northamerica revision 273438
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 62742Swollman# This data is by no means authoritative; if you think you know better, 72742Swollman# go ahead and edit the file (and please send any changes to 8243020Sedwin# tz@iana.org for general use in the future). 92742Swollman 10149514Swollman# From Paul Eggert (1999-03-22): 112742Swollman# A reliable and entertaining source about time zones is 1258787Sru# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 132742Swollman 142742Swollman############################################################################### 152742Swollman 162742Swollman# United States 172742Swollman 1858787Sru# From Paul Eggert (1999-03-31): 1958787Sru# Howse writes (pp 121-125) that time zones were invented by 2058787Sru# Professor Charles Ferdinand Dowd (1825-1904), 2158787Sru# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 22257682Sedwin# His pamphlet "A System of National Time for Railroads" (1870) 2358787Sru# was the result of his proposals at the Convention of Railroad Trunk Lines 2458787Sru# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 2558787Sru# but in 1872-05 he moved the proposed origin to Greenwich. 2658787Sru# His proposal was adopted by the railroads on 1883-11-18 at 12:00, 2758787Sru# and the most of the country soon followed suit. 2858787Sru 29149514Swollman# From Paul Eggert (2005-04-16): 30149514Swollman# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 31149514Swollman# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 32149514Swollman 33158421Swollman# From Paul Eggert (2006-03-22): 3414343Swollman# A good source for time zone historical data in the US is 3514343Swollman# Thomas G. Shanks, The American Atlas (5th edition), 3614343Swollman# San Diego: ACS Publications, Inc. (1991). 3714343Swollman# Make sure you have the errata sheet; the book is somewhat useless without it. 38158421Swollman# It is the source for most of the pre-1991 US entries below. 3914343Swollman 4075267Swollman# From Paul Eggert (2001-03-06): 4117200Swollman# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 42257682Sedwin# in his whimsical essay "An Economical Project for Diminishing the Cost 43257682Sedwin# of Light" published in the Journal de Paris (1784-04-26). 4417200Swollman# Not everyone is happy with the results: 4517200Swollman# 4617200Swollman# I don't really care how time is reckoned so long as there is some 4717200Swollman# agreement about it, but I object to being told that I am saving 4817200Swollman# daylight when my reason tells me that I am doing nothing of the kind. 4917200Swollman# I even object to the implication that I am wasting something 5017200Swollman# valuable if I stay in bed after the sun has risen. As an admirer 5117200Swollman# of moonlight I resent the bossy insistence of those who want to 5217200Swollman# reduce my time for enjoying it. At the back of the Daylight Saving 5317200Swollman# scheme I detect the bony, blue-fingered hand of Puritanism, eager 5417200Swollman# to push people into bed earlier, and get them up earlier, to make 5517200Swollman# them healthy, wealthy and wise in spite of themselves. 5617200Swollman# 57273438Sdelphij# -- Robertson Davies, The diary of Samuel Marchbanks, 58149514Swollman# Clarke, Irwin (1947), XIX, Sunday 5975267Swollman# 6075267Swollman# For more about the first ten years of DST in the United States, see 61273438Sdelphij# Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint 62273438Sdelphij# (Carnegie Library of Pittsburgh, 1927) 63273438Sdelphij# <http://www.clpgh.org/exhibit/dst.html>. 6475267Swollman# 6575267Swollman# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 6675267Swollman# However, DST was imposed by the Standard Time Act of 1918, which 6775267Swollman# was the first nationwide legal time standard, and apparently 6875267Swollman# time was just called "Standard Time" or "Daylight Saving Time". 6917200Swollman 702742Swollman# From Arthur David Olson: 712742Swollman# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 7219878Swollman# See, for example, the front page of the Saturday, 1974-10-26 7319878Swollman# and Sunday, 1974-10-27 editions of the Washington Post. 742742Swollman 752742Swollman# From Arthur David Olson: 762742Swollman# Before the Uniform Time Act of 1966 took effect in 1967, observance of 772742Swollman# Daylight Saving Time in the US was by local option, except during wartime. 782742Swollman 7967578Swollman# From Arthur David Olson (2000-09-25): 8067578Swollman# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 8167578Swollman# In the introduction, Oboler spoke of "Eastern Peace Time." 8267578Swollman# An AltaVista search turned up 83273438Sdelphij# <http://rowayton.org/rhs/hstaug45.html>: 8467578Swollman# "When the time is announced over the radio now, it is 'Eastern Peace 8567578Swollman# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 86273438Sdelphij# (August 1945) by way of confirmation. 8767578Swollman 88149514Swollman# From Joseph Gallant citing 8967578Swollman# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 9067578Swollman# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 9186222Swollman# to switch to London for Attlee's address, but the American people 9267578Swollman# never got to hear his speech live. According to one press account, 9367578Swollman# CBS' Bob Trout was first to announce the word of Japan's surrender, 9467578Swollman# but a few seconds later, NBC, ABC and Mutual also flashed the word 9567578Swollman# of surrender, all of whom interrupting the bells of Big Ben in 9686222Swollman# London which were to precede Mr. Attlee's speech. 9767578Swollman 98114173Swollman# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 99114173Swollman# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 100114173Swollman# 101114173Swollman# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 102114173Swollman# Any announcement from Asia would reach St. John's New York newsroom on a 103114173Swollman# wire service teletype machine, which had prescribed signals for major news. 104114173Swollman# Associated Press, for example, would ring five bells before spewing out 105114173Swollman# typed copy of an important story, and 10 bells for news "of transcendental 106114173Swollman# importance." 107114173Swollman# 108114173Swollman# On Aug. 14, stalling while talking steadily into the NBC networks' open 109114173Swollman# microphone, St. John heard five bells and waited only to hear a sixth bell, 110114173Swollman# before announcing confidently: "Ladies and gentlemen, World War II is over. 111114173Swollman# The Japanese have agreed to our surrender terms." 112114173Swollman# 113114173Swollman# He had scored a 20-second scoop on other broadcasters. 114114173Swollman 115149590Swollman# From Arthur David Olson (2005-08-22): 116149590Swollman# Paul has been careful to use the "US" rules only in those locations 117149590Swollman# that are part of the United States; this reflects the real scope of 118149590Swollman# U.S. government action. So even though the "US" rules have changed 119149590Swollman# in the latest release, other countries won't be affected. 120149590Swollman 1212742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 12275267SwollmanRule US 1918 1919 - Mar lastSun 2:00 1:00 D 1232742SwollmanRule US 1918 1919 - Oct lastSun 2:00 0 S 1242742SwollmanRule US 1942 only - Feb 9 2:00 1:00 W # War 12567578SwollmanRule US 1945 only - Aug 14 23:00u 1:00 P # Peace 1262742SwollmanRule US 1945 only - Sep 30 2:00 0 S 127149514SwollmanRule US 1967 2006 - Oct lastSun 2:00 0 S 1282742SwollmanRule US 1967 1973 - Apr lastSun 2:00 1:00 D 1292742SwollmanRule US 1974 only - Jan 6 2:00 1:00 D 1302742SwollmanRule US 1975 only - Feb 23 2:00 1:00 D 1312742SwollmanRule US 1976 1986 - Apr lastSun 2:00 1:00 D 132149514SwollmanRule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 133149514SwollmanRule US 2007 max - Mar Sun>=8 2:00 1:00 D 134149514SwollmanRule US 2007 max - Nov Sun>=1 2:00 0 S 1352742Swollman 136153761Swollman# From Arthur David Olson, 2005-12-19 137153761Swollman# We generate the files specified below to guard against old files with 138153761Swollman# obsolete information being left in the time zone binary directory. 139153761Swollman# We limit the list to names that have appeared in previous versions of 140153761Swollman# this time zone package. 141153761Swollman# We do these as separate Zones rather than as Links to avoid problems if 142153761Swollman# a particular place changes whether it observes DST. 143153761Swollman# We put these specifications here in the northamerica file both to 144153761Swollman# increase the chances that they'll actually get compiled and to 145153761Swollman# avoid the need to duplicate the US rules in another file. 146153761Swollman 147153761Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 148153761SwollmanZone EST -5:00 - EST 149153761SwollmanZone MST -7:00 - MST 150153761SwollmanZone HST -10:00 - HST 151153761SwollmanZone EST5EDT -5:00 US E%sT 152153761SwollmanZone CST6CDT -6:00 US C%sT 153153761SwollmanZone MST7MDT -7:00 US M%sT 154153761SwollmanZone PST8PDT -8:00 US P%sT 155153761Swollman 15619878Swollman# From Bob Devine (1988-01-28): 1572742Swollman# ...Alaska (and Hawaii) had the timezone names changed in 1967. 1582742Swollman# old new 1592742Swollman# Pacific Standard Time(PST) -same- 1602742Swollman# Yukon Standard Time(YST) -same- 1612742Swollman# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 1622742Swollman# Nome Standard Time (NT) Bering Standard Time (BST) 1632742Swollman# 1642742Swollman# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 1652742Swollman# The YST zone now covers nearly all of the state, AHST just part 1662742Swollman# of the Aleutian islands. No DST. 1672742Swollman 16814343Swollman# From Paul Eggert (1995-12-19): 169257682Sedwin# The tables below use 'NST', not 'NT', for Nome Standard Time. 170257682Sedwin# I invented 'CAWT' for Central Alaska War Time. 17114343Swollman 17219878Swollman# From U. S. Naval Observatory (1989-01-19): 1732742Swollman# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 1742742Swollman# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 1752742Swollman# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 1762742Swollman# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 1772742Swollman# USA MOUNTAIN 7 H BEHIND UTC DENVER 1782742Swollman# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 1792742Swollman# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 1802742Swollman# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 1812742Swollman# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 1822742Swollman# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 1832742Swollman# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 184273438Sdelphij# USA " 9 H BEHIND UTC APR 3 - OCT 30 1852742Swollman# USA HAWAII 10 H BEHIND UTC 1862742Swollman# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 1872742Swollman 18819878Swollman# From Arthur David Olson (1989-01-21): 1892742Swollman# The above dates are for 1988. 1902742Swollman# Note the "AKST" and "AKDT" abbreviations, the claim that there's 1912742Swollman# no DST in Samoa, and the claim that there is DST in Alaska and the 1922742Swollman# Aleutians. 1932742Swollman 19419878Swollman# From Arthur David Olson (1988-02-13): 1952742Swollman# Legal standard time zone names, from United States Code (1982 Edition and 1962742Swollman# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 19719878Swollman# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 1982742Swollman# took effect), as explained in sections 263 and 261: 1992742Swollman# (none) 2002742Swollman# United States standard eastern time 2012742Swollman# United States standard mountain time 2022742Swollman# United States standard central time 2032742Swollman# United States standard Pacific time 2042742Swollman# (none) 2052742Swollman# United States standard Alaska time 2062742Swollman# (none) 20719878Swollman# Next, names from 1967-04-01 until 1983-11-30 (the date for 2082742Swollman# public law 98-181): 2092742Swollman# Atlantic standard time 2102742Swollman# eastern standard time 2112742Swollman# central standard time 2122742Swollman# mountain standard time 2132742Swollman# Pacific standard time 2142742Swollman# Yukon standard time 2152742Swollman# Alaska-Hawaii standard time 2162742Swollman# Bering standard time 21719878Swollman# And after 1983-11-30: 2182742Swollman# Atlantic standard time 2192742Swollman# eastern standard time 2202742Swollman# central standard time 2212742Swollman# mountain standard time 2222742Swollman# Pacific standard time 2232742Swollman# Alaska standard time 2242742Swollman# Hawaii-Aleutian standard time 2252742Swollman# Samoa standard time 2262742Swollman# The law doesn't give abbreviations. 22714343Swollman# 22875267Swollman# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 22975267Swollman# Public law 106-564 (2000-12-23) introduced the abbreviation 23075267Swollman# "Chamorro Standard Time" for time in Guam and the Northern Marianas. 23175267Swollman# See the file "australasia". 232158421Swollman 233149514Swollman# From Arthur David Olson, 2005-08-09 234149514Swollman# The following was signed into law on 2005-08-08. 235149514Swollman# 236149514Swollman# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 237273438Sdelphij# (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 238149514Swollman# U.S.C. 260a(a)) is amended-- 239273438Sdelphij# (1) by striking "first Sunday of April" and inserting "second 240273438Sdelphij# Sunday of March"; and 241273438Sdelphij# (2) by striking "last Sunday of October" and inserting "first 242149514Swollman# Sunday of November'. 243273438Sdelphij# (b) Effective Date.--Subsection (a) shall take effect 1 year after the 244149514Swollman# date of enactment of this Act or March 1, 2007, whichever is later. 245273438Sdelphij# (c) Report to Congress.--Not later than 9 months after the effective 246149514Swollman# date stated in subsection (b), the Secretary shall report to Congress 247149514Swollman# on the impact of this section on energy consumption in the United 248149514Swollman# States. 249273438Sdelphij# (d) Right to Revert.--Congress retains the right to revert the 250149514Swollman# Daylight Saving Time back to the 2005 time schedules once the 251149514Swollman# Department study is complete. 2522742Swollman 25386222Swollman# US eastern time, represented by New York 25475267Swollman 25567578Swollman# Connecticut, Delaware, District of Columbia, most of Florida, 256149590Swollman# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 257149590Swollman# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 258114173Swollman# New Hampshire, New Jersey, New York, North Carolina, Ohio, 259114173Swollman# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 260114173Swollman# Vermont, Virginia, West Virginia 26167578Swollman 262149514Swollman# From Dave Cantor (2004-11-02): 263149514Swollman# Early this summer I had the occasion to visit the Mount Washington 264149514Swollman# Observatory weather station atop (of course!) Mount Washington [, NH].... 265149514Swollman# One of the staff members said that the station was on Eastern Standard Time 266149514Swollman# and didn't change their clocks for Daylight Saving ... so that their 267149514Swollman# reports will always have times which are 5 hours behind UTC. 268149514Swollman 269153670Swollman# From Paul Eggert (2005-08-26): 270153670Swollman# According to today's Huntsville Times 271153670Swollman# <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1> 272153670Swollman# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 273153670Swollman# in Russell County, Lanett in Chambers County and some towns in Lee County, 274153670Swollman# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 275153670Swollman# Roberts, city administrator in Phenix City. as saying "We are in the Central 276153670Swollman# time zone, but we do go by the Eastern time zone because so many people work 277158421Swollman# in Columbus." 278153670Swollman 27914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 28014343SwollmanRule NYC 1920 only - Mar lastSun 2:00 1:00 D 28114343SwollmanRule NYC 1920 only - Oct lastSun 2:00 0 S 28214343SwollmanRule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 28314343SwollmanRule NYC 1921 1954 - Sep lastSun 2:00 0 S 28414343SwollmanRule NYC 1955 1966 - Oct lastSun 2:00 0 S 28514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 286149514SwollmanZone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 28714343Swollman -5:00 US E%sT 1920 28814343Swollman -5:00 NYC E%sT 1942 28914343Swollman -5:00 US E%sT 1946 29014343Swollman -5:00 NYC E%sT 1967 29114343Swollman -5:00 US E%sT 2922742Swollman 29386222Swollman# US central time, represented by Chicago 29467578Swollman 295136638Swollman# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 296136638Swollman# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 297136638Swollman# Washington counties), Illinois, western Indiana 298114173Swollman# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 299114173Swollman# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 300114173Swollman# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 301114173Swollman# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 302114173Swollman# western Tennessee, most of Texas, Wisconsin 30367578Swollman 304158421Swollman# From Larry M. Smith (2006-04-26) re Wisconsin: 305158421Swollman# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 306158421Swollman# is currently enforced at the 01:00 time of change. Because the local 307158421Swollman# "bar time" in the state corresponds to 02:00, a number of citations 308158421Swollman# are issued for the "sale of class 'B' alcohol after prohibited 309158421Swollman# hours" within the deviated hour of this change every year.... 310169811Swollman# 311169811Swollman# From Douglas R. Bomberg (2007-03-12): 312169811Swollman# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 313169811Swollman# Statue 175 closer in synch with the US Congress' intent.... 314169811Swollman# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 315158421Swollman 31614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 31714343SwollmanRule Chicago 1920 only - Jun 13 2:00 1:00 D 31814343SwollmanRule Chicago 1920 1921 - Oct lastSun 2:00 0 S 31914343SwollmanRule Chicago 1921 only - Mar lastSun 2:00 1:00 D 32014343SwollmanRule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 32114343SwollmanRule Chicago 1922 1954 - Sep lastSun 2:00 0 S 32214343SwollmanRule Chicago 1955 1966 - Oct lastSun 2:00 0 S 32314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 324149514SwollmanZone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 32514343Swollman -6:00 US C%sT 1920 32614343Swollman -6:00 Chicago C%sT 1936 Mar 1 2:00 32714343Swollman -5:00 - EST 1936 Nov 15 2:00 32814343Swollman -6:00 Chicago C%sT 1942 32914343Swollman -6:00 US C%sT 1946 33014343Swollman -6:00 Chicago C%sT 1967 33114343Swollman -6:00 US C%sT 33286222Swollman# Oliver County, ND switched from mountain to central time on 1992-10-25. 333149514SwollmanZone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 33486222Swollman -7:00 US M%sT 1992 Oct 25 02:00 33586222Swollman -6:00 US C%sT 336158421Swollman# Morton County, ND, switched from mountain to central time on 337158421Swollman# 2003-10-26, except for the area around Mandan which was already central time. 338158421Swollman# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 339158421Swollman# Officially this switch also included part of Sioux County, and 340158421Swollman# Jones, Mellette, and Todd Counties in South Dakota; 341158421Swollman# but in practice these other counties were already observing central time. 342158421Swollman# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 343158421SwollmanZone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 344158421Swollman -7:00 US M%sT 2003 Oct 26 02:00 345158421Swollman -6:00 US C%sT 3462742Swollman 347219149Sedwin# From Josh Findley (2011-01-21): 348219149Sedwin# ...it appears that Mercer County, North Dakota, changed from the 349219149Sedwin# mountain time zone to the central time zone at the last transition from 350219149Sedwin# daylight-saving to standard time (on Nov. 7, 2010): 351219149Sedwin# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 352219149Sedwin# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 353219149Sedwin 354219149Sedwin# From Andy Lipscomb (2011-01-24): 355219149Sedwin# ...according to the Census Bureau, the largest city is Beulah (although 356219149Sedwin# it's commonly referred to as Beulah-Hazen, with Hazen being the next 357219149Sedwin# largest city in Mercer County). Google Maps places Beulah's city hall 358273438Sdelphij# at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset 359273438Sdelphij# of 6h47'07". 360219149Sedwin 361219149SedwinZone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 362219149Sedwin -7:00 US M%sT 2010 Nov 7 2:00 363219149Sedwin -6:00 US C%sT 364219149Sedwin 36586222Swollman# US mountain time, represented by Denver 36667578Swollman# 367136638Swollman# Colorado, far western Kansas, Montana, western 36886222Swollman# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 369171948Sedwin# New Mexico, southwestern North Dakota, 37075267Swollman# western South Dakota, far western Texas (El Paso County, Hudspeth County, 37175267Swollman# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 37267578Swollman# 37314343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 37414343SwollmanRule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 37514343SwollmanRule Denver 1920 only - Oct lastSun 2:00 0 S 37614343SwollmanRule Denver 1921 only - May 22 2:00 0 S 37714343SwollmanRule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 37814343SwollmanRule Denver 1965 1966 - Oct lastSun 2:00 0 S 3792742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 380149514SwollmanZone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 38115309Swollman -7:00 US M%sT 1920 38215309Swollman -7:00 Denver M%sT 1942 38315309Swollman -7:00 US M%sT 1946 38415309Swollman -7:00 Denver M%sT 1967 38515309Swollman -7:00 US M%sT 3862742Swollman 38714343Swollman# US Pacific time, represented by Los Angeles 38867578Swollman# 389136638Swollman# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 390263042Sedwin# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 391263042Sedwin# north of the Salmon River, and the towns of Burgdorf and Warren), 392263042Sedwin# Nevada (except West Wendover), Oregon (except the northern 3/4 of 393263042Sedwin# Malheur county), and Washington 39467578Swollman# 39514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 39614343SwollmanRule CA 1948 only - Mar 14 2:00 1:00 D 39714343SwollmanRule CA 1949 only - Jan 1 2:00 0 S 39814343SwollmanRule CA 1950 1966 - Apr lastSun 2:00 1:00 D 39914343SwollmanRule CA 1950 1961 - Sep lastSun 2:00 0 S 40014343SwollmanRule CA 1962 1966 - Oct lastSun 2:00 0 S 40114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 402149514SwollmanZone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 40314343Swollman -8:00 US P%sT 1946 40414343Swollman -8:00 CA P%sT 1967 40514343Swollman -8:00 US P%sT 4068029Swollman 40714343Swollman# Alaska 40814343Swollman# AK%sT is the modern abbreviation for -9:00 per USNO. 40914343Swollman# 41086222Swollman# From Paul Eggert (2001-05-30): 41114343Swollman# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 41219878Swollman# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 41375267Swollman# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 41475267Swollman# also a Friday. Include only the time zone part of this transition, 41575267Swollman# ignoring the switch from Julian to Gregorian, since we can't represent 41675267Swollman# the Julian calendar. 41714343Swollman# 41886222Swollman# As far as we know, none of the exact locations mentioned below were 41986222Swollman# permanently inhabited in 1867 by anyone using either calendar. 42086222Swollman# (Yakutat was colonized by the Russians in 1799, but the settlement 42186222Swollman# was destroyed in 1805 by a Yakutat-kon war party.) However, there 42286222Swollman# were nearby inhabitants in some cases and for our purposes perhaps 42386222Swollman# it's best to simply use the official transition. 424219411Sedwin 425273438Sdelphij# From Paul Eggert (2014-07-18): 426273438Sdelphij# One opinion of the early-1980s turmoil in Alaska over time zones and 427273438Sdelphij# daylight saving time appeared as graffiti on a Juneau airport wall: 428273438Sdelphij# "Welcome to Juneau. Please turn your watch back to the 19th century." 429273438Sdelphij# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. 430273438Sdelphij# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html 431219411Sedwin# 432273438Sdelphij# Steve Ferguson (2011-01-31) referred to the following source: 433273438Sdelphij# Norris F. Keeping time in Alaska: national directives, local response. 434273438Sdelphij# Alaska History 2001;16(1-2). 435273438Sdelphij# http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ 436219411Sedwin 437219411Sedwin# From Arthur David Olson (2011-02-01): 438219411Sedwin# Here's database-relevant material from the 2001 "Alaska History" article: 439219411Sedwin# 440219411Sedwin# On September 20 [1979]...DOT...officials decreed that on April 27, 441219411Sedwin# 1980, Juneau and other nearby communities would move to Yukon Time. 442219411Sedwin# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 443219411Sedwin# Pacific Time. 444219411Sedwin# 445219411Sedwin# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 446219411Sedwin# Department's September 1979 decision. Juneau and other communities in 447219411Sedwin# northern Southeast reverted to Pacific Time on October 26. 448219411Sedwin# 449219411Sedwin# On October 28 [1983]...the Metlakatla Indian Community Council voted 450219411Sedwin# unanimously to keep the reservation on Pacific Time. 451219411Sedwin# 452219411Sedwin# According to DOT official Joanne Petrie, Indian reservations are not 453219411Sedwin# bound to follow time zones imposed by neighboring jurisdictions. 454219411Sedwin# 455219411Sedwin# (The last is consistent with how the database now handles the Navajo 456219411Sedwin# Nation.) 457219411Sedwin 458219411Sedwin# From Arthur David Olson (2011-02-09): 459219411Sedwin# I just spoke by phone with a staff member at the Metlakatla Indian 460219411Sedwin# Community office (using contact information available at 461219411Sedwin# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 462219411Sedwin# It's shortly after 1:00 here on the east coast of the United States; 463219411Sedwin# the staffer said it was shortly after 10:00 there. When I asked whether 464273438Sdelphij# that meant they were on Pacific time, they said no - they were on their 465219411Sedwin# own time. I asked about daylight saving; they said it wasn't used. I 466219411Sedwin# did not inquire about practices in the past. 467219411Sedwin 468226298Sedwin# From Arthur David Olson (2011-08-17): 469226298Sedwin# For lack of better information, assume that Metlakatla's 470226298Sedwin# abandonment of use of daylight saving resulted from the 1983 vote. 471226298Sedwin 47214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 47375267SwollmanZone America/Juneau 15:02:19 - LMT 1867 Oct 18 47475267Swollman -8:57:41 - LMT 1900 Aug 20 12:00 47514343Swollman -8:00 - PST 1942 47614343Swollman -8:00 US P%sT 1946 47714343Swollman -8:00 - PST 1969 478219411Sedwin -8:00 US P%sT 1980 Apr 27 2:00 479240461Sedwin -9:00 US Y%sT 1980 Oct 26 2:00 48014343Swollman -8:00 US P%sT 1983 Oct 30 2:00 481136638Swollman -9:00 US Y%sT 1983 Nov 30 48214343Swollman -9:00 US AK%sT 483226298SedwinZone America/Sitka 14:58:47 - LMT 1867 Oct 18 484219411Sedwin -9:01:13 - LMT 1900 Aug 20 12:00 485219411Sedwin -8:00 - PST 1942 486219411Sedwin -8:00 US P%sT 1946 487219411Sedwin -8:00 - PST 1969 488219411Sedwin -8:00 US P%sT 1983 Oct 30 2:00 489219411Sedwin -9:00 US Y%sT 1983 Nov 30 490219411Sedwin -9:00 US AK%sT 491219411SedwinZone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 492219411Sedwin -8:46:18 - LMT 1900 Aug 20 12:00 493219411Sedwin -8:00 - PST 1942 494219411Sedwin -8:00 US P%sT 1946 495219411Sedwin -8:00 - PST 1969 496219411Sedwin -8:00 US P%sT 1983 Oct 30 2:00 497273438Sdelphij -8:00 - PST 49875267SwollmanZone America/Yakutat 14:41:05 - LMT 1867 Oct 18 49975267Swollman -9:18:55 - LMT 1900 Aug 20 12:00 50014343Swollman -9:00 - YST 1942 50114343Swollman -9:00 US Y%sT 1946 50214343Swollman -9:00 - YST 1969 503136638Swollman -9:00 US Y%sT 1983 Nov 30 50414343Swollman -9:00 US AK%sT 50575267SwollmanZone America/Anchorage 14:00:24 - LMT 1867 Oct 18 50675267Swollman -9:59:36 - LMT 1900 Aug 20 12:00 50714343Swollman -10:00 - CAT 1942 508158421Swollman -10:00 US CAT/CAWT 1945 Aug 14 23:00u 509158421Swollman -10:00 US CAT/CAPT 1946 # Peace 51014343Swollman -10:00 - CAT 1967 Apr 51114343Swollman -10:00 - AHST 1969 51214343Swollman -10:00 US AH%sT 1983 Oct 30 2:00 513136638Swollman -9:00 US Y%sT 1983 Nov 30 51414343Swollman -9:00 US AK%sT 51575267SwollmanZone America/Nome 12:58:21 - LMT 1867 Oct 18 51675267Swollman -11:01:38 - LMT 1900 Aug 20 12:00 51714343Swollman -11:00 - NST 1942 51814343Swollman -11:00 US N%sT 1946 51914343Swollman -11:00 - NST 1967 Apr 52014343Swollman -11:00 - BST 1969 52114343Swollman -11:00 US B%sT 1983 Oct 30 2:00 522136638Swollman -9:00 US Y%sT 1983 Nov 30 52314343Swollman -9:00 US AK%sT 52475267SwollmanZone America/Adak 12:13:21 - LMT 1867 Oct 18 52575267Swollman -11:46:38 - LMT 1900 Aug 20 12:00 52614343Swollman -11:00 - NST 1942 52714343Swollman -11:00 US N%sT 1946 52814343Swollman -11:00 - NST 1967 Apr 52914343Swollman -11:00 - BST 1969 53014343Swollman -11:00 US B%sT 1983 Oct 30 2:00 531136638Swollman -10:00 US AH%sT 1983 Nov 30 53214343Swollman -10:00 US HA%sT 533149514Swollman# The following switches don't quite make our 1970 cutoff. 534149514Swollman# 53514343Swollman# Shanks writes that part of southwest Alaska (e.g. Aniak) 53614343Swollman# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 53714343Swollman# and another part (e.g. Akiak) made the same switch five weeks later. 538149514Swollman# 539149514Swollman# From David Flater (2004-11-09): 540149514Swollman# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 541149514Swollman# Historic Preservation Commission, provided this information, which 542149514Swollman# suggests that Unalaska deviated from statutory time from early 1967 543149514Swollman# possibly until 1983: 544149514Swollman# 545149514Swollman# Minutes of the Unalaska City Council Meeting, January 10, 1967: 546149514Swollman# "Except for St. Paul and Akutan, Unalaska is the only important 547149514Swollman# location not on Alaska Standard Time. The following resolution was 548149514Swollman# made by William Robinson and seconded by Henry Swanson: Be it 549149514Swollman# resolved that the City of Unalaska hereby goes to Alaska Standard 550149514Swollman# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 551149514Swollman# January 14, Alaska Standard Time.) This resolution was passed with 552149514Swollman# three votes for and one against." 5532742Swollman 55414343Swollman# Hawaii 555218122Sedwin 556218122Sedwin# From Arthur David Olson (2010-12-09): 557218122Sedwin# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 558218122Sedwin# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 559218122Sedwin# the article is available at 560218122Sedwin# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 561218122Sedwin# and indicates that standard time was adopted effective noon, January 562218122Sedwin# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 563218122Sedwin# saving for the period between the last Sunday of each April and the 564218122Sedwin# last Sunday of each September, but less than a month later repealed the 565218122Sedwin# act," (page 220), that year-round daylight saving time was in effect 566218122Sedwin# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 567218122Sedwin# when clocks changed) and that clocks were changed by 30 minutes 568218122Sedwin# effective the second Sunday of June, 1947 (page 219, with no time of 569218122Sedwin# day given for when clocks changed). A footnote for the 1933 changes 570218122Sedwin# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 571218122Sedwin# and Act 163 (approved 21 May 1933)." 572218122Sedwin 573218122Sedwin# From Arthur David Olson (2011-01-19): 574218122Sedwin# The following is from "Laws of the Territory of Hawaii Passed by the 575218122Sedwin# Seventeenth Legislature: Regular Session 1933," available (as of 576218122Sedwin# 2011-01-19) at American University's Pence Law Library. Page 85: "Act 577218122Sedwin# 90...At 2 o'clock ante meridian of the last Sunday in April of each 578218122Sedwin# year, the standard time of this Territory shall be advanced one 579218122Sedwin# hour...This Act shall take effect upon its approval. Approved this 26th 580218122Sedwin# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 581218122Sedwin# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 582218122Sedwin# hereby repealed...This Act shall take effect upon its approval, upon 583218122Sedwin# which date the standard time of this Territory shall be restored to 584218122Sedwin# that existing immediately prior to the taking effect of said Act 90. 585218122Sedwin# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 586218122Sedwin# of the Territory of Hawaii." 58714343Swollman# 588218122Sedwin# Note that 1933-05-21 was a Sunday. 589218122Sedwin# We're left to guess the time of day when Act 163 was approved; guess noon. 590218122Sedwin 591218122SedwinZone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox 592218122Sedwin -10:30 - HST 1933 Apr 30 2:00 #Laws 1933 593218122Sedwin -10:30 1:00 HDT 1933 May 21 12:00 #Laws 1933+12 594218122Sedwin -10:30 - HST 1942 Feb 09 2:00 #Schmitt&Cox+2 595226298Sedwin -10:30 1:00 HDT 1945 Sep 30 2:00 #Schmitt&Cox+2 596226298Sedwin -10:30 - HST 1947 Jun 8 2:00 #Schmitt&Cox+2 59714343Swollman -10:00 - HST 5982742Swollman 599257682SedwinLink Pacific/Honolulu Pacific/Johnston 600257682Sedwin 60114343Swollman# Now we turn to US areas that have diverged from the consensus since 1970. 60214343Swollman 60314343Swollman# Arizona mostly uses MST. 604114173Swollman 605114173Swollman# From Paul Eggert (2002-10-20): 606114173Swollman# 607114173Swollman# The information in the rest of this paragraph is derived from the 608273438Sdelphij# Daylight Saving Time web page 609273438Sdelphij# <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23) 610273438Sdelphij# maintained by the Arizona State Library, Archives and Public Records. 611114173Swollman# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 612114173Swollman# time, but by federal law railroads, airlines, bus lines, military 613114173Swollman# personnel, and some engaged in interstate commerce continued to 614114173Swollman# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 615114173Swollman# Gazette says that was the date the law changed, and that 04-01 was 616114173Swollman# the date the state's clocks would change. In 1945 the State of 617114173Swollman# Arizona used standard time all year, again with exceptions only as 618114173Swollman# mandated by federal law. Arizona observed DST in 1967, but Arizona 619114173Swollman# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 620114173Swollman# 621114173Swollman# Shanks says the 1944 experiment came to an end on 1944-03-17. 622114173Swollman# Go with the Arizona State Library instead. 623114173Swollman 624149514SwollmanZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 62514343Swollman -7:00 US M%sT 1944 Jan 1 00:01 626114173Swollman -7:00 - MST 1944 Apr 1 00:01 62714343Swollman -7:00 US M%sT 1944 Oct 1 00:01 62814343Swollman -7:00 - MST 1967 629114173Swollman -7:00 US M%sT 1968 Mar 21 63014343Swollman -7:00 - MST 63119878Swollman# From Arthur David Olson (1988-02-13): 63214343Swollman# A writer from the Inter Tribal Council of Arizona, Inc., 633136638Swollman# notes in private correspondence dated 1987-12-28 that "Presently, only the 6342742Swollman# Navajo Nation participates in the Daylight Saving Time policy, due to its 6352742Swollman# large size and location in three states." (The "only" means that other 6362742Swollman# tribal nations don't use DST.) 637257682Sedwin# 638257682Sedwin# From Paul Eggert (2013-08-26): 639257682Sedwin# See America/Denver for a zone appropriate for the Navajo Nation. 6402742Swollman 641136638Swollman# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 642136638Swollman# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 643136638Swollman# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 644136638Swollman# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 645171948Sedwin# Teton, Twin Falls, Valley, Washington counties, and the southern 646171948Sedwin# quarter of Idaho county) and eastern Oregon (most of Malheur County) 647136638Swollman# switched four weeks late in 1974. 648149514Swollman# 64914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 650149514SwollmanZone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 65114343Swollman -8:00 US P%sT 1923 May 13 2:00 65214343Swollman -7:00 US M%sT 1974 65314343Swollman -7:00 - MST 1974 Feb 3 2:00 65414343Swollman -7:00 US M%sT 6552742Swollman 65614343Swollman# Indiana 65714343Swollman# 65858787Sru# For a map of Indiana's time zone regions, see: 659273438Sdelphij# What time is it in Indiana? (2006-03-01) 660273438Sdelphij# <http://www.mccsc.edu/time.html> 66158787Sru# 662171948Sedwin# From Paul Eggert (2007-08-17): 663149590Swollman# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 664149590Swollman# with the following exceptions: 665149590Swollman# 666149590Swollman# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 667273438Sdelphij# Vanderburgh, and Warrick counties have been like America/Chicago. 668149590Swollman# 669149590Swollman# - Dearborn and Ohio counties have been like America/New_York. 670149590Swollman# 671149590Swollman# - Clark, Floyd, and Harrison counties have been like 672149590Swollman# America/Kentucky/Louisville. 673149590Swollman# 674171948Sedwin# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 675171948Sedwin# and Switzerland counties have their own time zone histories as noted below. 676158421Swollman# 677158421Swollman# Shanks partitioned Indiana into 345 regions, each with its own time history, 678257682Sedwin# and wrote "Even newspaper reports present contradictory information." 679158421Swollman# Those Hoosiers! Such a flighty and changeable people! 68014343Swollman# Fortunately, most of the complexity occurred before our cutoff date of 1970. 68114343Swollman# 68214343Swollman# Other than Indianapolis, the Indiana place names are so nondescript 683257682Sedwin# that they would be ambiguous if we left them at the 'America' level. 684257682Sedwin# So we reluctantly put them all in a subdirectory 'America/Indiana'. 68575267Swollman 686149514Swollman# From Paul Eggert (2005-08-16): 687158421Swollman# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. 68875267Swollman 689273438Sdelphij# From Paul Eggert (2014-06-26): 690273438Sdelphij# https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana 691273438Sdelphij# says "DOT is relocating the time zone boundary in Indiana to move Starke, 692158421Swollman# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 693158421Swollman# Eastern Time Zone to the Central Time Zone.... The effective date of 694273438Sdelphij# this rule is 2 a.m. EST Sunday, April 2, 2006, which is the 695158421Swollman# changeover date from standard time to Daylight Saving Time." 696273438Sdelphij# Strictly speaking, this meant the affected counties changed their 697273438Sdelphij# clocks twice that night, but this obviously was in error. The intent 698273438Sdelphij# was that 01:59:59 EST be followed by 02:00:00 CDT. 699158421Swollman 700169811Swollman# From Gwillim Law (2007-02-10): 701169811Swollman# The Associated Press has been reporting that Pulaski County, Indiana is 702169811Swollman# going to switch from Central to Eastern Time on March 11, 2007.... 703169811Swollman# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 704169811Swollman 70514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 70614343SwollmanRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 70714343SwollmanRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 70814343SwollmanRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 70914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 710149514SwollmanZone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 71114343Swollman -6:00 US C%sT 1920 71214343Swollman -6:00 Indianapolis C%sT 1942 71314343Swollman -6:00 US C%sT 1946 71414343Swollman -6:00 Indianapolis C%sT 1955 Apr 24 2:00 71514343Swollman -5:00 - EST 1957 Sep 29 2:00 71614343Swollman -6:00 - CST 1958 Apr 27 2:00 71714343Swollman -5:00 - EST 1969 71814343Swollman -5:00 US E%sT 1971 719149514Swollman -5:00 - EST 2006 720149514Swollman -5:00 US E%sT 7212742Swollman# 722158421Swollman# Eastern Crawford County, Indiana, left its clocks alone in 1974, 723158421Swollman# as well as from 1976 through 2005. 72414343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 72514343SwollmanRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 72614343SwollmanRule Marengo 1951 only - Sep lastSun 2:00 0 S 72714343SwollmanRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 72814343SwollmanRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 72914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 730149514SwollmanZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 73114343Swollman -6:00 US C%sT 1951 73214343Swollman -6:00 Marengo C%sT 1961 Apr 30 2:00 73314343Swollman -5:00 - EST 1969 73414343Swollman -5:00 US E%sT 1974 Jan 6 2:00 73514343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 73614343Swollman -5:00 US E%sT 1976 737149514Swollman -5:00 - EST 2006 738149514Swollman -5:00 US E%sT 73914343Swollman# 740171948Sedwin# Daviess, Dubois, Knox, and Martin Counties, Indiana, 741171948Sedwin# switched from eastern to central time in April 2006, then switched back 742171948Sedwin# in November 2007. 743158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 744158421SwollmanRule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 745158421SwollmanRule Vincennes 1946 only - Sep lastSun 2:00 0 S 746158421SwollmanRule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 747158421SwollmanRule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 748158421SwollmanRule Vincennes 1955 only - May 1 0:00 1:00 D 749158421SwollmanRule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 750158421SwollmanRule Vincennes 1960 only - Oct lastSun 2:00 0 S 751158421SwollmanRule Vincennes 1961 only - Sep lastSun 2:00 0 S 752158421SwollmanRule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 753158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 754158421SwollmanZone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 755158421Swollman -6:00 US C%sT 1946 756158421Swollman -6:00 Vincennes C%sT 1964 Apr 26 2:00 757158421Swollman -5:00 - EST 1969 758158421Swollman -5:00 US E%sT 1971 759158421Swollman -5:00 - EST 2006 Apr 2 2:00 760171948Sedwin -6:00 US C%sT 2007 Nov 4 2:00 761171948Sedwin -5:00 US E%sT 762171948Sedwin# 763171948Sedwin# Perry County, Indiana, switched from eastern to central time in April 2006. 764171948Sedwin# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 765171948SedwinRule Perry 1946 only - Apr lastSun 2:00 1:00 D 766171948SedwinRule Perry 1946 only - Sep lastSun 2:00 0 S 767171948SedwinRule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 768171948SedwinRule Perry 1953 1959 - Sep lastSun 2:00 0 S 769171948SedwinRule Perry 1955 only - May 1 0:00 1:00 D 770171948SedwinRule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 771171948SedwinRule Perry 1960 only - Oct lastSun 2:00 0 S 772171948SedwinRule Perry 1961 only - Sep lastSun 2:00 0 S 773171948SedwinRule Perry 1962 1963 - Oct lastSun 2:00 0 S 774171948Sedwin# Zone NAME GMTOFF RULES FORMAT [UNTIL] 775171948SedwinZone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 776171948Sedwin -6:00 US C%sT 1946 777171948Sedwin -6:00 Perry C%sT 1964 Apr 26 2:00 778171948Sedwin -5:00 - EST 1969 779171948Sedwin -5:00 US E%sT 1971 780171948Sedwin -5:00 - EST 2006 Apr 2 2:00 781158421Swollman -6:00 US C%sT 782158421Swollman# 783158421Swollman# Pike County, Indiana moved from central to eastern time in 1977, 784171948Sedwin# then switched back in 2006, then switched back again in 2007. 785158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 786158421SwollmanRule Pike 1955 only - May 1 0:00 1:00 D 787158421SwollmanRule Pike 1955 1960 - Sep lastSun 2:00 0 S 788158421SwollmanRule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 789158421SwollmanRule Pike 1961 1964 - Oct lastSun 2:00 0 S 790158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 791158421SwollmanZone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 792158421Swollman -6:00 US C%sT 1955 793158421Swollman -6:00 Pike C%sT 1965 Apr 25 2:00 794158421Swollman -5:00 - EST 1966 Oct 30 2:00 795158421Swollman -6:00 US C%sT 1977 Oct 30 2:00 796158421Swollman -5:00 - EST 2006 Apr 2 2:00 797171948Sedwin -6:00 US C%sT 2007 Nov 4 2:00 798171948Sedwin -5:00 US E%sT 799158421Swollman# 800158421Swollman# Starke County, Indiana moved from central to eastern time in 1991, 801158421Swollman# then switched back in 2006. 80219878Swollman# From Arthur David Olson (1991-10-28): 80319878Swollman# An article on page A3 of the Sunday, 1991-10-27 Washington Post 80414343Swollman# notes that Starke County switched from Central time to Eastern time as of 80519878Swollman# 1991-10-27. 80614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 80714343SwollmanRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 80814343SwollmanRule Starke 1947 1954 - Sep lastSun 2:00 0 S 80914343SwollmanRule Starke 1955 1956 - Oct lastSun 2:00 0 S 81014343SwollmanRule Starke 1957 1958 - Sep lastSun 2:00 0 S 81114343SwollmanRule Starke 1959 1961 - Oct lastSun 2:00 0 S 81214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 813149514SwollmanZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 81414343Swollman -6:00 US C%sT 1947 81514343Swollman -6:00 Starke C%sT 1962 Apr 29 2:00 81614343Swollman -5:00 - EST 1963 Oct 27 2:00 81714343Swollman -6:00 US C%sT 1991 Oct 27 2:00 818158421Swollman -5:00 - EST 2006 Apr 2 2:00 819158421Swollman -6:00 US C%sT 82014343Swollman# 821169811Swollman# Pulaski County, Indiana, switched from eastern to central time in 822169811Swollman# April 2006 and then switched back in March 2007. 823169811Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 824169811SwollmanRule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 825169811SwollmanRule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 826169811SwollmanRule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 827169811SwollmanRule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 828169811Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 829169811SwollmanZone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 830169811Swollman -6:00 US C%sT 1946 831169811Swollman -6:00 Pulaski C%sT 1961 Apr 30 2:00 832169811Swollman -5:00 - EST 1969 833169811Swollman -5:00 US E%sT 1971 834169811Swollman -5:00 - EST 2006 Apr 2 2:00 835169811Swollman -6:00 US C%sT 2007 Mar 11 2:00 836169811Swollman -5:00 US E%sT 837169811Swollman# 838158421Swollman# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 83914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 840149514SwollmanZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 84114343Swollman -6:00 US C%sT 1954 Apr 25 2:00 84214343Swollman -5:00 - EST 1969 84314343Swollman -5:00 US E%sT 1973 844149514Swollman -5:00 - EST 2006 845149514Swollman -5:00 US E%sT 8462742Swollman 84714343Swollman# Part of Kentucky left its clocks alone in 1974. 848149590Swollman# This also includes Clark, Floyd, and Harrison counties in Indiana. 84914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 85014343SwollmanRule Louisville 1921 only - May 1 2:00 1:00 D 85114343SwollmanRule Louisville 1921 only - Sep 1 2:00 0 S 85214343SwollmanRule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 85314343SwollmanRule Louisville 1941 only - Sep lastSun 2:00 0 S 85414343SwollmanRule Louisville 1946 only - Jun 2 2:00 0 S 85514343SwollmanRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 85614343SwollmanRule Louisville 1956 1960 - Oct lastSun 2:00 0 S 85714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 858149514SwollmanZone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 85914343Swollman -6:00 US C%sT 1921 86014343Swollman -6:00 Louisville C%sT 1942 86114343Swollman -6:00 US C%sT 1946 86214343Swollman -6:00 Louisville C%sT 1961 Jul 23 2:00 86314343Swollman -5:00 - EST 1968 86414343Swollman -5:00 US E%sT 1974 Jan 6 2:00 86514343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 86614343Swollman -5:00 US E%sT 86767578Swollman# 868158421Swollman# Wayne County, Kentucky 86958787Sru# 870273438Sdelphij# From Lake Cumberland LIFE 871273438Sdelphij# <http://www.lake-cumberland.com/life/archive/news990129time.shtml> 872273438Sdelphij# (1999-01-29) via WKYM-101.7: 87358787Sru# Clinton County has joined Wayne County in asking the DoT to change from 87458787Sru# the Central to the Eastern time zone.... The Wayne County government made 87558787Sru# the same request in December. And while Russell County officials have not 87658787Sru# taken action, the majority of respondents to a poll conducted there in 87758787Sru# August indicated they would like to change to "fast time" also. 87858787Sru# The three Lake Cumberland counties are the farthest east of any U.S. 87958787Sru# location in the Central time zone. 88067578Swollman# 88167578Swollman# From Rich Wales (2000-08-29): 88267578Swollman# After prolonged debate, and despite continuing deep differences of opinion, 88367578Swollman# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 88475267Swollman# (-0500) time. They won't "fall back" this year. See Sara Shipley, 88575267Swollman# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 88686222Swollman# 88786222Swollman# From Paul Eggert (2001-07-16): 88886222Swollman# The final rule was published in the 889273438Sdelphij# Federal Register 65, 160 (2000-08-17), pp 50154-50158. 890273438Sdelphij# <http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22> 891114173Swollman# 892149514SwollmanZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 89367578Swollman -6:00 US C%sT 1946 89467578Swollman -6:00 - CST 1968 89567578Swollman -6:00 US C%sT 2000 Oct 29 2:00 89667578Swollman -5:00 US E%sT 8972742Swollman 89867578Swollman 89967578Swollman# From Rives McDow (2000-08-30): 90067578Swollman# Here ... are all the changes in the US since 1985. 90167578Swollman# Kearny County, KS (put all of county on central; 90267578Swollman# previously split between MST and CST) ... 1990-10 90367578Swollman# Starke County, IN (from CST to EST) ... 1991-10 90467578Swollman# Oliver County, ND (from MST to CST) ... 1992-10 90567578Swollman# West Wendover, NV (from PST TO MST) ... 1999-10 90667578Swollman# Wayne County, KY (from CST to EST) ... 2000-10 90767578Swollman# 90886222Swollman# From Paul Eggert (2001-07-17): 90986222Swollman# We don't know where the line used to be within Kearny County, KS, 91086222Swollman# so omit that change for now. 91186222Swollman# See America/Indiana/Knox for the Starke County, IN change. 91286222Swollman# See America/North_Dakota/Center for the Oliver County, ND change. 91386222Swollman# West Wendover, NV officially switched from Pacific to mountain time on 91486222Swollman# 1999-10-31. See the 915273438Sdelphij# Federal Register 64, 203 (1999-10-21), pp 56705-56707. 916273438Sdelphij# <http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15> 91786222Swollman# However, the Federal Register says that West Wendover already operated 91886222Swollman# on mountain time, and the rule merely made this official; 91986222Swollman# hence a separate tz entry is not needed. 92067578Swollman 92114343Swollman# Michigan 92214343Swollman# 92319878Swollman# From Bob Devine (1988-01-28): 92414343Swollman# Michigan didn't observe DST from 1968 to 1973. 92514343Swollman# 92658787Sru# From Paul Eggert (1999-03-31): 92758787Sru# Shanks writes that Michigan started using standard time on 1885-09-18, 92858787Sru# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 92958787Sru# that Detroit kept 93014343Swollman# 93114343Swollman# local time until 1900 when the City Council decreed that clocks should 93214343Swollman# be put back twenty-eight minutes to Central Standard Time. Half the 93314343Swollman# city obeyed, half refused. After considerable debate, the decision 93414343Swollman# was rescinded and the city reverted to Sun time. A derisive offer to 93514343Swollman# erect a sundial in front of the city hall was referred to the 93614343Swollman# Committee on Sewers. Then, in 1905, Central time was adopted 93714343Swollman# by city vote. 93814343Swollman# 93914343Swollman# This story is too entertaining to be false, so go with Howse over Shanks. 94014343Swollman# 94175267Swollman# From Paul Eggert (2001-03-06): 942257682Sedwin# Garland (1927) writes "Cleveland and Detroit advanced their clocks 943257682Sedwin# one hour in 1914." This change is not in Shanks. We have no more 94475267Swollman# info, so omit this for now. 94575267Swollman# 94614343Swollman# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 94714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 94814343SwollmanRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 94914343SwollmanRule Detroit 1948 only - Sep lastSun 2:00 0 S 95014343SwollmanRule Detroit 1967 only - Jun 14 2:00 1:00 D 95114343SwollmanRule Detroit 1967 only - Oct lastSun 2:00 0 S 95214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 95314343SwollmanZone America/Detroit -5:32:11 - LMT 1905 95414343Swollman -6:00 - CST 1915 May 15 2:00 95514343Swollman -5:00 - EST 1942 95614343Swollman -5:00 US E%sT 1946 95714343Swollman -5:00 Detroit E%sT 1973 95814343Swollman -5:00 US E%sT 1975 95914343Swollman -5:00 - EST 1975 Apr 27 2:00 96014343Swollman -5:00 US E%sT 96114343Swollman# 962158421Swollman# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 963158421Swollman# switched from EST to CST/CDT in 1973. 96414343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 96514343SwollmanRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 96614343SwollmanRule Menominee 1946 only - Sep lastSun 2:00 0 S 96714343SwollmanRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 96814343SwollmanRule Menominee 1966 only - Oct lastSun 2:00 0 S 96914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 97014343SwollmanZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 97114343Swollman -6:00 US C%sT 1946 97214343Swollman -6:00 Menominee C%sT 1969 Apr 27 2:00 97314343Swollman -5:00 - EST 1973 Apr 29 2:00 97414343Swollman -6:00 US C%sT 97514343Swollman 9762742Swollman# Navassa 97786222Swollman# administered by the US Fish and Wildlife Service 97843543Swollman# claimed by US under the provisions of the 1856 Guano Islands Act 97943543Swollman# also claimed by Haiti 98043543Swollman# occupied 1857/1900 by the Navassa Phosphate Co 98186222Swollman# US lighthouse 1917/1996-09 98243543Swollman# currently uninhabited 983257682Sedwin# see Mark Fineman, "An Isle Rich in Guano and Discord", 98443543Swollman# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 98543543Swollman# Jimmy Skaggs, _The Great Guano Rush_ (1994). 98614343Swollman 9872742Swollman################################################################################ 9882742Swollman 9892742Swollman 990158421Swollman# From Paul Eggert (2006-03-22): 991158421Swollman# A good source for time zone historical data outside the U.S. is 992158421Swollman# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 993158421Swollman# San Diego: ACS Publications, Inc. (2003). 9942742Swollman# 99586222Swollman# Gwillim Law writes that a good source 99620094Swollman# for recent time zone data is the International Air Transport 99720094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 99820094Swollman# published semiannually. Law sent in several helpful summaries 99920094Swollman# of the IATA's data after 1990. 100020094Swollman# 1001158421Swollman# Except where otherwise noted, Shanks & Pottenger is the source for 1002158421Swollman# entries through 1990, and IATA SSIM is the source for entries afterwards. 100320094Swollman# 1004121098Swollman# Other sources occasionally used include: 10052742Swollman# 1006121098Swollman# Edward W. Whitman, World Time Differences, 1007121098Swollman# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1008121098Swollman# which I found in the UCLA library. 1009121098Swollman# 1010121098Swollman# William Willett, The Waste of Daylight, 19th edition 1011267489Sedwin# <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf> 1012267489Sedwin# [PDF] (1914-03) 1013121098Swollman# 1014248310Sedwin# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1015248310Sedwin# <http://www.jstor.org/stable/1774359>. 1016248310Sedwin# 1017257682Sedwin# See the 'europe' file for Greenland. 10182742Swollman 10192742Swollman# Canada 10202742Swollman 1021273438Sdelphij# From Alain LaBont�� (1994-11-14): 10229908Swollman# I post here the time zone abbreviations standardized in Canada 10239908Swollman# for both English and French in the CAN/CSA-Z234.4-89 standard.... 10249908Swollman# 1025273438Sdelphij# UTC Standard time Daylight saving time 10269908Swollman# offset French English French English 10279908Swollman# -2:30 - - HAT NDT 10289908Swollman# -3 - - HAA ADT 10299908Swollman# -3:30 HNT NST - - 10309908Swollman# -4 HNA AST HAE EDT 10319908Swollman# -5 HNE EST HAC CDT 10329908Swollman# -6 HNC CST HAR MDT 10339908Swollman# -7 HNR MST HAP PDT 10349908Swollman# -8 HNP PST HAY YDT 10359908Swollman# -9 HNY YST - - 10369908Swollman# 10379908Swollman# HN: Heure Normale ST: Standard Time 1038273438Sdelphij# HA: Heure Avanc��e DT: Daylight saving Time 10399908Swollman# 10409908Swollman# A: de l'Atlantique Atlantic 10419908Swollman# C: du Centre Central 10429908Swollman# E: de l'Est Eastern 10439908Swollman# M: Mountain 10449908Swollman# N: Newfoundland 10459908Swollman# P: du Pacifique Pacific 10469908Swollman# R: des Rocheuses 10479908Swollman# T: de Terre-Neuve 10489908Swollman# Y: du Yukon Yukon 10499908Swollman# 1050149514Swollman# From Paul Eggert (1994-11-22): 10519908Swollman# Alas, this sort of thing must be handled by localization software. 10522742Swollman 1053158421Swollman# Unless otherwise specified, the data for Canada are all from Shanks 1054158421Swollman# & Pottenger. 10559908Swollman 1056169811Swollman# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1057169811Swollman# 2007-03-01): 1058158421Swollman# The British Columbia government announced yesterday that it will 1059158421Swollman# adjust daylight savings next year to align with changes in the 1060158421Swollman# U.S. and the rest of Canada.... 1061158421Swollman# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1062169811Swollman# ... 1063169811Swollman# Nova Scotia 1064163302Sru# Daylight saving time will be extended by four weeks starting in 2007.... 1065169811Swollman# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1066169811Swollman# 1067163302Sru# [For New Brunswick] the new legislation dictates that the time change is to 1068163302Sru# be done at 02:00 instead of 00:01. 1069163302Sru# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1070163302Sru# ... 1071163302Sru# Manitoba has traditionally changed the clock every fall at 03:00. 1072163302Sru# As of 2006, the transition is to take place one hour earlier at 02:00. 1073163302Sru# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1074163302Sru# ... 1075163302Sru# [Alberta, Ontario, Quebec] will follow US rules. 1076169811Swollman# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1077163302Sru# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1078169811Swollman# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1079163302Sru# ... 1080169811Swollman# P.E.I. will follow US rules.... 1081169811Swollman# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1082163302Sru# ... 1083169811Swollman# Province of Newfoundland and Labrador.... 1084169811Swollman# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1085163302Sru# ... 1086169811Swollman# Yukon 1087169811Swollman# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1088169811Swollman# ... 1089163302Sru# N.W.T. will follow US rules. Whoever maintains the government web site 1090163302Sru# does not seem to believe in bookmarks. To see the news release, click the 1091163302Sru# following link and search for "Daylight Savings Time Change". Press the 1092163302Sru# "Daylight Savings Time Change" link; it will fire off a popup using 1093163302Sru# JavaScript. 1094163302Sru# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1095169811Swollman# ... 1096169811Swollman# Nunavut 1097169811Swollman# An amendment to the Interpretation Act was registered on February 19/2007.... 1098169811Swollman# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1099163302Sru 1100158421Swollman# From Paul Eggert (2006-04-25): 110167578Swollman# H. David Matthews and Mary Vincent's map 110267578Swollman# "It's about TIME", _Canadian Geographic_ (September-October 1998) 1103273438Sdelphij# <http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp> 1104273438Sdelphij# contains detailed boundaries for regions observing nonstandard 110567578Swollman# time and daylight saving time arrangements in Canada circa 1998. 110667578Swollman# 1107273438Sdelphij# INMS, the Institute for National Measurement Standards in Ottawa, has 110867578Swollman# information about standard and daylight saving time zones in Canada. 1109273438Sdelphij# <http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php> 1110273438Sdelphij# (updated periodically). 111167578Swollman# Its unofficial information is often taken from Matthews and Vincent. 11129908Swollman 1113163302Sru# From Paul Eggert (2006-06-27): 1114163302Sru# For now, assume all of DST-observing Canada will fall into line with the 1115163302Sru# new US DST rules, 1116163302Sru 1117233447Sedwin# From Chris Walton (2011-12-01) 1118233447Sedwin# In the first of Tammy Hardwick's articles 1119233447Sedwin# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1120233447Sedwin# she quotes the Friday November 1/1918 edition of the Creston Review. 1121233447Sedwin# The quote includes these two statements: 1122233447Sedwin# 'Sunday the CPR went back to the old system of time...' 1123233447Sedwin# '... The daylight saving scheme was dropped all over Canada at the same time,' 1124233447Sedwin# These statements refer to a transition from daylight time to standard time 1125233447Sedwin# that occurred nationally on Sunday October 27/1918. This transition was 1126233447Sedwin# also documented in the Saturday October 26/1918 edition of the Toronto Star. 1127233447Sedwin 1128233447Sedwin# In light of that evidence, we alter the date from the earlier believed 1129233447Sedwin# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1130233447Sedwin# than Thursday) in all Canadian rulesets. 1131233447Sedwin 11322742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 113317200SwollmanRule Canada 1918 only - Apr 14 2:00 1:00 D 1134233447SedwinRule Canada 1918 only - Oct 27 2:00 0 S 1135121098SwollmanRule Canada 1942 only - Feb 9 2:00 1:00 W # War 1136121098SwollmanRule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 113717200SwollmanRule Canada 1945 only - Sep 30 2:00 0 S 113817200SwollmanRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1139153761SwollmanRule Canada 1974 2006 - Oct lastSun 2:00 0 S 1140153761SwollmanRule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1141153761SwollmanRule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1142153761SwollmanRule Canada 2007 max - Nov Sun>=1 2:00 0 S 114317200Swollman 114417200Swollman 1145163302Sru# Newfoundland and Labrador 114617200Swollman 114767578Swollman# From Paul Eggert (2000-10-02): 114867578Swollman# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 114967578Swollman# but the only part of Labrador that follows the rules is the 115067578Swollman# southeast corner, including Port Hope Simpson and Mary's Harbour, 115167578Swollman# but excluding, say, Black Tickle. 115267578Swollman 115317200Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1154121098SwollmanRule StJohns 1917 only - Apr 8 2:00 1:00 D 11552742SwollmanRule StJohns 1917 only - Sep 17 2:00 0 S 1156158421Swollman# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 11572742SwollmanRule StJohns 1919 only - May 5 23:00 1:00 D 11582742SwollmanRule StJohns 1919 only - Aug 12 23:00 0 S 1159158421Swollman# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 11602742SwollmanRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 11612742SwollmanRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1162158421Swollman# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1163158421Swollman# Pottenger. 1164121098SwollmanRule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1165121098SwollmanRule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1166121098Swollman# Whitman gives the following transitions: 1167121098Swollman# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1168158421Swollman# but go with Shanks & Pottenger and assume they used Canadian rules. 11692742Swollman# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1170158421Swollman# Apr 30 - Sep 24; go with Shanks & Pottenger. 11712742SwollmanRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 11722742SwollmanRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 11732742SwollmanRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 11742742SwollmanRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 117567578SwollmanRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 117667578Swollman# From Paul Eggert (2000-10-02): 117767578Swollman# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 117867578Swollman# at 00:01 local time. For now, assume it started in 1987. 1179226298Sedwin 1180226298Sedwin# From Michael Pelley (2011-09-12): 1181226298Sedwin# We received today, Monday, September 12, 2011, notification that the 1182226298Sedwin# changes to the Newfoundland Standard Time Act have been proclaimed. 1183226298Sedwin# The change in the Act stipulates that the change from Daylight Savings 1184226298Sedwin# Time to Standard Time and from Standard Time to Daylight Savings Time 1185226298Sedwin# now occurs at 2:00AM. 1186226298Sedwin# ... 1187226298Sedwin# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1188226298Sedwin# ... 1189226298Sedwin# MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1190226298Sedwin# Office of the Chief Information Officer 1191226298Sedwin# Executive Council 1192226298Sedwin# Government of Newfoundland & Labrador 1193226298Sedwin 119467578SwollmanRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1195158421SwollmanRule StJohns 1987 2006 - Oct lastSun 0:01 0 S 119667578SwollmanRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1197158421SwollmanRule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1198226298SedwinRule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1199226298SedwinRule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1200158421Swollman# 12012742Swollman# St John's has an apostrophe, but Posix file names can't have apostrophes. 12022742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 12032742SwollmanZone America/St_Johns -3:30:52 - LMT 1884 1204121098Swollman -3:30:52 StJohns N%sT 1918 1205121098Swollman -3:30:52 Canada N%sT 1919 120620094Swollman -3:30:52 StJohns N%sT 1935 Mar 30 1207121098Swollman -3:30 StJohns N%sT 1942 May 11 1208121098Swollman -3:30 Canada N%sT 1946 1209226298Sedwin -3:30 StJohns N%sT 2011 Nov 1210226298Sedwin -3:30 Canada N%sT 12112742Swollman 121267578Swollman# most of east Labrador 121317200Swollman 1214257682Sedwin# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 121520094Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 121620094SwollmanZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1217121098Swollman -3:30:52 - NST 1918 1218121098Swollman -3:30:52 Canada N%sT 1919 121920094Swollman -3:30:52 - NST 1935 Mar 30 122020094Swollman -3:30 - NST 1936 1221121098Swollman -3:30 StJohns N%sT 1942 May 11 1222121098Swollman -3:30 Canada N%sT 1946 122320094Swollman -3:30 StJohns N%sT 1966 Mar 15 2:00 1224226298Sedwin -4:00 StJohns A%sT 2011 Nov 1225226298Sedwin -4:00 Canada A%sT 122620094Swollman 122720094Swollman 1228158421Swollman# west Labrador, Nova Scotia, Prince Edward I 122920094Swollman 1230158421Swollman# From Paul Eggert (2006-03-22): 1231158421Swollman# Shanks & Pottenger write that since 1970 most of this region has been like 1232158421Swollman# Halifax. Many locales did not observe peacetime DST until 1972; 123317200Swollman# Glace Bay, NS is the largest that we know of. 1234158421Swollman# Shanks & Pottenger also write that Liverpool, NS was the only town 1235158421Swollman# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1236158421Swollman# this is a typo. 123717200Swollman 12382742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1239158421SwollmanRule Halifax 1916 only - Apr 1 0:00 1:00 D 1240158421SwollmanRule Halifax 1916 only - Oct 1 0:00 0 S 1241158421SwollmanRule Halifax 1920 only - May 9 0:00 1:00 D 1242158421SwollmanRule Halifax 1920 only - Aug 29 0:00 0 S 1243158421SwollmanRule Halifax 1921 only - May 6 0:00 1:00 D 1244158421SwollmanRule Halifax 1921 1922 - Sep 5 0:00 0 S 1245158421SwollmanRule Halifax 1922 only - Apr 30 0:00 1:00 D 1246158421SwollmanRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1247158421SwollmanRule Halifax 1923 only - Sep 4 0:00 0 S 1248158421SwollmanRule Halifax 1924 only - Sep 15 0:00 0 S 1249158421SwollmanRule Halifax 1925 only - Sep 28 0:00 0 S 1250158421SwollmanRule Halifax 1926 only - May 16 0:00 1:00 D 1251158421SwollmanRule Halifax 1926 only - Sep 13 0:00 0 S 1252158421SwollmanRule Halifax 1927 only - May 1 0:00 1:00 D 1253158421SwollmanRule Halifax 1927 only - Sep 26 0:00 0 S 1254158421SwollmanRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1255158421SwollmanRule Halifax 1928 only - Sep 9 0:00 0 S 1256158421SwollmanRule Halifax 1929 only - Sep 3 0:00 0 S 1257158421SwollmanRule Halifax 1930 only - Sep 15 0:00 0 S 1258158421SwollmanRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1259158421SwollmanRule Halifax 1932 only - May 1 0:00 1:00 D 1260158421SwollmanRule Halifax 1933 only - Apr 30 0:00 1:00 D 1261158421SwollmanRule Halifax 1933 only - Oct 2 0:00 0 S 1262158421SwollmanRule Halifax 1934 only - May 20 0:00 1:00 D 1263158421SwollmanRule Halifax 1934 only - Sep 16 0:00 0 S 1264158421SwollmanRule Halifax 1935 only - Jun 2 0:00 1:00 D 1265158421SwollmanRule Halifax 1935 only - Sep 30 0:00 0 S 1266158421SwollmanRule Halifax 1936 only - Jun 1 0:00 1:00 D 1267158421SwollmanRule Halifax 1936 only - Sep 14 0:00 0 S 1268158421SwollmanRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1269158421SwollmanRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1270158421SwollmanRule Halifax 1939 only - May 28 0:00 1:00 D 1271158421SwollmanRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1272158421SwollmanRule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1273158421SwollmanRule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1274158421SwollmanRule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1275158421SwollmanRule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1276158421SwollmanRule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1277158421SwollmanRule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1278158421SwollmanRule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1279158421SwollmanRule Halifax 1962 1973 - Oct lastSun 2:00 0 S 12802742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 12812742SwollmanZone America/Halifax -4:14:24 - LMT 1902 Jun 15 1282121098Swollman -4:00 Halifax A%sT 1918 1283121098Swollman -4:00 Canada A%sT 1919 1284121098Swollman -4:00 Halifax A%sT 1942 Feb 9 2:00s 1285121098Swollman -4:00 Canada A%sT 1946 1286121098Swollman -4:00 Halifax A%sT 1974 1287121098Swollman -4:00 Canada A%sT 128817200SwollmanZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 128917200Swollman -4:00 Canada A%sT 1953 129017200Swollman -4:00 Halifax A%sT 1954 129117200Swollman -4:00 - AST 1972 1292121098Swollman -4:00 Halifax A%sT 1974 1293121098Swollman -4:00 Canada A%sT 12942742Swollman 1295158421Swollman# New Brunswick 12968029Swollman 1297169811Swollman# From Paul Eggert (2007-01-31): 1298169811Swollman# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1299169811Swollman# says they changed at 00:01 through 2006, and 1300158421Swollman# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1301169811Swollman# clear that this was the case since at least 1993. 1302163302Sru# For now, assume it started in 1993. 1303158421Swollman 1304158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1305158421SwollmanRule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1306158421SwollmanRule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1307158421SwollmanRule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1308158421SwollmanRule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1309158421SwollmanRule Moncton 1939 only - May 27 1:00 1:00 D 1310158421SwollmanRule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1311158421SwollmanRule Moncton 1940 only - May 19 1:00 1:00 D 1312158421SwollmanRule Moncton 1941 only - May 4 1:00 1:00 D 1313158421SwollmanRule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1314158421SwollmanRule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1315158421SwollmanRule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1316158421SwollmanRule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1317158421SwollmanRule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1318158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1319158421SwollmanZone America/Moncton -4:19:08 - LMT 1883 Dec 9 1320158421Swollman -5:00 - EST 1902 Jun 15 1321158421Swollman -4:00 Canada A%sT 1933 1322158421Swollman -4:00 Moncton A%sT 1942 1323158421Swollman -4:00 Canada A%sT 1946 1324158421Swollman -4:00 Moncton A%sT 1973 1325158421Swollman -4:00 Canada A%sT 1993 1326163302Sru -4:00 Moncton A%sT 2007 1327163302Sru -4:00 Canada A%sT 1328158421Swollman 1329163302Sru# Quebec 133017200Swollman 1331257682Sedwin# From Paul Eggert (2013-08-30): 1332257682Sedwin# Since 1970 most of Quebec has been like Toronto. 1333257682Sedwin# However, because earlier versions of the tz database mistakenly relied on data 1334257682Sedwin# from Shanks & Pottenger saying that Quebec differed from Ontario after 1970, 1335257682Sedwin# a separate entry was created for most of Quebec. We're loath to lose 1336257682Sedwin# its pre-1970 info, even though the tz database is normally limited to 1337257682Sedwin# zones that differ after 1970, so keep this otherwise out-of-scope entry. 1338163302Sru 1339163302Sru# Matthews and Vincent (1998) also write that Quebec east of the -63 1340163302Sru# meridian is supposed to observe AST, but residents as far east as 1341163302Sru# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1342257682Sedwin# The Quebec department of justice writes in 1343273438Sdelphij# "The situation in Minganie and Basse-C��te-Nord" 1344257682Sedwin# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm 1345257682Sedwin# that the coastal strip from just east of Natashquan to Blanc-Sablon 1346257682Sedwin# observes Atlantic standard time all year round. 1347257682Sedwin# http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en 1348163302Sru# says this common practice was codified into law as of 2007. 1349163302Sru# For lack of better info, guess this practice began around 1970, contra to 1350163302Sru# Shanks & Pottenger who have this region observing AST/ADT. 1351163302Sru 1352163302Sru# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1353163302SruRule Mont 1917 only - Mar 25 2:00 1:00 D 1354163302SruRule Mont 1917 only - Apr 24 0:00 0 S 1355163302SruRule Mont 1919 only - Mar 31 2:30 1:00 D 1356163302SruRule Mont 1919 only - Oct 25 2:30 0 S 1357163302SruRule Mont 1920 only - May 2 2:30 1:00 D 1358163302SruRule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 1359163302SruRule Mont 1921 only - May 1 2:00 1:00 D 1360163302SruRule Mont 1922 only - Apr 30 2:00 1:00 D 1361163302SruRule Mont 1924 only - May 17 2:00 1:00 D 1362163302SruRule Mont 1924 1926 - Sep lastSun 2:30 0 S 1363163302SruRule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1364163302Sru# The 1927-to-1937 rules can be expressed more simply as 1365163302Sru# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1366163302Sru# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 1367163302Sru# The rules below avoid use of 24:00 1368163302Sru# (which pre-1998 versions of zic cannot handle). 1369163302SruRule Mont 1927 only - May 1 0:00 1:00 D 1370163302SruRule Mont 1927 1932 - Sep lastSun 0:00 0 S 1371163302SruRule Mont 1928 1931 - Apr lastSun 0:00 1:00 D 1372163302SruRule Mont 1932 only - May 1 0:00 1:00 D 1373163302SruRule Mont 1933 1940 - Apr lastSun 0:00 1:00 D 1374163302SruRule Mont 1933 only - Oct 1 0:00 0 S 1375163302SruRule Mont 1934 1939 - Sep lastSun 0:00 0 S 1376163302SruRule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 1377163302SruRule Mont 1945 1948 - Sep lastSun 2:00 0 S 1378163302SruRule Mont 1949 1950 - Oct lastSun 2:00 0 S 1379163302SruRule Mont 1951 1956 - Sep lastSun 2:00 0 S 1380163302SruRule Mont 1957 1973 - Oct lastSun 2:00 0 S 1381163302Sru 1382163302Sru# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1383163302SruZone America/Blanc-Sablon -3:48:28 - LMT 1884 1384163302Sru -4:00 Canada A%sT 1970 1385163302Sru -4:00 - AST 1386163302SruZone America/Montreal -4:54:16 - LMT 1884 1387163302Sru -5:00 Mont E%sT 1918 1388163302Sru -5:00 Canada E%sT 1919 1389163302Sru -5:00 Mont E%sT 1942 Feb 9 2:00s 1390163302Sru -5:00 Canada E%sT 1946 1391163302Sru -5:00 Mont E%sT 1974 1392163302Sru -5:00 Canada E%sT 1393163302Sru 1394163302Sru# Ontario 1395163302Sru 1396163302Sru# From Paul Eggert (2006-07-09): 1397163302Sru# Shanks & Pottenger write that since 1970 most of Ontario has been like 1398163302Sru# Toronto. 139917200Swollman# Thunder Bay skipped DST in 1973. 140017200Swollman# Many smaller locales did not observe peacetime DST until 1974; 140117200Swollman# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 140217200Swollman# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 140317200Swollman 1404121098Swollman# From Mark Brader (2003-07-26): 1405121098Swollman# [According to the Toronto Star] Orillia, Ontario, adopted DST 1406121098Swollman# effective Saturday, 1912-06-22, 22:00; the article mentions that 1407121098Swollman# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1408121098Swollman# have already done so. In Orillia DST was to run until Saturday, 1409121098Swollman# 1912-08-31 (no time mentioned), but it was met with considerable 1410121098Swollman# hostility from certain segments of the public, and was revoked after 1411273438Sdelphij# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but 1412121098Swollman# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1413121098Swollman# earlier in June). 1414121098Swollman# 1415121098Swollman# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1416121098Swollman 141743014Swollman# From Paul Eggert (1997-10-17): 1418121098Swollman# Mark Brader writes that an article in the 1997-10-14 Toronto Star 141943014Swollman# says that Atikokan, Ontario currently does not observe DST, 142043014Swollman# but will vote on 11-10 whether to use EST/EDT. 1421273438Sdelphij# He also writes that the Ontario Time Act (1990, Chapter T.9) 1422273438Sdelphij# <http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html> 142343014Swollman# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 142443014Swollman# Officially Atikokan is therefore on CST/CDT, and most likely this report 142543014Swollman# concerns a non-official time observed as a matter of local practice. 1426158421Swollman# 142767578Swollman# From Paul Eggert (2000-10-02): 142867578Swollman# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 142967578Swollman# New Osnaburgh observe CST all year, that Big Trout Lake observes 143067578Swollman# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 143167578Swollman# violation of the official Ontario rules. 1432163302Sru# 1433163302Sru# From Paul Eggert (2006-07-09): 1434163302Sru# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1435163302Sru# 2005-07-21 Chronicle-Journal, which said: 1436163302Sru# 1437163302Sru# The clocks in Atikokan stay set on standard time year-round. 1438163302Sru# This means they spend about half the time on central time and 1439163302Sru# the other half on eastern time. 1440163302Sru# 1441163302Sru# For the most part, the system works, Mayor Dennis Brown said. 1442163302Sru# 1443163302Sru# "The majority of businesses in Atikokan deal more with Eastern 1444163302Sru# Canada, but there are some that deal with Western Canada," he 1445163302Sru# said. "I don't see any changes happening here." 1446163302Sru# 1447163302Sru# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1448163302Sru# [New Osnaburgh] follow the same practice." 144967578Swollman 1450163302Sru# From Garry McKinnon (2006-07-14) via Chris Walton: 1451163302Sru# I chatted with a member of my board who has an outstanding memory 1452163302Sru# and a long history in Atikokan (and in the telecom industry) and he 1453163302Sru# can say for certain that Atikokan has been practicing the current 1454163302Sru# time keeping since 1952, at least. 1455163302Sru 1456163302Sru# From Paul Eggert (2006-07-17): 1457163302Sru# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1458163302Sru# ever since standard time was introduced, but the information from 1459163302Sru# McKinnon sounds more authoritative. For now, assume that Atikokan 1460163302Sru# switched to EST immediately after WWII era daylight saving time 1461163302Sru# ended. This matches the old (less-populous) America/Coral_Harbour 1462163302Sru# entry since our cutoff date of 1970, so we can move 1463163302Sru# America/Coral_Harbour to the 'backward' file. 1464163302Sru 1465210718Sedwin# From Mark Brader (2010-03-06): 1466210718Sedwin# 1467210718Sedwin# Currently the database has: 1468210718Sedwin# 1469210718Sedwin# # Ontario 1470210718Sedwin# 1471210718Sedwin# # From Paul Eggert (2006-07-09): 1472210718Sedwin# # Shanks & Pottenger write that since 1970 most of Ontario has been like 1473210718Sedwin# # Toronto. 1474210718Sedwin# # Thunder Bay skipped DST in 1973. 1475210718Sedwin# # Many smaller locales did not observe peacetime DST until 1974; 1476210718Sedwin# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1477210718Sedwin# 1478210718Sedwin# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1479210718Sedwin# right corner of page 1, it says that Toronto will return to standard 1480210718Sedwin# time at 2 am Sunday morning (which agrees with the database), and that: 1481210718Sedwin# 1482210718Sedwin# The one-hour setback will go into effect throughout most of Ontario, 1483210718Sedwin# except in areas like Windsor which remains on standard time all year. 1484210718Sedwin# 1485210718Sedwin# Windsor is, of course, a lot larger than Nipigon. 1486210718Sedwin# 1487210718Sedwin# I only came across this incidentally. I don't know if Windsor began 1488210718Sedwin# observing DST when Detroit did, or in 1974, or on some other date. 1489210718Sedwin# 1490210718Sedwin# By the way, the article continues by noting that: 1491210718Sedwin# 1492210718Sedwin# Some cities in the United States have pushed the deadline back 1493210718Sedwin# three weeks and will change over from daylight saving in October. 1494210718Sedwin 1495210718Sedwin# From Arthur David Olson (2010-07-17): 1496210718Sedwin# 1497210718Sedwin# "Standard Time and Time Zones in Canada" appeared in 1498210718Sedwin# The Journal of The Royal Astronomical Society of Canada, 1499210718Sedwin# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1500210718Sedwin# was available at 1501210718Sedwin# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1502210718Sedwin# 1503210718Sedwin# It includes the text below (starting on page 57): 1504210718Sedwin# 1505210718Sedwin# A list of the places in Canada using daylight saving time would 1506210718Sedwin# require yearly revision. From information kindly furnished by 1507210718Sedwin# the provincial governments and by the postmasters in many cities 1508210718Sedwin# and towns, it is found that the following places used daylight sav- 1509210718Sedwin# ing in 1930. The information for the province of Quebec is definite, 1510210718Sedwin# for the other provinces only approximate: 1511210718Sedwin# 1512210718Sedwin# Province Daylight saving time used 1513210718Sedwin# Prince Edward Island Not used. 1514210718Sedwin# Nova Scotia In Halifax only. 1515210718Sedwin# New Brunswick In St. John only. 1516210718Sedwin# Quebec In the following places: 1517210718Sedwin# Montreal Lachine 1518210718Sedwin# Quebec Mont-Royal 1519273438Sdelphij# L��vis Iberville 1520273438Sdelphij# St. Lambert Cap de la Madel��ine 1521210718Sedwin# Verdun Loretteville 1522210718Sedwin# Westmount Richmond 1523273438Sdelphij# Outremont St. J��r��me 1524210718Sedwin# Longueuil Greenfield Park 1525210718Sedwin# Arvida Waterloo 1526210718Sedwin# Chambly-Canton Beaulieu 1527210718Sedwin# Melbourne La Tuque 1528273438Sdelphij# St. Th��ophile Buckingham 1529210718Sedwin# Ontario Used generally in the cities and towns along 1530210718Sedwin# the southerly part of the province. Not 1531273438Sdelphij# used in the northwesterly part. 1532210718Sedwin# Manitoba Not used. 1533210718Sedwin# Saskatchewan In Regina only. 1534210718Sedwin# Alberta Not used. 1535210718Sedwin# British Columbia Not used. 1536210718Sedwin# 1537210718Sedwin# With some exceptions, the use of daylight saving may be said to be limited 1538210718Sedwin# to those cities and towns lying between Quebec city and Windsor, Ont. 1539210718Sedwin 15402742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1541121098SwollmanRule Toronto 1919 only - Mar 30 23:30 1:00 D 1542121098SwollmanRule Toronto 1919 only - Oct 26 0:00 0 S 1543121098SwollmanRule Toronto 1920 only - May 2 2:00 1:00 D 1544121098SwollmanRule Toronto 1920 only - Sep 26 0:00 0 S 1545121098SwollmanRule Toronto 1921 only - May 15 2:00 1:00 D 1546121098SwollmanRule Toronto 1921 only - Sep 15 2:00 0 S 1547121098SwollmanRule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1548158421Swollman# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1549158421Swollman# was meant. 1550121098SwollmanRule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1551121098SwollmanRule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1552136638Swollman# The 1927-to-1939 rules can be expressed more simply as 1553136638Swollman# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1554136638Swollman# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1555136638Swollman# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1556136638Swollman# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1557136638Swollman# The rules below avoid use of Sun>=25 1558136638Swollman# (which pre-2004 versions of zic cannot handle). 1559136638SwollmanRule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1560136638SwollmanRule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1561136638SwollmanRule Toronto 1932 only - May 1 2:00 1:00 D 1562136638SwollmanRule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1563136638SwollmanRule Toronto 1933 only - Oct 1 2:00 0 S 1564136638SwollmanRule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1565121098SwollmanRule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1566121098SwollmanRule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1567121098SwollmanRule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1568121098SwollmanRule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1569121098SwollmanRule Toronto 1949 only - Nov lastSun 0:00 0 S 1570121098SwollmanRule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1571121098SwollmanRule Toronto 1950 only - Nov lastSun 2:00 0 S 1572121098SwollmanRule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1573158421Swollman# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1574163302Sru# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1575163302Sru# is wrong, and that he had confirmed it by checking the 1971-10-30 1576163302Sru# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1577121098SwollmanRule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1578121098Swollman 1579121098Swollman# From Paul Eggert (2003-07-27): 1580121098Swollman# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1581121098Swollman# Port Arthur, Ontario, the principle of the Bill has been in 1582121098Swollman# operation for the past three years, and in the City of Moose Jaw, 1583136638Swollman# Saskatchewan, for one year." 1584121098Swollman 1585136638Swollman# From David Bryan via Tory Tronrud, Director/Curator, 1586136638Swollman# Thunder Bay Museum (2003-11-12): 1587136638Swollman# There is some suggestion, however, that, by-law or not, daylight 1588136638Swollman# savings time was being practiced in Fort William and Port Arthur 1589136638Swollman# before 1909.... [I]n 1910, the line between the Eastern and Central 1590136638Swollman# Time Zones was permanently moved about two hundred miles west to 1591136638Swollman# include the Thunder Bay area.... When Canada adopted daylight 1592136638Swollman# savings time in 1916, Fort William and Port Arthur, having done so 1593136638Swollman# already, did not change their clocks.... During the Second World 1594136638Swollman# War,... [t]he cities agreed to implement DST during the summer 1595136638Swollman# months for the remainder of the war years. 1596136638Swollman 15972742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1598121098SwollmanZone America/Toronto -5:17:32 - LMT 1895 1599121098Swollman -5:00 Canada E%sT 1919 1600121098Swollman -5:00 Toronto E%sT 1942 Feb 9 2:00s 1601121098Swollman -5:00 Canada E%sT 1946 1602121098Swollman -5:00 Toronto E%sT 1974 1603121098Swollman -5:00 Canada E%sT 160417200SwollmanZone America/Thunder_Bay -5:57:00 - LMT 1895 1605136638Swollman -6:00 - CST 1910 1606136638Swollman -5:00 - EST 1942 160717200Swollman -5:00 Canada E%sT 1970 1608257682Sedwin -5:00 Toronto E%sT 1973 160917200Swollman -5:00 - EST 1974 161017200Swollman -5:00 Canada E%sT 161117200SwollmanZone America/Nipigon -5:53:04 - LMT 1895 1612121098Swollman -5:00 Canada E%sT 1940 Sep 29 1613121098Swollman -5:00 1:00 EDT 1942 Feb 9 2:00s 161417200Swollman -5:00 Canada E%sT 1615163302SruZone America/Rainy_River -6:18:16 - LMT 1895 1616121098Swollman -6:00 Canada C%sT 1940 Sep 29 1617121098Swollman -6:00 1:00 CDT 1942 Feb 9 2:00s 161817200Swollman -6:00 Canada C%sT 1619163302SruZone America/Atikokan -6:06:28 - LMT 1895 1620163302Sru -6:00 Canada C%sT 1940 Sep 29 1621163302Sru -6:00 1:00 CDT 1942 Feb 9 2:00s 1622163302Sru -6:00 Canada C%sT 1945 Sep 30 2:00 1623163302Sru -5:00 - EST 16242742Swollman 16258029Swollman 162617200Swollman# Manitoba 162719878Swollman 1628158421Swollman# From Rob Douglas (2006-04-06): 1629158421Swollman# the old Manitoba Time Act - as amended by Bill 2, assented to 1630158421Swollman# March 27, 1987 ... said ... 1631158421Swollman# "between two o'clock Central Standard Time in the morning of 1632158421Swollman# the first Sunday of April of each year and two o'clock Central 1633158421Swollman# Standard Time in the morning of the last Sunday of October next 1634158421Swollman# following, one hour in advance of Central Standard Time."... 1635273438Sdelphij# I believe that the English legislation [of the old time act] had 1636158421Swollman# been assented to (March 22, 1967).... 1637158421Swollman# Also, as far as I can tell, there was no order-in-council varying 1638158421Swollman# the time of Daylight Saving Time for 2005 and so the provisions of 1639158421Swollman# the 1987 version would apply - the changeover was at 2:00 Central 1640158421Swollman# Standard Time (i.e. not until 3:00 Central Daylight Time). 1641158421Swollman 1642158421Swollman# From Paul Eggert (2006-04-10): 1643158421Swollman# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1644158421Swollman# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1645158421Swollman# it was also 02:00s in 1966. 1646158421Swollman 16472742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16482742SwollmanRule Winn 1916 only - Apr 23 0:00 1:00 D 16492742SwollmanRule Winn 1916 only - Sep 17 0:00 0 S 16502742SwollmanRule Winn 1918 only - Apr 14 2:00 1:00 D 1651233447SedwinRule Winn 1918 only - Oct 27 2:00 0 S 16522742SwollmanRule Winn 1937 only - May 16 2:00 1:00 D 165314343SwollmanRule Winn 1937 only - Sep 26 2:00 0 S 1654121098SwollmanRule Winn 1942 only - Feb 9 2:00 1:00 W # War 1655121098SwollmanRule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 16562742SwollmanRule Winn 1945 only - Sep lastSun 2:00 0 S 16572742SwollmanRule Winn 1946 only - May 12 2:00 1:00 D 16582742SwollmanRule Winn 1946 only - Oct 13 2:00 0 S 16592742SwollmanRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 166014343SwollmanRule Winn 1947 1949 - Sep lastSun 2:00 0 S 166114343SwollmanRule Winn 1950 only - May 1 2:00 1:00 D 166214343SwollmanRule Winn 1950 only - Sep 30 2:00 0 S 166314343SwollmanRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 166414343SwollmanRule Winn 1951 1958 - Sep lastSun 2:00 0 S 16652742SwollmanRule Winn 1959 only - Oct lastSun 2:00 0 S 16662742SwollmanRule Winn 1960 only - Sep lastSun 2:00 0 S 16672742SwollmanRule Winn 1963 only - Apr lastSun 2:00 1:00 D 166814343SwollmanRule Winn 1963 only - Sep 22 2:00 0 S 1669158421SwollmanRule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1670158421SwollmanRule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1671158421SwollmanRule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 16722742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16732742SwollmanZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1674158421Swollman -6:00 Winn C%sT 2006 1675158421Swollman -6:00 Canada C%sT 16762742Swollman 16778029Swollman 167817200Swollman# Saskatchewan 167917200Swollman 1680121098Swollman# From Mark Brader (2003-07-26): 1681121098Swollman# The first actual adoption of DST in Canada was at the municipal 1682121098Swollman# level. As the [Toronto] Star put it (1912-06-07), "While people 1683121098Swollman# elsewhere have long been talking of legislation to save daylight, 1684121098Swollman# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1685121098Swollman# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1686121098Swollman# presumably late evening, as below), and would run until "the end of 1687121098Swollman# the summer". The discrepancy between municipal time and railroad 1688121098Swollman# time was noted. 1689121098Swollman 1690121098Swollman# From Paul Eggert (2003-07-27): 1691121098Swollman# Willett (1914-03) notes that DST "has been in operation ... in the 1692121098Swollman# City of Moose Jaw, Saskatchewan, for one year." 1693121098Swollman 1694158421Swollman# From Paul Eggert (2006-03-22): 1695158421Swollman# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 169617200Swollman# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 169717200Swollman# Other western towns (e.g. Lloydminster) are like Edmonton. 169867578Swollman# Matthews and Vincent (1998) write that Denare Beach and Creighton 169967578Swollman# are like Winnipeg, in violation of Saskatchewan law. 170017200Swollman 1701149514Swollman# From W. Jones (1992-11-06): 170217200Swollman# The. . .below is based on information I got from our law library, the 170317200Swollman# provincial archives, and the provincial Community Services department. 170417200Swollman# A precise history would require digging through newspaper archives, and 170517200Swollman# since you didn't say what you wanted, I didn't bother. 170617200Swollman# 170717200Swollman# Saskatchewan is split by a time zone meridian (105W) and over the years 170817200Swollman# the boundary became pretty ragged as communities near it reevaluated 170917200Swollman# their affiliations in one direction or the other. In 1965 a provincial 171017200Swollman# referendum favoured legislating common time practices. 171117200Swollman# 171217200Swollman# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 171317200Swollman# Saskatchewan 1978) was proclaimed, and established that the eastern 171417200Swollman# part of Saskatchewan would use CST year round, that districts in 171517200Swollman# northwest Saskatchewan would by default follow CST but could opt to 171617200Swollman# follow Mountain Time rules (thus 1 hour difference in the winter and 171717200Swollman# zero in the summer), and that districts in southwest Saskatchewan would 171817200Swollman# by default follow MT but could opt to follow CST. 171917200Swollman# 172017200Swollman# It took a few years for the dust to settle (I know one story of a town 172117200Swollman# on one time zone having its school in another, such that a mom had to 172217200Swollman# serve her family lunch in two shifts), but presently it seems that only 172317200Swollman# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 172417200Swollman# rules any more; all other districts appear to have used CST year round 172517200Swollman# since sometime in the 1960s. 172617200Swollman 1727163302Sru# From Chris Walton (2006-06-26): 1728163302Sru# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1729163302Sru# long and rather painful to read. 1730163302Sru# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1731163302Sru 17322742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17332742SwollmanRule Regina 1918 only - Apr 14 2:00 1:00 D 1734233447SedwinRule Regina 1918 only - Oct 27 2:00 0 S 17352742SwollmanRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 17362742SwollmanRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 17372742SwollmanRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 17382742SwollmanRule Regina 1937 only - Oct Sun>=8 0:00 0 S 17392742SwollmanRule Regina 1938 only - Oct Sun>=1 0:00 0 S 17402742SwollmanRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1741121098SwollmanRule Regina 1942 only - Feb 9 2:00 1:00 W # War 1742121098SwollmanRule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 17432742SwollmanRule Regina 1945 only - Sep lastSun 2:00 0 S 174417200SwollmanRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 174517200SwollmanRule Regina 1946 only - Oct Sun>=8 2:00 0 S 1746121098SwollmanRule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1747121098SwollmanRule Regina 1947 1957 - Sep lastSun 2:00 0 S 1748121098SwollmanRule Regina 1959 only - Apr lastSun 2:00 1:00 D 174917200SwollmanRule Regina 1959 only - Oct lastSun 2:00 0 S 175017200Swollman# 175117200SwollmanRule Swift 1957 only - Apr lastSun 2:00 1:00 D 175217200SwollmanRule Swift 1957 only - Oct lastSun 2:00 0 S 175317200SwollmanRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 175417200SwollmanRule Swift 1959 only - Oct lastSun 2:00 0 S 175517200SwollmanRule Swift 1960 1961 - Sep lastSun 2:00 0 S 17562742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 175717200SwollmanZone America/Regina -6:58:36 - LMT 1905 Sep 175817200Swollman -7:00 Regina M%sT 1960 Apr lastSun 2:00 17592742Swollman -6:00 - CST 176017200SwollmanZone America/Swift_Current -7:11:20 - LMT 1905 Sep 176117200Swollman -7:00 Canada M%sT 1946 Apr lastSun 2:00 176217200Swollman -7:00 Regina M%sT 1950 176317200Swollman -7:00 Swift M%sT 1972 Apr lastSun 2:00 176417200Swollman -6:00 - CST 17652742Swollman 17668029Swollman 176717200Swollman# Alberta 176817200Swollman 17692742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17702742SwollmanRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1771233447SedwinRule Edm 1918 only - Oct 27 2:00 0 S 17722742SwollmanRule Edm 1919 only - May 27 2:00 0 S 17732742SwollmanRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 17742742SwollmanRule Edm 1920 only - Oct lastSun 2:00 0 S 17752742SwollmanRule Edm 1921 1923 - Sep lastSun 2:00 0 S 1776121098SwollmanRule Edm 1942 only - Feb 9 2:00 1:00 W # War 1777121098SwollmanRule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 17782742SwollmanRule Edm 1945 only - Sep lastSun 2:00 0 S 17792742SwollmanRule Edm 1947 only - Apr lastSun 2:00 1:00 D 17802742SwollmanRule Edm 1947 only - Sep lastSun 2:00 0 S 17812742SwollmanRule Edm 1967 only - Apr lastSun 2:00 1:00 D 17822742SwollmanRule Edm 1967 only - Oct lastSun 2:00 0 S 17832742SwollmanRule Edm 1969 only - Apr lastSun 2:00 1:00 D 17842742SwollmanRule Edm 1969 only - Oct lastSun 2:00 0 S 17852742SwollmanRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1786158421SwollmanRule Edm 1972 2006 - Oct lastSun 2:00 0 S 17872742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17882742SwollmanZone America/Edmonton -7:33:52 - LMT 1906 Sep 1789158421Swollman -7:00 Edm M%sT 1987 1790158421Swollman -7:00 Canada M%sT 17912742Swollman 17928029Swollman 179317200Swollman# British Columbia 179417200Swollman 1795158421Swollman# From Paul Eggert (2006-03-22): 1796158421Swollman# Shanks & Pottenger write that since 1970 most of this region has 1797158421Swollman# been like Vancouver. 179858787Sru# Dawson Creek uses MST. Much of east BC is like Edmonton. 179967578Swollman# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 180017200Swollman 1801233447Sedwin# It seems though that (re: Creston) is not entirely correct: 1802233447Sedwin 1803233447Sedwin# From Chris Walton (2011-12-01): 1804233447Sedwin# There are two areas within the Canadian province of British Columbia 1805233447Sedwin# that do not currently observe daylight saving: 1806233447Sedwin# a) The Creston Valley (includes the town of Creston and surrounding area) 1807233447Sedwin# b) The eastern half of the Peace River Regional District 1808233447Sedwin# (includes the cities of Dawson Creek and Fort St. John) 1809233447Sedwin 1810233447Sedwin# Earlier this year I stumbled across a detailed article about the time 1811233447Sedwin# keeping history of Creston; it was written by Tammy Hardwick who is the 1812233447Sedwin# manager of the Creston & District Museum. The article was written in May 2009. 1813233447Sedwin# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1814233447Sedwin# According to the article, Creston has not changed its clocks since June 1918. 1815233447Sedwin# i.e. Creston has been stuck on UTC-7 for 93 years. 1816233447Sedwin# Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1817233447Sedwin 1818233447Sedwin# Unfortunately the exact date for the time change in June 1918 remains 1819233447Sedwin# unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1820233447Sedwin# ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1821233447Sedwin# as plausible as any other date (in June). She also said that after writing the 1822233447Sedwin# article she had discovered another time change in 1916; this is the subject 1823233447Sedwin# of another article which she wrote in October 2010. 1824233447Sedwin# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1825233447Sedwin 1826233447Sedwin# Here is a summary of the three clock change events in Creston's history: 1827233447Sedwin# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1828233447Sedwin# Exact date unknown 1829240461Sedwin# 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1830233447Sedwin# Exact date in October unknown; Sunday October 1 is a reasonable guess. 1831233447Sedwin# 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1832233447Sedwin# Exact date in June unknown; Sunday June 2 is a reasonable guess. 1833233447Sedwin# note#1: 1834233447Sedwin# On Oct 27/1918 when daylight saving ended in the rest of Canada, 1835233447Sedwin# Creston did not change its clocks. 1836233447Sedwin# note#2: 1837233447Sedwin# During WWII when the Federal Government legislated a mandatory clock change, 1838233447Sedwin# Creston did not oblige. 1839233447Sedwin# note#3: 1840233447Sedwin# There is no guarantee that Creston will remain on Mountain Standard Time 1841233447Sedwin# (UTC-7) forever. 1842233447Sedwin# The subject was debated at least once this year by the town Council. 1843233447Sedwin# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1844233447Sedwin 1845233447Sedwin# During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1846233447Sedwin# In Creston, that was handled by shifting the area to PST (-8:00) then applying 1847233447Sedwin# summer time to cause the offset to be -7:00, the same as it had been before 1848233447Sedwin# the change. It can be argued that the timezone abbreviation during this 1849233447Sedwin# period should be PDT rather than MST, but that doesn't seem important enough 1850233447Sedwin# (to anyone) to further complicate the rules. 1851233447Sedwin 1852233447Sedwin# The transition dates (and times) are guesses. 1853233447Sedwin 18542742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 18552742SwollmanRule Vanc 1918 only - Apr 14 2:00 1:00 D 1856233447SedwinRule Vanc 1918 only - Oct 27 2:00 0 S 1857121098SwollmanRule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1858121098SwollmanRule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 18592742SwollmanRule Vanc 1945 only - Sep 30 2:00 0 S 18602742SwollmanRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 18612742SwollmanRule Vanc 1946 only - Oct 13 2:00 0 S 18622742SwollmanRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1863158421SwollmanRule Vanc 1962 2006 - Oct lastSun 2:00 0 S 18642742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18652742SwollmanZone America/Vancouver -8:12:28 - LMT 1884 1866158421Swollman -8:00 Vanc P%sT 1987 1867158421Swollman -8:00 Canada P%sT 186817200SwollmanZone America/Dawson_Creek -8:00:56 - LMT 1884 186917200Swollman -8:00 Canada P%sT 1947 187017200Swollman -8:00 Vanc P%sT 1972 Aug 30 2:00 187117200Swollman -7:00 - MST 1872233447SedwinZone America/Creston -7:46:04 - LMT 1884 1873233447Sedwin -7:00 - MST 1916 Oct 1 1874233447Sedwin -8:00 - PST 1918 Jun 2 1875233447Sedwin -7:00 - MST 18762742Swollman 187758787Sru# Northwest Territories, Nunavut, Yukon 187817200Swollman 1879158421Swollman# From Paul Eggert (2006-03-22): 188017200Swollman# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1881149514Swollman# Mathew Englander (1996-10-07) gives the following refs: 188220094Swollman# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 188320094Swollman# c. 7 defines Yukon standard time as UTC-9. This is still valid; 188420094Swollman# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 188520094Swollman# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 188620094Swollman# * O.I.C. 1980/02 established DST. 188720094Swollman# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1888158421Swollman# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1889158421Swollman# with Englander. 1890163302Sru# From Chris Walton (2006-06-26): 1891163302Sru# Here is a link to the old daylight saving portion of the interpretation 1892163302Sru# act which was last updated in 1987: 1893163302Sru# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf 189417200Swollman 189558787Sru# From Rives McDow (1999-09-04): 189658787Sru# Nunavut ... moved ... to incorporate the whole territory into one time zone. 189758787Sru# Nunavut moves to single time zone Oct. 31 1898273438Sdelphij# <http://www.nunatsiaq.com/nunavut/nvt90903_13.html> 189958787Sru# 190058787Sru# From Antoine Leca (1999-09-06): 190158787Sru# We then need to create a new timezone for the Kitikmeot region of Nunavut 190258787Sru# to differentiate it from the Yellowknife region. 190358787Sru 190458787Sru# From Paul Eggert (1999-09-20): 190558787Sru# Basic Facts: The New Territory 1906273438Sdelphij# <http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html> 1907273438Sdelphij# (1999) reports that Pangnirtung operates on eastern time, 190858787Sru# and that Coral Harbour does not observe DST. We don't know when 190986222Swollman# Pangnirtung switched to eastern time; we'll guess 1995. 191058787Sru 191158787Sru# From Rives McDow (1999-11-08): 191258787Sru# On October 31, when the rest of Nunavut went to Central time, 191358787Sru# Pangnirtung wobbled. Here is the result of their wobble: 191458787Sru# 191558787Sru# The following businesses and organizations in Pangnirtung use Central Time: 191658787Sru# 191758787Sru# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 191858787Sru# Eastern Arctic National Parks, A & D Specialist 191958787Sru# 192058787Sru# The following businesses and organizations in Pangnirtung use Eastern Time: 192158787Sru# 192258787Sru# Hamlet office, All other businesses, Both schools, Airport operator 192358787Sru# 192458787Sru# This has made for an interesting situation there, which warranted the news. 192558787Sru# No one there that I spoke with seems concerned, or has plans to 192658787Sru# change the local methods of keeping time, as it evidently does not 192758787Sru# really interfere with any activities or make things difficult locally. 192858787Sru# They plan to celebrate New Year's turn-over twice, one hour apart, 192958787Sru# so it appears that the situation will last at least that long. 193058787Sru# The Nunavut Intergovernmental Affairs hopes that they will "come to 193158787Sru# their senses", but the locals evidently don't see any problem with 193258787Sru# the current state of affairs. 193358787Sru 193458787Sru# From Michaela Rodrigue, writing in the 1935273438Sdelphij# Nunatsiaq News (1999-11-19) 1936273438Sdelphij# <http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html>: 193758787Sru# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 193858787Sru# central - or Nunavut time - for government offices, and eastern time 193958787Sru# for municipal offices and schools.... Igloolik [was similar but then] 194058787Sru# made the switch to central time on Saturday, Nov. 6. 194158787Sru 194267578Swollman# From Paul Eggert (2000-10-02): 194367578Swollman# Matthews and Vincent (1998) say the following, but we lack histories 194467578Swollman# for these potential new Zones. 194575267Swollman# 194667578Swollman# The Canadian Forces station at Alert uses Eastern Time while the 194767578Swollman# handful of residents at the Eureka weather station [in the Central 194867578Swollman# zone] skip daylight savings. Baffin Island, which is crossed by the 194967578Swollman# Central, Eastern and Atlantic Time zones only uses Eastern Time. 195067578Swollman# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 195167578Swollman# Central Time and Southampton Island [in the Central zone] is not 195267578Swollman# required to use daylight savings. 195367578Swollman 1954273438Sdelphij# From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html> 1955273438Sdelphij# Nunavut now has two time zones (2000-11-10): 195675267Swollman# The Nunavut government would allow its employees in Kugluktuk and 195775267Swollman# Cambridge Bay to operate on central time year-round, putting them 195875267Swollman# one hour behind the rest of Nunavut for six months during the winter. 195975267Swollman# At the end of October the two communities had rebelled against 196075267Swollman# Nunavut's unified time zone, refusing to shift to eastern time with 196175267Swollman# the rest of the territory for the winter. Cambridge Bay remained on 196275267Swollman# central time, while Kugluktuk, even farther west, reverted to 196375267Swollman# mountain time, which they had used before the advent of Nunavut's 196475267Swollman# unified time zone in 1999. 196575267Swollman# 196675267Swollman# From Rives McDow (2001-01-20), quoting the Nunavut government: 196775267Swollman# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 196875267Swollman 196975267Swollman# From Paul Eggert (2000-12-04): 197075267Swollman# Let's just keep track of the official times for now. 197175267Swollman 197275267Swollman# From Rives McDow (2001-03-07): 197375267Swollman# The premier of Nunavut has issued a ministerial statement advising 197475267Swollman# that effective 2001-04-01, the territory of Nunavut will revert 197575267Swollman# back to three time zones (mountain, central, and eastern). Of the 197675267Swollman# cities in Nunavut, Coral Harbor is the only one that I know of that 197775267Swollman# has said it will not observe dst, staying on EST year round. I'm 197875267Swollman# checking for more info, and will get back to you if I come up with 197975267Swollman# more. 198075267Swollman# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 198175267Swollman 1982149514Swollman# From Gwillim Law (2005-05-21): 1983149514Swollman# According to maps at 1984149514Swollman# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg 1985149514Swollman# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg 1986149514Swollman# (both dated 2003), and 1987149514Swollman# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 1988149514Swollman# (from a 1998 Canadian Geographic article), the de facto and de jure time 1989149514Swollman# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 1990149514Swollman# round. Using Google, it's easy to find other websites that confirm this. 1991149514Swollman# I wasn't able to find how far back this time regimen goes, but since it 1992149514Swollman# predates the creation of Nunavut, it probably goes back many years.... 1993149514Swollman# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 1994149514Swollman# 1995149514Swollman# From Paul Eggert (2005-07-26): 1996149514Swollman# For lack of better information, assume that Southampton Island observed 1997149514Swollman# daylight saving only during wartime. 1998149514Swollman 1999169811Swollman# From Chris Walton (2007-03-01): 2000169811Swollman# ... the community of Resolute (located on Cornwallis Island in 2001169811Swollman# Nunavut) moved from Central Time to Eastern Time last November. 2002169811Swollman# Basically the community did not change its clocks at the end of 2003169811Swollman# daylight saving.... 2004169811Swollman# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2005163302Sru 2006226298Sedwin# From Chris Walton (2011-03-21): 2007226298Sedwin# Back in 2007 I initiated the creation of a new "zone file" for Resolute 2008226298Sedwin# Bay. Resolute Bay is a small community located about 900km north of 2009226298Sedwin# the Arctic Circle. The zone file was required because Resolute Bay had 2010226298Sedwin# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2011169811Swollman# 2012226298Sedwin# According to new information which I received last week, Resolute Bay 2013226298Sedwin# went back to using UTC-6 in the winter of 2007-2008... 2014226298Sedwin# 2015226298Sedwin# On March 11/2007 most of Canada went onto daylight saving. On March 2016226298Sedwin# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2017226298Sedwin# talked to somebody that was both knowledgeable and helpful. I was able 2018226298Sedwin# to confirm that Resolute Bay was still operating on UTC-5. It was 2019226298Sedwin# explained to me that Resolute Bay had been on the Eastern Time zone 2020226298Sedwin# (EST) in the winter, and was now back on the Central Time zone (CDT). 2021226298Sedwin# i.e. the time zone had changed twice in the last year but the clocks 2022226298Sedwin# had not moved. The residents had to know which time zone they were in 2023226298Sedwin# so they could follow the correct TV schedule... 2024226298Sedwin# 2025226298Sedwin# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2026226298Sedwin# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2027226298Sedwin# of the phone call, I decided to seek out an alternate source of 2028226298Sedwin# information. I found an e-mail address for somebody by the name of 2029226298Sedwin# Stephanie Adams whose job was listed as "Inns North Support Officer for 2030226298Sedwin# Arctic Co-operatives." I was under the impression that Stephanie lived 2031226298Sedwin# and worked in Resolute Bay... 2032226298Sedwin# 2033226298Sedwin# On March 14/2011 I phoned the hamlet office again. I was told that 2034226298Sedwin# Resolute Bay had been using Central Standard Time over the winter of 2035226298Sedwin# 2010-2011 and that the clocks had therefore been moved one hour ahead 2036226298Sedwin# on March 13/2011. The person I talked to was aware that Resolute Bay 2037226298Sedwin# had previously experimented with Eastern Standard Time but he could not 2038226298Sedwin# tell me when the practice had stopped. 2039226298Sedwin# 2040226298Sedwin# On March 17/2011 I searched the Web to find an e-mail address of 2041226298Sedwin# somebody that might be able to tell me exactly when Resolute Bay went 2042226298Sedwin# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2043226298Sedwin# used to be the mayor of Resolute Bay and he apparently owns half the 2044226298Sedwin# businesses including "South Camp Inn." This website has some info on 2045226298Sedwin# Aziz: 2046226298Sedwin# http://www.uphere.ca/node/493 2047226298Sedwin# 2048226298Sedwin# I sent Aziz an e-mail asking when Resolute Bay had stopped using 2049226298Sedwin# Eastern Standard Time. 2050226298Sedwin# 2051226298Sedwin# Aziz responded quickly with this: "hi, The time was not changed for the 2052226298Sedwin# 1 year only, the following year, the community went back to the old way 2053226298Sedwin# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2054226298Sedwin# the winter Zulu plus 6 hrs" 2055226298Sedwin# 2056226298Sedwin# This of course conflicted with everything I had ascertained in November 2008. 2057226298Sedwin# 2058226298Sedwin# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2059226298Sedwin# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2060226298Sedwin# may want to check with the weather office in Resolute Bay or do a 2061226298Sedwin# search on the weather through Env. Canada. web site" 2062226298Sedwin# 2063226298Sedwin# If I had realized the Stephanie did not live in Resolute Bay I would 2064226298Sedwin# never have contacted her. I now believe that all the information I 2065226298Sedwin# obtained in November 2008 should be ignored... 2066226298Sedwin# I apologize for reporting incorrect information in 2008. 2067169811Swollman 20682742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 206917200SwollmanRule NT_YK 1918 only - Apr 14 2:00 1:00 D 207017200SwollmanRule NT_YK 1918 only - Oct 27 2:00 0 S 207117200SwollmanRule NT_YK 1919 only - May 25 2:00 1:00 D 207217200SwollmanRule NT_YK 1919 only - Nov 1 0:00 0 S 2073121098SwollmanRule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2074121098SwollmanRule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 207517200SwollmanRule NT_YK 1945 only - Sep 30 2:00 0 S 207617200SwollmanRule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 207717200SwollmanRule NT_YK 1965 only - Oct lastSun 2:00 0 S 207817200SwollmanRule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2079158421SwollmanRule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2080158421SwollmanRule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 20812742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2082169811Swollman# aka Panniqtuuq 2083169811SwollmanZone America/Pangnirtung 0 - zzz 1921 # trading post est. 208458787Sru -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 208558787Sru -5:00 Canada E%sT 1999 Oct 31 2:00 208675267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 208775267Swollman -5:00 Canada E%sT 2088169811Swollman# formerly Frobisher Bay 2089169811SwollmanZone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 209058787Sru -5:00 NT_YK E%sT 1999 Oct 31 2:00 209175267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 209275267Swollman -5:00 Canada E%sT 2093169811Swollman# aka Qausuittuq 2094169811SwollmanZone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 209575267Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 209675267Swollman -5:00 - EST 2001 Apr 1 3:00 2097169811Swollman -6:00 Canada C%sT 2006 Oct 29 2:00 2098226298Sedwin -5:00 - EST 2007 Mar 11 3:00 2099226298Sedwin -6:00 Canada C%sT 2100169811Swollman# aka Kangiqiniq 2101169811SwollmanZone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 2102169811Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 2103169811Swollman -5:00 - EST 2001 Apr 1 3:00 210458787Sru -6:00 Canada C%sT 2105169811Swollman# aka Iqaluktuuttiaq 2106169811SwollmanZone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 210758787Sru -7:00 NT_YK M%sT 1999 Oct 31 2:00 210875267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 210975267Swollman -5:00 - EST 2000 Nov 5 0:00 211075267Swollman -6:00 - CST 2001 Apr 1 3:00 211175267Swollman -7:00 Canada M%sT 2112169811SwollmanZone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 2113158421Swollman -7:00 NT_YK M%sT 1980 2114158421Swollman -7:00 Canada M%sT 2115169811SwollmanZone America/Inuvik 0 - zzz 1953 # Inuvik founded 211617200Swollman -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2117158421Swollman -7:00 NT_YK M%sT 1980 2118158421Swollman -7:00 Canada M%sT 21192742SwollmanZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 212017200Swollman -9:00 NT_YK Y%sT 1966 Jul 1 2:00 2121158421Swollman -8:00 NT_YK P%sT 1980 2122158421Swollman -8:00 Canada P%sT 212317200SwollmanZone America/Dawson -9:17:40 - LMT 1900 Aug 20 212420094Swollman -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2125158421Swollman -8:00 NT_YK P%sT 1980 2126158421Swollman -8:00 Canada P%sT 21272742Swollman 21288029Swollman 21292742Swollman############################################################################### 21302742Swollman 21312742Swollman# Mexico 21322742Swollman 213375267Swollman# From Paul Eggert (2001-03-05): 213475267Swollman# The Investigation and Analysis Service of the 213575267Swollman# Mexican Library of Congress (MLoC) has published a 213675267Swollman# history of Mexican local time (in Spanish) 2137273438Sdelphij# <http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/>. 21382742Swollman# 2139158421Swollman# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 214075267Swollman# (In all cases we go with the MLoC.) 2141158421Swollman# S&P report that Baja was at -8:00 in 1922/1923. 2142158421Swollman# S&P say the 1930 transition in Baja was 1930-11-16. 2143158421Swollman# S&P report no DST during summer 1931. 2144158421Swollman# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 21452742Swollman 214675267Swollman# From Gwillim Law (2001-02-20): 214775267Swollman# There are some other discrepancies between the Decrees page and the 214875267Swollman# tz database. I think they can best be explained by supposing that 214975267Swollman# the researchers who prepared the Decrees page failed to find some of 215075267Swollman# the relevant documents. 215175267Swollman 2152149514Swollman# From Alan Perry (1996-02-15): 215317200Swollman# A guy from our Mexico subsidiary finally found the Presidential Decree 215417200Swollman# outlining the timezone changes in Mexico. 215558787Sru# 215617200Swollman# ------------- Begin Forwarded Message ------------- 215758787Sru# 215817200Swollman# I finally got my hands on the Official Presidential Decree that sets up the 215917200Swollman# rules for the DST changes. The rules are: 216058787Sru# 216117200Swollman# 1. The country is divided in 3 timezones: 216217200Swollman# - Baja California Norte (the Mexico/BajaNorte TZ) 216317200Swollman# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 216417200Swollman# - The rest of the country (the Mexico/General TZ) 216558787Sru# 216617200Swollman# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 216717200Swollman# at 2:00 AM, the times in each zone are as follows: 216817200Swollman# BajaNorte: GMT+7 216917200Swollman# BajaSur: GMT+6 217017200Swollman# General: GMT+5 217158787Sru# 217217200Swollman# 3. The rest of the year, the times are as follows: 217317200Swollman# BajaNorte: GMT+8 217417200Swollman# BajaSur: GMT+7 217517200Swollman# General: GMT+6 217658787Sru# 217717200Swollman# The Decree was published in Mexico's Official Newspaper on January 4th. 217858787Sru# 217917200Swollman# -------------- End Forwarded Message -------------- 218017200Swollman# From Paul Eggert (1996-06-12): 218143014Swollman# For an English translation of the decree, see 2182273438Sdelphij# "Diario Oficial: Time Zone Changeover" (1996-01-04) 2183273438Sdelphij# <http://mexico-travel.com/extra/timezone_eng.html>. 218414343Swollman 218543543Swollman# From Rives McDow (1998-10-08): 218643543Swollman# The State of Quintana Roo has reverted back to central STD and DST times 218743543Swollman# (i.e. UTC -0600 and -0500 as of 1998-08-02). 218843543Swollman 218958787Sru# From Rives McDow (2000-01-10): 219058787Sru# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 219158787Sru# zone 5 hours from the International Date Line, and will not observe daylight 219258787Sru# savings time so as to stay on the same time zone as the southern part of 219358787Sru# Arizona year round. 219458787Sru 2195273438Sdelphij# From Jesper N��rgaard, translating 219675267Swollman# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 219775267Swollman# In Oaxaca, the 55.000 teachers from the Section 22 of the National 219875267Swollman# Syndicate of Education Workers, refuse to apply daylight saving each 219975267Swollman# year, so that the more than 10,000 schools work at normal hour the 220075267Swollman# whole year. 220175267Swollman 220275267Swollman# From Gwillim Law (2001-01-19): 220375267Swollman# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 220475267Swollman# (translated):... 220575267Swollman# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 220675267Swollman# that Summer Time will be reduced from seven to five months, starting 220775267Swollman# this year.... 220875267Swollman# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 220975267Swollman# [translated], says "summer time will ... take effect on the first Sunday 221075267Swollman# in May, and end on the last Sunday of September. 221175267Swollman 221275267Swollman# From Arthur David Olson (2001-01-25): 221375267Swollman# The 2001-01-24 traditional Washington Post contained the page one 221475267Swollman# story "Timely Issue Divides Mexicans."... 221575267Swollman# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2216273438Sdelphij# ... Mexico City Mayor L��pez Obrador "...is threatening to keep 221775267Swollman# Mexico City and its 20 million residents on a different time than 2218273438Sdelphij# the rest of the country..." In particular, L��pez Obrador would abolish 221975267Swollman# observation of Daylight Saving Time. 222075267Swollman 222175267Swollman# Official statute published by the Energy Department 2222273438Sdelphij# <http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre> 2223273438Sdelphij# (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2224273438Sdelphij# and Sonora with no DST. This was reported by Jesper N��rgaard (2001-02-03). 222575267Swollman 222675267Swollman# From Paul Eggert (2001-03-03): 222775267Swollman# 2228273438Sdelphij# <http://www.latimes.com/news/nation/20010303/t000018766.html> 222975267Swollman# James F. Smith writes in today's LA Times 223075267Swollman# * Sonora will continue to observe standard time. 2231273438Sdelphij# * Last week Mexico City's mayor Andr��s Manuel L��pez Obrador decreed that 223275267Swollman# the Federal District will not adopt DST. 223375267Swollman# * 4 of 16 district leaders announced they'll ignore the decree. 223475267Swollman# * The decree does not affect federal-controlled facilities including 223575267Swollman# the airport, banks, hospitals, and schools. 223675267Swollman# 223775267Swollman# For now we'll assume that the Federal District will bow to federal rules. 223875267Swollman 2239273438Sdelphij# From Jesper N��rgaard (2001-04-01): 224075267Swollman# I found some references to the Mexican application of daylight 224175267Swollman# saving, which modifies what I had already sent you, stating earlier 224275267Swollman# that a number of northern Mexican states would go on daylight 224375267Swollman# saving. The modification reverts this to only cover Baja California 224475267Swollman# (Norte), while all other states (except Sonora, who has no daylight 224575267Swollman# saving all year) will follow the original decree of president 224675267Swollman# Vicente Fox, starting daylight saving May 6, 2001 and ending 224775267Swollman# September 30, 2001. 2248273438Sdelphij# References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp> 224975267Swollman# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 225075267Swollman 225186222Swollman# From Reuters (2001-09-04): 225286222Swollman# Mexico's Supreme Court on Tuesday declared that daylight savings was 225386222Swollman# unconstitutional in Mexico City, creating the possibility the 225486222Swollman# capital will be in a different time zone from the rest of the nation 225586222Swollman# next year.... The Supreme Court's ruling takes effect at 2:00 225686222Swollman# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 225786222Swollman# standard time. "This is so residents of the Federal District are not 225886222Swollman# subject to unexpected time changes," a statement from the court said. 225986222Swollman 2260273438Sdelphij# From Jesper N��rgaard Welen (2002-03-12): 226193799Swollman# ... consulting my local grocery store(!) and my coworkers, they all insisted 226293799Swollman# that a new decision had been made to reinstate US style DST in Mexico.... 226393799Swollman# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 226493799Swollman# confirms this. Sonora as usual is the only state where DST is not applied. 226593799Swollman 2266203019Sedwin# From Steffen Thorsen (2009-12-28): 2267203019Sedwin# 2268203019Sedwin# Steffen Thorsen wrote: 2269203019Sedwin# > Mexico's House of Representatives has approved a proposal for northern 2270203019Sedwin# > Mexico's border cities to share the same daylight saving schedule as 2271203019Sedwin# > the United States. 2272203019Sedwin# Now this has passed both the Congress and the Senate, so starting from 2273203019Sedwin# 2010, some border regions will be the same: 2274203019Sedwin# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2275203019Sedwin# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2276203019Sedwin# (Spanish) 2277203019Sedwin# 2278203019Sedwin# Could not find the new law text, but the proposed law text changes are here: 2279203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2280203019Sedwin# (Gaceta Parlamentaria) 2281203019Sedwin# 2282203019Sedwin# There is also a list of the votes here: 2283203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2284203019Sedwin# 2285203019Sedwin# Our page: 2286203019Sedwin# http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2287203019Sedwin 2288203019Sedwin# From Arthur David Olson (2010-01-20): 2289203019Sedwin# The page 2290203019Sedwin# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2291203019Sedwin# includes this text: 2292203019Sedwin# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2293273438Sdelphij# Ju��rez y Ojinaga en Chihuahua; Acu��a y Piedras Negras en Coahuila; 2294273438Sdelphij# An��huac en Nuevo Le��n; y Nuevo Laredo, Reynosa y Matamoros en 2295273438Sdelphij# Tamaulipas, la aplicaci��n de este horario estacional surtir�� efecto 2296273438Sdelphij# desde las dos horas del segundo domingo de marzo y concluir�� a las dos 2297203019Sedwin# horas del primer domingo de noviembre. 2298203019Sedwin# En los municipios fronterizos que se encuentren ubicados en la franja 2299273438Sdelphij# fronteriza norte en el territorio comprendido entre la l��nea 2300273438Sdelphij# internacional y la l��nea paralela ubicada a una distancia de veinte 2301273438Sdelphij# kil��metros, as�� como la Ciudad de Ensenada, Baja California, hacia el 2302273438Sdelphij# interior del pa��s, la aplicaci��n de este horario estacional surtir�� 2303273438Sdelphij# efecto desde las dos horas del segundo domingo de marzo y concluir�� a 2304203019Sedwin# las dos horas del primer domingo de noviembre. 2305203019Sedwin 23062742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 23072742SwollmanRule Mexico 1939 only - Feb 5 0:00 1:00 D 23082742SwollmanRule Mexico 1939 only - Jun 25 0:00 0 S 23092742SwollmanRule Mexico 1940 only - Dec 9 0:00 1:00 D 23102742SwollmanRule Mexico 1941 only - Apr 1 0:00 0 S 2311121098SwollmanRule Mexico 1943 only - Dec 16 0:00 1:00 W # War 23122742SwollmanRule Mexico 1944 only - May 1 0:00 0 S 23132742SwollmanRule Mexico 1950 only - Feb 12 0:00 1:00 D 23142742SwollmanRule Mexico 1950 only - Jul 30 0:00 0 S 231575267SwollmanRule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 231675267SwollmanRule Mexico 1996 2000 - Oct lastSun 2:00 0 S 231793799SwollmanRule Mexico 2001 only - May Sun>=1 2:00 1:00 D 231893799SwollmanRule Mexico 2001 only - Sep lastSun 2:00 0 S 231993799SwollmanRule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 232093799SwollmanRule Mexico 2002 max - Oct lastSun 2:00 0 S 23212742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2322273438Sdelphij# Quintana Roo; represented by Canc��n 232358787SruZone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 232475267Swollman -6:00 - CST 1981 Dec 23 232543543Swollman -5:00 Mexico E%sT 1998 Aug 2 2:00 232643543Swollman -6:00 Mexico C%sT 2327273438Sdelphij# Campeche, Yucat��n; represented by M��rida 232864499SwollmanZone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 232975267Swollman -6:00 - CST 1981 Dec 23 233064499Swollman -5:00 - EST 1982 Dec 2 233164499Swollman -6:00 Mexico C%sT 2332273438Sdelphij# Coahuila, Durango, Nuevo Le��n, Tamaulipas (near US border) 2333203019SedwinZone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2334203019Sedwin -6:00 - CST 1988 2335203019Sedwin -6:00 US C%sT 1989 2336203019Sedwin -6:00 Mexico C%sT 2010 2337203019Sedwin -6:00 US C%sT 2338273438Sdelphij# Coahuila, Durango, Nuevo Le��n, Tamaulipas (away from US border) 233975267SwollmanZone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 234064499Swollman -6:00 - CST 1988 234164499Swollman -6:00 US C%sT 1989 234264499Swollman -6:00 Mexico C%sT 234343014Swollman# Central Mexico 2344203019SedwinZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 23452742Swollman -7:00 - MST 1927 Jun 10 23:00 23462742Swollman -6:00 - CST 1930 Nov 15 23472742Swollman -7:00 - MST 1931 May 1 23:00 23482742Swollman -6:00 - CST 1931 Oct 234975267Swollman -7:00 - MST 1932 Apr 1 235086222Swollman -6:00 Mexico C%sT 2001 Sep 30 02:00 235193799Swollman -6:00 - CST 2002 Feb 20 235293799Swollman -6:00 Mexico C%sT 2353203019Sedwin# Chihuahua (near US border) 2354203019SedwinZone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2355203019Sedwin -7:00 - MST 1927 Jun 10 23:00 2356203019Sedwin -6:00 - CST 1930 Nov 15 2357203019Sedwin -7:00 - MST 1931 May 1 23:00 2358203019Sedwin -6:00 - CST 1931 Oct 2359203019Sedwin -7:00 - MST 1932 Apr 1 2360203019Sedwin -6:00 - CST 1996 2361203019Sedwin -6:00 Mexico C%sT 1998 2362203019Sedwin -6:00 - CST 1998 Apr Sun>=1 3:00 2363203019Sedwin -7:00 Mexico M%sT 2010 2364203019Sedwin -7:00 US M%sT 2365203019Sedwin# Chihuahua (away from US border) 236658787SruZone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 236743014Swollman -7:00 - MST 1927 Jun 10 23:00 236843014Swollman -6:00 - CST 1930 Nov 15 236943014Swollman -7:00 - MST 1931 May 1 23:00 237043014Swollman -6:00 - CST 1931 Oct 237175267Swollman -7:00 - MST 1932 Apr 1 237243014Swollman -6:00 - CST 1996 237343014Swollman -6:00 Mexico C%sT 1998 237443014Swollman -6:00 - CST 1998 Apr Sun>=1 3:00 237543014Swollman -7:00 Mexico M%sT 237658787Sru# Sonora 237758787SruZone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 237858787Sru -7:00 - MST 1927 Jun 10 23:00 237958787Sru -6:00 - CST 1930 Nov 15 238058787Sru -7:00 - MST 1931 May 1 23:00 238158787Sru -6:00 - CST 1931 Oct 238275267Swollman -7:00 - MST 1932 Apr 1 238364499Swollman -6:00 - CST 1942 Apr 24 238458787Sru -7:00 - MST 1949 Jan 14 238558787Sru -8:00 - PST 1970 238658787Sru -7:00 Mexico M%sT 1999 238758787Sru -7:00 - MST 2388207898Sedwin 2389207898Sedwin# From Alexander Krivenyshev (2010-04-21): 2390273438Sdelphij# According to news, Bah��a de Banderas (Mexican state of Nayarit) 2391207898Sedwin# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2392207898Sedwin# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2393207898Sedwin# 2394207898Sedwin# (Spanish) 2395273438Sdelphij# Bah��a de Banderas homologa su horario al del centro del 2396273438Sdelphij# pa��s, a partir de este domingo 2397207898Sedwin# http://www.nayarit.gob.mx/notes.asp?id=20748 2398207898Sedwin# 2399273438Sdelphij# Bah��a de Banderas homologa su horario con el del Centro del 2400273438Sdelphij# Pa��s 2401273438Sdelphij# 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 2402207898Sedwin# 2403207898Sedwin# (English) 2404273438Sdelphij# Puerto Vallarta and Bah��a de Banderas: One Time Zone 2405207898Sedwin# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2406207898Sedwin# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2407207898Sedwin# 2408207898Sedwin# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2409273438Sdelphij# will allow Bah��a de Banderas and Puerto Vallarta to share the same time 2410207898Sedwin# zone ..." 241164499Swollman# Baja California Sur, Nayarit, Sinaloa 2412207898Sedwin 2413207898Sedwin# From Arthur David Olson (2010-05-01): 2414207898Sedwin# Use "Bahia_Banderas" to keep the name to fourteen characters. 2415207898Sedwin 2416273438Sdelphij# Mazatl��n 24172742SwollmanZone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 24182742Swollman -7:00 - MST 1927 Jun 10 23:00 24192742Swollman -6:00 - CST 1930 Nov 15 24202742Swollman -7:00 - MST 1931 May 1 23:00 24212742Swollman -6:00 - CST 1931 Oct 242275267Swollman -7:00 - MST 1932 Apr 1 242364499Swollman -6:00 - CST 1942 Apr 24 24242742Swollman -7:00 - MST 1949 Jan 14 24252742Swollman -8:00 - PST 1970 242614343Swollman -7:00 Mexico M%sT 2427207898Sedwin 2428273438Sdelphij# Bah��a de Banderas 2429207898SedwinZone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2430207898Sedwin -7:00 - MST 1927 Jun 10 23:00 2431207898Sedwin -6:00 - CST 1930 Nov 15 2432207898Sedwin -7:00 - MST 1931 May 1 23:00 2433207898Sedwin -6:00 - CST 1931 Oct 2434207898Sedwin -7:00 - MST 1932 Apr 1 2435207898Sedwin -6:00 - CST 1942 Apr 24 2436207898Sedwin -7:00 - MST 1949 Jan 14 2437207898Sedwin -8:00 - PST 1970 2438210718Sedwin -7:00 Mexico M%sT 2010 Apr 4 2:00 2439207898Sedwin -6:00 Mexico C%sT 2440207898Sedwin 2441203019Sedwin# Baja California (near US border) 24422742SwollmanZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 244375267Swollman -7:00 - MST 1924 24442742Swollman -8:00 - PST 1927 Jun 10 23:00 244575267Swollman -7:00 - MST 1930 Nov 15 244675267Swollman -8:00 - PST 1931 Apr 1 244775267Swollman -8:00 1:00 PDT 1931 Sep 30 244864499Swollman -8:00 - PST 1942 Apr 24 2449158421Swollman -8:00 1:00 PWT 1945 Aug 14 23:00u 2450158421Swollman -8:00 1:00 PPT 1945 Nov 12 # Peace 245175267Swollman -8:00 - PST 1948 Apr 5 245275267Swollman -8:00 1:00 PDT 1949 Jan 14 245375267Swollman -8:00 - PST 1954 245475267Swollman -8:00 CA P%sT 1961 245575267Swollman -8:00 - PST 1976 245614343Swollman -8:00 US P%sT 1996 245775267Swollman -8:00 Mexico P%sT 2001 245893799Swollman -8:00 US P%sT 2002 Feb 20 2459203019Sedwin -8:00 Mexico P%sT 2010 2460203019Sedwin -8:00 US P%sT 2461203019Sedwin# Baja California (away from US border) 2462203019SedwinZone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2463203019Sedwin -7:00 - MST 1924 2464203019Sedwin -8:00 - PST 1927 Jun 10 23:00 2465203019Sedwin -7:00 - MST 1930 Nov 15 2466203019Sedwin -8:00 - PST 1931 Apr 1 2467203019Sedwin -8:00 1:00 PDT 1931 Sep 30 2468203019Sedwin -8:00 - PST 1942 Apr 24 2469203019Sedwin -8:00 1:00 PWT 1945 Aug 14 23:00u 2470203019Sedwin -8:00 1:00 PPT 1945 Nov 12 # Peace 2471203019Sedwin -8:00 - PST 1948 Apr 5 2472203019Sedwin -8:00 1:00 PDT 1949 Jan 14 2473203019Sedwin -8:00 - PST 1954 2474203019Sedwin -8:00 CA P%sT 1961 2475203019Sedwin -8:00 - PST 1976 2476203019Sedwin -8:00 US P%sT 1996 2477203019Sedwin -8:00 Mexico P%sT 2001 2478203019Sedwin -8:00 US P%sT 2002 Feb 20 247993799Swollman -8:00 Mexico P%sT 2480158421Swollman# From Paul Eggert (2006-03-22): 248175267Swollman# Formerly there was an America/Ensenada zone, which differed from 248275267Swollman# America/Tijuana only in that it did not observe DST from 1976 2483158421Swollman# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2484158421Swollman# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2485273438Sdelphij# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 2486158421Swollman# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 248775267Swollman# DST-observance was a town-by-town matter back then. This concerns 248875267Swollman# data after 1970 so most likely there should be at least one Zone 248975267Swollman# other than America/Tijuana for Baja, but it's not clear yet what its 249075267Swollman# name or contents should be. 24912742Swollman# 24922742Swollman# Revillagigedo Is 24932742Swollman# no information 24942742Swollman 24952742Swollman############################################################################### 24962742Swollman 24972742Swollman# Anguilla 2498273438Sdelphij# See America/Port_of_Spain. 24992742Swollman 25002742Swollman# Antigua and Barbuda 25012742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25022742SwollmanZone America/Antigua -4:07:12 - LMT 1912 Mar 2 25032742Swollman -5:00 - EST 1951 25042742Swollman -4:00 - AST 25052742Swollman 25062742Swollman# Bahamas 2507169811Swollman# 2508248310Sedwin# For 1899 Milne gives -5:09:29.5; round that. 2509248310Sedwin# 2510169811Swollman# From Sue Williams (2006-12-07): 2511169811Swollman# The Bahamas announced about a month ago that they plan to change their DST 2512169811Swollman# rules to sync with the U.S. starting in 2007.... 2513169811Swollman# http://www.jonesbahamas.com/?c=45&a=10412 2514169811Swollman 25152742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2516181421SedwinRule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2517181421SedwinRule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 25182742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2519248310SedwinZone America/Nassau -5:09:30 - LMT 1912 Mar 2 2520169811Swollman -5:00 Bahamas E%sT 1976 2521169811Swollman -5:00 US E%sT 25222742Swollman 25232742Swollman# Barbados 2524248310Sedwin 2525248310Sedwin# For 1899 Milne gives -3:58:29.2; round that. 2526248310Sedwin 25272742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 25282742SwollmanRule Barb 1977 only - Jun 12 2:00 1:00 D 25292742SwollmanRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 25302742SwollmanRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 25312742SwollmanRule Barb 1979 only - Sep 30 2:00 0 S 25322742SwollmanRule Barb 1980 only - Sep 25 2:00 0 S 25332742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2534248310SedwinZone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2535248310Sedwin -3:58:29 - BMT 1932 # Bridgetown Mean Time 25362742Swollman -4:00 Barb A%sT 25372742Swollman 25382742Swollman# Belize 2539158421Swollman# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 25402742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 25412742SwollmanRule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 25422742SwollmanRule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 25432742SwollmanRule Belize 1973 only - Dec 5 0:00 1:00 D 25442742SwollmanRule Belize 1974 only - Feb 9 0:00 0 S 25452742SwollmanRule Belize 1982 only - Dec 18 0:00 1:00 D 25462742SwollmanRule Belize 1983 only - Feb 12 0:00 0 S 25472742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25482742SwollmanZone America/Belize -5:52:48 - LMT 1912 Apr 25492742Swollman -6:00 Belize C%sT 25502742Swollman 25512742Swollman# Bermuda 2552163302Sru 2553248310Sedwin# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2554248310Sedwin# Bermuda dockyard, Ireland I; round that. 2555248310Sedwin 2556163302Sru# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2557163302Sru 2558163302Sru# Next year, however, clocks in the US will go forward on the second Sunday 2559163302Sru# in March, until the first Sunday in November. And, after the Time Zone 2560163302Sru# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2561163302Sru# Friday, the same thing will happen in Bermuda. 2562163302Sru# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2563163302Sru 25642742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2565248310SedwinZone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 25662742Swollman -4:00 - AST 1974 Apr 28 2:00 2567257682Sedwin -4:00 Canada A%sT 1976 2568163302Sru -4:00 US A%sT 25692742Swollman 25702742Swollman# Cayman Is 25712742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25722742SwollmanZone America/Cayman -5:25:32 - LMT 1890 # Georgetown 2573257682Sedwin -5:07:11 - KMT 1912 Feb # Kingston Mean Time 25742742Swollman -5:00 - EST 25752742Swollman 25762742Swollman# Costa Rica 2577248310Sedwin 2578273438Sdelphij# Milne gives -5:36:13.3 as San Jos�� mean time; round to nearest. 2579248310Sedwin 25802742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 25812742SwollmanRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 25822742SwollmanRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 258320094SwollmanRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2584158421Swollman# IATA SSIM (1991-09) says the following was at 1:00; 2585158421Swollman# go with Shanks & Pottenger. 258620094SwollmanRule CR 1991 only - Jul 1 0:00 0 S 258720094SwollmanRule CR 1992 only - Mar 15 0:00 0 S 2588273438Sdelphij# There are too many San Jos��s elsewhere, so we'll use 'Costa Rica'. 25892742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2590273438SdelphijZone America/Costa_Rica -5:36:13 - LMT 1890 # San Jos�� 2591273438Sdelphij -5:36:13 - SJMT 1921 Jan 15 # San Jos�� Mean Time 25922742Swollman -6:00 CR C%sT 25932742Swollman# Coco 25942742Swollman# no information; probably like America/Costa_Rica 25952742Swollman 25962742Swollman# Cuba 25972742Swollman 2598248310Sedwin# From Paul Eggert (2013-02-21): 2599248310Sedwin# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2600248310Sedwin# for the port, and -5:30 for meteorological observations. 2601248310Sedwin# For now, stick with Shanks & Pottenger. 2602248310Sedwin 260358787Sru# From Arthur David Olson (1999-03-29): 260458787Sru# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 260558787Sru# the Cuban National Team and the Baltimore Orioles was carried live on 260658787Sru# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 260758787Sru# During the game, play-by-play announcer Jim Hunter noted that 260858787Sru# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 260958787Sru# Time today." (The "two hour" remark referred to losing one hour of 2610273438Sdelphij# sleep on 1999-03-28 - when the announcers were in Cuba as it switched 2611273438Sdelphij# to DST - and one more hour on 1999-04-04 - when the announcers will have 261258787Sru# returned to Baltimore, which switches on that date.) 26132742Swollman 2614259630Sedwin# From Steffen Thorsen (2013-11-11): 2615259630Sedwin# DST start in Cuba in 2004 ... does not follow the same rules as the 2616259630Sedwin# years before. The correct date should be Sunday 2004-03-28 00:00 ... 2617259630Sedwin# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 2618259630Sedwin 2619138323Swollman# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2620138323Swollman# Cuba is not going back to standard time this year. 2621158421Swollman# From Paul Eggert (2006-03-22): 2622138323Swollman# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2623138323Swollman# says that it's due to a problem at the Antonio Guiteras 2624138323Swollman# thermoelectric plant, and says "This October there will be no return 2625138323Swollman# to normal hours (after daylight saving time)". 2626158421Swollman# For now, let's assume that it's a temporary measure. 2627138323Swollman 2628153670Swollman# From Carlos A. Carnero Delgado (2005-11-12): 2629153670Swollman# This year (just like in 2004-2005) there's no change in time zone 2630153670Swollman# adjustment in Cuba. We will stay in daylight saving time: 2631153670Swollman# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2632153670Swollman 2633273438Sdelphij# From Jesper N��rgaard Welen (2006-10-21): 2634169811Swollman# An article in GRANMA INTERNACIONAL claims that Cuba will end 2635169811Swollman# the 3 years of permanent DST next weekend, see 2636169811Swollman# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2637169811Swollman# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2638273438Sdelphij# watches should be set back one hour - going back to 00:00 hours - returning 2639169811Swollman# to the normal schedule.... 2640163302Sru 2641169811Swollman# From Paul Eggert (2007-03-02): 2642273438Sdelphij# <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday, 2643169811Swollman# says Cuban clocks will advance at midnight on March 10. 2644169811Swollman# For lack of better information, assume Cuba will use US rules, 2645169811Swollman# except that it switches at midnight standard time as usual. 2646173319Sedwin# 2647173319Sedwin# From Steffen Thorsen (2007-10-25): 2648240461Sedwin# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2649173319Sedwin# earlier - on the last Sunday of October, just like in 2006. 2650240461Sedwin# 2651173319Sedwin# He supplied these references: 2652240461Sedwin# 2653173319Sedwin# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2654173319Sedwin# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2655240461Sedwin# 2656273438Sdelphij# From Alex Krivenyshev (2007-10-25): 2657173319Sedwin# Here is also article from Granma (Cuba): 2658240461Sedwin# 2659273438Sdelphij# Regir�� el Horario Normal desde el pr��ximo domingo 28 de octubre 2660173319Sedwin# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2661240461Sedwin# 2662173319Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2663169811Swollman 2664177591Sedwin# From Arthur David Olson (2008-03-09): 2665177591Sedwin# I'm in Maryland which is now observing United States Eastern Daylight 2666177591Sedwin# Time. At 9:44 local time I used RealPlayer to listen to 2667177591Sedwin# http://media.enet.cu/radioreloj 2668273438Sdelphij# a Cuban information station, and heard 2669177591Sedwin# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2670177591Sedwin# indicating that Cuba is still on standard time. 2671177591Sedwin 2672177591Sedwin# From Steffen Thorsen (2008-03-12): 2673177591Sedwin# It seems that Cuba will start DST on Sunday, 2007-03-16... 2674177591Sedwin# It was announced yesterday, according to this source (in Spanish): 2675177591Sedwin# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2676177591Sedwin# 2677177591Sedwin# Some more background information is posted here: 2678177591Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2679177591Sedwin# 2680177591Sedwin# The article also says that Cuba has been observing DST since 1963, 2681177591Sedwin# while Shanks (and tzdata) has 1965 as the first date (except in the 2682177591Sedwin# 1940's). Many other web pages in Cuba also claim that it has been 2683177591Sedwin# observed since 1963, but with the exception of 1970 - an exception 2684177591Sedwin# which is not present in tzdata/Shanks. So there is a chance we need to 2685177591Sedwin# change some historic records as well. 2686177591Sedwin# 2687177591Sedwin# One example: 2688177591Sedwin# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2689177591Sedwin 2690273438Sdelphij# From Jesper N��rgaard Welen (2008-03-13): 2691177591Sedwin# The Cuban time change has just been confirmed on the most authoritative 2692177591Sedwin# web site, the Granma. Please check out 2693177591Sedwin# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2694177591Sedwin# 2695273438Sdelphij# Basically as expected after Steffen Thorsen's information, the change 2696177591Sedwin# will take place midnight between Saturday and Sunday. 2697177591Sedwin 2698177591Sedwin# From Arthur David Olson (2008-03-12): 2699177591Sedwin# Assume Sun>=15 (third Sunday) going forward. 2700177591Sedwin 2701189923Sedwin# From Alexander Krivenyshev (2009-03-04) 2702189923Sedwin# According to the Radio Reloj - Cuba will start Daylight Saving Time on 2703189923Sedwin# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2704189923Sedwin# not on midnight March 14 / March 15 as previously thought. 2705189923Sedwin# 2706189923Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2707189923Sedwin# (in Spanish) 2708189923Sedwin 2709189923Sedwin# From Arthur David Olson (2009-03-09) 2710189923Sedwin# I listened over the Internet to 2711189923Sedwin# http://media.enet.cu/readioreloj 2712189923Sedwin# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2713273438Sdelphij# the time was announced as "diez cinco" - the same time as here, indicating 2714189923Sedwin# that has indeed switched to DST. Assume second Sunday from 2009 forward. 2715189923Sedwin 2716219687Sedwin# From Steffen Thorsen (2011-03-08): 2717219687Sedwin# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2718219687Sedwin# this year. Nothing about the end date known so far (if that has 2719219687Sedwin# changed at all). 2720219687Sedwin# 2721219687Sedwin# Source: 2722219687Sedwin# http://granma.co.cu/2011/03/08/nacional/artic01.html 2723219687Sedwin# 2724219687Sedwin# Our info: 2725219687Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2726233446Sedwin# 2727233446Sedwin# From Steffen Thorsen (2011-10-30) 2728240461Sedwin# Cuba will end DST two weeks later this year. Instead of going back 2729233446Sedwin# tonight, it has been delayed to 2011-11-13 at 01:00. 2730233446Sedwin# 2731233446Sedwin# One source (Spanish) 2732233446Sedwin# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2733233446Sedwin# 2734233446Sedwin# Our page: 2735233446Sedwin# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2736240461Sedwin# 2737240461Sedwin# From Steffen Thorsen (2012-03-01) 2738240461Sedwin# According to Radio Reloj, Cuba will start DST on Midnight between March 2739240461Sedwin# 31 and April 1. 2740240461Sedwin# 2741240461Sedwin# Radio Reloj has the following info (Spanish): 2742240461Sedwin# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2743240461Sedwin# 2744240461Sedwin# Our info on it: 2745240461Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2746219687Sedwin 2747242932Sedwin# From Steffen Thorsen (2012-11-03): 2748242932Sedwin# Radio Reloj and many other sources report that Cuba is changing back 2749242932Sedwin# to standard time on 2012-11-04: 2750242932Sedwin# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2751242932Sedwin# From Paul Eggert (2012-11-03): 2752242932Sedwin# For now, assume the future rule is first Sunday in November. 2753242932Sedwin 27542742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 27552742SwollmanRule Cuba 1928 only - Jun 10 0:00 1:00 D 27562742SwollmanRule Cuba 1928 only - Oct 10 0:00 0 S 27572742SwollmanRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 27582742SwollmanRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 27592742SwollmanRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 27602742SwollmanRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 27612742SwollmanRule Cuba 1965 only - Jun 1 0:00 1:00 D 27622742SwollmanRule Cuba 1965 only - Sep 30 0:00 0 S 27632742SwollmanRule Cuba 1966 only - May 29 0:00 1:00 D 27642742SwollmanRule Cuba 1966 only - Oct 2 0:00 0 S 27652742SwollmanRule Cuba 1967 only - Apr 8 0:00 1:00 D 27662742SwollmanRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 27672742SwollmanRule Cuba 1968 only - Apr 14 0:00 1:00 D 27682742SwollmanRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 27692742SwollmanRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 27702742SwollmanRule Cuba 1972 1974 - Oct 8 0:00 0 S 27712742SwollmanRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 27722742SwollmanRule Cuba 1978 only - May 7 0:00 1:00 D 277330711SwollmanRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 27742742SwollmanRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 27752742SwollmanRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 27762742SwollmanRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 277743014SwollmanRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 277820094SwollmanRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 277943014SwollmanRule Cuba 1996 only - Oct 6 0:00s 0 S 278043014SwollmanRule Cuba 1997 only - Oct 12 0:00s 0 S 278158787SruRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2782138323SwollmanRule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2783259630SedwinRule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 2784259630SedwinRule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 2785233446SedwinRule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 2786177591SedwinRule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2787189923SedwinRule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2788219687SedwinRule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 2789219687SedwinRule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 2790233446SedwinRule Cuba 2011 only - Nov 13 0:00s 0 S 2791240461SedwinRule Cuba 2012 only - Apr 1 0:00s 1:00 D 2792242932SedwinRule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 2793240461SedwinRule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 27942742Swollman 27952742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 27962742SwollmanZone America/Havana -5:29:28 - LMT 1890 279758787Sru -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 27982742Swollman -5:00 Cuba C%sT 27992742Swollman 28002742Swollman# Dominica 2801273438Sdelphij# See America/Port_of_Spain. 28022742Swollman 28032742Swollman# Dominican Republic 280475267Swollman 280575267Swollman# From Steffen Thorsen (2000-10-30): 280675267Swollman# Enrique Morales reported to me that the Dominican Republic has changed the 280775267Swollman# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 280875267Swollman# http://www.listin.com.do/antes/261000/republica/princi.html 280975267Swollman 281075267Swollman# From Paul Eggert (2000-12-04): 281175267Swollman# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 281275267Swollman 281375267Swollman# From Rives McDow (2000-12-01): 281475267Swollman# Dominican Republic changed its mind and presidential decree on Tuesday, 281575267Swollman# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 281675267Swollman# Dominican Republic will be reverting to 8 hours from the International Date 281775267Swollman# Line, and will not be using DST in the foreseeable future. The reason they 281875267Swollman# decided to use DST was to be in synch with Puerto Rico, who was also going 281975267Swollman# to implement DST. When Puerto Rico didn't implement DST, the president 282075267Swollman# decided to revert. 282175267Swollman 282275267Swollman 28232742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 28242742SwollmanRule DR 1966 only - Oct 30 0:00 1:00 D 28252742SwollmanRule DR 1967 only - Feb 28 0:00 0 S 28262742SwollmanRule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 28272742SwollmanRule DR 1970 only - Feb 21 0:00 0 S 28282742SwollmanRule DR 1971 only - Jan 20 0:00 0 S 28292742SwollmanRule DR 1972 1974 - Jan 21 0:00 0 S 28302742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28312742SwollmanZone America/Santo_Domingo -4:39:36 - LMT 1890 28322742Swollman -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 28332742Swollman -5:00 DR E%sT 1974 Oct 27 283475267Swollman -4:00 - AST 2000 Oct 29 02:00 283575267Swollman -5:00 US E%sT 2000 Dec 3 01:00 28362742Swollman -4:00 - AST 28372742Swollman 28382742Swollman# El Salvador 2839158421Swollman 28402742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 28412742SwollmanRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 28422742SwollmanRule Salv 1987 1988 - Sep lastSun 0:00 0 S 2843121098Swollman# There are too many San Salvadors elsewhere, so use America/El_Salvador 2844121098Swollman# instead of America/San_Salvador. 28452742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28462742SwollmanZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 28472742Swollman -6:00 Salv C%sT 28482742Swollman 28492742Swollman# Grenada 28502742Swollman# Guadeloupe 2851273438Sdelphij# St Barth��lemy 2852174242Sedwin# St Martin (French part) 2853273438Sdelphij# See America/Port_of_Spain. 28542742Swollman 28552742Swollman# Guatemala 2856158421Swollman# 2857158421Swollman# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2858158421Swollman# Diario Co Latino, at 2859273438Sdelphij# <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>, 2860158421Swollman# says in an article dated 2006-04-19 that the Guatemalan government had 2861158421Swollman# decided on that date to advance official time by 60 minutes, to lessen the 2862158421Swollman# impact of the elevated cost of oil.... Daylight saving time will last from 2863158421Swollman# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2864163302Sru# From Paul Eggert (2006-06-22): 2865163302Sru# The Ministry of Energy and Mines, press release CP-15/2006 2866163302Sru# (2006-04-19), says DST ends at 24:00. See 2867163302Sru# <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>. 2868163302Sru 28692742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 28702742SwollmanRule Guat 1973 only - Nov 25 0:00 1:00 D 28712742SwollmanRule Guat 1974 only - Feb 24 0:00 0 S 28722742SwollmanRule Guat 1983 only - May 21 0:00 1:00 D 28732742SwollmanRule Guat 1983 only - Sep 22 0:00 0 S 287420094SwollmanRule Guat 1991 only - Mar 23 0:00 1:00 D 287520094SwollmanRule Guat 1991 only - Sep 7 0:00 0 S 2876158421SwollmanRule Guat 2006 only - Apr 30 0:00 1:00 D 2877158421SwollmanRule Guat 2006 only - Oct 1 0:00 0 S 28782742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28792742SwollmanZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 28802742Swollman -6:00 Guat C%sT 28812742Swollman 28822742Swollman# Haiti 2883149514Swollman# From Gwillim Law (2005-04-15): 2884273438Sdelphij# Risto O. Nyk��nen wrote me that Haiti is now on DST. 2885273438Sdelphij# I searched for confirmation, and I found a press release 2886149514Swollman# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 2887273438Sdelphij# <http://www.haitianconsulate.org/time.doc>. Translated from French, it says: 2888149514Swollman# 2889149514Swollman# "The Prime Minister's Communication Office notifies the public in general 2890149514Swollman# and the press in particular that, following a decision of the Interior 2891149514Swollman# Ministry and the Territorial Collectivities [I suppose that means the 2892149514Swollman# provinces], Haiti will move to Eastern Daylight Time in the night from next 2893149514Swollman# Saturday the 2nd to Sunday the 3rd. 2894149514Swollman# 2895149514Swollman# "Consequently, the Prime Minister's Communication Office wishes to inform 2896149514Swollman# the population that the country's clocks will be set forward one hour 2897149514Swollman# starting at midnight. This provision will hold until the last Saturday in 2898149514Swollman# October 2005. 2899149514Swollman# 2900149514Swollman# "Port-au-Prince, March 31, 2005" 2901158421Swollman# 2902158421Swollman# From Steffen Thorsen (2006-04-04): 2903158421Swollman# I have been informed by users that Haiti observes DST this year like 2904158421Swollman# last year, so the current "only" rule for 2005 might be changed to a 2905158421Swollman# "max" rule or to last until 2006. (Who knows if they will observe DST 2906158421Swollman# next year or if they will extend their DST like US/Canada next year). 2907158421Swollman# 2908158421Swollman# I have found this article about it (in French): 2909158421Swollman# http://www.haitipressnetwork.com/news.cfm?articleID=7612 2910158421Swollman# 2911158421Swollman# The reason seems to be an energy crisis. 2912149514Swollman 2913169811Swollman# From Stephen Colebourne (2007-02-22): 2914169811Swollman# Some IATA info: Haiti won't be having DST in 2007. 2915158421Swollman 2916240461Sedwin# From Steffen Thorsen (2012-03-11): 2917240461Sedwin# According to several news sources, Haiti will observe DST this year, 2918240461Sedwin# apparently using the same start and end date as USA/Canada. 2919240461Sedwin# So this means they have already changed their time. 2920240461Sedwin# 2921240461Sedwin# http://www.alterpresse.org/spip.php?article12510 2922240461Sedwin# http://radiovision2000haiti.net/home/?p=13253 2923240461Sedwin# 2924240461Sedwin# From Arthur David Olson (2012-03-11): 2925240461Sedwin# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 2926240461Sedwin# 3:00 a.m. rather than the traditional Haitian jump at midnight. 2927248310Sedwin# Assume a US-style fall back as well. 2928240461Sedwin 2929248310Sedwin# From Steffen Thorsen (2013-03-10): 2930248310Sedwin# It appears that Haiti is observing DST this year as well, same rules 2931248310Sedwin# as US/Canada. They did it last year as well, and it looks like they 2932248310Sedwin# are going to observe DST every year now... 2933248310Sedwin# 2934248310Sedwin# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 2935248310Sedwin# http://www.canalplushaiti.net/?p=6714 2936248310Sedwin 29372742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 29382742SwollmanRule Haiti 1983 only - May 8 0:00 1:00 D 29392742SwollmanRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 29402742SwollmanRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 2941158421Swollman# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 2942158421Swollman# Go with IATA. 294343014SwollmanRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 294443014SwollmanRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 2945169811SwollmanRule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 2946169811SwollmanRule Haiti 2005 2006 - Oct lastSun 0:00 0 S 2947248310SedwinRule Haiti 2012 max - Mar Sun>=8 2:00 1:00 D 2948248310SedwinRule Haiti 2012 max - Nov Sun>=1 2:00 0 S 29492742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29502742SwollmanZone America/Port-au-Prince -4:49:20 - LMT 1890 29512742Swollman -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 29522742Swollman -5:00 Haiti E%sT 29532742Swollman 29542742Swollman# Honduras 2955158421Swollman# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 2956158421Swollman 2957158421Swollman# From Paul Eggert (2006-05-05): 2958158421Swollman# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 2959158421Swollman# saying Honduras will start using DST midnight Saturday, effective 4 2960158421Swollman# months until September. La Tribuna reported today 2961158421Swollman# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 2962163302Sru# of Honduras, refused to back down on this. 2963158421Swollman 2964273438Sdelphij# From Jesper N��rgaard Welen (2006-08-08): 2965163302Sru# It seems that Honduras has returned from DST to standard time this Monday at 2966163302Sru# 00:00 hours (prolonging Sunday to 25 hours duration). 2967163302Sru# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 2968163302Sru 2969163302Sru# From Paul Eggert (2006-08-08): 2970163302Sru# Also see Diario El Heraldo, The country returns to standard time (2006-08-08) 2971163302Sru# <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>. 2972163302Sru# It mentions executive decree 18-2006. 2973163302Sru 2974163302Sru# From Steffen Thorsen (2006-08-17): 2975163302Sru# Honduras will observe DST from 2007 to 2009, exact dates are not 2976163302Sru# published, I have located this authoritative source: 2977163302Sru# http://www.presidencia.gob.hn/noticia.aspx?nId=47 2978163302Sru 2979169811Swollman# From Steffen Thorsen (2007-03-30): 2980169811Swollman# http://www.laprensahn.com/pais_nota.php?id04962=7386 2981169811Swollman# So it seems that Honduras will not enter DST this year.... 2982169811Swollman 2983158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2984158421SwollmanRule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 2985158421SwollmanRule Hond 1987 1988 - Sep lastSun 0:00 0 S 2986169811SwollmanRule Hond 2006 only - May Sun>=1 0:00 1:00 D 2987169811SwollmanRule Hond 2006 only - Aug Mon>=1 0:00 0 S 29882742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29892742SwollmanZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 2990158421Swollman -6:00 Hond C%sT 299143543Swollman# 299243543Swollman# Great Swan I ceded by US to Honduras in 1972 29932742Swollman 29942742Swollman# Jamaica 2995257682Sedwin# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 2996257682Sedwin# unspecified official document, and says "This time is used throughout the 2997257682Sedwin# island". Go with Milne. Round to the nearest second as required by zic. 29982742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2999257682SedwinZone America/Jamaica -5:07:11 - LMT 1890 # Kingston 3000257682Sedwin -5:07:11 - KMT 1912 Feb # Kingston Mean Time 300158787Sru -5:00 - EST 1974 Apr 28 2:00 300220094Swollman -5:00 US E%sT 1984 300320094Swollman -5:00 - EST 30042742Swollman 30052742Swollman# Martinique 30062742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 30072742SwollmanZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 300886222Swollman -4:04:20 - FFMT 1911 May # Fort-de-France MT 30092742Swollman -4:00 - AST 1980 Apr 6 30102742Swollman -4:00 1:00 ADT 1980 Sep 28 30112742Swollman -4:00 - AST 30122742Swollman 30132742Swollman# Montserrat 3014273438Sdelphij# See America/Port_of_Spain. 30152742Swollman 30162742Swollman# Nicaragua 301743543Swollman# 3018158421Swollman# This uses Shanks & Pottenger for times before 2005. 301943543Swollman# 3020149514Swollman# From Steffen Thorsen (2005-04-12): 3021149514Swollman# I've got reports from 8 different people that Nicaragua just started 3022149514Swollman# DST on Sunday 2005-04-10, in order to save energy because of 3023149514Swollman# expensive petroleum. The exact end date for DST is not yet 3024149514Swollman# announced, only "September" but some sites also say "mid-September". 3025149514Swollman# Some background information is available on the President's official site: 3026149514Swollman# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3027149514Swollman# The Decree, no 23-2005 is available here: 3028149514Swollman# 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 3029149514Swollman# 3030149514Swollman# From Paul Eggert (2005-05-01): 3031149514Swollman# The decree doesn't say anything about daylight saving, but for now let's 3032158421Swollman# assume that it is daylight saving.... 3033149514Swollman# 3034149514Swollman# From Gwillim Law (2005-04-21): 3035149514Swollman# The Associated Press story on the time change, which can be found at 3036149514Swollman# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3037149514Swollman# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3038149514Swollman# time that a change of clocks was applied to save energy was in the year 2000 3039273438Sdelphij# during the Arnoldo Alem��n administration."... 3040149514Swollman# The northamerica file says that Nicaragua has been on UTC-6 continuously 3041149514Swollman# since December 1998. I wasn't able to find any details of Nicaraguan time 3042149514Swollman# changes in 2000. Perhaps a note could be added to the northamerica file, to 3043149514Swollman# the effect that we have indirect evidence that DST was observed in 2000. 3044149514Swollman# 3045273438Sdelphij# From Jesper N��rgaard Welen (2005-11-02): 3046153670Swollman# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3047153670Swollman# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3048153670Swollman# (2005-09-26) 3049153670Swollman# 3050273438Sdelphij# From Jesper N��rgaard Welen (2006-05-05): 3051158421Swollman# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3052158421Swollman# (my informal translation) 3053273438Sdelphij# By order of the president of the republic, Enrique Bola��os, Nicaragua 3054158421Swollman# advanced by sixty minutes their official time, yesterday at 2 in the 3055273438Sdelphij# morning, and will stay that way until 30th of September. 3056158421Swollman# 3057273438Sdelphij# From Jesper N��rgaard Welen (2006-09-30): 3058163302Sru# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3059163302Sru# My informal translation runs: 3060163302Sru# The natural sun time is restored in all the national territory, in that the 3061163302Sru# time is returned one hour at 01:00 am of October 1 of 2006. 3062163302Sru# 30632742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 30642742SwollmanRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 30652742SwollmanRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3066149514SwollmanRule Nic 2005 only - Apr 10 0:00 1:00 D 3067163302SruRule Nic 2005 only - Oct Sun>=1 0:00 0 S 3068158421SwollmanRule Nic 2006 only - Apr 30 2:00 1:00 D 3069163302SruRule Nic 2006 only - Oct Sun>=1 1:00 0 S 30702742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 30712742SwollmanZone America/Managua -5:45:08 - LMT 1890 307286222Swollman -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 30732742Swollman -6:00 - CST 1973 May 30742742Swollman -5:00 - EST 1975 Feb 16 3075158421Swollman -6:00 Nic C%sT 1992 Jan 1 4:00 3076158421Swollman -5:00 - EST 1992 Sep 24 3077158421Swollman -6:00 - CST 1993 3078158421Swollman -5:00 - EST 1997 3079149514Swollman -6:00 Nic C%sT 30802742Swollman 30812742Swollman# Panama 30822742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 30832742SwollmanZone America/Panama -5:18:08 - LMT 1890 3084273438Sdelphij -5:19:36 - CMT 1908 Apr 22 # Col��n Mean Time 30852742Swollman -5:00 - EST 30862742Swollman 30872742Swollman# Puerto Rico 3088257682Sedwin# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 30892742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 309014343SwollmanZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 30912742Swollman -4:00 - AST 1942 May 3 3092158421Swollman -4:00 US A%sT 1946 30932742Swollman -4:00 - AST 30942742Swollman 30952742Swollman# St Kitts-Nevis 30962742Swollman# St Lucia 3097273438Sdelphij# See America/Port_of_Spain. 30982742Swollman 30992742Swollman# St Pierre and Miquelon 3100257682Sedwin# There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 31012742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 31022742SwollmanZone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 31032742Swollman -4:00 - AST 1980 May 3104121098Swollman -3:00 - PMST 1987 # Pierre & Miquelon Time 3105121098Swollman -3:00 Canada PM%sT 31062742Swollman 31072742Swollman# St Vincent and the Grenadines 3108273438Sdelphij# See America/Port_of_Spain. 31092742Swollman 31102742Swollman# Turks and Caicos 3111169811Swollman# 3112169811Swollman# From Chris Dunn in 3113169811Swollman# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007> 3114169811Swollman# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3115169811Swollman# daylight saving dates for time changes have been adjusted to match 3116169811Swollman# the recent U.S. change of dates. 3117169811Swollman# 3118169811Swollman# From Brian Inglis (2007-04-28): 3119169811Swollman# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3120169811Swollman# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3121169811Swollman# rows before that there is an out of date entry for Oct: 3122169811Swollman# "Eastern Standard Times Begins 2007 3123169811Swollman# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3124169811Swollman# indicating that the normal ET rules are followed. 3125169811Swollman# 3126169811Swollman# From Paul Eggert (2006-05-01): 3127158421Swollman# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) 3128169811Swollman# says they switch at midnight. Go with Shanks & Pottenger. 3129169811Swollman# 313020094Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3131169811SwollmanRule TC 1979 1986 - Apr lastSun 2:00 1:00 D 3132169811SwollmanRule TC 1979 2006 - Oct lastSun 2:00 0 S 3133169811SwollmanRule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D 3134169811SwollmanRule TC 2007 max - Mar Sun>=8 2:00 1:00 D 3135169811SwollmanRule TC 2007 max - Nov Sun>=1 2:00 0 S 31362742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 31372742SwollmanZone America/Grand_Turk -4:44:32 - LMT 1890 3138257682Sedwin -5:07:11 - KMT 1912 Feb # Kingston Mean Time 313920094Swollman -5:00 TC E%sT 31408029Swollman 314114343Swollman# British Virgin Is 314214343Swollman# Virgin Is 3143273438Sdelphij# See America/Port_of_Spain. 3144273438Sdelphij 3145273438Sdelphij 3146273438Sdelphij# Local Variables: 3147273438Sdelphij# coding: utf-8 3148273438Sdelphij# End: 3149