1:00 D 1313158421SwollmanRule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1314158421SwollmanRule Moncton 1940 only - May 19 1:00 1:00 D 1315158421SwollmanRule Moncton 1941 only - May 4 1:00 1:00 D 1316158421SwollmanRule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1317158421SwollmanRule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1318158421SwollmanRule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1319158421SwollmanRule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1320158421SwollmanRule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1321158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1322158421SwollmanZone America/Moncton -4:19:08 - LMT 1883 Dec 9 1323158421Swollman -5:00 - EST 1902 Jun 15 1324158421Swollman -4:00 Canada A%sT 1933 1325158421Swollman -4:00 Moncton A%sT 1942 1326158421Swollman -4:00 Canada A%sT 1946 1327158421Swollman -4:00 Moncton A%sT 1973 1328158421Swollman -4:00 Canada A%sT 1993 1329163302Sru -4:00 Moncton A%sT 2007 1330163302Sru -4:00 Canada A%sT 1331158421Swollman 1332163302Sru# Quebec 133317200Swollman 1334257681Sedwin# From Paul Eggert (2013-08-30): 1335257681Sedwin# Since 1970 most of Quebec has been like Toronto. 1336257681Sedwin# However, because earlier versions of the tz database mistakenly relied on data 1337257681Sedwin# from Shanks & Pottenger saying that Quebec differed from Ontario after 1970, 1338257681Sedwin# a separate entry was created for most of Quebec. We're loath to lose 1339257681Sedwin# its pre-1970 info, even though the tz database is normally limited to 1340257681Sedwin# zones that differ after 1970, so keep this otherwise out-of-scope entry. 1341163302Sru 1342163302Sru# Matthews and Vincent (1998) also write that Quebec east of the -63 1343163302Sru# meridian is supposed to observe AST, but residents as far east as 1344163302Sru# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1345257681Sedwin# The Quebec department of justice writes in 1346270728Spluknet# "The situation in Minganie and Basse-C��te-Nord" 1347257681Sedwin# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm 1348257681Sedwin# that the coastal strip from just east of Natashquan to Blanc-Sablon 1349257681Sedwin# observes Atlantic standard time all year round. 1350257681Sedwin# http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en 1351163302Sru# says this common practice was codified into law as of 2007. 1352163302Sru# For lack of better info, guess this practice began around 1970, contra to 1353163302Sru# Shanks & Pottenger who have this region observing AST/ADT. 1354163302Sru 1355163302Sru# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1356163302SruRule Mont 1917 only - Mar 25 2:00 1:00 D 1357163302SruRule Mont 1917 only - Apr 24 0:00 0 S 1358163302SruRule Mont 1919 only - Mar 31 2:30 1:00 D 1359163302SruRule Mont 1919 only - Oct 25 2:30 0 S 1360163302SruRule Mont 1920 only - May 2 2:30 1:00 D 1361163302SruRule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 1362163302SruRule Mont 1921 only - May 1 2:00 1:00 D 1363163302SruRule Mont 1922 only - Apr 30 2:00 1:00 D 1364163302SruRule Mont 1924 only - May 17 2:00 1:00 D 1365163302SruRule Mont 1924 1926 - Sep lastSun 2:30 0 S 1366163302SruRule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1367273718SedwinRule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1368273718SedwinRule Mont 1927 1937 - Sep lastSat 24:00 0 S 1369273718SedwinRule Mont 1938 1940 - Apr lastSun 0:00 1:00 D 1370273718SedwinRule Mont 1938 1939 - Sep lastSun 0:00 0 S 1371163302SruRule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 1372163302SruRule Mont 1945 1948 - Sep lastSun 2:00 0 S 1373163302SruRule Mont 1949 1950 - Oct lastSun 2:00 0 S 1374163302SruRule Mont 1951 1956 - Sep lastSun 2:00 0 S 1375163302SruRule Mont 1957 1973 - Oct lastSun 2:00 0 S 1376163302Sru 1377163302Sru# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1378163302SruZone America/Blanc-Sablon -3:48:28 - LMT 1884 1379163302Sru -4:00 Canada A%sT 1970 1380163302Sru -4:00 - AST 1381163302SruZone America/Montreal -4:54:16 - LMT 1884 1382163302Sru -5:00 Mont E%sT 1918 1383163302Sru -5:00 Canada E%sT 1919 1384273718Sedwin -5:00 Mont E%sT 1942 Feb 9 2:00s 1385163302Sru -5:00 Canada E%sT 1946 1386163302Sru -5:00 Mont E%sT 1974 1387163302Sru -5:00 Canada E%sT 1388163302Sru 1389163302Sru# Ontario 1390163302Sru 1391163302Sru# From Paul Eggert (2006-07-09): 1392163302Sru# Shanks & Pottenger write that since 1970 most of Ontario has been like 1393163302Sru# Toronto. 139417200Swollman# Thunder Bay skipped DST in 1973. 139517200Swollman# Many smaller locales did not observe peacetime DST until 1974; 139617200Swollman# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 139717200Swollman# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 139817200Swollman 1399121098Swollman# From Mark Brader (2003-07-26): 1400121098Swollman# [According to the Toronto Star] Orillia, Ontario, adopted DST 1401121098Swollman# effective Saturday, 1912-06-22, 22:00; the article mentions that 1402121098Swollman# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1403121098Swollman# have already done so. In Orillia DST was to run until Saturday, 1404121098Swollman# 1912-08-31 (no time mentioned), but it was met with considerable 1405121098Swollman# hostility from certain segments of the public, and was revoked after 1406270728Spluknet# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but 1407121098Swollman# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1408121098Swollman# earlier in June). 1409121098Swollman# 1410121098Swollman# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1411121098Swollman 141243014Swollman# From Paul Eggert (1997-10-17): 1413121098Swollman# Mark Brader writes that an article in the 1997-10-14 Toronto Star 141443014Swollman# says that Atikokan, Ontario currently does not observe DST, 141543014Swollman# but will vote on 11-10 whether to use EST/EDT. 1416270728Spluknet# He also writes that the Ontario Time Act (1990, Chapter T.9) 1417273718Sedwin# http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html 141843014Swollman# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 141943014Swollman# Officially Atikokan is therefore on CST/CDT, and most likely this report 142043014Swollman# concerns a non-official time observed as a matter of local practice. 1421158421Swollman# 142267578Swollman# From Paul Eggert (2000-10-02): 142367578Swollman# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 142467578Swollman# New Osnaburgh observe CST all year, that Big Trout Lake observes 142567578Swollman# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 142667578Swollman# violation of the official Ontario rules. 1427163302Sru# 1428163302Sru# From Paul Eggert (2006-07-09): 1429163302Sru# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1430163302Sru# 2005-07-21 Chronicle-Journal, which said: 1431163302Sru# 1432163302Sru# The clocks in Atikokan stay set on standard time year-round. 1433163302Sru# This means they spend about half the time on central time and 1434163302Sru# the other half on eastern time. 1435163302Sru# 1436163302Sru# For the most part, the system works, Mayor Dennis Brown said. 1437163302Sru# 1438163302Sru# "The majority of businesses in Atikokan deal more with Eastern 1439163302Sru# Canada, but there are some that deal with Western Canada," he 1440163302Sru# said. "I don't see any changes happening here." 1441163302Sru# 1442163302Sru# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1443163302Sru# [New Osnaburgh] follow the same practice." 144467578Swollman 1445163302Sru# From Garry McKinnon (2006-07-14) via Chris Walton: 1446163302Sru# I chatted with a member of my board who has an outstanding memory 1447163302Sru# and a long history in Atikokan (and in the telecom industry) and he 1448163302Sru# can say for certain that Atikokan has been practicing the current 1449163302Sru# time keeping since 1952, at least. 1450163302Sru 1451163302Sru# From Paul Eggert (2006-07-17): 1452163302Sru# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1453163302Sru# ever since standard time was introduced, but the information from 1454163302Sru# McKinnon sounds more authoritative. For now, assume that Atikokan 1455163302Sru# switched to EST immediately after WWII era daylight saving time 1456163302Sru# ended. This matches the old (less-populous) America/Coral_Harbour 1457163302Sru# entry since our cutoff date of 1970, so we can move 1458163302Sru# America/Coral_Harbour to the 'backward' file. 1459163302Sru 1460210718Sedwin# From Mark Brader (2010-03-06): 1461210718Sedwin# 1462210718Sedwin# Currently the database has: 1463210718Sedwin# 1464210718Sedwin# # Ontario 1465210718Sedwin# 1466210718Sedwin# # From Paul Eggert (2006-07-09): 1467210718Sedwin# # Shanks & Pottenger write that since 1970 most of Ontario has been like 1468210718Sedwin# # Toronto. 1469210718Sedwin# # Thunder Bay skipped DST in 1973. 1470210718Sedwin# # Many smaller locales did not observe peacetime DST until 1974; 1471210718Sedwin# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1472210718Sedwin# 1473210718Sedwin# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1474210718Sedwin# right corner of page 1, it says that Toronto will return to standard 1475210718Sedwin# time at 2 am Sunday morning (which agrees with the database), and that: 1476210718Sedwin# 1477210718Sedwin# The one-hour setback will go into effect throughout most of Ontario, 1478210718Sedwin# except in areas like Windsor which remains on standard time all year. 1479210718Sedwin# 1480210718Sedwin# Windsor is, of course, a lot larger than Nipigon. 1481210718Sedwin# 1482210718Sedwin# I only came across this incidentally. I don't know if Windsor began 1483210718Sedwin# observing DST when Detroit did, or in 1974, or on some other date. 1484210718Sedwin# 1485210718Sedwin# By the way, the article continues by noting that: 1486210718Sedwin# 1487210718Sedwin# Some cities in the United States have pushed the deadline back 1488210718Sedwin# three weeks and will change over from daylight saving in October. 1489210718Sedwin 1490210718Sedwin# From Arthur David Olson (2010-07-17): 1491210718Sedwin# 1492210718Sedwin# "Standard Time and Time Zones in Canada" appeared in 1493210718Sedwin# The Journal of The Royal Astronomical Society of Canada, 1494210718Sedwin# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1495210718Sedwin# was available at 1496210718Sedwin# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1497210718Sedwin# 1498210718Sedwin# It includes the text below (starting on page 57): 1499210718Sedwin# 1500210718Sedwin# A list of the places in Canada using daylight saving time would 1501210718Sedwin# require yearly revision. From information kindly furnished by 1502210718Sedwin# the provincial governments and by the postmasters in many cities 1503210718Sedwin# and towns, it is found that the following places used daylight sav- 1504210718Sedwin# ing in 1930. The information for the province of Quebec is definite, 1505210718Sedwin# for the other provinces only approximate: 1506210718Sedwin# 1507273718Sedwin# Province Daylight saving time used 1508210718Sedwin# Prince Edward Island Not used. 1509210718Sedwin# Nova Scotia In Halifax only. 1510210718Sedwin# New Brunswick In St. John only. 1511210718Sedwin# Quebec In the following places: 1512273718Sedwin# Montreal Lachine 1513273718Sedwin# Quebec Mont-Royal 1514273718Sedwin# L��vis Iberville 1515273718Sedwin# St. Lambert Cap de la Madel��ine 1516273718Sedwin# Verdun Loretteville 1517273718Sedwin# Westmount Richmond 1518273718Sedwin# Outremont St. J��r��me 1519273718Sedwin# Longueuil Greenfield Park 1520273718Sedwin# Arvida Waterloo 1521273718Sedwin# Chambly-Canton Beaulieu 1522273718Sedwin# Melbourne La Tuque 1523273718Sedwin# St. Th��ophile Buckingham 1524210718Sedwin# Ontario Used generally in the cities and towns along 1525273718Sedwin# the southerly part of the province. Not 1526273718Sedwin# used in the northwesterly part. 1527210718Sedwin# Manitoba Not used. 1528210718Sedwin# Saskatchewan In Regina only. 1529210718Sedwin# Alberta Not used. 1530210718Sedwin# British Columbia Not used. 1531210718Sedwin# 1532210718Sedwin# With some exceptions, the use of daylight saving may be said to be limited 1533210718Sedwin# to those cities and towns lying between Quebec city and Windsor, Ont. 1534210718Sedwin 15352742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1536121098SwollmanRule Toronto 1919 only - Mar 30 23:30 1:00 D 1537121098SwollmanRule Toronto 1919 only - Oct 26 0:00 0 S 1538121098SwollmanRule Toronto 1920 only - May 2 2:00 1:00 D 1539121098SwollmanRule Toronto 1920 only - Sep 26 0:00 0 S 1540121098SwollmanRule Toronto 1921 only - May 15 2:00 1:00 D 1541121098SwollmanRule Toronto 1921 only - Sep 15 2:00 0 S 1542121098SwollmanRule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1543158421Swollman# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1544158421Swollman# was meant. 1545121098SwollmanRule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1546121098SwollmanRule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1547136638Swollman# The 1927-to-1939 rules can be expressed more simply as 1548136638Swollman# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1549136638Swollman# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1550136638Swollman# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1551136638Swollman# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1552136638Swollman# The rules below avoid use of Sun>=25 1553136638Swollman# (which pre-2004 versions of zic cannot handle). 1554136638SwollmanRule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1555136638SwollmanRule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1556136638SwollmanRule Toronto 1932 only - May 1 2:00 1:00 D 1557136638SwollmanRule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1558136638SwollmanRule Toronto 1933 only - Oct 1 2:00 0 S 1559136638SwollmanRule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1560121098SwollmanRule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1561121098SwollmanRule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1562121098SwollmanRule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1563121098SwollmanRule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1564121098SwollmanRule Toronto 1949 only - Nov lastSun 0:00 0 S 1565121098SwollmanRule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1566121098SwollmanRule Toronto 1950 only - Nov lastSun 2:00 0 S 1567121098SwollmanRule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1568158421Swollman# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1569163302Sru# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1570163302Sru# is wrong, and that he had confirmed it by checking the 1971-10-30 1571163302Sru# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1572121098SwollmanRule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1573121098Swollman 1574121098Swollman# From Paul Eggert (2003-07-27): 1575121098Swollman# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1576121098Swollman# Port Arthur, Ontario, the principle of the Bill has been in 1577121098Swollman# operation for the past three years, and in the City of Moose Jaw, 1578136638Swollman# Saskatchewan, for one year." 1579121098Swollman 1580136638Swollman# From David Bryan via Tory Tronrud, Director/Curator, 1581136638Swollman# Thunder Bay Museum (2003-11-12): 1582136638Swollman# There is some suggestion, however, that, by-law or not, daylight 1583136638Swollman# savings time was being practiced in Fort William and Port Arthur 1584136638Swollman# before 1909.... [I]n 1910, the line between the Eastern and Central 1585136638Swollman# Time Zones was permanently moved about two hundred miles west to 1586136638Swollman# include the Thunder Bay area.... When Canada adopted daylight 1587136638Swollman# savings time in 1916, Fort William and Port Arthur, having done so 1588136638Swollman# already, did not change their clocks.... During the Second World 1589136638Swollman# War,... [t]he cities agreed to implement DST during the summer 1590136638Swollman# months for the remainder of the war years. 1591136638Swollman 15922742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1593121098SwollmanZone America/Toronto -5:17:32 - LMT 1895 1594121098Swollman -5:00 Canada E%sT 1919 1595273718Sedwin -5:00 Toronto E%sT 1942 Feb 9 2:00s 1596121098Swollman -5:00 Canada E%sT 1946 1597121098Swollman -5:00 Toronto E%sT 1974 1598121098Swollman -5:00 Canada E%sT 159917200SwollmanZone America/Thunder_Bay -5:57:00 - LMT 1895 1600136638Swollman -6:00 - CST 1910 1601136638Swollman -5:00 - EST 1942 160217200Swollman -5:00 Canada E%sT 1970 1603257681Sedwin -5:00 Toronto E%sT 1973 160417200Swollman -5:00 - EST 1974 160517200Swollman -5:00 Canada E%sT 160617200SwollmanZone America/Nipigon -5:53:04 - LMT 1895 1607121098Swollman -5:00 Canada E%sT 1940 Sep 29 1608273718Sedwin -5:00 1:00 EDT 1942 Feb 9 2:00s 160917200Swollman -5:00 Canada E%sT 1610163302SruZone America/Rainy_River -6:18:16 - LMT 1895 1611121098Swollman -6:00 Canada C%sT 1940 Sep 29 1612273718Sedwin -6:00 1:00 CDT 1942 Feb 9 2:00s 161317200Swollman -6:00 Canada C%sT 1614163302SruZone America/Atikokan -6:06:28 - LMT 1895 1615163302Sru -6:00 Canada C%sT 1940 Sep 29 1616273718Sedwin -6:00 1:00 CDT 1942 Feb 9 2:00s 1617273718Sedwin -6:00 Canada C%sT 1945 Sep 30 2:00 1618163302Sru -5:00 - EST 16192742Swollman 16208029Swollman 162117200Swollman# Manitoba 162219878Swollman 1623158421Swollman# From Rob Douglas (2006-04-06): 1624158421Swollman# the old Manitoba Time Act - as amended by Bill 2, assented to 1625158421Swollman# March 27, 1987 ... said ... 1626158421Swollman# "between two o'clock Central Standard Time in the morning of 1627158421Swollman# the first Sunday of April of each year and two o'clock Central 1628158421Swollman# Standard Time in the morning of the last Sunday of October next 1629158421Swollman# following, one hour in advance of Central Standard Time."... 1630270728Spluknet# I believe that the English legislation [of the old time act] had 1631158421Swollman# been assented to (March 22, 1967).... 1632158421Swollman# Also, as far as I can tell, there was no order-in-council varying 1633158421Swollman# the time of Daylight Saving Time for 2005 and so the provisions of 1634158421Swollman# the 1987 version would apply - the changeover was at 2:00 Central 1635158421Swollman# Standard Time (i.e. not until 3:00 Central Daylight Time). 1636158421Swollman 1637158421Swollman# From Paul Eggert (2006-04-10): 1638158421Swollman# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1639158421Swollman# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1640158421Swollman# it was also 02:00s in 1966. 1641158421Swollman 16422742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16432742SwollmanRule Winn 1916 only - Apr 23 0:00 1:00 D 16442742SwollmanRule Winn 1916 only - Sep 17 0:00 0 S 16452742SwollmanRule Winn 1918 only - Apr 14 2:00 1:00 D 1646233445SedwinRule Winn 1918 only - Oct 27 2:00 0 S 16472742SwollmanRule Winn 1937 only - May 16 2:00 1:00 D 164814343SwollmanRule Winn 1937 only - Sep 26 2:00 0 S 1649121098SwollmanRule Winn 1942 only - Feb 9 2:00 1:00 W # War 1650121098SwollmanRule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 16512742SwollmanRule Winn 1945 only - Sep lastSun 2:00 0 S 16522742SwollmanRule Winn 1946 only - May 12 2:00 1:00 D 16532742SwollmanRule Winn 1946 only - Oct 13 2:00 0 S 16542742SwollmanRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 165514343SwollmanRule Winn 1947 1949 - Sep lastSun 2:00 0 S 165614343SwollmanRule Winn 1950 only - May 1 2:00 1:00 D 165714343SwollmanRule Winn 1950 only - Sep 30 2:00 0 S 165814343SwollmanRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 165914343SwollmanRule Winn 1951 1958 - Sep lastSun 2:00 0 S 16602742SwollmanRule Winn 1959 only - Oct lastSun 2:00 0 S 16612742SwollmanRule Winn 1960 only - Sep lastSun 2:00 0 S 16622742SwollmanRule Winn 1963 only - Apr lastSun 2:00 1:00 D 166314343SwollmanRule Winn 1963 only - Sep 22 2:00 0 S 1664158421SwollmanRule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1665158421SwollmanRule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1666158421SwollmanRule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 16672742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16682742SwollmanZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1669158421Swollman -6:00 Winn C%sT 2006 1670158421Swollman -6:00 Canada C%sT 16712742Swollman 16728029Swollman 167317200Swollman# Saskatchewan 167417200Swollman 1675121098Swollman# From Mark Brader (2003-07-26): 1676121098Swollman# The first actual adoption of DST in Canada was at the municipal 1677121098Swollman# level. As the [Toronto] Star put it (1912-06-07), "While people 1678121098Swollman# elsewhere have long been talking of legislation to save daylight, 1679121098Swollman# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1680121098Swollman# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1681121098Swollman# presumably late evening, as below), and would run until "the end of 1682121098Swollman# the summer". The discrepancy between municipal time and railroad 1683121098Swollman# time was noted. 1684121098Swollman 1685121098Swollman# From Paul Eggert (2003-07-27): 1686121098Swollman# Willett (1914-03) notes that DST "has been in operation ... in the 1687121098Swollman# City of Moose Jaw, Saskatchewan, for one year." 1688121098Swollman 1689158421Swollman# From Paul Eggert (2006-03-22): 1690158421Swollman# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 169117200Swollman# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 169217200Swollman# Other western towns (e.g. Lloydminster) are like Edmonton. 169367578Swollman# Matthews and Vincent (1998) write that Denare Beach and Creighton 169467578Swollman# are like Winnipeg, in violation of Saskatchewan law. 169517200Swollman 1696149514Swollman# From W. Jones (1992-11-06): 169717200Swollman# The. . .below is based on information I got from our law library, the 169817200Swollman# provincial archives, and the provincial Community Services department. 169917200Swollman# A precise history would require digging through newspaper archives, and 170017200Swollman# since you didn't say what you wanted, I didn't bother. 170117200Swollman# 170217200Swollman# Saskatchewan is split by a time zone meridian (105W) and over the years 170317200Swollman# the boundary became pretty ragged as communities near it reevaluated 170417200Swollman# their affiliations in one direction or the other. In 1965 a provincial 170517200Swollman# referendum favoured legislating common time practices. 170617200Swollman# 170717200Swollman# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 170817200Swollman# Saskatchewan 1978) was proclaimed, and established that the eastern 170917200Swollman# part of Saskatchewan would use CST year round, that districts in 171017200Swollman# northwest Saskatchewan would by default follow CST but could opt to 171117200Swollman# follow Mountain Time rules (thus 1 hour difference in the winter and 171217200Swollman# zero in the summer), and that districts in southwest Saskatchewan would 171317200Swollman# by default follow MT but could opt to follow CST. 171417200Swollman# 171517200Swollman# It took a few years for the dust to settle (I know one story of a town 171617200Swollman# on one time zone having its school in another, such that a mom had to 171717200Swollman# serve her family lunch in two shifts), but presently it seems that only 171817200Swollman# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 171917200Swollman# rules any more; all other districts appear to have used CST year round 172017200Swollman# since sometime in the 1960s. 172117200Swollman 1722163302Sru# From Chris Walton (2006-06-26): 1723163302Sru# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1724163302Sru# long and rather painful to read. 1725163302Sru# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1726163302Sru 17272742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17282742SwollmanRule Regina 1918 only - Apr 14 2:00 1:00 D 1729233445SedwinRule Regina 1918 only - Oct 27 2:00 0 S 17302742SwollmanRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 17312742SwollmanRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 17322742SwollmanRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 17332742SwollmanRule Regina 1937 only - Oct Sun>=8 0:00 0 S 17342742SwollmanRule Regina 1938 only - Oct Sun>=1 0:00 0 S 17352742SwollmanRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1736121098SwollmanRule Regina 1942 only - Feb 9 2:00 1:00 W # War 1737121098SwollmanRule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 17382742SwollmanRule Regina 1945 only - Sep lastSun 2:00 0 S 173917200SwollmanRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 174017200SwollmanRule Regina 1946 only - Oct Sun>=8 2:00 0 S 1741121098SwollmanRule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1742121098SwollmanRule Regina 1947 1957 - Sep lastSun 2:00 0 S 1743121098SwollmanRule Regina 1959 only - Apr lastSun 2:00 1:00 D 174417200SwollmanRule Regina 1959 only - Oct lastSun 2:00 0 S 174517200Swollman# 174617200SwollmanRule Swift 1957 only - Apr lastSun 2:00 1:00 D 174717200SwollmanRule Swift 1957 only - Oct lastSun 2:00 0 S 174817200SwollmanRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 174917200SwollmanRule Swift 1959 only - Oct lastSun 2:00 0 S 175017200SwollmanRule Swift 1960 1961 - Sep lastSun 2:00 0 S 17512742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 175217200SwollmanZone America/Regina -6:58:36 - LMT 1905 Sep 1753273718Sedwin -7:00 Regina M%sT 1960 Apr lastSun 2:00 17542742Swollman -6:00 - CST 175517200SwollmanZone America/Swift_Current -7:11:20 - LMT 1905 Sep 1756273718Sedwin -7:00 Canada M%sT 1946 Apr lastSun 2:00 175717200Swollman -7:00 Regina M%sT 1950 1758273718Sedwin -7:00 Swift M%sT 1972 Apr lastSun 2:00 175917200Swollman -6:00 - CST 17602742Swollman 17618029Swollman 176217200Swollman# Alberta 176317200Swollman 17642742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17652742SwollmanRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1766233445SedwinRule Edm 1918 only - Oct 27 2:00 0 S 17672742SwollmanRule Edm 1919 only - May 27 2:00 0 S 17682742SwollmanRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 17692742SwollmanRule Edm 1920 only - Oct lastSun 2:00 0 S 17702742SwollmanRule Edm 1921 1923 - Sep lastSun 2:00 0 S 1771121098SwollmanRule Edm 1942 only - Feb 9 2:00 1:00 W # War 1772121098SwollmanRule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 17732742SwollmanRule Edm 1945 only - Sep lastSun 2:00 0 S 17742742SwollmanRule Edm 1947 only - Apr lastSun 2:00 1:00 D 17752742SwollmanRule Edm 1947 only - Sep lastSun 2:00 0 S 17762742SwollmanRule Edm 1967 only - Apr lastSun 2:00 1:00 D 17772742SwollmanRule Edm 1967 only - Oct lastSun 2:00 0 S 17782742SwollmanRule Edm 1969 only - Apr lastSun 2:00 1:00 D 17792742SwollmanRule Edm 1969 only - Oct lastSun 2:00 0 S 17802742SwollmanRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1781158421SwollmanRule Edm 1972 2006 - Oct lastSun 2:00 0 S 17822742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17832742SwollmanZone America/Edmonton -7:33:52 - LMT 1906 Sep 1784158421Swollman -7:00 Edm M%sT 1987 1785158421Swollman -7:00 Canada M%sT 17862742Swollman 17878029Swollman 178817200Swollman# British Columbia 178917200Swollman 1790158421Swollman# From Paul Eggert (2006-03-22): 1791158421Swollman# Shanks & Pottenger write that since 1970 most of this region has 1792158421Swollman# been like Vancouver. 179358787Sru# Dawson Creek uses MST. Much of east BC is like Edmonton. 179467578Swollman# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 179517200Swollman 1796233445Sedwin# It seems though that (re: Creston) is not entirely correct: 1797233445Sedwin 1798233445Sedwin# From Chris Walton (2011-12-01): 1799233445Sedwin# There are two areas within the Canadian province of British Columbia 1800233445Sedwin# that do not currently observe daylight saving: 1801233445Sedwin# a) The Creston Valley (includes the town of Creston and surrounding area) 1802233445Sedwin# b) The eastern half of the Peace River Regional District 1803233445Sedwin# (includes the cities of Dawson Creek and Fort St. John) 1804233445Sedwin 1805233445Sedwin# Earlier this year I stumbled across a detailed article about the time 1806233445Sedwin# keeping history of Creston; it was written by Tammy Hardwick who is the 1807233445Sedwin# manager of the Creston & District Museum. The article was written in May 2009. 1808233445Sedwin# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1809233445Sedwin# According to the article, Creston has not changed its clocks since June 1918. 1810233445Sedwin# i.e. Creston has been stuck on UTC-7 for 93 years. 1811233445Sedwin# Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1812233445Sedwin 1813233445Sedwin# Unfortunately the exact date for the time change in June 1918 remains 1814233445Sedwin# unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1815233445Sedwin# ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1816273718Sedwin# as plausible as any other date (in June). She also said that after writing 1817273718Sedwin# the article she had discovered another time change in 1916; this is the 1818273718Sedwin# subject of another article which she wrote in October 2010. 1819233445Sedwin# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1820233445Sedwin 1821233445Sedwin# Here is a summary of the three clock change events in Creston's history: 1822233445Sedwin# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1823233445Sedwin# Exact date unknown 1824240457Sedwin# 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1825273718Sedwin# Exact date in October unknown; Sunday October 1 is a reasonable guess. 1826233445Sedwin# 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1827233445Sedwin# Exact date in June unknown; Sunday June 2 is a reasonable guess. 1828233445Sedwin# note#1: 1829233445Sedwin# On Oct 27/1918 when daylight saving ended in the rest of Canada, 1830233445Sedwin# Creston did not change its clocks. 1831233445Sedwin# note#2: 1832233445Sedwin# During WWII when the Federal Government legislated a mandatory clock change, 1833233445Sedwin# Creston did not oblige. 1834233445Sedwin# note#3: 1835233445Sedwin# There is no guarantee that Creston will remain on Mountain Standard Time 1836233445Sedwin# (UTC-7) forever. 1837233445Sedwin# The subject was debated at least once this year by the town Council. 1838233445Sedwin# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1839233445Sedwin 1840233445Sedwin# During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1841233445Sedwin# In Creston, that was handled by shifting the area to PST (-8:00) then applying 1842233445Sedwin# summer time to cause the offset to be -7:00, the same as it had been before 1843233445Sedwin# the change. It can be argued that the timezone abbreviation during this 1844233445Sedwin# period should be PDT rather than MST, but that doesn't seem important enough 1845233445Sedwin# (to anyone) to further complicate the rules. 1846233445Sedwin 1847233445Sedwin# The transition dates (and times) are guesses. 1848233445Sedwin 18492742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 18502742SwollmanRule Vanc 1918 only - Apr 14 2:00 1:00 D 1851233445SedwinRule Vanc 1918 only - Oct 27 2:00 0 S 1852121098SwollmanRule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1853121098SwollmanRule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 18542742SwollmanRule Vanc 1945 only - Sep 30 2:00 0 S 18552742SwollmanRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 18562742SwollmanRule Vanc 1946 only - Oct 13 2:00 0 S 18572742SwollmanRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1858158421SwollmanRule Vanc 1962 2006 - Oct lastSun 2:00 0 S 18592742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18602742SwollmanZone America/Vancouver -8:12:28 - LMT 1884 1861158421Swollman -8:00 Vanc P%sT 1987 1862158421Swollman -8:00 Canada P%sT 186317200SwollmanZone America/Dawson_Creek -8:00:56 - LMT 1884 186417200Swollman -8:00 Canada P%sT 1947 1865273718Sedwin -8:00 Vanc P%sT 1972 Aug 30 2:00 186617200Swollman -7:00 - MST 1867233445SedwinZone America/Creston -7:46:04 - LMT 1884 1868233445Sedwin -7:00 - MST 1916 Oct 1 1869233445Sedwin -8:00 - PST 1918 Jun 2 1870233445Sedwin -7:00 - MST 18712742Swollman 187258787Sru# Northwest Territories, Nunavut, Yukon 187317200Swollman 1874158421Swollman# From Paul Eggert (2006-03-22): 187517200Swollman# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1876149514Swollman# Mathew Englander (1996-10-07) gives the following refs: 187720094Swollman# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 187820094Swollman# c. 7 defines Yukon standard time as UTC-9. This is still valid; 187920094Swollman# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 188020094Swollman# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 188120094Swollman# * O.I.C. 1980/02 established DST. 188220094Swollman# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1883158421Swollman# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1884158421Swollman# with Englander. 1885163302Sru# From Chris Walton (2006-06-26): 1886163302Sru# Here is a link to the old daylight saving portion of the interpretation 1887163302Sru# act which was last updated in 1987: 1888163302Sru# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf 188917200Swollman 189058787Sru# From Rives McDow (1999-09-04): 189158787Sru# Nunavut ... moved ... to incorporate the whole territory into one time zone. 189258787Sru# Nunavut moves to single time zone Oct. 31 1893273718Sedwin# http://www.nunatsiaq.com/nunavut/nvt90903_13.html 189458787Sru# 189558787Sru# From Antoine Leca (1999-09-06): 189658787Sru# We then need to create a new timezone for the Kitikmeot region of Nunavut 189758787Sru# to differentiate it from the Yellowknife region. 189858787Sru 189958787Sru# From Paul Eggert (1999-09-20): 190058787Sru# Basic Facts: The New Territory 1901273718Sedwin# http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html 1902270728Spluknet# (1999) reports that Pangnirtung operates on eastern time, 190358787Sru# and that Coral Harbour does not observe DST. We don't know when 190486222Swollman# Pangnirtung switched to eastern time; we'll guess 1995. 190558787Sru 190658787Sru# From Rives McDow (1999-11-08): 190758787Sru# On October 31, when the rest of Nunavut went to Central time, 190858787Sru# Pangnirtung wobbled. Here is the result of their wobble: 190958787Sru# 191058787Sru# The following businesses and organizations in Pangnirtung use Central Time: 191158787Sru# 191258787Sru# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 191358787Sru# Eastern Arctic National Parks, A & D Specialist 191458787Sru# 191558787Sru# The following businesses and organizations in Pangnirtung use Eastern Time: 191658787Sru# 191758787Sru# Hamlet office, All other businesses, Both schools, Airport operator 191858787Sru# 191958787Sru# This has made for an interesting situation there, which warranted the news. 192058787Sru# No one there that I spoke with seems concerned, or has plans to 192158787Sru# change the local methods of keeping time, as it evidently does not 192258787Sru# really interfere with any activities or make things difficult locally. 192358787Sru# They plan to celebrate New Year's turn-over twice, one hour apart, 192458787Sru# so it appears that the situation will last at least that long. 192558787Sru# The Nunavut Intergovernmental Affairs hopes that they will "come to 192658787Sru# their senses", but the locals evidently don't see any problem with 192758787Sru# the current state of affairs. 192858787Sru 192958787Sru# From Michaela Rodrigue, writing in the 1930273718Sedwin# Nunatsiaq News (1999-11-19): 1931273718Sedwin# http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html 193258787Sru# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 193358787Sru# central - or Nunavut time - for government offices, and eastern time 193458787Sru# for municipal offices and schools.... Igloolik [was similar but then] 193558787Sru# made the switch to central time on Saturday, Nov. 6. 193658787Sru 193767578Swollman# From Paul Eggert (2000-10-02): 193867578Swollman# Matthews and Vincent (1998) say the following, but we lack histories 193967578Swollman# for these potential new Zones. 194075267Swollman# 194167578Swollman# The Canadian Forces station at Alert uses Eastern Time while the 194267578Swollman# handful of residents at the Eureka weather station [in the Central 194367578Swollman# zone] skip daylight savings. Baffin Island, which is crossed by the 194467578Swollman# Central, Eastern and Atlantic Time zones only uses Eastern Time. 194567578Swollman# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 194667578Swollman# Central Time and Southampton Island [in the Central zone] is not 194767578Swollman# required to use daylight savings. 194867578Swollman 1949270728Spluknet# From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html> 1950270728Spluknet# Nunavut now has two time zones (2000-11-10): 195175267Swollman# The Nunavut government would allow its employees in Kugluktuk and 195275267Swollman# Cambridge Bay to operate on central time year-round, putting them 195375267Swollman# one hour behind the rest of Nunavut for six months during the winter. 195475267Swollman# At the end of October the two communities had rebelled against 195575267Swollman# Nunavut's unified time zone, refusing to shift to eastern time with 195675267Swollman# the rest of the territory for the winter. Cambridge Bay remained on 195775267Swollman# central time, while Kugluktuk, even farther west, reverted to 195875267Swollman# mountain time, which they had used before the advent of Nunavut's 195975267Swollman# unified time zone in 1999. 196075267Swollman# 196175267Swollman# From Rives McDow (2001-01-20), quoting the Nunavut government: 196275267Swollman# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 196375267Swollman 196475267Swollman# From Paul Eggert (2000-12-04): 196575267Swollman# Let's just keep track of the official times for now. 196675267Swollman 196775267Swollman# From Rives McDow (2001-03-07): 196875267Swollman# The premier of Nunavut has issued a ministerial statement advising 196975267Swollman# that effective 2001-04-01, the territory of Nunavut will revert 197075267Swollman# back to three time zones (mountain, central, and eastern). Of the 197175267Swollman# cities in Nunavut, Coral Harbor is the only one that I know of that 197275267Swollman# has said it will not observe dst, staying on EST year round. I'm 197375267Swollman# checking for more info, and will get back to you if I come up with 197475267Swollman# more. 197575267Swollman# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 197675267Swollman 1977149514Swollman# From Gwillim Law (2005-05-21): 1978273718Sedwin# According to ... 1979149514Swollman# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 1980149514Swollman# (from a 1998 Canadian Geographic article), the de facto and de jure time 1981149514Swollman# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 1982149514Swollman# round. Using Google, it's easy to find other websites that confirm this. 1983149514Swollman# I wasn't able to find how far back this time regimen goes, but since it 1984149514Swollman# predates the creation of Nunavut, it probably goes back many years.... 1985149514Swollman# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 1986149514Swollman# 1987273718Sedwin# From Paul Eggert (2014-10-17): 1988149514Swollman# For lack of better information, assume that Southampton Island observed 1989273718Sedwin# daylight saving only during wartime. Gwillim Law's email also 1990273718Sedwin# mentioned maps now maintained by National Research Council Canada; 1991273718Sedwin# see above for an up-to-date link. 1992149514Swollman 1993169811Swollman# From Chris Walton (2007-03-01): 1994169811Swollman# ... the community of Resolute (located on Cornwallis Island in 1995169811Swollman# Nunavut) moved from Central Time to Eastern Time last November. 1996169811Swollman# Basically the community did not change its clocks at the end of 1997169811Swollman# daylight saving.... 1998169811Swollman# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 1999163302Sru 2000226289Sedwin# From Chris Walton (2011-03-21): 2001226289Sedwin# Back in 2007 I initiated the creation of a new "zone file" for Resolute 2002226289Sedwin# Bay. Resolute Bay is a small community located about 900km north of 2003226289Sedwin# the Arctic Circle. The zone file was required because Resolute Bay had 2004226289Sedwin# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2005169811Swollman# 2006226289Sedwin# According to new information which I received last week, Resolute Bay 2007226289Sedwin# went back to using UTC-6 in the winter of 2007-2008... 2008226289Sedwin# 2009226289Sedwin# On March 11/2007 most of Canada went onto daylight saving. On March 2010226289Sedwin# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2011226289Sedwin# talked to somebody that was both knowledgeable and helpful. I was able 2012226289Sedwin# to confirm that Resolute Bay was still operating on UTC-5. It was 2013226289Sedwin# explained to me that Resolute Bay had been on the Eastern Time zone 2014226289Sedwin# (EST) in the winter, and was now back on the Central Time zone (CDT). 2015226289Sedwin# i.e. the time zone had changed twice in the last year but the clocks 2016226289Sedwin# had not moved. The residents had to know which time zone they were in 2017226289Sedwin# so they could follow the correct TV schedule... 2018226289Sedwin# 2019226289Sedwin# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2020226289Sedwin# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2021226289Sedwin# of the phone call, I decided to seek out an alternate source of 2022226289Sedwin# information. I found an e-mail address for somebody by the name of 2023226289Sedwin# Stephanie Adams whose job was listed as "Inns North Support Officer for 2024226289Sedwin# Arctic Co-operatives." I was under the impression that Stephanie lived 2025226289Sedwin# and worked in Resolute Bay... 2026226289Sedwin# 2027226289Sedwin# On March 14/2011 I phoned the hamlet office again. I was told that 2028226289Sedwin# Resolute Bay had been using Central Standard Time over the winter of 2029226289Sedwin# 2010-2011 and that the clocks had therefore been moved one hour ahead 2030226289Sedwin# on March 13/2011. The person I talked to was aware that Resolute Bay 2031226289Sedwin# had previously experimented with Eastern Standard Time but he could not 2032226289Sedwin# tell me when the practice had stopped. 2033226289Sedwin# 2034226289Sedwin# On March 17/2011 I searched the Web to find an e-mail address of 2035226289Sedwin# somebody that might be able to tell me exactly when Resolute Bay went 2036226289Sedwin# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2037226289Sedwin# used to be the mayor of Resolute Bay and he apparently owns half the 2038226289Sedwin# businesses including "South Camp Inn." This website has some info on 2039226289Sedwin# Aziz: 2040226289Sedwin# http://www.uphere.ca/node/493 2041226289Sedwin# 2042226289Sedwin# I sent Aziz an e-mail asking when Resolute Bay had stopped using 2043226289Sedwin# Eastern Standard Time. 2044226289Sedwin# 2045226289Sedwin# Aziz responded quickly with this: "hi, The time was not changed for the 2046226289Sedwin# 1 year only, the following year, the community went back to the old way 2047226289Sedwin# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2048226289Sedwin# the winter Zulu plus 6 hrs" 2049226289Sedwin# 2050226289Sedwin# This of course conflicted with everything I had ascertained in November 2008. 2051226289Sedwin# 2052226289Sedwin# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2053226289Sedwin# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2054226289Sedwin# may want to check with the weather office in Resolute Bay or do a 2055226289Sedwin# search on the weather through Env. Canada. web site" 2056226289Sedwin# 2057226289Sedwin# If I had realized the Stephanie did not live in Resolute Bay I would 2058226289Sedwin# never have contacted her. I now believe that all the information I 2059226289Sedwin# obtained in November 2008 should be ignored... 2060226289Sedwin# I apologize for reporting incorrect information in 2008. 2061169811Swollman 20622742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 206317200SwollmanRule NT_YK 1918 only - Apr 14 2:00 1:00 D 206417200SwollmanRule NT_YK 1918 only - Oct 27 2:00 0 S 206517200SwollmanRule NT_YK 1919 only - May 25 2:00 1:00 D 206617200SwollmanRule NT_YK 1919 only - Nov 1 0:00 0 S 2067121098SwollmanRule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2068121098SwollmanRule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 206917200SwollmanRule NT_YK 1945 only - Sep 30 2:00 0 S 207017200SwollmanRule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 207117200SwollmanRule NT_YK 1965 only - Oct lastSun 2:00 0 S 207217200SwollmanRule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2073158421SwollmanRule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2074158421SwollmanRule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 20752742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2076169811Swollman# aka Panniqtuuq 2077169811SwollmanZone America/Pangnirtung 0 - zzz 1921 # trading post est. 2078273718Sedwin -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2079273718Sedwin -5:00 Canada E%sT 1999 Oct 31 2:00 2080273718Sedwin -6:00 Canada C%sT 2000 Oct 29 2:00 208175267Swollman -5:00 Canada E%sT 2082169811Swollman# formerly Frobisher Bay 2083169811SwollmanZone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 2084273718Sedwin -5:00 NT_YK E%sT 1999 Oct 31 2:00 2085273718Sedwin -6:00 Canada C%sT 2000 Oct 29 2:00 208675267Swollman -5:00 Canada E%sT 2087169811Swollman# aka Qausuittuq 2088169811SwollmanZone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 2089273718Sedwin -6:00 NT_YK C%sT 2000 Oct 29 2:00 2090273718Sedwin -5:00 - EST 2001 Apr 1 3:00 2091273718Sedwin -6:00 Canada C%sT 2006 Oct 29 2:00 2092273718Sedwin -5:00 - EST 2007 Mar 11 3:00 2093226289Sedwin -6:00 Canada C%sT 2094169811Swollman# aka Kangiqiniq 2095169811SwollmanZone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 2096273718Sedwin -6:00 NT_YK C%sT 2000 Oct 29 2:00 2097273718Sedwin -5:00 - EST 2001 Apr 1 3:00 209858787Sru -6:00 Canada C%sT 2099169811Swollman# aka Iqaluktuuttiaq 2100169811SwollmanZone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 2101273718Sedwin -7:00 NT_YK M%sT 1999 Oct 31 2:00 2102273718Sedwin -6:00 Canada C%sT 2000 Oct 29 2:00 2103273718Sedwin -5:00 - EST 2000 Nov 5 0:00 2104273718Sedwin -6:00 - CST 2001 Apr 1 3:00 210575267Swollman -7:00 Canada M%sT 2106169811SwollmanZone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 2107158421Swollman -7:00 NT_YK M%sT 1980 2108158421Swollman -7:00 Canada M%sT 2109169811SwollmanZone America/Inuvik 0 - zzz 1953 # Inuvik founded 2110273718Sedwin -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2111158421Swollman -7:00 NT_YK M%sT 1980 2112158421Swollman -7:00 Canada M%sT 21132742SwollmanZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2114273718Sedwin -9:00 NT_YK Y%sT 1966 Jul 1 2:00 2115158421Swollman -8:00 NT_YK P%sT 1980 2116158421Swollman -8:00 Canada P%sT 211717200SwollmanZone America/Dawson -9:17:40 - LMT 1900 Aug 20 2118273718Sedwin -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2119158421Swollman -8:00 NT_YK P%sT 1980 2120158421Swollman -8:00 Canada P%sT 21212742Swollman 21228029Swollman 21232742Swollman############################################################################### 21242742Swollman 21252742Swollman# Mexico 21262742Swollman 2127279706Sedwin# From Paul Eggert (2014-12-07): 212875267Swollman# The Investigation and Analysis Service of the 212975267Swollman# Mexican Library of Congress (MLoC) has published a 213075267Swollman# history of Mexican local time (in Spanish) 2131279706Sedwin# http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm 21322742Swollman# 2133158421Swollman# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 213475267Swollman# (In all cases we go with the MLoC.) 2135158421Swollman# S&P report that Baja was at -8:00 in 1922/1923. 2136158421Swollman# S&P say the 1930 transition in Baja was 1930-11-16. 2137158421Swollman# S&P report no DST during summer 1931. 2138158421Swollman# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 21392742Swollman 214075267Swollman# From Gwillim Law (2001-02-20): 214175267Swollman# There are some other discrepancies between the Decrees page and the 214275267Swollman# tz database. I think they can best be explained by supposing that 214375267Swollman# the researchers who prepared the Decrees page failed to find some of 214475267Swollman# the relevant documents. 214575267Swollman 2146149514Swollman# From Alan Perry (1996-02-15): 214717200Swollman# A guy from our Mexico subsidiary finally found the Presidential Decree 214817200Swollman# outlining the timezone changes in Mexico. 214958787Sru# 215017200Swollman# ------------- Begin Forwarded Message ------------- 215158787Sru# 215217200Swollman# I finally got my hands on the Official Presidential Decree that sets up the 215317200Swollman# rules for the DST changes. The rules are: 215458787Sru# 215517200Swollman# 1. The country is divided in 3 timezones: 215617200Swollman# - Baja California Norte (the Mexico/BajaNorte TZ) 215717200Swollman# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 215817200Swollman# - The rest of the country (the Mexico/General TZ) 215958787Sru# 216017200Swollman# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 216117200Swollman# at 2:00 AM, the times in each zone are as follows: 216217200Swollman# BajaNorte: GMT+7 216317200Swollman# BajaSur: GMT+6 216417200Swollman# General: GMT+5 216558787Sru# 216617200Swollman# 3. The rest of the year, the times are as follows: 216717200Swollman# BajaNorte: GMT+8 216817200Swollman# BajaSur: GMT+7 216917200Swollman# General: GMT+6 217058787Sru# 217117200Swollman# The Decree was published in Mexico's Official Newspaper on January 4th. 217258787Sru# 217317200Swollman# -------------- End Forwarded Message -------------- 217417200Swollman# From Paul Eggert (1996-06-12): 217543014Swollman# For an English translation of the decree, see 2176273718Sedwin# "Diario Oficial: Time Zone Changeover" (1996-01-04). 2177273718Sedwin# http://mexico-travel.com/extra/timezone_eng.html 217814343Swollman 217943543Swollman# From Rives McDow (1998-10-08): 218043543Swollman# The State of Quintana Roo has reverted back to central STD and DST times 218143543Swollman# (i.e. UTC -0600 and -0500 as of 1998-08-02). 218243543Swollman 218358787Sru# From Rives McDow (2000-01-10): 218458787Sru# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 218558787Sru# zone 5 hours from the International Date Line, and will not observe daylight 218658787Sru# savings time so as to stay on the same time zone as the southern part of 218758787Sru# Arizona year round. 218858787Sru 2189270728Spluknet# From Jesper N��rgaard, translating 219075267Swollman# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 219175267Swollman# In Oaxaca, the 55.000 teachers from the Section 22 of the National 219275267Swollman# Syndicate of Education Workers, refuse to apply daylight saving each 219375267Swollman# year, so that the more than 10,000 schools work at normal hour the 219475267Swollman# whole year. 219575267Swollman 219675267Swollman# From Gwillim Law (2001-01-19): 219775267Swollman# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 219875267Swollman# (translated):... 219975267Swollman# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 220075267Swollman# that Summer Time will be reduced from seven to five months, starting 220175267Swollman# this year.... 2202273718Sedwin# http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 220375267Swollman# [translated], says "summer time will ... take effect on the first Sunday 220475267Swollman# in May, and end on the last Sunday of September. 220575267Swollman 220675267Swollman# From Arthur David Olson (2001-01-25): 220775267Swollman# The 2001-01-24 traditional Washington Post contained the page one 220875267Swollman# story "Timely Issue Divides Mexicans."... 220975267Swollman# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2210270728Spluknet# ... Mexico City Mayor L��pez Obrador "...is threatening to keep 221175267Swollman# Mexico City and its 20 million residents on a different time than 2212270728Spluknet# the rest of the country..." In particular, L��pez Obrador would abolish 221375267Swollman# observation of Daylight Saving Time. 221475267Swollman 221575267Swollman# Official statute published by the Energy Department 2216273718Sedwin# http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre 2217270728Spluknet# (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2218270728Spluknet# and Sonora with no DST. This was reported by Jesper N��rgaard (2001-02-03). 221975267Swollman 222075267Swollman# From Paul Eggert (2001-03-03): 222175267Swollman# 2222273718Sedwin# http://www.latimes.com/news/nation/20010303/t000018766.html 222375267Swollman# James F. Smith writes in today's LA Times 222475267Swollman# * Sonora will continue to observe standard time. 2225270728Spluknet# * Last week Mexico City's mayor Andr��s Manuel L��pez Obrador decreed that 222675267Swollman# the Federal District will not adopt DST. 222775267Swollman# * 4 of 16 district leaders announced they'll ignore the decree. 222875267Swollman# * The decree does not affect federal-controlled facilities including 222975267Swollman# the airport, banks, hospitals, and schools. 223075267Swollman# 223175267Swollman# For now we'll assume that the Federal District will bow to federal rules. 223275267Swollman 2233270728Spluknet# From Jesper N��rgaard (2001-04-01): 223475267Swollman# I found some references to the Mexican application of daylight 223575267Swollman# saving, which modifies what I had already sent you, stating earlier 223675267Swollman# that a number of northern Mexican states would go on daylight 223775267Swollman# saving. The modification reverts this to only cover Baja California 223875267Swollman# (Norte), while all other states (except Sonora, who has no daylight 223975267Swollman# saving all year) will follow the original decree of president 224075267Swollman# Vicente Fox, starting daylight saving May 6, 2001 and ending 224175267Swollman# September 30, 2001. 2242270728Spluknet# References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp> 224375267Swollman# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 224475267Swollman 224586222Swollman# From Reuters (2001-09-04): 224686222Swollman# Mexico's Supreme Court on Tuesday declared that daylight savings was 224786222Swollman# unconstitutional in Mexico City, creating the possibility the 224886222Swollman# capital will be in a different time zone from the rest of the nation 224986222Swollman# next year.... The Supreme Court's ruling takes effect at 2:00 225086222Swollman# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 225186222Swollman# standard time. "This is so residents of the Federal District are not 225286222Swollman# subject to unexpected time changes," a statement from the court said. 225386222Swollman 2254270728Spluknet# From Jesper N��rgaard Welen (2002-03-12): 225593799Swollman# ... consulting my local grocery store(!) and my coworkers, they all insisted 225693799Swollman# that a new decision had been made to reinstate US style DST in Mexico.... 225793799Swollman# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 225893799Swollman# confirms this. Sonora as usual is the only state where DST is not applied. 225993799Swollman 2260203019Sedwin# From Steffen Thorsen (2009-12-28): 2261203019Sedwin# 2262203019Sedwin# Steffen Thorsen wrote: 2263203019Sedwin# > Mexico's House of Representatives has approved a proposal for northern 2264203019Sedwin# > Mexico's border cities to share the same daylight saving schedule as 2265203019Sedwin# > the United States. 2266203019Sedwin# Now this has passed both the Congress and the Senate, so starting from 2267203019Sedwin# 2010, some border regions will be the same: 2268203019Sedwin# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2269203019Sedwin# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2270203019Sedwin# (Spanish) 2271203019Sedwin# 2272203019Sedwin# Could not find the new law text, but the proposed law text changes are here: 2273203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2274203019Sedwin# (Gaceta Parlamentaria) 2275203019Sedwin# 2276203019Sedwin# There is also a list of the votes here: 2277203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2278203019Sedwin# 2279203019Sedwin# Our page: 2280203019Sedwin# http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2281203019Sedwin 2282203019Sedwin# From Arthur David Olson (2010-01-20): 2283203019Sedwin# The page 2284203019Sedwin# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2285203019Sedwin# includes this text: 2286203019Sedwin# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2287270728Spluknet# Ju��rez y Ojinaga en Chihuahua; Acu��a y Piedras Negras en Coahuila; 2288270728Spluknet# An��huac en Nuevo Le��n; y Nuevo Laredo, Reynosa y Matamoros en 2289270728Spluknet# Tamaulipas, la aplicaci��n de este horario estacional surtir�� efecto 2290270728Spluknet# desde las dos horas del segundo domingo de marzo y concluir�� a las dos 2291203019Sedwin# horas del primer domingo de noviembre. 2292203019Sedwin# En los municipios fronterizos que se encuentren ubicados en la franja 2293270728Spluknet# fronteriza norte en el territorio comprendido entre la l��nea 2294270728Spluknet# internacional y la l��nea paralela ubicada a una distancia de veinte 2295270728Spluknet# kil��metros, as�� como la Ciudad de Ensenada, Baja California, hacia el 2296270728Spluknet# interior del pa��s, la aplicaci��n de este horario estacional surtir�� 2297270728Spluknet# efecto desde las dos horas del segundo domingo de marzo y concluir�� a 2298203019Sedwin# las dos horas del primer domingo de noviembre. 2299203019Sedwin 2300279706Sedwin# From Steffen Thorsen (2014-12-08), translated by Gwillim Law: 2301279706Sedwin# The Mexican state of Quintana Roo will likely change to EST in 2015. 2302279706Sedwin# 2303279706Sedwin# http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo 2304279706Sedwin# "With this change, the time conflict that has existed between the municipios 2305279706Sedwin# of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an 2306279706Sedwin# end. The latter declared itself in rebellion 15 years ago when a time change 2307279706Sedwin# was initiated in Mexico, and since then it has refused to change its time 2308279706Sedwin# zone along with the rest of the country." 2309279706Sedwin# 2310279706Sedwin# From Steffen Thorsen (2015-01-14), translated by Gwillim Law: 2311279706Sedwin# http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html 2312279706Sedwin# "...the new time zone will come into effect at two o'clock on the first Sunday 2313279706Sedwin# of February, when we will have to advance the clock one hour from its current 2314279706Sedwin# time..." 2315279706Sedwin# 2316279706Sedwin# Also, the new zone will not use DST. 2317279706Sedwin 23182742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 23192742SwollmanRule Mexico 1939 only - Feb 5 0:00 1:00 D 23202742SwollmanRule Mexico 1939 only - Jun 25 0:00 0 S 23212742SwollmanRule Mexico 1940 only - Dec 9 0:00 1:00 D 23222742SwollmanRule Mexico 1941 only - Apr 1 0:00 0 S 2323121098SwollmanRule Mexico 1943 only - Dec 16 0:00 1:00 W # War 23242742SwollmanRule Mexico 1944 only - May 1 0:00 0 S 23252742SwollmanRule Mexico 1950 only - Feb 12 0:00 1:00 D 23262742SwollmanRule Mexico 1950 only - Jul 30 0:00 0 S 232775267SwollmanRule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 232875267SwollmanRule Mexico 1996 2000 - Oct lastSun 2:00 0 S 232993799SwollmanRule Mexico 2001 only - May Sun>=1 2:00 1:00 D 233093799SwollmanRule Mexico 2001 only - Sep lastSun 2:00 0 S 233193799SwollmanRule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 233293799SwollmanRule Mexico 2002 max - Oct lastSun 2:00 0 S 23332742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2334270728Spluknet# Quintana Roo; represented by Canc��n 233558787SruZone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 233675267Swollman -6:00 - CST 1981 Dec 23 233743543Swollman -5:00 Mexico E%sT 1998 Aug 2 2:00 2338279706Sedwin -6:00 Mexico C%sT 2015 Feb 1 2:00 2339279706Sedwin -5:00 - EST 2340270728Spluknet# Campeche, Yucat��n; represented by M��rida 234164499SwollmanZone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 234275267Swollman -6:00 - CST 1981 Dec 23 234364499Swollman -5:00 - EST 1982 Dec 2 234464499Swollman -6:00 Mexico C%sT 2345270728Spluknet# Coahuila, Durango, Nuevo Le��n, Tamaulipas (near US border) 2346203019SedwinZone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2347203019Sedwin -6:00 - CST 1988 2348203019Sedwin -6:00 US C%sT 1989 2349203019Sedwin -6:00 Mexico C%sT 2010 2350203019Sedwin -6:00 US C%sT 2351270728Spluknet# Coahuila, Durango, Nuevo Le��n, Tamaulipas (away from US border) 235275267SwollmanZone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 235364499Swollman -6:00 - CST 1988 235464499Swollman -6:00 US C%sT 1989 235564499Swollman -6:00 Mexico C%sT 235643014Swollman# Central Mexico 2357273718SedwinZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 23582742Swollman -7:00 - MST 1927 Jun 10 23:00 23592742Swollman -6:00 - CST 1930 Nov 15 23602742Swollman -7:00 - MST 1931 May 1 23:00 23612742Swollman -6:00 - CST 1931 Oct 236275267Swollman -7:00 - MST 1932 Apr 1 2363273718Sedwin -6:00 Mexico C%sT 2001 Sep 30 2:00 236493799Swollman -6:00 - CST 2002 Feb 20 236593799Swollman -6:00 Mexico C%sT 2366203019Sedwin# Chihuahua (near US border) 2367273718SedwinZone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2368203019Sedwin -7:00 - MST 1927 Jun 10 23:00 2369203019Sedwin -6:00 - CST 1930 Nov 15 2370203019Sedwin -7:00 - MST 1931 May 1 23:00 2371203019Sedwin -6:00 - CST 1931 Oct 2372203019Sedwin -7:00 - MST 1932 Apr 1 2373203019Sedwin -6:00 - CST 1996 2374203019Sedwin -6:00 Mexico C%sT 1998 2375273718Sedwin -6:00 - CST 1998 Apr Sun>=1 3:00 2376203019Sedwin -7:00 Mexico M%sT 2010 2377203019Sedwin -7:00 US M%sT 2378203019Sedwin# Chihuahua (away from US border) 237958787SruZone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 238043014Swollman -7:00 - MST 1927 Jun 10 23:00 238143014Swollman -6:00 - CST 1930 Nov 15 238243014Swollman -7:00 - MST 1931 May 1 23:00 238343014Swollman -6:00 - CST 1931 Oct 238475267Swollman -7:00 - MST 1932 Apr 1 238543014Swollman -6:00 - CST 1996 238643014Swollman -6:00 Mexico C%sT 1998 2387273718Sedwin -6:00 - CST 1998 Apr Sun>=1 3:00 238843014Swollman -7:00 Mexico M%sT 238958787Sru# Sonora 239058787SruZone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 239158787Sru -7:00 - MST 1927 Jun 10 23:00 239258787Sru -6:00 - CST 1930 Nov 15 239358787Sru -7:00 - MST 1931 May 1 23:00 239458787Sru -6:00 - CST 1931 Oct 239575267Swollman -7:00 - MST 1932 Apr 1 239664499Swollman -6:00 - CST 1942 Apr 24 239758787Sru -7:00 - MST 1949 Jan 14 239858787Sru -8:00 - PST 1970 239958787Sru -7:00 Mexico M%sT 1999 240058787Sru -7:00 - MST 2401207898Sedwin 2402207898Sedwin# From Alexander Krivenyshev (2010-04-21): 2403270728Spluknet# According to news, Bah��a de Banderas (Mexican state of Nayarit) 2404207898Sedwin# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2405207898Sedwin# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2406207898Sedwin# 2407207898Sedwin# (Spanish) 2408270728Spluknet# Bah��a de Banderas homologa su horario al del centro del 2409270728Spluknet# pa��s, a partir de este domingo 2410207898Sedwin# http://www.nayarit.gob.mx/notes.asp?id=20748 2411207898Sedwin# 2412270728Spluknet# Bah��a de Banderas homologa su horario con el del Centro del 2413270728Spluknet# Pa��s 2414270728Spluknet# 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 2415207898Sedwin# 2416207898Sedwin# (English) 2417270728Spluknet# Puerto Vallarta and Bah��a de Banderas: One Time Zone 2418207898Sedwin# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2419207898Sedwin# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2420207898Sedwin# 2421207898Sedwin# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2422270728Spluknet# will allow Bah��a de Banderas and Puerto Vallarta to share the same time 2423207898Sedwin# zone ..." 242464499Swollman# Baja California Sur, Nayarit, Sinaloa 2425207898Sedwin 2426207898Sedwin# From Arthur David Olson (2010-05-01): 2427207898Sedwin# Use "Bahia_Banderas" to keep the name to fourteen characters. 2428207898Sedwin 2429270728Spluknet# Mazatl��n 24302742SwollmanZone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 24312742Swollman -7:00 - MST 1927 Jun 10 23:00 24322742Swollman -6:00 - CST 1930 Nov 15 24332742Swollman -7:00 - MST 1931 May 1 23:00 24342742Swollman -6:00 - CST 1931 Oct 243575267Swollman -7:00 - MST 1932 Apr 1 243664499Swollman -6:00 - CST 1942 Apr 24 24372742Swollman -7:00 - MST 1949 Jan 14 24382742Swollman -8:00 - PST 1970 243914343Swollman -7:00 Mexico M%sT 2440207898Sedwin 2441270728Spluknet# Bah��a de Banderas 2442207898SedwinZone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2443207898Sedwin -7:00 - MST 1927 Jun 10 23:00 2444207898Sedwin -6:00 - CST 1930 Nov 15 2445207898Sedwin -7:00 - MST 1931 May 1 23:00 2446207898Sedwin -6:00 - CST 1931 Oct 2447207898Sedwin -7:00 - MST 1932 Apr 1 2448207898Sedwin -6:00 - CST 1942 Apr 24 2449207898Sedwin -7:00 - MST 1949 Jan 14 2450207898Sedwin -8:00 - PST 1970 2451273718Sedwin -7:00 Mexico M%sT 2010 Apr 4 2:00 2452207898Sedwin -6:00 Mexico C%sT 2453207898Sedwin 2454203019Sedwin# Baja California (near US border) 24552742SwollmanZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 245675267Swollman -7:00 - MST 1924 24572742Swollman -8:00 - PST 1927 Jun 10 23:00 245875267Swollman -7:00 - MST 1930 Nov 15 245975267Swollman -8:00 - PST 1931 Apr 1 246075267Swollman -8:00 1:00 PDT 1931 Sep 30 246164499Swollman -8:00 - PST 1942 Apr 24 2462158421Swollman -8:00 1:00 PWT 1945 Aug 14 23:00u 2463158421Swollman -8:00 1:00 PPT 1945 Nov 12 # Peace 246475267Swollman -8:00 - PST 1948 Apr 5 246575267Swollman -8:00 1:00 PDT 1949 Jan 14 246675267Swollman -8:00 - PST 1954 246775267Swollman -8:00 CA P%sT 1961 246875267Swollman -8:00 - PST 1976 246914343Swollman -8:00 US P%sT 1996 247075267Swollman -8:00 Mexico P%sT 2001 247193799Swollman -8:00 US P%sT 2002 Feb 20 2472203019Sedwin -8:00 Mexico P%sT 2010 2473203019Sedwin -8:00 US P%sT 2474203019Sedwin# Baja California (away from US border) 2475203019SedwinZone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2476203019Sedwin -7:00 - MST 1924 2477203019Sedwin -8:00 - PST 1927 Jun 10 23:00 2478203019Sedwin -7:00 - MST 1930 Nov 15 2479203019Sedwin -8:00 - PST 1931 Apr 1 2480203019Sedwin -8:00 1:00 PDT 1931 Sep 30 2481203019Sedwin -8:00 - PST 1942 Apr 24 2482203019Sedwin -8:00 1:00 PWT 1945 Aug 14 23:00u 2483203019Sedwin -8:00 1:00 PPT 1945 Nov 12 # Peace 2484203019Sedwin -8:00 - PST 1948 Apr 5 2485203019Sedwin -8:00 1:00 PDT 1949 Jan 14 2486203019Sedwin -8:00 - PST 1954 2487203019Sedwin -8:00 CA P%sT 1961 2488203019Sedwin -8:00 - PST 1976 2489203019Sedwin -8:00 US P%sT 1996 2490203019Sedwin -8:00 Mexico P%sT 2001 2491203019Sedwin -8:00 US P%sT 2002 Feb 20 249293799Swollman -8:00 Mexico P%sT 2493158421Swollman# From Paul Eggert (2006-03-22): 249475267Swollman# Formerly there was an America/Ensenada zone, which differed from 249575267Swollman# America/Tijuana only in that it did not observe DST from 1976 2496158421Swollman# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2497158421Swollman# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2498270728Spluknet# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 2499158421Swollman# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 250075267Swollman# DST-observance was a town-by-town matter back then. This concerns 250175267Swollman# data after 1970 so most likely there should be at least one Zone 250275267Swollman# other than America/Tijuana for Baja, but it's not clear yet what its 250375267Swollman# name or contents should be. 25042742Swollman# 25052742Swollman# Revillagigedo Is 25062742Swollman# no information 25072742Swollman 25082742Swollman############################################################################### 25092742Swollman 25102742Swollman# Anguilla 2511270728Spluknet# See America/Port_of_Spain. 25122742Swollman 25132742Swollman# Antigua and Barbuda 25142742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25152742SwollmanZone America/Antigua -4:07:12 - LMT 1912 Mar 2 25162742Swollman -5:00 - EST 1951 25172742Swollman -4:00 - AST 25182742Swollman 25192742Swollman# Bahamas 2520169811Swollman# 2521248307Sedwin# For 1899 Milne gives -5:09:29.5; round that. 2522248307Sedwin# 2523169811Swollman# From Sue Williams (2006-12-07): 2524169811Swollman# The Bahamas announced about a month ago that they plan to change their DST 2525169811Swollman# rules to sync with the U.S. starting in 2007.... 2526169811Swollman# http://www.jonesbahamas.com/?c=45&a=10412 2527169811Swollman 25282742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2529181421SedwinRule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2530181421SedwinRule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 25312742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2532248307SedwinZone America/Nassau -5:09:30 - LMT 1912 Mar 2 2533169811Swollman -5:00 Bahamas E%sT 1976 2534169811Swollman -5:00 US E%sT 25352742Swollman 25362742Swollman# Barbados 2537248307Sedwin 2538248307Sedwin# For 1899 Milne gives -3:58:29.2; round that. 2539248307Sedwin 25402742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 25412742SwollmanRule Barb 1977 only - Jun 12 2:00 1:00 D 25422742SwollmanRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 25432742SwollmanRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 25442742SwollmanRule Barb 1979 only - Sep 30 2:00 0 S 25452742SwollmanRule Barb 1980 only - Sep 25 2:00 0 S 25462742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2547273718SedwinZone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2548273718Sedwin -3:58:29 - BMT 1932 # Bridgetown Mean Time 25492742Swollman -4:00 Barb A%sT 25502742Swollman 25512742Swollman# Belize 2552158421Swollman# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 25532742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 25542742SwollmanRule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 25552742SwollmanRule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 25562742SwollmanRule Belize 1973 only - Dec 5 0:00 1:00 D 25572742SwollmanRule Belize 1974 only - Feb 9 0:00 0 S 25582742SwollmanRule Belize 1982 only - Dec 18 0:00 1:00 D 25592742SwollmanRule Belize 1983 only - Feb 12 0:00 0 S 25602742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25612742SwollmanZone America/Belize -5:52:48 - LMT 1912 Apr 25622742Swollman -6:00 Belize C%sT 25632742Swollman 25642742Swollman# Bermuda 2565163302Sru 2566248307Sedwin# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2567248307Sedwin# Bermuda dockyard, Ireland I; round that. 2568248307Sedwin 2569163302Sru# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2570163302Sru 2571163302Sru# Next year, however, clocks in the US will go forward on the second Sunday 2572163302Sru# in March, until the first Sunday in November. And, after the Time Zone 2573163302Sru# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2574163302Sru# Friday, the same thing will happen in Bermuda. 2575163302Sru# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2576163302Sru 25772742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2578273718SedwinZone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 2579273718Sedwin -4:00 - AST 1974 Apr 28 2:00 2580257681Sedwin -4:00 Canada A%sT 1976 2581163302Sru -4:00 US A%sT 25822742Swollman 25832742Swollman# Cayman Is 25842742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2585273718SedwinZone America/Cayman -5:25:32 - LMT 1890 # Georgetown 2586273718Sedwin -5:07:11 - KMT 1912 Feb # Kingston Mean Time 25872742Swollman -5:00 - EST 25882742Swollman 25892742Swollman# Costa Rica 2590248307Sedwin 2591270728Spluknet# Milne gives -5:36:13.3 as San Jos�� mean time; round to nearest. 2592248307Sedwin 25932742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 25942742SwollmanRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 25952742SwollmanRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 259620094SwollmanRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2597158421Swollman# IATA SSIM (1991-09) says the following was at 1:00; 2598158421Swollman# go with Shanks & Pottenger. 259920094SwollmanRule CR 1991 only - Jul 1 0:00 0 S 260020094SwollmanRule CR 1992 only - Mar 15 0:00 0 S 2601270728Spluknet# There are too many San Jos��s elsewhere, so we'll use 'Costa Rica'. 26022742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2603273718SedwinZone America/Costa_Rica -5:36:13 - LMT 1890 # San Jos�� 2604270728Spluknet -5:36:13 - SJMT 1921 Jan 15 # San Jos�� Mean Time 26052742Swollman -6:00 CR C%sT 26062742Swollman# Coco 26072742Swollman# no information; probably like America/Costa_Rica 26082742Swollman 26092742Swollman# Cuba 26102742Swollman 2611248307Sedwin# From Paul Eggert (2013-02-21): 2612248307Sedwin# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2613248307Sedwin# for the port, and -5:30 for meteorological observations. 2614248307Sedwin# For now, stick with Shanks & Pottenger. 2615248307Sedwin 261658787Sru# From Arthur David Olson (1999-03-29): 261758787Sru# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 261858787Sru# the Cuban National Team and the Baltimore Orioles was carried live on 261958787Sru# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 262058787Sru# During the game, play-by-play announcer Jim Hunter noted that 262158787Sru# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 262258787Sru# Time today." (The "two hour" remark referred to losing one hour of 2623270728Spluknet# sleep on 1999-03-28 - when the announcers were in Cuba as it switched 2624270728Spluknet# to DST - and one more hour on 1999-04-04 - when the announcers will have 262558787Sru# returned to Baltimore, which switches on that date.) 26262742Swollman 2627259626Sedwin# From Steffen Thorsen (2013-11-11): 2628259626Sedwin# DST start in Cuba in 2004 ... does not follow the same rules as the 2629259626Sedwin# years before. The correct date should be Sunday 2004-03-28 00:00 ... 2630259626Sedwin# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 2631259626Sedwin 2632138323Swollman# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2633138323Swollman# Cuba is not going back to standard time this year. 2634158421Swollman# From Paul Eggert (2006-03-22): 2635138323Swollman# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2636138323Swollman# says that it's due to a problem at the Antonio Guiteras 2637138323Swollman# thermoelectric plant, and says "This October there will be no return 2638138323Swollman# to normal hours (after daylight saving time)". 2639158421Swollman# For now, let's assume that it's a temporary measure. 2640138323Swollman 2641153670Swollman# From Carlos A. Carnero Delgado (2005-11-12): 2642153670Swollman# This year (just like in 2004-2005) there's no change in time zone 2643153670Swollman# adjustment in Cuba. We will stay in daylight saving time: 2644153670Swollman# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2645153670Swollman 2646270728Spluknet# From Jesper N��rgaard Welen (2006-10-21): 2647169811Swollman# An article in GRANMA INTERNACIONAL claims that Cuba will end 2648169811Swollman# the 3 years of permanent DST next weekend, see 2649169811Swollman# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2650169811Swollman# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2651270728Spluknet# watches should be set back one hour - going back to 00:00 hours - returning 2652169811Swollman# to the normal schedule.... 2653163302Sru 2654169811Swollman# From Paul Eggert (2007-03-02): 2655270728Spluknet# <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday, 2656169811Swollman# says Cuban clocks will advance at midnight on March 10. 2657169811Swollman# For lack of better information, assume Cuba will use US rules, 2658169811Swollman# except that it switches at midnight standard time as usual. 2659173319Sedwin# 2660173319Sedwin# From Steffen Thorsen (2007-10-25): 2661240457Sedwin# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2662173319Sedwin# earlier - on the last Sunday of October, just like in 2006. 2663240457Sedwin# 2664173319Sedwin# He supplied these references: 2665240457Sedwin# 2666173319Sedwin# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2667173319Sedwin# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2668240457Sedwin# 2669270728Spluknet# From Alex Krivenyshev (2007-10-25): 2670173319Sedwin# Here is also article from Granma (Cuba): 2671240457Sedwin# 2672270728Spluknet# Regir�� el Horario Normal desde el pr��ximo domingo 28 de octubre 2673173319Sedwin# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2674240457Sedwin# 2675173319Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2676169811Swollman 2677177591Sedwin# From Arthur David Olson (2008-03-09): 2678177591Sedwin# I'm in Maryland which is now observing United States Eastern Daylight 2679177591Sedwin# Time. At 9:44 local time I used RealPlayer to listen to 2680177591Sedwin# http://media.enet.cu/radioreloj 2681270728Spluknet# a Cuban information station, and heard 2682177591Sedwin# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2683177591Sedwin# indicating that Cuba is still on standard time. 2684177591Sedwin 2685177591Sedwin# From Steffen Thorsen (2008-03-12): 2686177591Sedwin# It seems that Cuba will start DST on Sunday, 2007-03-16... 2687177591Sedwin# It was announced yesterday, according to this source (in Spanish): 2688177591Sedwin# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2689177591Sedwin# 2690177591Sedwin# Some more background information is posted here: 2691177591Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2692177591Sedwin# 2693177591Sedwin# The article also says that Cuba has been observing DST since 1963, 2694177591Sedwin# while Shanks (and tzdata) has 1965 as the first date (except in the 2695177591Sedwin# 1940's). Many other web pages in Cuba also claim that it has been 2696177591Sedwin# observed since 1963, but with the exception of 1970 - an exception 2697177591Sedwin# which is not present in tzdata/Shanks. So there is a chance we need to 2698177591Sedwin# change some historic records as well. 2699177591Sedwin# 2700177591Sedwin# One example: 2701177591Sedwin# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2702177591Sedwin 2703270728Spluknet# From Jesper N��rgaard Welen (2008-03-13): 2704177591Sedwin# The Cuban time change has just been confirmed on the most authoritative 2705177591Sedwin# web site, the Granma. Please check out 2706177591Sedwin# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2707177591Sedwin# 2708270728Spluknet# Basically as expected after Steffen Thorsen's information, the change 2709177591Sedwin# will take place midnight between Saturday and Sunday. 2710177591Sedwin 2711177591Sedwin# From Arthur David Olson (2008-03-12): 2712177591Sedwin# Assume Sun>=15 (third Sunday) going forward. 2713177591Sedwin 2714189923Sedwin# From Alexander Krivenyshev (2009-03-04) 2715189923Sedwin# According to the Radio Reloj - Cuba will start Daylight Saving Time on 2716189923Sedwin# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2717189923Sedwin# not on midnight March 14 / March 15 as previously thought. 2718189923Sedwin# 2719189923Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2720189923Sedwin# (in Spanish) 2721189923Sedwin 2722189923Sedwin# From Arthur David Olson (2009-03-09) 2723189923Sedwin# I listened over the Internet to 2724189923Sedwin# http://media.enet.cu/readioreloj 2725189923Sedwin# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2726270728Spluknet# the time was announced as "diez cinco" - the same time as here, indicating 2727189923Sedwin# that has indeed switched to DST. Assume second Sunday from 2009 forward. 2728189923Sedwin 2729219687Sedwin# From Steffen Thorsen (2011-03-08): 2730219687Sedwin# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2731219687Sedwin# this year. Nothing about the end date known so far (if that has 2732219687Sedwin# changed at all). 2733219687Sedwin# 2734219687Sedwin# Source: 2735219687Sedwin# http://granma.co.cu/2011/03/08/nacional/artic01.html 2736219687Sedwin# 2737219687Sedwin# Our info: 2738219687Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2739226976Sedwin# 2740226976Sedwin# From Steffen Thorsen (2011-10-30) 2741240457Sedwin# Cuba will end DST two weeks later this year. Instead of going back 2742226976Sedwin# tonight, it has been delayed to 2011-11-13 at 01:00. 2743226976Sedwin# 2744226976Sedwin# One source (Spanish) 2745226976Sedwin# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2746226976Sedwin# 2747226976Sedwin# Our page: 2748226976Sedwin# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2749240457Sedwin# 2750240457Sedwin# From Steffen Thorsen (2012-03-01) 2751240457Sedwin# According to Radio Reloj, Cuba will start DST on Midnight between March 2752240457Sedwin# 31 and April 1. 2753240457Sedwin# 2754240457Sedwin# Radio Reloj has the following info (Spanish): 2755240457Sedwin# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2756240457Sedwin# 2757240457Sedwin# Our info on it: 2758240457Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2759219687Sedwin 2760242927Sedwin# From Steffen Thorsen (2012-11-03): 2761242927Sedwin# Radio Reloj and many other sources report that Cuba is changing back 2762242927Sedwin# to standard time on 2012-11-04: 2763242927Sedwin# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2764242927Sedwin# From Paul Eggert (2012-11-03): 2765242927Sedwin# For now, assume the future rule is first Sunday in November. 2766242927Sedwin 27672742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 27682742SwollmanRule Cuba 1928 only - Jun 10 0:00 1:00 D 27692742SwollmanRule Cuba 1928 only - Oct 10 0:00 0 S 27702742SwollmanRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 27712742SwollmanRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 27722742SwollmanRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 27732742SwollmanRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 27742742SwollmanRule Cuba 1965 only - Jun 1 0:00 1:00 D 27752742SwollmanRule Cuba 1965 only - Sep 30 0:00 0 S 27762742SwollmanRule Cuba 1966 only - May 29 0:00 1:00 D 27772742SwollmanRule Cuba 1966 only - Oct 2 0:00 0 S 27782742SwollmanRule Cuba 1967 only - Apr 8 0:00 1:00 D 27792742SwollmanRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 27802742SwollmanRule Cuba 1968 only - Apr 14 0:00 1:00 D 27812742SwollmanRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 27822742SwollmanRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 27832742SwollmanRule Cuba 1972 1974 - Oct 8 0:00 0 S 27842742SwollmanRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 27852742SwollmanRule Cuba 1978 only - May 7 0:00 1:00 D 278630711SwollmanRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 27872742SwollmanRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 27882742SwollmanRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 27892742SwollmanRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 279043014SwollmanRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 279120094SwollmanRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 279243014SwollmanRule Cuba 1996 only - Oct 6 0:00s 0 S 279343014SwollmanRule Cuba 1997 only - Oct 12 0:00s 0 S 279458787SruRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2795138323SwollmanRule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2796259626SedwinRule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 2797259626SedwinRule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 2798226976SedwinRule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 2799177591SedwinRule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2800189923SedwinRule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2801219687SedwinRule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 2802219687SedwinRule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 2803226976SedwinRule Cuba 2011 only - Nov 13 0:00s 0 S 2804240457SedwinRule Cuba 2012 only - Apr 1 0:00s 1:00 D 2805242927SedwinRule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 2806240457SedwinRule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 28072742Swollman 28082742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28092742SwollmanZone America/Havana -5:29:28 - LMT 1890 281058787Sru -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 28112742Swollman -5:00 Cuba C%sT 28122742Swollman 28132742Swollman# Dominica 2814270728Spluknet# See America/Port_of_Spain. 28152742Swollman 28162742Swollman# Dominican Republic 281775267Swollman 281875267Swollman# From Steffen Thorsen (2000-10-30): 281975267Swollman# Enrique Morales reported to me that the Dominican Republic has changed the 282075267Swollman# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 282175267Swollman# http://www.listin.com.do/antes/261000/republica/princi.html 282275267Swollman 282375267Swollman# From Paul Eggert (2000-12-04): 282475267Swollman# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 282575267Swollman 282675267Swollman# From Rives McDow (2000-12-01): 282775267Swollman# Dominican Republic changed its mind and presidential decree on Tuesday, 282875267Swollman# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 282975267Swollman# Dominican Republic will be reverting to 8 hours from the International Date 283075267Swollman# Line, and will not be using DST in the foreseeable future. The reason they 283175267Swollman# decided to use DST was to be in synch with Puerto Rico, who was also going 283275267Swollman# to implement DST. When Puerto Rico didn't implement DST, the president 283375267Swollman# decided to revert. 283475267Swollman 283575267Swollman 28362742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 28372742SwollmanRule DR 1966 only - Oct 30 0:00 1:00 D 28382742SwollmanRule DR 1967 only - Feb 28 0:00 0 S 28392742SwollmanRule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 28402742SwollmanRule DR 1970 only - Feb 21 0:00 0 S 28412742SwollmanRule DR 1971 only - Jan 20 0:00 0 S 28422742SwollmanRule DR 1972 1974 - Jan 21 0:00 0 S 28432742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28442742SwollmanZone America/Santo_Domingo -4:39:36 - LMT 1890 28452742Swollman -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 28462742Swollman -5:00 DR E%sT 1974 Oct 27 2847273718Sedwin -4:00 - AST 2000 Oct 29 2:00 2848273718Sedwin -5:00 US E%sT 2000 Dec 3 1:00 28492742Swollman -4:00 - AST 28502742Swollman 28512742Swollman# El Salvador 2852158421Swollman 28532742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 28542742SwollmanRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 28552742SwollmanRule Salv 1987 1988 - Sep lastSun 0:00 0 S 2856121098Swollman# There are too many San Salvadors elsewhere, so use America/El_Salvador 2857121098Swollman# instead of America/San_Salvador. 28582742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2859273718SedwinZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 28602742Swollman -6:00 Salv C%sT 28612742Swollman 28622742Swollman# Grenada 28632742Swollman# Guadeloupe 2864270728Spluknet# St Barth��lemy 2865174242Sedwin# St Martin (French part) 2866270728Spluknet# See America/Port_of_Spain. 28672742Swollman 28682742Swollman# Guatemala 2869158421Swollman# 2870158421Swollman# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2871158421Swollman# Diario Co Latino, at 2872270728Spluknet# <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>, 2873158421Swollman# says in an article dated 2006-04-19 that the Guatemalan government had 2874158421Swollman# decided on that date to advance official time by 60 minutes, to lessen the 2875158421Swollman# impact of the elevated cost of oil.... Daylight saving time will last from 2876158421Swollman# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2877163302Sru# From Paul Eggert (2006-06-22): 2878163302Sru# The Ministry of Energy and Mines, press release CP-15/2006 2879163302Sru# (2006-04-19), says DST ends at 24:00. See 2880273718Sedwin# http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf 2881163302Sru 28822742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 28832742SwollmanRule Guat 1973 only - Nov 25 0:00 1:00 D 28842742SwollmanRule Guat 1974 only - Feb 24 0:00 0 S 28852742SwollmanRule Guat 1983 only - May 21 0:00 1:00 D 28862742SwollmanRule Guat 1983 only - Sep 22 0:00 0 S 288720094SwollmanRule Guat 1991 only - Mar 23 0:00 1:00 D 288820094SwollmanRule Guat 1991 only - Sep 7 0:00 0 S 2889158421SwollmanRule Guat 2006 only - Apr 30 0:00 1:00 D 2890158421SwollmanRule Guat 2006 only - Oct 1 0:00 0 S 28912742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28922742SwollmanZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 28932742Swollman -6:00 Guat C%sT 28942742Swollman 28952742Swollman# Haiti 2896149514Swollman# From Gwillim Law (2005-04-15): 2897270728Spluknet# Risto O. Nyk��nen wrote me that Haiti is now on DST. 2898270728Spluknet# I searched for confirmation, and I found a press release 2899149514Swollman# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 2900270728Spluknet# <http://www.haitianconsulate.org/time.doc>. Translated from French, it says: 2901149514Swollman# 2902149514Swollman# "The Prime Minister's Communication Office notifies the public in general 2903149514Swollman# and the press in particular that, following a decision of the Interior 2904149514Swollman# Ministry and the Territorial Collectivities [I suppose that means the 2905149514Swollman# provinces], Haiti will move to Eastern Daylight Time in the night from next 2906149514Swollman# Saturday the 2nd to Sunday the 3rd. 2907149514Swollman# 2908149514Swollman# "Consequently, the Prime Minister's Communication Office wishes to inform 2909149514Swollman# the population that the country's clocks will be set forward one hour 2910149514Swollman# starting at midnight. This provision will hold until the last Saturday in 2911149514Swollman# October 2005. 2912149514Swollman# 2913149514Swollman# "Port-au-Prince, March 31, 2005" 2914158421Swollman# 2915158421Swollman# From Steffen Thorsen (2006-04-04): 2916158421Swollman# I have been informed by users that Haiti observes DST this year like 2917158421Swollman# last year, so the current "only" rule for 2005 might be changed to a 2918158421Swollman# "max" rule or to last until 2006. (Who knows if they will observe DST 2919158421Swollman# next year or if they will extend their DST like US/Canada next year). 2920158421Swollman# 2921158421Swollman# I have found this article about it (in French): 2922158421Swollman# http://www.haitipressnetwork.com/news.cfm?articleID=7612 2923158421Swollman# 2924158421Swollman# The reason seems to be an energy crisis. 2925149514Swollman 2926169811Swollman# From Stephen Colebourne (2007-02-22): 2927169811Swollman# Some IATA info: Haiti won't be having DST in 2007. 2928158421Swollman 2929240457Sedwin# From Steffen Thorsen (2012-03-11): 2930240457Sedwin# According to several news sources, Haiti will observe DST this year, 2931240457Sedwin# apparently using the same start and end date as USA/Canada. 2932240457Sedwin# So this means they have already changed their time. 2933240457Sedwin# 2934240457Sedwin# http://www.alterpresse.org/spip.php?article12510 2935240457Sedwin# http://radiovision2000haiti.net/home/?p=13253 2936240457Sedwin# 2937240457Sedwin# From Arthur David Olson (2012-03-11): 2938240457Sedwin# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 2939240457Sedwin# 3:00 a.m. rather than the traditional Haitian jump at midnight. 2940248307Sedwin# Assume a US-style fall back as well. 2941240457Sedwin 2942248307Sedwin# From Steffen Thorsen (2013-03-10): 2943248307Sedwin# It appears that Haiti is observing DST this year as well, same rules 2944248307Sedwin# as US/Canada. They did it last year as well, and it looks like they 2945248307Sedwin# are going to observe DST every year now... 2946248307Sedwin# 2947248307Sedwin# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 2948248307Sedwin# http://www.canalplushaiti.net/?p=6714 2949248307Sedwin 29502742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 29512742SwollmanRule Haiti 1983 only - May 8 0:00 1:00 D 29522742SwollmanRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 29532742SwollmanRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 2954158421Swollman# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 2955158421Swollman# Go with IATA. 295643014SwollmanRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 295743014SwollmanRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 2958169811SwollmanRule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 2959169811SwollmanRule Haiti 2005 2006 - Oct lastSun 0:00 0 S 2960248307SedwinRule Haiti 2012 max - Mar Sun>=8 2:00 1:00 D 2961248307SedwinRule Haiti 2012 max - Nov Sun>=1 2:00 0 S 29622742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29632742SwollmanZone America/Port-au-Prince -4:49:20 - LMT 1890 29642742Swollman -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 29652742Swollman -5:00 Haiti E%sT 29662742Swollman 29672742Swollman# Honduras 2968158421Swollman# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 2969158421Swollman 2970158421Swollman# From Paul Eggert (2006-05-05): 2971158421Swollman# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 2972158421Swollman# saying Honduras will start using DST midnight Saturday, effective 4 2973158421Swollman# months until September. La Tribuna reported today 2974158421Swollman# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 2975163302Sru# of Honduras, refused to back down on this. 2976158421Swollman 2977270728Spluknet# From Jesper N��rgaard Welen (2006-08-08): 2978163302Sru# It seems that Honduras has returned from DST to standard time this Monday at 2979163302Sru# 00:00 hours (prolonging Sunday to 25 hours duration). 2980163302Sru# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 2981163302Sru 2982163302Sru# From Paul Eggert (2006-08-08): 2983273718Sedwin# Also see Diario El Heraldo, The country returns to standard time (2006-08-08). 2984273718Sedwin# http://www.elheraldo.hn/nota.php?nid=54941&sec=12 2985163302Sru# It mentions executive decree 18-2006. 2986163302Sru 2987163302Sru# From Steffen Thorsen (2006-08-17): 2988163302Sru# Honduras will observe DST from 2007 to 2009, exact dates are not 2989163302Sru# published, I have located this authoritative source: 2990163302Sru# http://www.presidencia.gob.hn/noticia.aspx?nId=47 2991163302Sru 2992169811Swollman# From Steffen Thorsen (2007-03-30): 2993169811Swollman# http://www.laprensahn.com/pais_nota.php?id04962=7386 2994169811Swollman# So it seems that Honduras will not enter DST this year.... 2995169811Swollman 2996158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2997158421SwollmanRule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 2998158421SwollmanRule Hond 1987 1988 - Sep lastSun 0:00 0 S 2999169811SwollmanRule Hond 2006 only - May Sun>=1 0:00 1:00 D 3000169811SwollmanRule Hond 2006 only - Aug Mon>=1 0:00 0 S 30012742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 30022742SwollmanZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3003158421Swollman -6:00 Hond C%sT 300443543Swollman# 300543543Swollman# Great Swan I ceded by US to Honduras in 1972 30062742Swollman 30072742Swollman# Jamaica 3008257681Sedwin# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3009257681Sedwin# unspecified official document, and says "This time is used throughout the 3010257681Sedwin# island". Go with Milne. Round to the nearest second as required by zic. 3011273718Sedwin# 3012273718Sedwin# Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but 3013273718Sedwin# Lance Neita writes that Prime Minister Michael Manley decreed it January 5. 3014273718Sedwin# Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that 3015273718Sedwin# Manley's supporters associated this act with Manley's nickname "Joshua" 3016273718Sedwin# (recall that in the Bible the sun stood still at Joshua's request), 3017273718Sedwin# and with the Rod of Correction which Manley said he had received from 3018273718Sedwin# Haile Selassie, Emperor of Ethiopia. See: 3019273718Sedwin# Neita L. The politician in all of us. Jamaica Observer 2014-09-20 3020273718Sedwin# http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 3021273718Sedwin# 30222742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3023273718SedwinZone America/Jamaica -5:07:11 - LMT 1890 # Kingston 3024257681Sedwin -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3025273718Sedwin -5:00 - EST 1974 302620094Swollman -5:00 US E%sT 1984 302720094Swollman -5:00 - EST 30282742Swollman 30292742Swollman# Martinique 30302742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3031273718SedwinZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 3032273718Sedwin -4:04:20 - FFMT 1911 May # Fort-de-France MT 30332742Swollman -4:00 - AST 1980 Apr 6 30342742Swollman -4:00 1:00 ADT 1980 Sep 28 30352742Swollman -4:00 - AST 30362742Swollman 30372742Swollman# Montserrat 3038270728Spluknet# See America/Port_of_Spain. 30392742Swollman 30402742Swollman# Nicaragua 304143543Swollman# 3042158421Swollman# This uses Shanks & Pottenger for times before 2005. 304343543Swollman# 3044149514Swollman# From Steffen Thorsen (2005-04-12): 3045149514Swollman# I've got reports from 8 different people that Nicaragua just started 3046149514Swollman# DST on Sunday 2005-04-10, in order to save energy because of 3047149514Swollman# expensive petroleum. The exact end date for DST is not yet 3048149514Swollman# announced, only "September" but some sites also say "mid-September". 3049149514Swollman# Some background information is available on the President's official site: 3050149514Swollman# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3051149514Swollman# The Decree, no 23-2005 is available here: 3052149514Swollman# 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 3053149514Swollman# 3054149514Swollman# From Paul Eggert (2005-05-01): 3055149514Swollman# The decree doesn't say anything about daylight saving, but for now let's 3056158421Swollman# assume that it is daylight saving.... 3057149514Swollman# 3058149514Swollman# From Gwillim Law (2005-04-21): 3059149514Swollman# The Associated Press story on the time change, which can be found at 3060149514Swollman# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3061273718Sedwin# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3062149514Swollman# time that a change of clocks was applied to save energy was in the year 2000 3063270728Spluknet# during the Arnoldo Alem��n administration."... 3064149514Swollman# The northamerica file says that Nicaragua has been on UTC-6 continuously 3065149514Swollman# since December 1998. I wasn't able to find any details of Nicaraguan time 3066149514Swollman# changes in 2000. Perhaps a note could be added to the northamerica file, to 3067149514Swollman# the effect that we have indirect evidence that DST was observed in 2000. 3068149514Swollman# 3069270728Spluknet# From Jesper N��rgaard Welen (2005-11-02): 3070153670Swollman# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3071153670Swollman# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3072153670Swollman# (2005-09-26) 3073153670Swollman# 3074270728Spluknet# From Jesper N��rgaard Welen (2006-05-05): 3075158421Swollman# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3076158421Swollman# (my informal translation) 3077270728Spluknet# By order of the president of the republic, Enrique Bola��os, Nicaragua 3078158421Swollman# advanced by sixty minutes their official time, yesterday at 2 in the 3079270728Spluknet# morning, and will stay that way until 30th of September. 3080158421Swollman# 3081270728Spluknet# From Jesper N��rgaard Welen (2006-09-30): 3082163302Sru# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3083163302Sru# My informal translation runs: 3084163302Sru# The natural sun time is restored in all the national territory, in that the 3085163302Sru# time is returned one hour at 01:00 am of October 1 of 2006. 3086163302Sru# 30872742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 30882742SwollmanRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 30892742SwollmanRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3090149514SwollmanRule Nic 2005 only - Apr 10 0:00 1:00 D 3091163302SruRule Nic 2005 only - Oct Sun>=1 0:00 0 S 3092158421SwollmanRule Nic 2006 only - Apr 30 2:00 1:00 D 3093163302SruRule Nic 2006 only - Oct Sun>=1 1:00 0 S 30942742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 30952742SwollmanZone America/Managua -5:45:08 - LMT 1890 309686222Swollman -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 30972742Swollman -6:00 - CST 1973 May 30982742Swollman -5:00 - EST 1975 Feb 16 3099273718Sedwin -6:00 Nic C%sT 1992 Jan 1 4:00 3100158421Swollman -5:00 - EST 1992 Sep 24 3101158421Swollman -6:00 - CST 1993 3102158421Swollman -5:00 - EST 1997 3103149514Swollman -6:00 Nic C%sT 31042742Swollman 31052742Swollman# Panama 31062742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 31072742SwollmanZone America/Panama -5:18:08 - LMT 1890 3108273718Sedwin -5:19:36 - CMT 1908 Apr 22 # Col��n Mean Time 31092742Swollman -5:00 - EST 31102742Swollman 31112742Swollman# Puerto Rico 3112257681Sedwin# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 31132742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3114273718SedwinZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 31152742Swollman -4:00 - AST 1942 May 3 3116158421Swollman -4:00 US A%sT 1946 31172742Swollman -4:00 - AST 31182742Swollman 31192742Swollman# St Kitts-Nevis 31202742Swollman# St Lucia 3121270728Spluknet# See America/Port_of_Spain. 31222742Swollman 31232742Swollman# St Pierre and Miquelon 3124257681Sedwin# There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 31252742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3126273718SedwinZone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 31272742Swollman -4:00 - AST 1980 May 3128121098Swollman -3:00 - PMST 1987 # Pierre & Miquelon Time 3129121098Swollman -3:00 Canada PM%sT 31302742Swollman 31312742Swollman# St Vincent and the Grenadines 3132270728Spluknet# See America/Port_of_Spain. 31332742Swollman 31342742Swollman# Turks and Caicos 3135169811Swollman# 3136169811Swollman# From Chris Dunn in 3137273718Sedwin# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007 3138169811Swollman# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3139169811Swollman# daylight saving dates for time changes have been adjusted to match 3140169811Swollman# the recent U.S. change of dates. 3141169811Swollman# 3142169811Swollman# From Brian Inglis (2007-04-28): 3143169811Swollman# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3144169811Swollman# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3145169811Swollman# rows before that there is an out of date entry for Oct: 3146169811Swollman# "Eastern Standard Times Begins 2007 3147169811Swollman# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3148169811Swollman# indicating that the normal ET rules are followed. 3149169811Swollman# 3150273718Sedwin# From Paul Eggert (2014-08-19): 3151273718Sedwin# The 2014-08-13 Cabinet meeting decided to stay on UTC-4 year-round. See: 3152273718Sedwin# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm 3153274559Sedwin# Model this as a switch from EST/EDT to AST ... 3154274559Sedwin# From Chris Walton (2014-11-04): 3155274559Sedwin# ... the TCI government appears to have delayed the switch to 3156274559Sedwin# "permanent daylight saving time" by one year.... 3157274559Sedwin# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm 3158169811Swollman# 31592742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 31602742SwollmanZone America/Grand_Turk -4:44:32 - LMT 1890 3161273718Sedwin -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3162273718Sedwin -5:00 - EST 1979 3163274559Sedwin -5:00 US E%sT 2015 Nov Sun>=1 2:00 3164273718Sedwin -4:00 - AST 31658029Swollman 316614343Swollman# British Virgin Is 316714343Swollman# Virgin Is 3168270728Spluknet# See America/Port_of_Spain. 3169270728Spluknet 3170270728Spluknet 3171270728Spluknet# Local Variables: 3172270728Spluknet# coding: utf-8 3173270728Spluknet# End: 3174