northamerica revision 263042
1153761Swollman# <pre> 2192886Sedwin# This file is in the public domain, so clarified as of 3192886Sedwin# 2009-05-17 by Arthur David Olson. 4153761Swollman 52742Swollman# also includes Central America and the Caribbean 62742Swollman 72742Swollman# This data is by no means authoritative; if you think you know better, 82742Swollman# go ahead and edit the file (and please send any changes to 9243020Sedwin# tz@iana.org for general use in the future). 102742Swollman 11149514Swollman# From Paul Eggert (1999-03-22): 122742Swollman# A reliable and entertaining source about time zones is 1358787Sru# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 142742Swollman 152742Swollman############################################################################### 162742Swollman 172742Swollman# United States 182742Swollman 1958787Sru# From Paul Eggert (1999-03-31): 2058787Sru# Howse writes (pp 121-125) that time zones were invented by 2158787Sru# Professor Charles Ferdinand Dowd (1825-1904), 2258787Sru# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 23257682Sedwin# His pamphlet "A System of National Time for Railroads" (1870) 2458787Sru# was the result of his proposals at the Convention of Railroad Trunk Lines 2558787Sru# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 2658787Sru# but in 1872-05 he moved the proposed origin to Greenwich. 2758787Sru# His proposal was adopted by the railroads on 1883-11-18 at 12:00, 2858787Sru# and the most of the country soon followed suit. 2958787Sru 30149514Swollman# From Paul Eggert (2005-04-16): 31149514Swollman# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 32149514Swollman# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 33149514Swollman 34158421Swollman# From Paul Eggert (2006-03-22): 3514343Swollman# A good source for time zone historical data in the US is 3614343Swollman# Thomas G. Shanks, The American Atlas (5th edition), 3714343Swollman# San Diego: ACS Publications, Inc. (1991). 3814343Swollman# Make sure you have the errata sheet; the book is somewhat useless without it. 39158421Swollman# It is the source for most of the pre-1991 US entries below. 4014343Swollman 4175267Swollman# From Paul Eggert (2001-03-06): 4217200Swollman# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 43257682Sedwin# in his whimsical essay "An Economical Project for Diminishing the Cost 44257682Sedwin# of Light" published in the Journal de Paris (1784-04-26). 4517200Swollman# Not everyone is happy with the results: 4617200Swollman# 4717200Swollman# I don't really care how time is reckoned so long as there is some 4817200Swollman# agreement about it, but I object to being told that I am saving 4917200Swollman# daylight when my reason tells me that I am doing nothing of the kind. 5017200Swollman# I even object to the implication that I am wasting something 5117200Swollman# valuable if I stay in bed after the sun has risen. As an admirer 5217200Swollman# of moonlight I resent the bossy insistence of those who want to 5317200Swollman# reduce my time for enjoying it. At the back of the Daylight Saving 5417200Swollman# scheme I detect the bony, blue-fingered hand of Puritanism, eager 5517200Swollman# to push people into bed earlier, and get them up earlier, to make 5617200Swollman# them healthy, wealthy and wise in spite of themselves. 5717200Swollman# 58149514Swollman# -- Robertson Davies, The diary of Samuel Marchbanks, 59149514Swollman# Clarke, Irwin (1947), XIX, Sunday 6075267Swollman# 6175267Swollman# For more about the first ten years of DST in the United States, see 6275267Swollman# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html"> 6375267Swollman# Ten years of daylight saving from the Pittsburgh standpoint 6475267Swollman# (Carnegie Library of Pittsburgh, 1927)</a>. 6575267Swollman# 6675267Swollman# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 6775267Swollman# However, DST was imposed by the Standard Time Act of 1918, which 6875267Swollman# was the first nationwide legal time standard, and apparently 6975267Swollman# time was just called "Standard Time" or "Daylight Saving Time". 7017200Swollman 712742Swollman# From Arthur David Olson: 722742Swollman# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 7319878Swollman# See, for example, the front page of the Saturday, 1974-10-26 7419878Swollman# and Sunday, 1974-10-27 editions of the Washington Post. 752742Swollman 762742Swollman# From Arthur David Olson: 772742Swollman# Before the Uniform Time Act of 1966 took effect in 1967, observance of 782742Swollman# Daylight Saving Time in the US was by local option, except during wartime. 792742Swollman 8067578Swollman# From Arthur David Olson (2000-09-25): 8167578Swollman# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 8267578Swollman# In the introduction, Oboler spoke of "Eastern Peace Time." 8367578Swollman# An AltaVista search turned up 8467578Swollman# <a href="http://rowayton.org/rhs/hstaug45.html">: 8567578Swollman# "When the time is announced over the radio now, it is 'Eastern Peace 8667578Swollman# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 8767578Swollman# </a> (August 1945) by way of confirmation. 8867578Swollman 89149514Swollman# From Joseph Gallant citing 9067578Swollman# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 9167578Swollman# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 9286222Swollman# to switch to London for Attlee's address, but the American people 9367578Swollman# never got to hear his speech live. According to one press account, 9467578Swollman# CBS' Bob Trout was first to announce the word of Japan's surrender, 9567578Swollman# but a few seconds later, NBC, ABC and Mutual also flashed the word 9667578Swollman# of surrender, all of whom interrupting the bells of Big Ben in 9786222Swollman# London which were to precede Mr. Attlee's speech. 9867578Swollman 99114173Swollman# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 100114173Swollman# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 101114173Swollman# 102114173Swollman# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 103114173Swollman# Any announcement from Asia would reach St. John's New York newsroom on a 104114173Swollman# wire service teletype machine, which had prescribed signals for major news. 105114173Swollman# Associated Press, for example, would ring five bells before spewing out 106114173Swollman# typed copy of an important story, and 10 bells for news "of transcendental 107114173Swollman# importance." 108114173Swollman# 109114173Swollman# On Aug. 14, stalling while talking steadily into the NBC networks' open 110114173Swollman# microphone, St. John heard five bells and waited only to hear a sixth bell, 111114173Swollman# before announcing confidently: "Ladies and gentlemen, World War II is over. 112114173Swollman# The Japanese have agreed to our surrender terms." 113114173Swollman# 114114173Swollman# He had scored a 20-second scoop on other broadcasters. 115114173Swollman 116149590Swollman# From Arthur David Olson (2005-08-22): 117149590Swollman# Paul has been careful to use the "US" rules only in those locations 118149590Swollman# that are part of the United States; this reflects the real scope of 119149590Swollman# U.S. government action. So even though the "US" rules have changed 120149590Swollman# in the latest release, other countries won't be affected. 121149590Swollman 1222742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 12375267SwollmanRule US 1918 1919 - Mar lastSun 2:00 1:00 D 1242742SwollmanRule US 1918 1919 - Oct lastSun 2:00 0 S 1252742SwollmanRule US 1942 only - Feb 9 2:00 1:00 W # War 12667578SwollmanRule US 1945 only - Aug 14 23:00u 1:00 P # Peace 1272742SwollmanRule US 1945 only - Sep 30 2:00 0 S 128149514SwollmanRule US 1967 2006 - Oct lastSun 2:00 0 S 1292742SwollmanRule US 1967 1973 - Apr lastSun 2:00 1:00 D 1302742SwollmanRule US 1974 only - Jan 6 2:00 1:00 D 1312742SwollmanRule US 1975 only - Feb 23 2:00 1:00 D 1322742SwollmanRule US 1976 1986 - Apr lastSun 2:00 1:00 D 133149514SwollmanRule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 134149514SwollmanRule US 2007 max - Mar Sun>=8 2:00 1:00 D 135149514SwollmanRule US 2007 max - Nov Sun>=1 2:00 0 S 1362742Swollman 137153761Swollman# From Arthur David Olson, 2005-12-19 138153761Swollman# We generate the files specified below to guard against old files with 139153761Swollman# obsolete information being left in the time zone binary directory. 140153761Swollman# We limit the list to names that have appeared in previous versions of 141153761Swollman# this time zone package. 142153761Swollman# We do these as separate Zones rather than as Links to avoid problems if 143153761Swollman# a particular place changes whether it observes DST. 144153761Swollman# We put these specifications here in the northamerica file both to 145153761Swollman# increase the chances that they'll actually get compiled and to 146153761Swollman# avoid the need to duplicate the US rules in another file. 147153761Swollman 148153761Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 149153761SwollmanZone EST -5:00 - EST 150153761SwollmanZone MST -7:00 - MST 151153761SwollmanZone HST -10:00 - HST 152153761SwollmanZone EST5EDT -5:00 US E%sT 153153761SwollmanZone CST6CDT -6:00 US C%sT 154153761SwollmanZone MST7MDT -7:00 US M%sT 155153761SwollmanZone PST8PDT -8:00 US P%sT 156153761Swollman 15719878Swollman# From Bob Devine (1988-01-28): 1582742Swollman# ...Alaska (and Hawaii) had the timezone names changed in 1967. 1592742Swollman# old new 1602742Swollman# Pacific Standard Time(PST) -same- 1612742Swollman# Yukon Standard Time(YST) -same- 1622742Swollman# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 1632742Swollman# Nome Standard Time (NT) Bering Standard Time (BST) 1642742Swollman# 1652742Swollman# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 1662742Swollman# The YST zone now covers nearly all of the state, AHST just part 1672742Swollman# of the Aleutian islands. No DST. 1682742Swollman 16914343Swollman# From Paul Eggert (1995-12-19): 170257682Sedwin# The tables below use 'NST', not 'NT', for Nome Standard Time. 171257682Sedwin# I invented 'CAWT' for Central Alaska War Time. 17214343Swollman 17319878Swollman# From U. S. Naval Observatory (1989-01-19): 1742742Swollman# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 1752742Swollman# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 1762742Swollman# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 1772742Swollman# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 1782742Swollman# USA MOUNTAIN 7 H BEHIND UTC DENVER 1792742Swollman# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 1802742Swollman# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 1812742Swollman# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 1822742Swollman# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 1832742Swollman# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 1842742Swollman# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 1852742Swollman# USA - " - 9 H BEHIND UTC APR 3 - OCT 30 1862742Swollman# USA HAWAII 10 H BEHIND UTC 1872742Swollman# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 1882742Swollman 18919878Swollman# From Arthur David Olson (1989-01-21): 1902742Swollman# The above dates are for 1988. 1912742Swollman# Note the "AKST" and "AKDT" abbreviations, the claim that there's 1922742Swollman# no DST in Samoa, and the claim that there is DST in Alaska and the 1932742Swollman# Aleutians. 1942742Swollman 19519878Swollman# From Arthur David Olson (1988-02-13): 1962742Swollman# Legal standard time zone names, from United States Code (1982 Edition and 1972742Swollman# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 19819878Swollman# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 1992742Swollman# took effect), as explained in sections 263 and 261: 2002742Swollman# (none) 2012742Swollman# United States standard eastern time 2022742Swollman# United States standard mountain time 2032742Swollman# United States standard central time 2042742Swollman# United States standard Pacific time 2052742Swollman# (none) 2062742Swollman# United States standard Alaska time 2072742Swollman# (none) 20819878Swollman# Next, names from 1967-04-01 until 1983-11-30 (the date for 2092742Swollman# public law 98-181): 2102742Swollman# Atlantic standard time 2112742Swollman# eastern standard time 2122742Swollman# central standard time 2132742Swollman# mountain standard time 2142742Swollman# Pacific standard time 2152742Swollman# Yukon standard time 2162742Swollman# Alaska-Hawaii standard time 2172742Swollman# Bering standard time 21819878Swollman# And after 1983-11-30: 2192742Swollman# Atlantic standard time 2202742Swollman# eastern standard time 2212742Swollman# central standard time 2222742Swollman# mountain standard time 2232742Swollman# Pacific standard time 2242742Swollman# Alaska standard time 2252742Swollman# Hawaii-Aleutian standard time 2262742Swollman# Samoa standard time 2272742Swollman# The law doesn't give abbreviations. 22814343Swollman# 22975267Swollman# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 23075267Swollman# Public law 106-564 (2000-12-23) introduced the abbreviation 23175267Swollman# "Chamorro Standard Time" for time in Guam and the Northern Marianas. 23275267Swollman# See the file "australasia". 233158421Swollman 234149514Swollman# From Arthur David Olson, 2005-08-09 235149514Swollman# The following was signed into law on 2005-08-08. 236149514Swollman# 237149514Swollman# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 238149514Swollman# (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15 239149514Swollman# U.S.C. 260a(a)) is amended-- 240257682Sedwin# (1) by striking 'first Sunday of April' and inserting 'second 241149514Swollman# Sunday of March'; and 242257682Sedwin# (2) by striking 'last Sunday of October' and inserting 'first 243149514Swollman# Sunday of November'. 244149514Swollman# (b) Effective Date- Subsection (a) shall take effect 1 year after the 245149514Swollman# date of enactment of this Act or March 1, 2007, whichever is later. 246149514Swollman# (c) Report to Congress- Not later than 9 months after the effective 247149514Swollman# date stated in subsection (b), the Secretary shall report to Congress 248149514Swollman# on the impact of this section on energy consumption in the United 249149514Swollman# States. 250149514Swollman# (d) Right to Revert- Congress retains the right to revert the 251149514Swollman# Daylight Saving Time back to the 2005 time schedules once the 252149514Swollman# Department study is complete. 2532742Swollman 25486222Swollman# US eastern time, represented by New York 25575267Swollman 25667578Swollman# Connecticut, Delaware, District of Columbia, most of Florida, 257149590Swollman# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 258149590Swollman# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 259114173Swollman# New Hampshire, New Jersey, New York, North Carolina, Ohio, 260114173Swollman# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 261114173Swollman# Vermont, Virginia, West Virginia 26267578Swollman 263149514Swollman# From Dave Cantor (2004-11-02): 264149514Swollman# Early this summer I had the occasion to visit the Mount Washington 265149514Swollman# Observatory weather station atop (of course!) Mount Washington [, NH].... 266149514Swollman# One of the staff members said that the station was on Eastern Standard Time 267149514Swollman# and didn't change their clocks for Daylight Saving ... so that their 268149514Swollman# reports will always have times which are 5 hours behind UTC. 269149514Swollman 270153670Swollman# From Paul Eggert (2005-08-26): 271153670Swollman# According to today's Huntsville Times 272153670Swollman# <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1> 273153670Swollman# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 274153670Swollman# in Russell County, Lanett in Chambers County and some towns in Lee County, 275153670Swollman# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 276153670Swollman# Roberts, city administrator in Phenix City. as saying "We are in the Central 277153670Swollman# time zone, but we do go by the Eastern time zone because so many people work 278158421Swollman# in Columbus." 279153670Swollman 28014343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 28114343SwollmanRule NYC 1920 only - Mar lastSun 2:00 1:00 D 28214343SwollmanRule NYC 1920 only - Oct lastSun 2:00 0 S 28314343SwollmanRule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 28414343SwollmanRule NYC 1921 1954 - Sep lastSun 2:00 0 S 28514343SwollmanRule NYC 1955 1966 - Oct lastSun 2:00 0 S 28614343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 287149514SwollmanZone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 28814343Swollman -5:00 US E%sT 1920 28914343Swollman -5:00 NYC E%sT 1942 29014343Swollman -5:00 US E%sT 1946 29114343Swollman -5:00 NYC E%sT 1967 29214343Swollman -5:00 US E%sT 2932742Swollman 29486222Swollman# US central time, represented by Chicago 29567578Swollman 296136638Swollman# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 297136638Swollman# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 298136638Swollman# Washington counties), Illinois, western Indiana 299114173Swollman# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 300114173Swollman# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 301114173Swollman# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 302114173Swollman# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 303114173Swollman# western Tennessee, most of Texas, Wisconsin 30467578Swollman 305158421Swollman# From Larry M. Smith (2006-04-26) re Wisconsin: 306158421Swollman# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 307158421Swollman# is currently enforced at the 01:00 time of change. Because the local 308158421Swollman# "bar time" in the state corresponds to 02:00, a number of citations 309158421Swollman# are issued for the "sale of class 'B' alcohol after prohibited 310158421Swollman# hours" within the deviated hour of this change every year.... 311169811Swollman# 312169811Swollman# From Douglas R. Bomberg (2007-03-12): 313169811Swollman# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 314169811Swollman# Statue 175 closer in synch with the US Congress' intent.... 315169811Swollman# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 316158421Swollman 31714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 31814343SwollmanRule Chicago 1920 only - Jun 13 2:00 1:00 D 31914343SwollmanRule Chicago 1920 1921 - Oct lastSun 2:00 0 S 32014343SwollmanRule Chicago 1921 only - Mar lastSun 2:00 1:00 D 32114343SwollmanRule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 32214343SwollmanRule Chicago 1922 1954 - Sep lastSun 2:00 0 S 32314343SwollmanRule Chicago 1955 1966 - Oct lastSun 2:00 0 S 32414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 325149514SwollmanZone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 32614343Swollman -6:00 US C%sT 1920 32714343Swollman -6:00 Chicago C%sT 1936 Mar 1 2:00 32814343Swollman -5:00 - EST 1936 Nov 15 2:00 32914343Swollman -6:00 Chicago C%sT 1942 33014343Swollman -6:00 US C%sT 1946 33114343Swollman -6:00 Chicago C%sT 1967 33214343Swollman -6:00 US C%sT 33386222Swollman# Oliver County, ND switched from mountain to central time on 1992-10-25. 334149514SwollmanZone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 33586222Swollman -7:00 US M%sT 1992 Oct 25 02:00 33686222Swollman -6:00 US C%sT 337158421Swollman# Morton County, ND, switched from mountain to central time on 338158421Swollman# 2003-10-26, except for the area around Mandan which was already central time. 339158421Swollman# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 340158421Swollman# Officially this switch also included part of Sioux County, and 341158421Swollman# Jones, Mellette, and Todd Counties in South Dakota; 342158421Swollman# but in practice these other counties were already observing central time. 343158421Swollman# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 344158421SwollmanZone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 345158421Swollman -7:00 US M%sT 2003 Oct 26 02:00 346158421Swollman -6:00 US C%sT 3472742Swollman 348219149Sedwin# From Josh Findley (2011-01-21): 349219149Sedwin# ...it appears that Mercer County, North Dakota, changed from the 350219149Sedwin# mountain time zone to the central time zone at the last transition from 351219149Sedwin# daylight-saving to standard time (on Nov. 7, 2010): 352219149Sedwin# <a href="http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm"> 353219149Sedwin# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 354219149Sedwin# </a> 355219149Sedwin# <a href="http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html"> 356219149Sedwin# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 357219149Sedwin# </a> 358219149Sedwin 359219149Sedwin# From Andy Lipscomb (2011-01-24): 360219149Sedwin# ...according to the Census Bureau, the largest city is Beulah (although 361219149Sedwin# it's commonly referred to as Beulah-Hazen, with Hazen being the next 362219149Sedwin# largest city in Mercer County). Google Maps places Beulah's city hall 363219149Sedwin# at 4715'51" north, 10146'40" west, which yields an offset of 6h47'07". 364219149Sedwin 365219149SedwinZone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 366219149Sedwin -7:00 US M%sT 2010 Nov 7 2:00 367219149Sedwin -6:00 US C%sT 368219149Sedwin 36986222Swollman# US mountain time, represented by Denver 37067578Swollman# 371136638Swollman# Colorado, far western Kansas, Montana, western 37286222Swollman# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 373171948Sedwin# New Mexico, southwestern North Dakota, 37475267Swollman# western South Dakota, far western Texas (El Paso County, Hudspeth County, 37575267Swollman# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 37667578Swollman# 37714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 37814343SwollmanRule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 37914343SwollmanRule Denver 1920 only - Oct lastSun 2:00 0 S 38014343SwollmanRule Denver 1921 only - May 22 2:00 0 S 38114343SwollmanRule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 38214343SwollmanRule Denver 1965 1966 - Oct lastSun 2:00 0 S 3832742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 384149514SwollmanZone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 38515309Swollman -7:00 US M%sT 1920 38615309Swollman -7:00 Denver M%sT 1942 38715309Swollman -7:00 US M%sT 1946 38815309Swollman -7:00 Denver M%sT 1967 38915309Swollman -7:00 US M%sT 3902742Swollman 39114343Swollman# US Pacific time, represented by Los Angeles 39267578Swollman# 393136638Swollman# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 394263042Sedwin# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 395263042Sedwin# north of the Salmon River, and the towns of Burgdorf and Warren), 396263042Sedwin# Nevada (except West Wendover), Oregon (except the northern 3/4 of 397263042Sedwin# Malheur county), and Washington 39867578Swollman# 39914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 40014343SwollmanRule CA 1948 only - Mar 14 2:00 1:00 D 40114343SwollmanRule CA 1949 only - Jan 1 2:00 0 S 40214343SwollmanRule CA 1950 1966 - Apr lastSun 2:00 1:00 D 40314343SwollmanRule CA 1950 1961 - Sep lastSun 2:00 0 S 40414343SwollmanRule CA 1962 1966 - Oct lastSun 2:00 0 S 40514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 406149514SwollmanZone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 40714343Swollman -8:00 US P%sT 1946 40814343Swollman -8:00 CA P%sT 1967 40914343Swollman -8:00 US P%sT 4108029Swollman 41114343Swollman# Alaska 41214343Swollman# AK%sT is the modern abbreviation for -9:00 per USNO. 41314343Swollman# 41486222Swollman# From Paul Eggert (2001-05-30): 41514343Swollman# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 41619878Swollman# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 41775267Swollman# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 41875267Swollman# also a Friday. Include only the time zone part of this transition, 41975267Swollman# ignoring the switch from Julian to Gregorian, since we can't represent 42075267Swollman# the Julian calendar. 42114343Swollman# 42286222Swollman# As far as we know, none of the exact locations mentioned below were 42386222Swollman# permanently inhabited in 1867 by anyone using either calendar. 42486222Swollman# (Yakutat was colonized by the Russians in 1799, but the settlement 42586222Swollman# was destroyed in 1805 by a Yakutat-kon war party.) However, there 42686222Swollman# were nearby inhabitants in some cases and for our purposes perhaps 42786222Swollman# it's best to simply use the official transition. 42886222Swollman# 429219411Sedwin 430219411Sedwin# From Steve Ferguson (2011-01-31): 431219411Sedwin# The author lives in Alaska and many of the references listed are only 432219411Sedwin# available to Alaskan residents. 433219411Sedwin# 434219411Sedwin# <a href="http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98"> 435219411Sedwin# http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98 436219411Sedwin# </a> 437219411Sedwin 438219411Sedwin# From Arthur David Olson (2011-02-01): 439219411Sedwin# Here's database-relevant material from the 2001 "Alaska History" article: 440219411Sedwin# 441219411Sedwin# On September 20 [1979]...DOT...officials decreed that on April 27, 442219411Sedwin# 1980, Juneau and other nearby communities would move to Yukon Time. 443219411Sedwin# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 444219411Sedwin# Pacific Time. 445219411Sedwin# 446219411Sedwin# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 447219411Sedwin# Department's September 1979 decision. Juneau and other communities in 448219411Sedwin# northern Southeast reverted to Pacific Time on October 26. 449219411Sedwin# 450219411Sedwin# On October 28 [1983]...the Metlakatla Indian Community Council voted 451219411Sedwin# unanimously to keep the reservation on Pacific Time. 452219411Sedwin# 453219411Sedwin# According to DOT official Joanne Petrie, Indian reservations are not 454219411Sedwin# bound to follow time zones imposed by neighboring jurisdictions. 455219411Sedwin# 456219411Sedwin# (The last is consistent with how the database now handles the Navajo 457219411Sedwin# Nation.) 458219411Sedwin 459219411Sedwin# From Arthur David Olson (2011-02-09): 460219411Sedwin# I just spoke by phone with a staff member at the Metlakatla Indian 461219411Sedwin# Community office (using contact information available at 462219411Sedwin# <a href="http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla"> 463219411Sedwin# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 464219411Sedwin# </a>). 465219411Sedwin# It's shortly after 1:00 here on the east coast of the United States; 466219411Sedwin# the staffer said it was shortly after 10:00 there. When I asked whether 467219411Sedwin# that meant they were on Pacific time, they said no--they were on their 468219411Sedwin# own time. I asked about daylight saving; they said it wasn't used. I 469219411Sedwin# did not inquire about practices in the past. 470219411Sedwin 471226298Sedwin# From Arthur David Olson (2011-08-17): 472226298Sedwin# For lack of better information, assume that Metlakatla's 473226298Sedwin# abandonment of use of daylight saving resulted from the 1983 vote. 474226298Sedwin 47514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 47675267SwollmanZone America/Juneau 15:02:19 - LMT 1867 Oct 18 47775267Swollman -8:57:41 - LMT 1900 Aug 20 12:00 47814343Swollman -8:00 - PST 1942 47914343Swollman -8:00 US P%sT 1946 48014343Swollman -8:00 - PST 1969 481219411Sedwin -8:00 US P%sT 1980 Apr 27 2:00 482240461Sedwin -9:00 US Y%sT 1980 Oct 26 2:00 48314343Swollman -8:00 US P%sT 1983 Oct 30 2:00 484136638Swollman -9:00 US Y%sT 1983 Nov 30 48514343Swollman -9:00 US AK%sT 486226298SedwinZone America/Sitka 14:58:47 - LMT 1867 Oct 18 487219411Sedwin -9:01:13 - LMT 1900 Aug 20 12:00 488219411Sedwin -8:00 - PST 1942 489219411Sedwin -8:00 US P%sT 1946 490219411Sedwin -8:00 - PST 1969 491219411Sedwin -8:00 US P%sT 1983 Oct 30 2:00 492219411Sedwin -9:00 US Y%sT 1983 Nov 30 493219411Sedwin -9:00 US AK%sT 494219411SedwinZone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 495219411Sedwin -8:46:18 - LMT 1900 Aug 20 12:00 496219411Sedwin -8:00 - PST 1942 497219411Sedwin -8:00 US P%sT 1946 498219411Sedwin -8:00 - PST 1969 499219411Sedwin -8:00 US P%sT 1983 Oct 30 2:00 500226298Sedwin -8:00 - MeST 50175267SwollmanZone America/Yakutat 14:41:05 - LMT 1867 Oct 18 50275267Swollman -9:18:55 - LMT 1900 Aug 20 12:00 50314343Swollman -9:00 - YST 1942 50414343Swollman -9:00 US Y%sT 1946 50514343Swollman -9:00 - YST 1969 506136638Swollman -9:00 US Y%sT 1983 Nov 30 50714343Swollman -9:00 US AK%sT 50875267SwollmanZone America/Anchorage 14:00:24 - LMT 1867 Oct 18 50975267Swollman -9:59:36 - LMT 1900 Aug 20 12:00 51014343Swollman -10:00 - CAT 1942 511158421Swollman -10:00 US CAT/CAWT 1945 Aug 14 23:00u 512158421Swollman -10:00 US CAT/CAPT 1946 # Peace 51314343Swollman -10:00 - CAT 1967 Apr 51414343Swollman -10:00 - AHST 1969 51514343Swollman -10:00 US AH%sT 1983 Oct 30 2:00 516136638Swollman -9:00 US Y%sT 1983 Nov 30 51714343Swollman -9:00 US AK%sT 51875267SwollmanZone America/Nome 12:58:21 - LMT 1867 Oct 18 51975267Swollman -11:01:38 - LMT 1900 Aug 20 12:00 52014343Swollman -11:00 - NST 1942 52114343Swollman -11:00 US N%sT 1946 52214343Swollman -11:00 - NST 1967 Apr 52314343Swollman -11:00 - BST 1969 52414343Swollman -11:00 US B%sT 1983 Oct 30 2:00 525136638Swollman -9:00 US Y%sT 1983 Nov 30 52614343Swollman -9:00 US AK%sT 52775267SwollmanZone America/Adak 12:13:21 - LMT 1867 Oct 18 52875267Swollman -11:46:38 - LMT 1900 Aug 20 12:00 52914343Swollman -11:00 - NST 1942 53014343Swollman -11:00 US N%sT 1946 53114343Swollman -11:00 - NST 1967 Apr 53214343Swollman -11:00 - BST 1969 53314343Swollman -11:00 US B%sT 1983 Oct 30 2:00 534136638Swollman -10:00 US AH%sT 1983 Nov 30 53514343Swollman -10:00 US HA%sT 536149514Swollman# The following switches don't quite make our 1970 cutoff. 537149514Swollman# 53814343Swollman# Shanks writes that part of southwest Alaska (e.g. Aniak) 53914343Swollman# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 54014343Swollman# and another part (e.g. Akiak) made the same switch five weeks later. 541149514Swollman# 542149514Swollman# From David Flater (2004-11-09): 543149514Swollman# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 544149514Swollman# Historic Preservation Commission, provided this information, which 545149514Swollman# suggests that Unalaska deviated from statutory time from early 1967 546149514Swollman# possibly until 1983: 547149514Swollman# 548149514Swollman# Minutes of the Unalaska City Council Meeting, January 10, 1967: 549149514Swollman# "Except for St. Paul and Akutan, Unalaska is the only important 550149514Swollman# location not on Alaska Standard Time. The following resolution was 551149514Swollman# made by William Robinson and seconded by Henry Swanson: Be it 552149514Swollman# resolved that the City of Unalaska hereby goes to Alaska Standard 553149514Swollman# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 554149514Swollman# January 14, Alaska Standard Time.) This resolution was passed with 555149514Swollman# three votes for and one against." 5562742Swollman 55714343Swollman# Hawaii 558218122Sedwin 559218122Sedwin# From Arthur David Olson (2010-12-09): 560218122Sedwin# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 561218122Sedwin# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 562218122Sedwin# the article is available at 563218122Sedwin# <a href="http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf"> 564218122Sedwin# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 565218122Sedwin# </a> 566218122Sedwin# and indicates that standard time was adopted effective noon, January 567218122Sedwin# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 568218122Sedwin# saving for the period between the last Sunday of each April and the 569218122Sedwin# last Sunday of each September, but less than a month later repealed the 570218122Sedwin# act," (page 220), that year-round daylight saving time was in effect 571218122Sedwin# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 572218122Sedwin# when clocks changed) and that clocks were changed by 30 minutes 573218122Sedwin# effective the second Sunday of June, 1947 (page 219, with no time of 574218122Sedwin# day given for when clocks changed). A footnote for the 1933 changes 575218122Sedwin# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 576218122Sedwin# and Act 163 (approved 21 May 1933)." 577218122Sedwin 578218122Sedwin# From Arthur David Olson (2011-01-19): 579218122Sedwin# The following is from "Laws of the Territory of Hawaii Passed by the 580218122Sedwin# Seventeenth Legislature: Regular Session 1933," available (as of 581218122Sedwin# 2011-01-19) at American University's Pence Law Library. Page 85: "Act 582218122Sedwin# 90...At 2 o'clock ante meridian of the last Sunday in April of each 583218122Sedwin# year, the standard time of this Territory shall be advanced one 584218122Sedwin# hour...This Act shall take effect upon its approval. Approved this 26th 585218122Sedwin# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 586218122Sedwin# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 587218122Sedwin# hereby repealed...This Act shall take effect upon its approval, upon 588218122Sedwin# which date the standard time of this Territory shall be restored to 589218122Sedwin# that existing immediately prior to the taking effect of said Act 90. 590218122Sedwin# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 591218122Sedwin# of the Territory of Hawaii." 59214343Swollman# 593218122Sedwin# Note that 1933-05-21 was a Sunday. 594218122Sedwin# We're left to guess the time of day when Act 163 was approved; guess noon. 595218122Sedwin 596218122SedwinZone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox 597218122Sedwin -10:30 - HST 1933 Apr 30 2:00 #Laws 1933 598218122Sedwin -10:30 1:00 HDT 1933 May 21 12:00 #Laws 1933+12 599218122Sedwin -10:30 - HST 1942 Feb 09 2:00 #Schmitt&Cox+2 600226298Sedwin -10:30 1:00 HDT 1945 Sep 30 2:00 #Schmitt&Cox+2 601226298Sedwin -10:30 - HST 1947 Jun 8 2:00 #Schmitt&Cox+2 60214343Swollman -10:00 - HST 6032742Swollman 604257682SedwinLink Pacific/Honolulu Pacific/Johnston 605257682Sedwin 60614343Swollman# Now we turn to US areas that have diverged from the consensus since 1970. 60714343Swollman 60814343Swollman# Arizona mostly uses MST. 609114173Swollman 610114173Swollman# From Paul Eggert (2002-10-20): 611114173Swollman# 612114173Swollman# The information in the rest of this paragraph is derived from the 613114173Swollman# <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> 614114173Swollman# Daylight Saving Time web page (2002-01-23)</a> maintained by the 615114173Swollman# Arizona State Library, Archives and Public Records. 616114173Swollman# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 617114173Swollman# time, but by federal law railroads, airlines, bus lines, military 618114173Swollman# personnel, and some engaged in interstate commerce continued to 619114173Swollman# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 620114173Swollman# Gazette says that was the date the law changed, and that 04-01 was 621114173Swollman# the date the state's clocks would change. In 1945 the State of 622114173Swollman# Arizona used standard time all year, again with exceptions only as 623114173Swollman# mandated by federal law. Arizona observed DST in 1967, but Arizona 624114173Swollman# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 625114173Swollman# 626114173Swollman# Shanks says the 1944 experiment came to an end on 1944-03-17. 627114173Swollman# Go with the Arizona State Library instead. 628114173Swollman 629149514SwollmanZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 63014343Swollman -7:00 US M%sT 1944 Jan 1 00:01 631114173Swollman -7:00 - MST 1944 Apr 1 00:01 63214343Swollman -7:00 US M%sT 1944 Oct 1 00:01 63314343Swollman -7:00 - MST 1967 634114173Swollman -7:00 US M%sT 1968 Mar 21 63514343Swollman -7:00 - MST 63619878Swollman# From Arthur David Olson (1988-02-13): 63714343Swollman# A writer from the Inter Tribal Council of Arizona, Inc., 638136638Swollman# notes in private correspondence dated 1987-12-28 that "Presently, only the 6392742Swollman# Navajo Nation participates in the Daylight Saving Time policy, due to its 6402742Swollman# large size and location in three states." (The "only" means that other 6412742Swollman# tribal nations don't use DST.) 642257682Sedwin# 643257682Sedwin# From Paul Eggert (2013-08-26): 644257682Sedwin# See America/Denver for a zone appropriate for the Navajo Nation. 6452742Swollman 646136638Swollman# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 647136638Swollman# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 648136638Swollman# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 649136638Swollman# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 650171948Sedwin# Teton, Twin Falls, Valley, Washington counties, and the southern 651171948Sedwin# quarter of Idaho county) and eastern Oregon (most of Malheur County) 652136638Swollman# switched four weeks late in 1974. 653149514Swollman# 65414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 655149514SwollmanZone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 65614343Swollman -8:00 US P%sT 1923 May 13 2:00 65714343Swollman -7:00 US M%sT 1974 65814343Swollman -7:00 - MST 1974 Feb 3 2:00 65914343Swollman -7:00 US M%sT 6602742Swollman 66114343Swollman# Indiana 66214343Swollman# 66358787Sru# For a map of Indiana's time zone regions, see: 66458787Sru# <a href="http://www.mccsc.edu/time.html"> 66558787Sru# What time is it in Indiana? 666158421Swollman# </a> (2006-03-01) 66758787Sru# 668171948Sedwin# From Paul Eggert (2007-08-17): 669149590Swollman# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 670149590Swollman# with the following exceptions: 671149590Swollman# 672149590Swollman# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 673149590Swollman# Vandenburgh, and Warrick counties have been like America/Chicago. 674149590Swollman# 675149590Swollman# - Dearborn and Ohio counties have been like America/New_York. 676149590Swollman# 677149590Swollman# - Clark, Floyd, and Harrison counties have been like 678149590Swollman# America/Kentucky/Louisville. 679149590Swollman# 680171948Sedwin# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 681171948Sedwin# and Switzerland counties have their own time zone histories as noted below. 682158421Swollman# 683158421Swollman# Shanks partitioned Indiana into 345 regions, each with its own time history, 684257682Sedwin# and wrote "Even newspaper reports present contradictory information." 685158421Swollman# Those Hoosiers! Such a flighty and changeable people! 68614343Swollman# Fortunately, most of the complexity occurred before our cutoff date of 1970. 68714343Swollman# 68814343Swollman# Other than Indianapolis, the Indiana place names are so nondescript 689257682Sedwin# that they would be ambiguous if we left them at the 'America' level. 690257682Sedwin# So we reluctantly put them all in a subdirectory 'America/Indiana'. 69175267Swollman 692149514Swollman# From Paul Eggert (2005-08-16): 693158421Swollman# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. 69475267Swollman 695158421Swollman# From Nathan Stratton Treadway (2006-03-30): 696158421Swollman# http://www.dot.gov/affairs/dot0406.htm [3705 B] 697158421Swollman# From Deborah Goldsmith (2006-01-18): 698158421Swollman# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB] 699158421Swollman# From Paul Eggert (2006-01-20): 700158421Swollman# It says "DOT is relocating the time zone boundary in Indiana to move Starke, 701158421Swollman# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 702158421Swollman# Eastern Time Zone to the Central Time Zone.... The effective date of 703158421Swollman# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the 704158421Swollman# changeover date from standard time to Daylight Saving Time." 705158421Swollman# Strictly speaking, this means the affected counties will change their 706158421Swollman# clocks twice that night, but this obviously is in error. The intent 707158421Swollman# is that 01:59:59 EST be followed by 02:00:00 CDT. 708158421Swollman 709169811Swollman# From Gwillim Law (2007-02-10): 710169811Swollman# The Associated Press has been reporting that Pulaski County, Indiana is 711169811Swollman# going to switch from Central to Eastern Time on March 11, 2007.... 712169811Swollman# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 713169811Swollman 71414343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 71514343SwollmanRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 71614343SwollmanRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 71714343SwollmanRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 71814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 719149514SwollmanZone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 72014343Swollman -6:00 US C%sT 1920 72114343Swollman -6:00 Indianapolis C%sT 1942 72214343Swollman -6:00 US C%sT 1946 72314343Swollman -6:00 Indianapolis C%sT 1955 Apr 24 2:00 72414343Swollman -5:00 - EST 1957 Sep 29 2:00 72514343Swollman -6:00 - CST 1958 Apr 27 2:00 72614343Swollman -5:00 - EST 1969 72714343Swollman -5:00 US E%sT 1971 728149514Swollman -5:00 - EST 2006 729149514Swollman -5:00 US E%sT 7302742Swollman# 731158421Swollman# Eastern Crawford County, Indiana, left its clocks alone in 1974, 732158421Swollman# as well as from 1976 through 2005. 73314343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 73414343SwollmanRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 73514343SwollmanRule Marengo 1951 only - Sep lastSun 2:00 0 S 73614343SwollmanRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 73714343SwollmanRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 73814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 739149514SwollmanZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 74014343Swollman -6:00 US C%sT 1951 74114343Swollman -6:00 Marengo C%sT 1961 Apr 30 2:00 74214343Swollman -5:00 - EST 1969 74314343Swollman -5:00 US E%sT 1974 Jan 6 2:00 74414343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 74514343Swollman -5:00 US E%sT 1976 746149514Swollman -5:00 - EST 2006 747149514Swollman -5:00 US E%sT 74814343Swollman# 749171948Sedwin# Daviess, Dubois, Knox, and Martin Counties, Indiana, 750171948Sedwin# switched from eastern to central time in April 2006, then switched back 751171948Sedwin# in November 2007. 752158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 753158421SwollmanRule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 754158421SwollmanRule Vincennes 1946 only - Sep lastSun 2:00 0 S 755158421SwollmanRule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 756158421SwollmanRule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 757158421SwollmanRule Vincennes 1955 only - May 1 0:00 1:00 D 758158421SwollmanRule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 759158421SwollmanRule Vincennes 1960 only - Oct lastSun 2:00 0 S 760158421SwollmanRule Vincennes 1961 only - Sep lastSun 2:00 0 S 761158421SwollmanRule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 762158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 763158421SwollmanZone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 764158421Swollman -6:00 US C%sT 1946 765158421Swollman -6:00 Vincennes C%sT 1964 Apr 26 2:00 766158421Swollman -5:00 - EST 1969 767158421Swollman -5:00 US E%sT 1971 768158421Swollman -5:00 - EST 2006 Apr 2 2:00 769171948Sedwin -6:00 US C%sT 2007 Nov 4 2:00 770171948Sedwin -5:00 US E%sT 771171948Sedwin# 772171948Sedwin# Perry County, Indiana, switched from eastern to central time in April 2006. 773171948Sedwin# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 774171948SedwinRule Perry 1946 only - Apr lastSun 2:00 1:00 D 775171948SedwinRule Perry 1946 only - Sep lastSun 2:00 0 S 776171948SedwinRule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 777171948SedwinRule Perry 1953 1959 - Sep lastSun 2:00 0 S 778171948SedwinRule Perry 1955 only - May 1 0:00 1:00 D 779171948SedwinRule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 780171948SedwinRule Perry 1960 only - Oct lastSun 2:00 0 S 781171948SedwinRule Perry 1961 only - Sep lastSun 2:00 0 S 782171948SedwinRule Perry 1962 1963 - Oct lastSun 2:00 0 S 783171948Sedwin# Zone NAME GMTOFF RULES FORMAT [UNTIL] 784171948SedwinZone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 785171948Sedwin -6:00 US C%sT 1946 786171948Sedwin -6:00 Perry C%sT 1964 Apr 26 2:00 787171948Sedwin -5:00 - EST 1969 788171948Sedwin -5:00 US E%sT 1971 789171948Sedwin -5:00 - EST 2006 Apr 2 2:00 790158421Swollman -6:00 US C%sT 791158421Swollman# 792158421Swollman# Pike County, Indiana moved from central to eastern time in 1977, 793171948Sedwin# then switched back in 2006, then switched back again in 2007. 794158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 795158421SwollmanRule Pike 1955 only - May 1 0:00 1:00 D 796158421SwollmanRule Pike 1955 1960 - Sep lastSun 2:00 0 S 797158421SwollmanRule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 798158421SwollmanRule Pike 1961 1964 - Oct lastSun 2:00 0 S 799158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 800158421SwollmanZone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 801158421Swollman -6:00 US C%sT 1955 802158421Swollman -6:00 Pike C%sT 1965 Apr 25 2:00 803158421Swollman -5:00 - EST 1966 Oct 30 2:00 804158421Swollman -6:00 US C%sT 1977 Oct 30 2:00 805158421Swollman -5:00 - EST 2006 Apr 2 2:00 806171948Sedwin -6:00 US C%sT 2007 Nov 4 2:00 807171948Sedwin -5:00 US E%sT 808158421Swollman# 809158421Swollman# Starke County, Indiana moved from central to eastern time in 1991, 810158421Swollman# then switched back in 2006. 81119878Swollman# From Arthur David Olson (1991-10-28): 81219878Swollman# An article on page A3 of the Sunday, 1991-10-27 Washington Post 81314343Swollman# notes that Starke County switched from Central time to Eastern time as of 81419878Swollman# 1991-10-27. 81514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 81614343SwollmanRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 81714343SwollmanRule Starke 1947 1954 - Sep lastSun 2:00 0 S 81814343SwollmanRule Starke 1955 1956 - Oct lastSun 2:00 0 S 81914343SwollmanRule Starke 1957 1958 - Sep lastSun 2:00 0 S 82014343SwollmanRule Starke 1959 1961 - Oct lastSun 2:00 0 S 82114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 822149514SwollmanZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 82314343Swollman -6:00 US C%sT 1947 82414343Swollman -6:00 Starke C%sT 1962 Apr 29 2:00 82514343Swollman -5:00 - EST 1963 Oct 27 2:00 82614343Swollman -6:00 US C%sT 1991 Oct 27 2:00 827158421Swollman -5:00 - EST 2006 Apr 2 2:00 828158421Swollman -6:00 US C%sT 82914343Swollman# 830169811Swollman# Pulaski County, Indiana, switched from eastern to central time in 831169811Swollman# April 2006 and then switched back in March 2007. 832169811Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 833169811SwollmanRule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 834169811SwollmanRule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 835169811SwollmanRule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 836169811SwollmanRule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 837169811Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 838169811SwollmanZone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 839169811Swollman -6:00 US C%sT 1946 840169811Swollman -6:00 Pulaski C%sT 1961 Apr 30 2:00 841169811Swollman -5:00 - EST 1969 842169811Swollman -5:00 US E%sT 1971 843169811Swollman -5:00 - EST 2006 Apr 2 2:00 844169811Swollman -6:00 US C%sT 2007 Mar 11 2:00 845169811Swollman -5:00 US E%sT 846169811Swollman# 847158421Swollman# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 84814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 849149514SwollmanZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 85014343Swollman -6:00 US C%sT 1954 Apr 25 2:00 85114343Swollman -5:00 - EST 1969 85214343Swollman -5:00 US E%sT 1973 853149514Swollman -5:00 - EST 2006 854149514Swollman -5:00 US E%sT 8552742Swollman 85614343Swollman# Part of Kentucky left its clocks alone in 1974. 857149590Swollman# This also includes Clark, Floyd, and Harrison counties in Indiana. 85814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 85914343SwollmanRule Louisville 1921 only - May 1 2:00 1:00 D 86014343SwollmanRule Louisville 1921 only - Sep 1 2:00 0 S 86114343SwollmanRule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 86214343SwollmanRule Louisville 1941 only - Sep lastSun 2:00 0 S 86314343SwollmanRule Louisville 1946 only - Jun 2 2:00 0 S 86414343SwollmanRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 86514343SwollmanRule Louisville 1956 1960 - Oct lastSun 2:00 0 S 86614343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 867149514SwollmanZone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 86814343Swollman -6:00 US C%sT 1921 86914343Swollman -6:00 Louisville C%sT 1942 87014343Swollman -6:00 US C%sT 1946 87114343Swollman -6:00 Louisville C%sT 1961 Jul 23 2:00 87214343Swollman -5:00 - EST 1968 87314343Swollman -5:00 US E%sT 1974 Jan 6 2:00 87414343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 87514343Swollman -5:00 US E%sT 87667578Swollman# 877158421Swollman# Wayne County, Kentucky 87858787Sru# 87958787Sru# From 88058787Sru# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 88158787Sru# Lake Cumberland LIFE 88258787Sru# </a> (1999-01-29) via WKYM-101.7: 88358787Sru# Clinton County has joined Wayne County in asking the DoT to change from 88458787Sru# the Central to the Eastern time zone.... The Wayne County government made 88558787Sru# the same request in December. And while Russell County officials have not 88658787Sru# taken action, the majority of respondents to a poll conducted there in 88758787Sru# August indicated they would like to change to "fast time" also. 88858787Sru# The three Lake Cumberland counties are the farthest east of any U.S. 88958787Sru# location in the Central time zone. 89067578Swollman# 89167578Swollman# From Rich Wales (2000-08-29): 89267578Swollman# After prolonged debate, and despite continuing deep differences of opinion, 89367578Swollman# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 89475267Swollman# (-0500) time. They won't "fall back" this year. See Sara Shipley, 89575267Swollman# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 89686222Swollman# 89786222Swollman# From Paul Eggert (2001-07-16): 89886222Swollman# The final rule was published in the 89986222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> 90086222Swollman# Federal Register 65, 160 (2000-08-17), page 50154-50158. 90186222Swollman# </a> 902114173Swollman# 903149514SwollmanZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 90467578Swollman -6:00 US C%sT 1946 90567578Swollman -6:00 - CST 1968 90667578Swollman -6:00 US C%sT 2000 Oct 29 2:00 90767578Swollman -5:00 US E%sT 9082742Swollman 90967578Swollman 91067578Swollman# From Rives McDow (2000-08-30): 91167578Swollman# Here ... are all the changes in the US since 1985. 91267578Swollman# Kearny County, KS (put all of county on central; 91367578Swollman# previously split between MST and CST) ... 1990-10 91467578Swollman# Starke County, IN (from CST to EST) ... 1991-10 91567578Swollman# Oliver County, ND (from MST to CST) ... 1992-10 91667578Swollman# West Wendover, NV (from PST TO MST) ... 1999-10 91767578Swollman# Wayne County, KY (from CST to EST) ... 2000-10 91867578Swollman# 91986222Swollman# From Paul Eggert (2001-07-17): 92086222Swollman# We don't know where the line used to be within Kearny County, KS, 92186222Swollman# so omit that change for now. 92286222Swollman# See America/Indiana/Knox for the Starke County, IN change. 92386222Swollman# See America/North_Dakota/Center for the Oliver County, ND change. 92486222Swollman# West Wendover, NV officially switched from Pacific to mountain time on 92586222Swollman# 1999-10-31. See the 92686222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> 92786222Swollman# Federal Register 64, 203 (1999-10-21), page 56705-56707. 92886222Swollman# </a> 92986222Swollman# However, the Federal Register says that West Wendover already operated 93086222Swollman# on mountain time, and the rule merely made this official; 93186222Swollman# hence a separate tz entry is not needed. 93267578Swollman 93314343Swollman# Michigan 93414343Swollman# 93519878Swollman# From Bob Devine (1988-01-28): 93614343Swollman# Michigan didn't observe DST from 1968 to 1973. 93714343Swollman# 93858787Sru# From Paul Eggert (1999-03-31): 93958787Sru# Shanks writes that Michigan started using standard time on 1885-09-18, 94058787Sru# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 94158787Sru# that Detroit kept 94214343Swollman# 94314343Swollman# local time until 1900 when the City Council decreed that clocks should 94414343Swollman# be put back twenty-eight minutes to Central Standard Time. Half the 94514343Swollman# city obeyed, half refused. After considerable debate, the decision 94614343Swollman# was rescinded and the city reverted to Sun time. A derisive offer to 94714343Swollman# erect a sundial in front of the city hall was referred to the 94814343Swollman# Committee on Sewers. Then, in 1905, Central time was adopted 94914343Swollman# by city vote. 95014343Swollman# 95114343Swollman# This story is too entertaining to be false, so go with Howse over Shanks. 95214343Swollman# 95375267Swollman# From Paul Eggert (2001-03-06): 954257682Sedwin# Garland (1927) writes "Cleveland and Detroit advanced their clocks 955257682Sedwin# one hour in 1914." This change is not in Shanks. We have no more 95675267Swollman# info, so omit this for now. 95775267Swollman# 95814343Swollman# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 95914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 96014343SwollmanRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 96114343SwollmanRule Detroit 1948 only - Sep lastSun 2:00 0 S 96214343SwollmanRule Detroit 1967 only - Jun 14 2:00 1:00 D 96314343SwollmanRule Detroit 1967 only - Oct lastSun 2:00 0 S 96414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 96514343SwollmanZone America/Detroit -5:32:11 - LMT 1905 96614343Swollman -6:00 - CST 1915 May 15 2:00 96714343Swollman -5:00 - EST 1942 96814343Swollman -5:00 US E%sT 1946 96914343Swollman -5:00 Detroit E%sT 1973 97014343Swollman -5:00 US E%sT 1975 97114343Swollman -5:00 - EST 1975 Apr 27 2:00 97214343Swollman -5:00 US E%sT 97314343Swollman# 974158421Swollman# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 975158421Swollman# switched from EST to CST/CDT in 1973. 97614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 97714343SwollmanRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 97814343SwollmanRule Menominee 1946 only - Sep lastSun 2:00 0 S 97914343SwollmanRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 98014343SwollmanRule Menominee 1966 only - Oct lastSun 2:00 0 S 98114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 98214343SwollmanZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 98314343Swollman -6:00 US C%sT 1946 98414343Swollman -6:00 Menominee C%sT 1969 Apr 27 2:00 98514343Swollman -5:00 - EST 1973 Apr 29 2:00 98614343Swollman -6:00 US C%sT 98714343Swollman 9882742Swollman# Navassa 98986222Swollman# administered by the US Fish and Wildlife Service 99043543Swollman# claimed by US under the provisions of the 1856 Guano Islands Act 99143543Swollman# also claimed by Haiti 99243543Swollman# occupied 1857/1900 by the Navassa Phosphate Co 99386222Swollman# US lighthouse 1917/1996-09 99443543Swollman# currently uninhabited 995257682Sedwin# see Mark Fineman, "An Isle Rich in Guano and Discord", 99643543Swollman# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 99743543Swollman# Jimmy Skaggs, _The Great Guano Rush_ (1994). 99814343Swollman 9992742Swollman################################################################################ 10002742Swollman 10012742Swollman 1002158421Swollman# From Paul Eggert (2006-03-22): 1003158421Swollman# A good source for time zone historical data outside the U.S. is 1004158421Swollman# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1005158421Swollman# San Diego: ACS Publications, Inc. (2003). 10062742Swollman# 100786222Swollman# Gwillim Law writes that a good source 100820094Swollman# for recent time zone data is the International Air Transport 100920094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 101020094Swollman# published semiannually. Law sent in several helpful summaries 101120094Swollman# of the IATA's data after 1990. 101220094Swollman# 1013158421Swollman# Except where otherwise noted, Shanks & Pottenger is the source for 1014158421Swollman# entries through 1990, and IATA SSIM is the source for entries afterwards. 101520094Swollman# 1016121098Swollman# Other sources occasionally used include: 10172742Swollman# 1018121098Swollman# Edward W. Whitman, World Time Differences, 1019121098Swollman# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1020121098Swollman# which I found in the UCLA library. 1021121098Swollman# 1022121098Swollman# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> 1023121098Swollman# William Willett, The Waste of Daylight, 19th edition 1024121098Swollman# </a> (1914-03) 1025121098Swollman# 1026248310Sedwin# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1027248310Sedwin# <http://www.jstor.org/stable/1774359>. 1028248310Sedwin# 1029257682Sedwin# See the 'europe' file for Greenland. 10302742Swollman 10312742Swollman# Canada 10322742Swollman 1033149514Swollman# From Alain LaBont<e'> (1994-11-14): 10349908Swollman# I post here the time zone abbreviations standardized in Canada 10359908Swollman# for both English and French in the CAN/CSA-Z234.4-89 standard.... 10369908Swollman# 10379908Swollman# UTC Standard time Daylight savings time 10389908Swollman# offset French English French English 10399908Swollman# -2:30 - - HAT NDT 10409908Swollman# -3 - - HAA ADT 10419908Swollman# -3:30 HNT NST - - 10429908Swollman# -4 HNA AST HAE EDT 10439908Swollman# -5 HNE EST HAC CDT 10449908Swollman# -6 HNC CST HAR MDT 10459908Swollman# -7 HNR MST HAP PDT 10469908Swollman# -8 HNP PST HAY YDT 10479908Swollman# -9 HNY YST - - 10489908Swollman# 10499908Swollman# HN: Heure Normale ST: Standard Time 10509908Swollman# HA: Heure Avanc<e'>e DT: Daylight saving Time 10519908Swollman# 10529908Swollman# A: de l'Atlantique Atlantic 10539908Swollman# C: du Centre Central 10549908Swollman# E: de l'Est Eastern 10559908Swollman# M: Mountain 10569908Swollman# N: Newfoundland 10579908Swollman# P: du Pacifique Pacific 10589908Swollman# R: des Rocheuses 10599908Swollman# T: de Terre-Neuve 10609908Swollman# Y: du Yukon Yukon 10619908Swollman# 1062149514Swollman# From Paul Eggert (1994-11-22): 10639908Swollman# Alas, this sort of thing must be handled by localization software. 10642742Swollman 1065158421Swollman# Unless otherwise specified, the data for Canada are all from Shanks 1066158421Swollman# & Pottenger. 10679908Swollman 1068169811Swollman# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1069169811Swollman# 2007-03-01): 1070158421Swollman# The British Columbia government announced yesterday that it will 1071158421Swollman# adjust daylight savings next year to align with changes in the 1072158421Swollman# U.S. and the rest of Canada.... 1073158421Swollman# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1074169811Swollman# ... 1075169811Swollman# Nova Scotia 1076163302Sru# Daylight saving time will be extended by four weeks starting in 2007.... 1077169811Swollman# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1078169811Swollman# 1079163302Sru# [For New Brunswick] the new legislation dictates that the time change is to 1080163302Sru# be done at 02:00 instead of 00:01. 1081163302Sru# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1082163302Sru# ... 1083163302Sru# Manitoba has traditionally changed the clock every fall at 03:00. 1084163302Sru# As of 2006, the transition is to take place one hour earlier at 02:00. 1085163302Sru# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1086163302Sru# ... 1087163302Sru# [Alberta, Ontario, Quebec] will follow US rules. 1088169811Swollman# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1089163302Sru# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1090169811Swollman# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1091163302Sru# ... 1092169811Swollman# P.E.I. will follow US rules.... 1093169811Swollman# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1094163302Sru# ... 1095169811Swollman# Province of Newfoundland and Labrador.... 1096169811Swollman# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1097163302Sru# ... 1098169811Swollman# Yukon 1099169811Swollman# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1100169811Swollman# ... 1101163302Sru# N.W.T. will follow US rules. Whoever maintains the government web site 1102163302Sru# does not seem to believe in bookmarks. To see the news release, click the 1103163302Sru# following link and search for "Daylight Savings Time Change". Press the 1104163302Sru# "Daylight Savings Time Change" link; it will fire off a popup using 1105163302Sru# JavaScript. 1106163302Sru# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1107169811Swollman# ... 1108169811Swollman# Nunavut 1109169811Swollman# An amendment to the Interpretation Act was registered on February 19/2007.... 1110169811Swollman# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1111163302Sru 1112158421Swollman# From Paul Eggert (2006-04-25): 111367578Swollman# H. David Matthews and Mary Vincent's map 1114153761Swollman# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp"> 111567578Swollman# "It's about TIME", _Canadian Geographic_ (September-October 1998) 111667578Swollman# </a> contains detailed boundaries for regions observing nonstandard 111767578Swollman# time and daylight saving time arrangements in Canada circa 1998. 111867578Swollman# 1119153761Swollman# INMS, the Institute for National Measurement Standards in Ottawa, has <a 1120153761Swollman# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php"> 112167578Swollman# information about standard and daylight saving time zones in Canada. 112267578Swollman# </a> (updated periodically). 112367578Swollman# Its unofficial information is often taken from Matthews and Vincent. 11249908Swollman 1125163302Sru# From Paul Eggert (2006-06-27): 1126163302Sru# For now, assume all of DST-observing Canada will fall into line with the 1127163302Sru# new US DST rules, 1128163302Sru 1129233447Sedwin# From Chris Walton (2011-12-01) 1130233447Sedwin# In the first of Tammy Hardwick's articles 1131233447Sedwin# <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260"> 1132233447Sedwin# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1133233447Sedwin# </a> 1134233447Sedwin# she quotes the Friday November 1/1918 edition of the Creston Review. 1135233447Sedwin# The quote includes these two statements: 1136233447Sedwin# 'Sunday the CPR went back to the old system of time...' 1137233447Sedwin# '... The daylight saving scheme was dropped all over Canada at the same time,' 1138233447Sedwin# These statements refer to a transition from daylight time to standard time 1139233447Sedwin# that occurred nationally on Sunday October 27/1918. This transition was 1140233447Sedwin# also documented in the Saturday October 26/1918 edition of the Toronto Star. 1141233447Sedwin 1142233447Sedwin# In light of that evidence, we alter the date from the earlier believed 1143233447Sedwin# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1144233447Sedwin# than Thursday) in all Canadian rulesets. 1145233447Sedwin 11462742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 114717200SwollmanRule Canada 1918 only - Apr 14 2:00 1:00 D 1148233447SedwinRule Canada 1918 only - Oct 27 2:00 0 S 1149121098SwollmanRule Canada 1942 only - Feb 9 2:00 1:00 W # War 1150121098SwollmanRule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 115117200SwollmanRule Canada 1945 only - Sep 30 2:00 0 S 115217200SwollmanRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1153153761SwollmanRule Canada 1974 2006 - Oct lastSun 2:00 0 S 1154153761SwollmanRule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1155153761SwollmanRule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1156153761SwollmanRule Canada 2007 max - Nov Sun>=1 2:00 0 S 115717200Swollman 115817200Swollman 1159163302Sru# Newfoundland and Labrador 116017200Swollman 116167578Swollman# From Paul Eggert (2000-10-02): 116267578Swollman# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 116367578Swollman# but the only part of Labrador that follows the rules is the 116467578Swollman# southeast corner, including Port Hope Simpson and Mary's Harbour, 116567578Swollman# but excluding, say, Black Tickle. 116667578Swollman 116717200Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1168121098SwollmanRule StJohns 1917 only - Apr 8 2:00 1:00 D 11692742SwollmanRule StJohns 1917 only - Sep 17 2:00 0 S 1170158421Swollman# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 11712742SwollmanRule StJohns 1919 only - May 5 23:00 1:00 D 11722742SwollmanRule StJohns 1919 only - Aug 12 23:00 0 S 1173158421Swollman# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 11742742SwollmanRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 11752742SwollmanRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1176158421Swollman# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1177158421Swollman# Pottenger. 1178121098SwollmanRule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1179121098SwollmanRule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1180121098Swollman# Whitman gives the following transitions: 1181121098Swollman# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1182158421Swollman# but go with Shanks & Pottenger and assume they used Canadian rules. 11832742Swollman# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1184158421Swollman# Apr 30 - Sep 24; go with Shanks & Pottenger. 11852742SwollmanRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 11862742SwollmanRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 11872742SwollmanRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 11882742SwollmanRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 118967578SwollmanRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 119067578Swollman# From Paul Eggert (2000-10-02): 119167578Swollman# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 119267578Swollman# at 00:01 local time. For now, assume it started in 1987. 1193226298Sedwin 1194226298Sedwin# From Michael Pelley (2011-09-12): 1195226298Sedwin# We received today, Monday, September 12, 2011, notification that the 1196226298Sedwin# changes to the Newfoundland Standard Time Act have been proclaimed. 1197226298Sedwin# The change in the Act stipulates that the change from Daylight Savings 1198226298Sedwin# Time to Standard Time and from Standard Time to Daylight Savings Time 1199226298Sedwin# now occurs at 2:00AM. 1200226298Sedwin# ... 1201226298Sedwin# <a href="http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm"> 1202226298Sedwin# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1203226298Sedwin# </a> 1204226298Sedwin# ... 1205226298Sedwin# MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1206226298Sedwin# Office of the Chief Information Officer 1207226298Sedwin# Executive Council 1208226298Sedwin# Government of Newfoundland & Labrador 1209226298Sedwin 121067578SwollmanRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1211158421SwollmanRule StJohns 1987 2006 - Oct lastSun 0:01 0 S 121267578SwollmanRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1213158421SwollmanRule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1214226298SedwinRule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1215226298SedwinRule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1216158421Swollman# 12172742Swollman# St John's has an apostrophe, but Posix file names can't have apostrophes. 12182742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 12192742SwollmanZone America/St_Johns -3:30:52 - LMT 1884 1220121098Swollman -3:30:52 StJohns N%sT 1918 1221121098Swollman -3:30:52 Canada N%sT 1919 122220094Swollman -3:30:52 StJohns N%sT 1935 Mar 30 1223121098Swollman -3:30 StJohns N%sT 1942 May 11 1224121098Swollman -3:30 Canada N%sT 1946 1225226298Sedwin -3:30 StJohns N%sT 2011 Nov 1226226298Sedwin -3:30 Canada N%sT 12272742Swollman 122867578Swollman# most of east Labrador 122917200Swollman 1230257682Sedwin# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 123120094Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 123220094SwollmanZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1233121098Swollman -3:30:52 - NST 1918 1234121098Swollman -3:30:52 Canada N%sT 1919 123520094Swollman -3:30:52 - NST 1935 Mar 30 123620094Swollman -3:30 - NST 1936 1237121098Swollman -3:30 StJohns N%sT 1942 May 11 1238121098Swollman -3:30 Canada N%sT 1946 123920094Swollman -3:30 StJohns N%sT 1966 Mar 15 2:00 1240226298Sedwin -4:00 StJohns A%sT 2011 Nov 1241226298Sedwin -4:00 Canada A%sT 124220094Swollman 124320094Swollman 1244158421Swollman# west Labrador, Nova Scotia, Prince Edward I 124520094Swollman 1246158421Swollman# From Paul Eggert (2006-03-22): 1247158421Swollman# Shanks & Pottenger write that since 1970 most of this region has been like 1248158421Swollman# Halifax. Many locales did not observe peacetime DST until 1972; 124917200Swollman# Glace Bay, NS is the largest that we know of. 1250158421Swollman# Shanks & Pottenger also write that Liverpool, NS was the only town 1251158421Swollman# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1252158421Swollman# this is a typo. 125317200Swollman 12542742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1255158421SwollmanRule Halifax 1916 only - Apr 1 0:00 1:00 D 1256158421SwollmanRule Halifax 1916 only - Oct 1 0:00 0 S 1257158421SwollmanRule Halifax 1920 only - May 9 0:00 1:00 D 1258158421SwollmanRule Halifax 1920 only - Aug 29 0:00 0 S 1259158421SwollmanRule Halifax 1921 only - May 6 0:00 1:00 D 1260158421SwollmanRule Halifax 1921 1922 - Sep 5 0:00 0 S 1261158421SwollmanRule Halifax 1922 only - Apr 30 0:00 1:00 D 1262158421SwollmanRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1263158421SwollmanRule Halifax 1923 only - Sep 4 0:00 0 S 1264158421SwollmanRule Halifax 1924 only - Sep 15 0:00 0 S 1265158421SwollmanRule Halifax 1925 only - Sep 28 0:00 0 S 1266158421SwollmanRule Halifax 1926 only - May 16 0:00 1:00 D 1267158421SwollmanRule Halifax 1926 only - Sep 13 0:00 0 S 1268158421SwollmanRule Halifax 1927 only - May 1 0:00 1:00 D 1269158421SwollmanRule Halifax 1927 only - Sep 26 0:00 0 S 1270158421SwollmanRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1271158421SwollmanRule Halifax 1928 only - Sep 9 0:00 0 S 1272158421SwollmanRule Halifax 1929 only - Sep 3 0:00 0 S 1273158421SwollmanRule Halifax 1930 only - Sep 15 0:00 0 S 1274158421SwollmanRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1275158421SwollmanRule Halifax 1932 only - May 1 0:00 1:00 D 1276158421SwollmanRule Halifax 1933 only - Apr 30 0:00 1:00 D 1277158421SwollmanRule Halifax 1933 only - Oct 2 0:00 0 S 1278158421SwollmanRule Halifax 1934 only - May 20 0:00 1:00 D 1279158421SwollmanRule Halifax 1934 only - Sep 16 0:00 0 S 1280158421SwollmanRule Halifax 1935 only - Jun 2 0:00 1:00 D 1281158421SwollmanRule Halifax 1935 only - Sep 30 0:00 0 S 1282158421SwollmanRule Halifax 1936 only - Jun 1 0:00 1:00 D 1283158421SwollmanRule Halifax 1936 only - Sep 14 0:00 0 S 1284158421SwollmanRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1285158421SwollmanRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1286158421SwollmanRule Halifax 1939 only - May 28 0:00 1:00 D 1287158421SwollmanRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1288158421SwollmanRule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1289158421SwollmanRule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1290158421SwollmanRule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1291158421SwollmanRule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1292158421SwollmanRule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1293158421SwollmanRule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1294158421SwollmanRule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1295158421SwollmanRule Halifax 1962 1973 - Oct lastSun 2:00 0 S 12962742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 12972742SwollmanZone America/Halifax -4:14:24 - LMT 1902 Jun 15 1298121098Swollman -4:00 Halifax A%sT 1918 1299121098Swollman -4:00 Canada A%sT 1919 1300121098Swollman -4:00 Halifax A%sT 1942 Feb 9 2:00s 1301121098Swollman -4:00 Canada A%sT 1946 1302121098Swollman -4:00 Halifax A%sT 1974 1303121098Swollman -4:00 Canada A%sT 130417200SwollmanZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 130517200Swollman -4:00 Canada A%sT 1953 130617200Swollman -4:00 Halifax A%sT 1954 130717200Swollman -4:00 - AST 1972 1308121098Swollman -4:00 Halifax A%sT 1974 1309121098Swollman -4:00 Canada A%sT 13102742Swollman 1311158421Swollman# New Brunswick 13128029Swollman 1313169811Swollman# From Paul Eggert (2007-01-31): 1314169811Swollman# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1315169811Swollman# says they changed at 00:01 through 2006, and 1316158421Swollman# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1317169811Swollman# clear that this was the case since at least 1993. 1318163302Sru# For now, assume it started in 1993. 1319158421Swollman 1320158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1321158421SwollmanRule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1322158421SwollmanRule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1323158421SwollmanRule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1324158421SwollmanRule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1325158421SwollmanRule Moncton 1939 only - May 27 1:00 1:00 D 1326158421SwollmanRule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1327158421SwollmanRule Moncton 1940 only - May 19 1:00 1:00 D 1328158421SwollmanRule Moncton 1941 only - May 4 1:00 1:00 D 1329158421SwollmanRule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1330158421SwollmanRule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1331158421SwollmanRule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1332158421SwollmanRule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1333158421SwollmanRule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1334158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1335158421SwollmanZone America/Moncton -4:19:08 - LMT 1883 Dec 9 1336158421Swollman -5:00 - EST 1902 Jun 15 1337158421Swollman -4:00 Canada A%sT 1933 1338158421Swollman -4:00 Moncton A%sT 1942 1339158421Swollman -4:00 Canada A%sT 1946 1340158421Swollman -4:00 Moncton A%sT 1973 1341158421Swollman -4:00 Canada A%sT 1993 1342163302Sru -4:00 Moncton A%sT 2007 1343163302Sru -4:00 Canada A%sT 1344158421Swollman 1345163302Sru# Quebec 134617200Swollman 1347257682Sedwin# From Paul Eggert (2013-08-30): 1348257682Sedwin# Since 1970 most of Quebec has been like Toronto. 1349257682Sedwin# However, because earlier versions of the tz database mistakenly relied on data 1350257682Sedwin# from Shanks & Pottenger saying that Quebec differed from Ontario after 1970, 1351257682Sedwin# a separate entry was created for most of Quebec. We're loath to lose 1352257682Sedwin# its pre-1970 info, even though the tz database is normally limited to 1353257682Sedwin# zones that differ after 1970, so keep this otherwise out-of-scope entry. 1354163302Sru 1355163302Sru# Matthews and Vincent (1998) also write that Quebec east of the -63 1356163302Sru# meridian is supposed to observe AST, but residents as far east as 1357163302Sru# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1358257682Sedwin# The Quebec department of justice writes in 1359257682Sedwin# "The situation in Minganie and Basse-Cote-Nord" 1360257682Sedwin# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm 1361257682Sedwin# that the coastal strip from just east of Natashquan to Blanc-Sablon 1362257682Sedwin# observes Atlantic standard time all year round. 1363257682Sedwin# http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en 1364163302Sru# says this common practice was codified into law as of 2007. 1365163302Sru# For lack of better info, guess this practice began around 1970, contra to 1366163302Sru# Shanks & Pottenger who have this region observing AST/ADT. 1367257682Sedwin# for post-1970 data America/Puerto_Rico. 1368163302Sru 1369163302Sru# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1370163302SruRule Mont 1917 only - Mar 25 2:00 1:00 D 1371163302SruRule Mont 1917 only - Apr 24 0:00 0 S 1372163302SruRule Mont 1919 only - Mar 31 2:30 1:00 D 1373163302SruRule Mont 1919 only - Oct 25 2:30 0 S 1374163302SruRule Mont 1920 only - May 2 2:30 1:00 D 1375163302SruRule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 1376163302SruRule Mont 1921 only - May 1 2:00 1:00 D 1377163302SruRule Mont 1922 only - Apr 30 2:00 1:00 D 1378163302SruRule Mont 1924 only - May 17 2:00 1:00 D 1379163302SruRule Mont 1924 1926 - Sep lastSun 2:30 0 S 1380163302SruRule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1381163302Sru# The 1927-to-1937 rules can be expressed more simply as 1382163302Sru# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1383163302Sru# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 1384163302Sru# The rules below avoid use of 24:00 1385163302Sru# (which pre-1998 versions of zic cannot handle). 1386163302SruRule Mont 1927 only - May 1 0:00 1:00 D 1387163302SruRule Mont 1927 1932 - Sep lastSun 0:00 0 S 1388163302SruRule Mont 1928 1931 - Apr lastSun 0:00 1:00 D 1389163302SruRule Mont 1932 only - May 1 0:00 1:00 D 1390163302SruRule Mont 1933 1940 - Apr lastSun 0:00 1:00 D 1391163302SruRule Mont 1933 only - Oct 1 0:00 0 S 1392163302SruRule Mont 1934 1939 - Sep lastSun 0:00 0 S 1393163302SruRule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 1394163302SruRule Mont 1945 1948 - Sep lastSun 2:00 0 S 1395163302SruRule Mont 1949 1950 - Oct lastSun 2:00 0 S 1396163302SruRule Mont 1951 1956 - Sep lastSun 2:00 0 S 1397163302SruRule Mont 1957 1973 - Oct lastSun 2:00 0 S 1398163302Sru 1399163302Sru# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1400163302SruZone America/Blanc-Sablon -3:48:28 - LMT 1884 1401163302Sru -4:00 Canada A%sT 1970 1402163302Sru -4:00 - AST 1403163302SruZone America/Montreal -4:54:16 - LMT 1884 1404163302Sru -5:00 Mont E%sT 1918 1405163302Sru -5:00 Canada E%sT 1919 1406163302Sru -5:00 Mont E%sT 1942 Feb 9 2:00s 1407163302Sru -5:00 Canada E%sT 1946 1408163302Sru -5:00 Mont E%sT 1974 1409163302Sru -5:00 Canada E%sT 1410163302Sru 1411163302Sru# Ontario 1412163302Sru 1413163302Sru# From Paul Eggert (2006-07-09): 1414163302Sru# Shanks & Pottenger write that since 1970 most of Ontario has been like 1415163302Sru# Toronto. 141617200Swollman# Thunder Bay skipped DST in 1973. 141717200Swollman# Many smaller locales did not observe peacetime DST until 1974; 141817200Swollman# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 141917200Swollman# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 142017200Swollman 1421121098Swollman# From Mark Brader (2003-07-26): 1422121098Swollman# [According to the Toronto Star] Orillia, Ontario, adopted DST 1423121098Swollman# effective Saturday, 1912-06-22, 22:00; the article mentions that 1424121098Swollman# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1425121098Swollman# have already done so. In Orillia DST was to run until Saturday, 1426121098Swollman# 1912-08-31 (no time mentioned), but it was met with considerable 1427121098Swollman# hostility from certain segments of the public, and was revoked after 1428121098Swollman# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but 1429121098Swollman# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1430121098Swollman# earlier in June). 1431121098Swollman# 1432121098Swollman# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1433121098Swollman 143443014Swollman# From Paul Eggert (1997-10-17): 1435121098Swollman# Mark Brader writes that an article in the 1997-10-14 Toronto Star 143643014Swollman# says that Atikokan, Ontario currently does not observe DST, 143743014Swollman# but will vote on 11-10 whether to use EST/EDT. 143843014Swollman# He also writes that the 143943014Swollman# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 144043014Swollman# Ontario Time Act (1990, Chapter T.9) 144143014Swollman# </a> 144243014Swollman# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 144343014Swollman# Officially Atikokan is therefore on CST/CDT, and most likely this report 144443014Swollman# concerns a non-official time observed as a matter of local practice. 1445158421Swollman# 144667578Swollman# From Paul Eggert (2000-10-02): 144767578Swollman# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 144867578Swollman# New Osnaburgh observe CST all year, that Big Trout Lake observes 144967578Swollman# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 145067578Swollman# violation of the official Ontario rules. 1451163302Sru# 1452163302Sru# From Paul Eggert (2006-07-09): 1453163302Sru# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1454163302Sru# 2005-07-21 Chronicle-Journal, which said: 1455163302Sru# 1456163302Sru# The clocks in Atikokan stay set on standard time year-round. 1457163302Sru# This means they spend about half the time on central time and 1458163302Sru# the other half on eastern time. 1459163302Sru# 1460163302Sru# For the most part, the system works, Mayor Dennis Brown said. 1461163302Sru# 1462163302Sru# "The majority of businesses in Atikokan deal more with Eastern 1463163302Sru# Canada, but there are some that deal with Western Canada," he 1464163302Sru# said. "I don't see any changes happening here." 1465163302Sru# 1466163302Sru# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1467163302Sru# [New Osnaburgh] follow the same practice." 146867578Swollman 1469163302Sru# From Garry McKinnon (2006-07-14) via Chris Walton: 1470163302Sru# I chatted with a member of my board who has an outstanding memory 1471163302Sru# and a long history in Atikokan (and in the telecom industry) and he 1472163302Sru# can say for certain that Atikokan has been practicing the current 1473163302Sru# time keeping since 1952, at least. 1474163302Sru 1475163302Sru# From Paul Eggert (2006-07-17): 1476163302Sru# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1477163302Sru# ever since standard time was introduced, but the information from 1478163302Sru# McKinnon sounds more authoritative. For now, assume that Atikokan 1479163302Sru# switched to EST immediately after WWII era daylight saving time 1480163302Sru# ended. This matches the old (less-populous) America/Coral_Harbour 1481163302Sru# entry since our cutoff date of 1970, so we can move 1482163302Sru# America/Coral_Harbour to the 'backward' file. 1483163302Sru 1484210718Sedwin# From Mark Brader (2010-03-06): 1485210718Sedwin# 1486210718Sedwin# Currently the database has: 1487210718Sedwin# 1488210718Sedwin# # Ontario 1489210718Sedwin# 1490210718Sedwin# # From Paul Eggert (2006-07-09): 1491210718Sedwin# # Shanks & Pottenger write that since 1970 most of Ontario has been like 1492210718Sedwin# # Toronto. 1493210718Sedwin# # Thunder Bay skipped DST in 1973. 1494210718Sedwin# # Many smaller locales did not observe peacetime DST until 1974; 1495210718Sedwin# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1496210718Sedwin# 1497210718Sedwin# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1498210718Sedwin# right corner of page 1, it says that Toronto will return to standard 1499210718Sedwin# time at 2 am Sunday morning (which agrees with the database), and that: 1500210718Sedwin# 1501210718Sedwin# The one-hour setback will go into effect throughout most of Ontario, 1502210718Sedwin# except in areas like Windsor which remains on standard time all year. 1503210718Sedwin# 1504210718Sedwin# Windsor is, of course, a lot larger than Nipigon. 1505210718Sedwin# 1506210718Sedwin# I only came across this incidentally. I don't know if Windsor began 1507210718Sedwin# observing DST when Detroit did, or in 1974, or on some other date. 1508210718Sedwin# 1509210718Sedwin# By the way, the article continues by noting that: 1510210718Sedwin# 1511210718Sedwin# Some cities in the United States have pushed the deadline back 1512210718Sedwin# three weeks and will change over from daylight saving in October. 1513210718Sedwin 1514210718Sedwin# From Arthur David Olson (2010-07-17): 1515210718Sedwin# 1516210718Sedwin# "Standard Time and Time Zones in Canada" appeared in 1517210718Sedwin# The Journal of The Royal Astronomical Society of Canada, 1518210718Sedwin# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1519210718Sedwin# was available at 1520210718Sedwin# <a href="http://adsabs.harvard.edu/full/1932JRASC..26...49S"> 1521210718Sedwin# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1522210718Sedwin# </a> 1523210718Sedwin# 1524210718Sedwin# It includes the text below (starting on page 57): 1525210718Sedwin# 1526210718Sedwin# A list of the places in Canada using daylight saving time would 1527210718Sedwin# require yearly revision. From information kindly furnished by 1528210718Sedwin# the provincial governments and by the postmasters in many cities 1529210718Sedwin# and towns, it is found that the following places used daylight sav- 1530210718Sedwin# ing in 1930. The information for the province of Quebec is definite, 1531210718Sedwin# for the other provinces only approximate: 1532210718Sedwin# 1533210718Sedwin# Province Daylight saving time used 1534210718Sedwin# Prince Edward Island Not used. 1535210718Sedwin# Nova Scotia In Halifax only. 1536210718Sedwin# New Brunswick In St. John only. 1537210718Sedwin# Quebec In the following places: 1538210718Sedwin# Montreal Lachine 1539210718Sedwin# Quebec Mont-Royal 1540210718Sedwin# Levis Iberville 1541210718Sedwin# St. Lambert Cap de la Madeleine 1542210718Sedwin# Verdun Loretteville 1543210718Sedwin# Westmount Richmond 1544210718Sedwin# Outremont St. Jerome 1545210718Sedwin# Longueuil Greenfield Park 1546210718Sedwin# Arvida Waterloo 1547210718Sedwin# Chambly-Canton Beaulieu 1548210718Sedwin# Melbourne La Tuque 1549210718Sedwin# St. Theophile Buckingham 1550210718Sedwin# Ontario Used generally in the cities and towns along 1551210718Sedwin# the southerly part of the province. Not 1552210718Sedwin# used in the northwesterlhy part. 1553210718Sedwin# Manitoba Not used. 1554210718Sedwin# Saskatchewan In Regina only. 1555210718Sedwin# Alberta Not used. 1556210718Sedwin# British Columbia Not used. 1557210718Sedwin# 1558210718Sedwin# With some exceptions, the use of daylight saving may be said to be limited 1559210718Sedwin# to those cities and towns lying between Quebec city and Windsor, Ont. 1560210718Sedwin 15612742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1562121098SwollmanRule Toronto 1919 only - Mar 30 23:30 1:00 D 1563121098SwollmanRule Toronto 1919 only - Oct 26 0:00 0 S 1564121098SwollmanRule Toronto 1920 only - May 2 2:00 1:00 D 1565121098SwollmanRule Toronto 1920 only - Sep 26 0:00 0 S 1566121098SwollmanRule Toronto 1921 only - May 15 2:00 1:00 D 1567121098SwollmanRule Toronto 1921 only - Sep 15 2:00 0 S 1568121098SwollmanRule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1569158421Swollman# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1570158421Swollman# was meant. 1571121098SwollmanRule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1572121098SwollmanRule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1573136638Swollman# The 1927-to-1939 rules can be expressed more simply as 1574136638Swollman# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1575136638Swollman# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1576136638Swollman# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1577136638Swollman# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1578136638Swollman# The rules below avoid use of Sun>=25 1579136638Swollman# (which pre-2004 versions of zic cannot handle). 1580136638SwollmanRule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1581136638SwollmanRule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1582136638SwollmanRule Toronto 1932 only - May 1 2:00 1:00 D 1583136638SwollmanRule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1584136638SwollmanRule Toronto 1933 only - Oct 1 2:00 0 S 1585136638SwollmanRule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1586121098SwollmanRule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1587121098SwollmanRule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1588121098SwollmanRule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1589121098SwollmanRule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1590121098SwollmanRule Toronto 1949 only - Nov lastSun 0:00 0 S 1591121098SwollmanRule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1592121098SwollmanRule Toronto 1950 only - Nov lastSun 2:00 0 S 1593121098SwollmanRule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1594158421Swollman# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1595163302Sru# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1596163302Sru# is wrong, and that he had confirmed it by checking the 1971-10-30 1597163302Sru# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1598121098SwollmanRule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1599121098Swollman 1600121098Swollman# From Paul Eggert (2003-07-27): 1601121098Swollman# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1602121098Swollman# Port Arthur, Ontario, the principle of the Bill has been in 1603121098Swollman# operation for the past three years, and in the City of Moose Jaw, 1604136638Swollman# Saskatchewan, for one year." 1605121098Swollman 1606136638Swollman# From David Bryan via Tory Tronrud, Director/Curator, 1607136638Swollman# Thunder Bay Museum (2003-11-12): 1608136638Swollman# There is some suggestion, however, that, by-law or not, daylight 1609136638Swollman# savings time was being practiced in Fort William and Port Arthur 1610136638Swollman# before 1909.... [I]n 1910, the line between the Eastern and Central 1611136638Swollman# Time Zones was permanently moved about two hundred miles west to 1612136638Swollman# include the Thunder Bay area.... When Canada adopted daylight 1613136638Swollman# savings time in 1916, Fort William and Port Arthur, having done so 1614136638Swollman# already, did not change their clocks.... During the Second World 1615136638Swollman# War,... [t]he cities agreed to implement DST during the summer 1616136638Swollman# months for the remainder of the war years. 1617136638Swollman 16182742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1619121098SwollmanZone America/Toronto -5:17:32 - LMT 1895 1620121098Swollman -5:00 Canada E%sT 1919 1621121098Swollman -5:00 Toronto E%sT 1942 Feb 9 2:00s 1622121098Swollman -5:00 Canada E%sT 1946 1623121098Swollman -5:00 Toronto E%sT 1974 1624121098Swollman -5:00 Canada E%sT 162517200SwollmanZone America/Thunder_Bay -5:57:00 - LMT 1895 1626136638Swollman -6:00 - CST 1910 1627136638Swollman -5:00 - EST 1942 162817200Swollman -5:00 Canada E%sT 1970 1629257682Sedwin -5:00 Toronto E%sT 1973 163017200Swollman -5:00 - EST 1974 163117200Swollman -5:00 Canada E%sT 163217200SwollmanZone America/Nipigon -5:53:04 - LMT 1895 1633121098Swollman -5:00 Canada E%sT 1940 Sep 29 1634121098Swollman -5:00 1:00 EDT 1942 Feb 9 2:00s 163517200Swollman -5:00 Canada E%sT 1636163302SruZone America/Rainy_River -6:18:16 - LMT 1895 1637121098Swollman -6:00 Canada C%sT 1940 Sep 29 1638121098Swollman -6:00 1:00 CDT 1942 Feb 9 2:00s 163917200Swollman -6:00 Canada C%sT 1640163302SruZone America/Atikokan -6:06:28 - LMT 1895 1641163302Sru -6:00 Canada C%sT 1940 Sep 29 1642163302Sru -6:00 1:00 CDT 1942 Feb 9 2:00s 1643163302Sru -6:00 Canada C%sT 1945 Sep 30 2:00 1644163302Sru -5:00 - EST 16452742Swollman 16468029Swollman 164717200Swollman# Manitoba 164819878Swollman 1649158421Swollman# From Rob Douglas (2006-04-06): 1650158421Swollman# the old Manitoba Time Act - as amended by Bill 2, assented to 1651158421Swollman# March 27, 1987 ... said ... 1652158421Swollman# "between two o'clock Central Standard Time in the morning of 1653158421Swollman# the first Sunday of April of each year and two o'clock Central 1654158421Swollman# Standard Time in the morning of the last Sunday of October next 1655158421Swollman# following, one hour in advance of Central Standard Time."... 1656158421Swollman# I believe that the English legislation [of the old time act] had = 1657158421Swollman# been assented to (March 22, 1967).... 1658158421Swollman# Also, as far as I can tell, there was no order-in-council varying 1659158421Swollman# the time of Daylight Saving Time for 2005 and so the provisions of 1660158421Swollman# the 1987 version would apply - the changeover was at 2:00 Central 1661158421Swollman# Standard Time (i.e. not until 3:00 Central Daylight Time). 1662158421Swollman 1663158421Swollman# From Paul Eggert (2006-04-10): 1664158421Swollman# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1665158421Swollman# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1666158421Swollman# it was also 02:00s in 1966. 1667158421Swollman 16682742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16692742SwollmanRule Winn 1916 only - Apr 23 0:00 1:00 D 16702742SwollmanRule Winn 1916 only - Sep 17 0:00 0 S 16712742SwollmanRule Winn 1918 only - Apr 14 2:00 1:00 D 1672233447SedwinRule Winn 1918 only - Oct 27 2:00 0 S 16732742SwollmanRule Winn 1937 only - May 16 2:00 1:00 D 167414343SwollmanRule Winn 1937 only - Sep 26 2:00 0 S 1675121098SwollmanRule Winn 1942 only - Feb 9 2:00 1:00 W # War 1676121098SwollmanRule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 16772742SwollmanRule Winn 1945 only - Sep lastSun 2:00 0 S 16782742SwollmanRule Winn 1946 only - May 12 2:00 1:00 D 16792742SwollmanRule Winn 1946 only - Oct 13 2:00 0 S 16802742SwollmanRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 168114343SwollmanRule Winn 1947 1949 - Sep lastSun 2:00 0 S 168214343SwollmanRule Winn 1950 only - May 1 2:00 1:00 D 168314343SwollmanRule Winn 1950 only - Sep 30 2:00 0 S 168414343SwollmanRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 168514343SwollmanRule Winn 1951 1958 - Sep lastSun 2:00 0 S 16862742SwollmanRule Winn 1959 only - Oct lastSun 2:00 0 S 16872742SwollmanRule Winn 1960 only - Sep lastSun 2:00 0 S 16882742SwollmanRule Winn 1963 only - Apr lastSun 2:00 1:00 D 168914343SwollmanRule Winn 1963 only - Sep 22 2:00 0 S 1690158421SwollmanRule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1691158421SwollmanRule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1692158421SwollmanRule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 16932742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16942742SwollmanZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1695158421Swollman -6:00 Winn C%sT 2006 1696158421Swollman -6:00 Canada C%sT 16972742Swollman 16988029Swollman 169917200Swollman# Saskatchewan 170017200Swollman 1701121098Swollman# From Mark Brader (2003-07-26): 1702121098Swollman# The first actual adoption of DST in Canada was at the municipal 1703121098Swollman# level. As the [Toronto] Star put it (1912-06-07), "While people 1704121098Swollman# elsewhere have long been talking of legislation to save daylight, 1705121098Swollman# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1706121098Swollman# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1707121098Swollman# presumably late evening, as below), and would run until "the end of 1708121098Swollman# the summer". The discrepancy between municipal time and railroad 1709121098Swollman# time was noted. 1710121098Swollman 1711121098Swollman# From Paul Eggert (2003-07-27): 1712121098Swollman# Willett (1914-03) notes that DST "has been in operation ... in the 1713121098Swollman# City of Moose Jaw, Saskatchewan, for one year." 1714121098Swollman 1715158421Swollman# From Paul Eggert (2006-03-22): 1716158421Swollman# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 171717200Swollman# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 171817200Swollman# Other western towns (e.g. Lloydminster) are like Edmonton. 171967578Swollman# Matthews and Vincent (1998) write that Denare Beach and Creighton 172067578Swollman# are like Winnipeg, in violation of Saskatchewan law. 172117200Swollman 1722149514Swollman# From W. Jones (1992-11-06): 172317200Swollman# The. . .below is based on information I got from our law library, the 172417200Swollman# provincial archives, and the provincial Community Services department. 172517200Swollman# A precise history would require digging through newspaper archives, and 172617200Swollman# since you didn't say what you wanted, I didn't bother. 172717200Swollman# 172817200Swollman# Saskatchewan is split by a time zone meridian (105W) and over the years 172917200Swollman# the boundary became pretty ragged as communities near it reevaluated 173017200Swollman# their affiliations in one direction or the other. In 1965 a provincial 173117200Swollman# referendum favoured legislating common time practices. 173217200Swollman# 173317200Swollman# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 173417200Swollman# Saskatchewan 1978) was proclaimed, and established that the eastern 173517200Swollman# part of Saskatchewan would use CST year round, that districts in 173617200Swollman# northwest Saskatchewan would by default follow CST but could opt to 173717200Swollman# follow Mountain Time rules (thus 1 hour difference in the winter and 173817200Swollman# zero in the summer), and that districts in southwest Saskatchewan would 173917200Swollman# by default follow MT but could opt to follow CST. 174017200Swollman# 174117200Swollman# It took a few years for the dust to settle (I know one story of a town 174217200Swollman# on one time zone having its school in another, such that a mom had to 174317200Swollman# serve her family lunch in two shifts), but presently it seems that only 174417200Swollman# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 174517200Swollman# rules any more; all other districts appear to have used CST year round 174617200Swollman# since sometime in the 1960s. 174717200Swollman 1748163302Sru# From Chris Walton (2006-06-26): 1749163302Sru# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1750163302Sru# long and rather painful to read. 1751163302Sru# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1752163302Sru 17532742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17542742SwollmanRule Regina 1918 only - Apr 14 2:00 1:00 D 1755233447SedwinRule Regina 1918 only - Oct 27 2:00 0 S 17562742SwollmanRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 17572742SwollmanRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 17582742SwollmanRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 17592742SwollmanRule Regina 1937 only - Oct Sun>=8 0:00 0 S 17602742SwollmanRule Regina 1938 only - Oct Sun>=1 0:00 0 S 17612742SwollmanRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1762121098SwollmanRule Regina 1942 only - Feb 9 2:00 1:00 W # War 1763121098SwollmanRule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 17642742SwollmanRule Regina 1945 only - Sep lastSun 2:00 0 S 176517200SwollmanRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 176617200SwollmanRule Regina 1946 only - Oct Sun>=8 2:00 0 S 1767121098SwollmanRule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1768121098SwollmanRule Regina 1947 1957 - Sep lastSun 2:00 0 S 1769121098SwollmanRule Regina 1959 only - Apr lastSun 2:00 1:00 D 177017200SwollmanRule Regina 1959 only - Oct lastSun 2:00 0 S 177117200Swollman# 177217200SwollmanRule Swift 1957 only - Apr lastSun 2:00 1:00 D 177317200SwollmanRule Swift 1957 only - Oct lastSun 2:00 0 S 177417200SwollmanRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 177517200SwollmanRule Swift 1959 only - Oct lastSun 2:00 0 S 177617200SwollmanRule Swift 1960 1961 - Sep lastSun 2:00 0 S 17772742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 177817200SwollmanZone America/Regina -6:58:36 - LMT 1905 Sep 177917200Swollman -7:00 Regina M%sT 1960 Apr lastSun 2:00 17802742Swollman -6:00 - CST 178117200SwollmanZone America/Swift_Current -7:11:20 - LMT 1905 Sep 178217200Swollman -7:00 Canada M%sT 1946 Apr lastSun 2:00 178317200Swollman -7:00 Regina M%sT 1950 178417200Swollman -7:00 Swift M%sT 1972 Apr lastSun 2:00 178517200Swollman -6:00 - CST 17862742Swollman 17878029Swollman 178817200Swollman# Alberta 178917200Swollman 17902742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17912742SwollmanRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1792233447SedwinRule Edm 1918 only - Oct 27 2:00 0 S 17932742SwollmanRule Edm 1919 only - May 27 2:00 0 S 17942742SwollmanRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 17952742SwollmanRule Edm 1920 only - Oct lastSun 2:00 0 S 17962742SwollmanRule Edm 1921 1923 - Sep lastSun 2:00 0 S 1797121098SwollmanRule Edm 1942 only - Feb 9 2:00 1:00 W # War 1798121098SwollmanRule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 17992742SwollmanRule Edm 1945 only - Sep lastSun 2:00 0 S 18002742SwollmanRule Edm 1947 only - Apr lastSun 2:00 1:00 D 18012742SwollmanRule Edm 1947 only - Sep lastSun 2:00 0 S 18022742SwollmanRule Edm 1967 only - Apr lastSun 2:00 1:00 D 18032742SwollmanRule Edm 1967 only - Oct lastSun 2:00 0 S 18042742SwollmanRule Edm 1969 only - Apr lastSun 2:00 1:00 D 18052742SwollmanRule Edm 1969 only - Oct lastSun 2:00 0 S 18062742SwollmanRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1807158421SwollmanRule Edm 1972 2006 - Oct lastSun 2:00 0 S 18082742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18092742SwollmanZone America/Edmonton -7:33:52 - LMT 1906 Sep 1810158421Swollman -7:00 Edm M%sT 1987 1811158421Swollman -7:00 Canada M%sT 18122742Swollman 18138029Swollman 181417200Swollman# British Columbia 181517200Swollman 1816158421Swollman# From Paul Eggert (2006-03-22): 1817158421Swollman# Shanks & Pottenger write that since 1970 most of this region has 1818158421Swollman# been like Vancouver. 181958787Sru# Dawson Creek uses MST. Much of east BC is like Edmonton. 182067578Swollman# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 182117200Swollman 1822233447Sedwin# It seems though that (re: Creston) is not entirely correct: 1823233447Sedwin 1824233447Sedwin# From Chris Walton (2011-12-01): 1825233447Sedwin# There are two areas within the Canadian province of British Columbia 1826233447Sedwin# that do not currently observe daylight saving: 1827233447Sedwin# a) The Creston Valley (includes the town of Creston and surrounding area) 1828233447Sedwin# b) The eastern half of the Peace River Regional District 1829233447Sedwin# (includes the cities of Dawson Creek and Fort St. John) 1830233447Sedwin 1831233447Sedwin# Earlier this year I stumbled across a detailed article about the time 1832233447Sedwin# keeping history of Creston; it was written by Tammy Hardwick who is the 1833233447Sedwin# manager of the Creston & District Museum. The article was written in May 2009. 1834233447Sedwin# <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260"> 1835233447Sedwin# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1836233447Sedwin# </a> 1837233447Sedwin# According to the article, Creston has not changed its clocks since June 1918. 1838233447Sedwin# i.e. Creston has been stuck on UTC-7 for 93 years. 1839233447Sedwin# Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1840233447Sedwin 1841233447Sedwin# Unfortunately the exact date for the time change in June 1918 remains 1842233447Sedwin# unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1843233447Sedwin# ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1844233447Sedwin# as plausible as any other date (in June). She also said that after writing the 1845233447Sedwin# article she had discovered another time change in 1916; this is the subject 1846233447Sedwin# of another article which she wrote in October 2010. 1847233447Sedwin# <a href="http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56"> 1848233447Sedwin# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1849233447Sedwin# </a> 1850233447Sedwin 1851233447Sedwin# Here is a summary of the three clock change events in Creston's history: 1852233447Sedwin# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1853233447Sedwin# Exact date unknown 1854240461Sedwin# 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1855233447Sedwin# Exact date in October unknown; Sunday October 1 is a reasonable guess. 1856233447Sedwin# 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1857233447Sedwin# Exact date in June unknown; Sunday June 2 is a reasonable guess. 1858233447Sedwin# note#1: 1859233447Sedwin# On Oct 27/1918 when daylight saving ended in the rest of Canada, 1860233447Sedwin# Creston did not change its clocks. 1861233447Sedwin# note#2: 1862233447Sedwin# During WWII when the Federal Government legislated a mandatory clock change, 1863233447Sedwin# Creston did not oblige. 1864233447Sedwin# note#3: 1865233447Sedwin# There is no guarantee that Creston will remain on Mountain Standard Time 1866233447Sedwin# (UTC-7) forever. 1867233447Sedwin# The subject was debated at least once this year by the town Council. 1868233447Sedwin# <a href="http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html"> 1869233447Sedwin# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1870233447Sedwin# </a> 1871233447Sedwin 1872233447Sedwin# During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1873233447Sedwin# In Creston, that was handled by shifting the area to PST (-8:00) then applying 1874233447Sedwin# summer time to cause the offset to be -7:00, the same as it had been before 1875233447Sedwin# the change. It can be argued that the timezone abbreviation during this 1876233447Sedwin# period should be PDT rather than MST, but that doesn't seem important enough 1877233447Sedwin# (to anyone) to further complicate the rules. 1878233447Sedwin 1879233447Sedwin# The transition dates (and times) are guesses. 1880233447Sedwin 18812742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 18822742SwollmanRule Vanc 1918 only - Apr 14 2:00 1:00 D 1883233447SedwinRule Vanc 1918 only - Oct 27 2:00 0 S 1884121098SwollmanRule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1885121098SwollmanRule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 18862742SwollmanRule Vanc 1945 only - Sep 30 2:00 0 S 18872742SwollmanRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 18882742SwollmanRule Vanc 1946 only - Oct 13 2:00 0 S 18892742SwollmanRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1890158421SwollmanRule Vanc 1962 2006 - Oct lastSun 2:00 0 S 18912742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18922742SwollmanZone America/Vancouver -8:12:28 - LMT 1884 1893158421Swollman -8:00 Vanc P%sT 1987 1894158421Swollman -8:00 Canada P%sT 189517200SwollmanZone America/Dawson_Creek -8:00:56 - LMT 1884 189617200Swollman -8:00 Canada P%sT 1947 189717200Swollman -8:00 Vanc P%sT 1972 Aug 30 2:00 189817200Swollman -7:00 - MST 1899233447SedwinZone America/Creston -7:46:04 - LMT 1884 1900233447Sedwin -7:00 - MST 1916 Oct 1 1901233447Sedwin -8:00 - PST 1918 Jun 2 1902233447Sedwin -7:00 - MST 19032742Swollman 190458787Sru# Northwest Territories, Nunavut, Yukon 190517200Swollman 1906158421Swollman# From Paul Eggert (2006-03-22): 190717200Swollman# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1908149514Swollman# Mathew Englander (1996-10-07) gives the following refs: 190920094Swollman# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 191020094Swollman# c. 7 defines Yukon standard time as UTC-9. This is still valid; 191120094Swollman# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 191220094Swollman# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 191320094Swollman# * O.I.C. 1980/02 established DST. 191420094Swollman# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1915158421Swollman# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1916158421Swollman# with Englander. 1917163302Sru# From Chris Walton (2006-06-26): 1918163302Sru# Here is a link to the old daylight saving portion of the interpretation 1919163302Sru# act which was last updated in 1987: 1920163302Sru# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf 192117200Swollman 192258787Sru# From Rives McDow (1999-09-04): 192358787Sru# Nunavut ... moved ... to incorporate the whole territory into one time zone. 192458787Sru# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 192558787Sru# Nunavut moves to single time zone Oct. 31 192658787Sru# </a> 192758787Sru# 192858787Sru# From Antoine Leca (1999-09-06): 192958787Sru# We then need to create a new timezone for the Kitikmeot region of Nunavut 193058787Sru# to differentiate it from the Yellowknife region. 193158787Sru 193258787Sru# From Paul Eggert (1999-09-20): 193358787Sru# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 193458787Sru# Basic Facts: The New Territory 193586222Swollman# </a> (1999) reports that Pangnirtung operates on eastern time, 193658787Sru# and that Coral Harbour does not observe DST. We don't know when 193786222Swollman# Pangnirtung switched to eastern time; we'll guess 1995. 193858787Sru 193958787Sru# From Rives McDow (1999-11-08): 194058787Sru# On October 31, when the rest of Nunavut went to Central time, 194158787Sru# Pangnirtung wobbled. Here is the result of their wobble: 194258787Sru# 194358787Sru# The following businesses and organizations in Pangnirtung use Central Time: 194458787Sru# 194558787Sru# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 194658787Sru# Eastern Arctic National Parks, A & D Specialist 194758787Sru# 194858787Sru# The following businesses and organizations in Pangnirtung use Eastern Time: 194958787Sru# 195058787Sru# Hamlet office, All other businesses, Both schools, Airport operator 195158787Sru# 195258787Sru# This has made for an interesting situation there, which warranted the news. 195358787Sru# No one there that I spoke with seems concerned, or has plans to 195458787Sru# change the local methods of keeping time, as it evidently does not 195558787Sru# really interfere with any activities or make things difficult locally. 195658787Sru# They plan to celebrate New Year's turn-over twice, one hour apart, 195758787Sru# so it appears that the situation will last at least that long. 195858787Sru# The Nunavut Intergovernmental Affairs hopes that they will "come to 195958787Sru# their senses", but the locals evidently don't see any problem with 196058787Sru# the current state of affairs. 196158787Sru 196258787Sru# From Michaela Rodrigue, writing in the 196358787Sru# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 196458787Sru# Nunatsiaq News (1999-11-19)</a>: 196558787Sru# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 196658787Sru# central - or Nunavut time - for government offices, and eastern time 196758787Sru# for municipal offices and schools.... Igloolik [was similar but then] 196858787Sru# made the switch to central time on Saturday, Nov. 6. 196958787Sru 197067578Swollman# From Paul Eggert (2000-10-02): 197167578Swollman# Matthews and Vincent (1998) say the following, but we lack histories 197267578Swollman# for these potential new Zones. 197375267Swollman# 197467578Swollman# The Canadian Forces station at Alert uses Eastern Time while the 197567578Swollman# handful of residents at the Eureka weather station [in the Central 197667578Swollman# zone] skip daylight savings. Baffin Island, which is crossed by the 197767578Swollman# Central, Eastern and Atlantic Time zones only uses Eastern Time. 197867578Swollman# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 197967578Swollman# Central Time and Southampton Island [in the Central zone] is not 198067578Swollman# required to use daylight savings. 198167578Swollman 198275267Swollman# From 198375267Swollman# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> 198475267Swollman# Nunavut now has two time zones 198575267Swollman# </a> (2000-11-10): 198675267Swollman# The Nunavut government would allow its employees in Kugluktuk and 198775267Swollman# Cambridge Bay to operate on central time year-round, putting them 198875267Swollman# one hour behind the rest of Nunavut for six months during the winter. 198975267Swollman# At the end of October the two communities had rebelled against 199075267Swollman# Nunavut's unified time zone, refusing to shift to eastern time with 199175267Swollman# the rest of the territory for the winter. Cambridge Bay remained on 199275267Swollman# central time, while Kugluktuk, even farther west, reverted to 199375267Swollman# mountain time, which they had used before the advent of Nunavut's 199475267Swollman# unified time zone in 1999. 199575267Swollman# 199675267Swollman# From Rives McDow (2001-01-20), quoting the Nunavut government: 199775267Swollman# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 199875267Swollman 199975267Swollman# From Paul Eggert (2000-12-04): 200075267Swollman# Let's just keep track of the official times for now. 200175267Swollman 200275267Swollman# From Rives McDow (2001-03-07): 200375267Swollman# The premier of Nunavut has issued a ministerial statement advising 200475267Swollman# that effective 2001-04-01, the territory of Nunavut will revert 200575267Swollman# back to three time zones (mountain, central, and eastern). Of the 200675267Swollman# cities in Nunavut, Coral Harbor is the only one that I know of that 200775267Swollman# has said it will not observe dst, staying on EST year round. I'm 200875267Swollman# checking for more info, and will get back to you if I come up with 200975267Swollman# more. 201075267Swollman# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 201175267Swollman 2012149514Swollman# From Gwillim Law (2005-05-21): 2013149514Swollman# According to maps at 2014149514Swollman# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg 2015149514Swollman# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg 2016149514Swollman# (both dated 2003), and 2017149514Swollman# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2018149514Swollman# (from a 1998 Canadian Geographic article), the de facto and de jure time 2019149514Swollman# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2020149514Swollman# round. Using Google, it's easy to find other websites that confirm this. 2021149514Swollman# I wasn't able to find how far back this time regimen goes, but since it 2022149514Swollman# predates the creation of Nunavut, it probably goes back many years.... 2023149514Swollman# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2024149514Swollman# 2025149514Swollman# From Paul Eggert (2005-07-26): 2026149514Swollman# For lack of better information, assume that Southampton Island observed 2027149514Swollman# daylight saving only during wartime. 2028149514Swollman 2029169811Swollman# From Chris Walton (2007-03-01): 2030169811Swollman# ... the community of Resolute (located on Cornwallis Island in 2031169811Swollman# Nunavut) moved from Central Time to Eastern Time last November. 2032169811Swollman# Basically the community did not change its clocks at the end of 2033169811Swollman# daylight saving.... 2034169811Swollman# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2035163302Sru 2036226298Sedwin# From Chris Walton (2011-03-21): 2037226298Sedwin# Back in 2007 I initiated the creation of a new "zone file" for Resolute 2038226298Sedwin# Bay. Resolute Bay is a small community located about 900km north of 2039226298Sedwin# the Arctic Circle. The zone file was required because Resolute Bay had 2040226298Sedwin# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2041169811Swollman# 2042226298Sedwin# According to new information which I received last week, Resolute Bay 2043226298Sedwin# went back to using UTC-6 in the winter of 2007-2008... 2044226298Sedwin# 2045226298Sedwin# On March 11/2007 most of Canada went onto daylight saving. On March 2046226298Sedwin# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2047226298Sedwin# talked to somebody that was both knowledgeable and helpful. I was able 2048226298Sedwin# to confirm that Resolute Bay was still operating on UTC-5. It was 2049226298Sedwin# explained to me that Resolute Bay had been on the Eastern Time zone 2050226298Sedwin# (EST) in the winter, and was now back on the Central Time zone (CDT). 2051226298Sedwin# i.e. the time zone had changed twice in the last year but the clocks 2052226298Sedwin# had not moved. The residents had to know which time zone they were in 2053226298Sedwin# so they could follow the correct TV schedule... 2054226298Sedwin# 2055226298Sedwin# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2056226298Sedwin# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2057226298Sedwin# of the phone call, I decided to seek out an alternate source of 2058226298Sedwin# information. I found an e-mail address for somebody by the name of 2059226298Sedwin# Stephanie Adams whose job was listed as "Inns North Support Officer for 2060226298Sedwin# Arctic Co-operatives." I was under the impression that Stephanie lived 2061226298Sedwin# and worked in Resolute Bay... 2062226298Sedwin# 2063226298Sedwin# On March 14/2011 I phoned the hamlet office again. I was told that 2064226298Sedwin# Resolute Bay had been using Central Standard Time over the winter of 2065226298Sedwin# 2010-2011 and that the clocks had therefore been moved one hour ahead 2066226298Sedwin# on March 13/2011. The person I talked to was aware that Resolute Bay 2067226298Sedwin# had previously experimented with Eastern Standard Time but he could not 2068226298Sedwin# tell me when the practice had stopped. 2069226298Sedwin# 2070226298Sedwin# On March 17/2011 I searched the Web to find an e-mail address of 2071226298Sedwin# somebody that might be able to tell me exactly when Resolute Bay went 2072226298Sedwin# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2073226298Sedwin# used to be the mayor of Resolute Bay and he apparently owns half the 2074226298Sedwin# businesses including "South Camp Inn." This website has some info on 2075226298Sedwin# Aziz: 2076226298Sedwin# <a href="http://www.uphere.ca/node/493"> 2077226298Sedwin# http://www.uphere.ca/node/493 2078226298Sedwin# </a> 2079226298Sedwin# 2080226298Sedwin# I sent Aziz an e-mail asking when Resolute Bay had stopped using 2081226298Sedwin# Eastern Standard Time. 2082226298Sedwin# 2083226298Sedwin# Aziz responded quickly with this: "hi, The time was not changed for the 2084226298Sedwin# 1 year only, the following year, the community went back to the old way 2085226298Sedwin# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2086226298Sedwin# the winter Zulu plus 6 hrs" 2087226298Sedwin# 2088226298Sedwin# This of course conflicted with everything I had ascertained in November 2008. 2089226298Sedwin# 2090226298Sedwin# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2091226298Sedwin# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2092226298Sedwin# may want to check with the weather office in Resolute Bay or do a 2093226298Sedwin# search on the weather through Env. Canada. web site" 2094226298Sedwin# 2095226298Sedwin# If I had realized the Stephanie did not live in Resolute Bay I would 2096226298Sedwin# never have contacted her. I now believe that all the information I 2097226298Sedwin# obtained in November 2008 should be ignored... 2098226298Sedwin# I apologize for reporting incorrect information in 2008. 2099169811Swollman 21002742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 210117200SwollmanRule NT_YK 1918 only - Apr 14 2:00 1:00 D 210217200SwollmanRule NT_YK 1918 only - Oct 27 2:00 0 S 210317200SwollmanRule NT_YK 1919 only - May 25 2:00 1:00 D 210417200SwollmanRule NT_YK 1919 only - Nov 1 0:00 0 S 2105121098SwollmanRule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2106121098SwollmanRule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 210717200SwollmanRule NT_YK 1945 only - Sep 30 2:00 0 S 210817200SwollmanRule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 210917200SwollmanRule NT_YK 1965 only - Oct lastSun 2:00 0 S 211017200SwollmanRule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2111158421SwollmanRule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2112158421SwollmanRule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 21132742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2114169811Swollman# aka Panniqtuuq 2115169811SwollmanZone America/Pangnirtung 0 - zzz 1921 # trading post est. 211658787Sru -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 211758787Sru -5:00 Canada E%sT 1999 Oct 31 2:00 211875267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 211975267Swollman -5:00 Canada E%sT 2120169811Swollman# formerly Frobisher Bay 2121169811SwollmanZone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 212258787Sru -5:00 NT_YK E%sT 1999 Oct 31 2:00 212375267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 212475267Swollman -5:00 Canada E%sT 2125169811Swollman# aka Qausuittuq 2126169811SwollmanZone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 212775267Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 212875267Swollman -5:00 - EST 2001 Apr 1 3:00 2129169811Swollman -6:00 Canada C%sT 2006 Oct 29 2:00 2130226298Sedwin -5:00 - EST 2007 Mar 11 3:00 2131226298Sedwin -6:00 Canada C%sT 2132169811Swollman# aka Kangiqiniq 2133169811SwollmanZone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 2134169811Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 2135169811Swollman -5:00 - EST 2001 Apr 1 3:00 213658787Sru -6:00 Canada C%sT 2137169811Swollman# aka Iqaluktuuttiaq 2138169811SwollmanZone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 213958787Sru -7:00 NT_YK M%sT 1999 Oct 31 2:00 214075267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 214175267Swollman -5:00 - EST 2000 Nov 5 0:00 214275267Swollman -6:00 - CST 2001 Apr 1 3:00 214375267Swollman -7:00 Canada M%sT 2144169811SwollmanZone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 2145158421Swollman -7:00 NT_YK M%sT 1980 2146158421Swollman -7:00 Canada M%sT 2147169811SwollmanZone America/Inuvik 0 - zzz 1953 # Inuvik founded 214817200Swollman -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2149158421Swollman -7:00 NT_YK M%sT 1980 2150158421Swollman -7:00 Canada M%sT 21512742SwollmanZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 215217200Swollman -9:00 NT_YK Y%sT 1966 Jul 1 2:00 2153158421Swollman -8:00 NT_YK P%sT 1980 2154158421Swollman -8:00 Canada P%sT 215517200SwollmanZone America/Dawson -9:17:40 - LMT 1900 Aug 20 215620094Swollman -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2157158421Swollman -8:00 NT_YK P%sT 1980 2158158421Swollman -8:00 Canada P%sT 21592742Swollman 21608029Swollman 21612742Swollman############################################################################### 21622742Swollman 21632742Swollman# Mexico 21642742Swollman 216575267Swollman# From Paul Eggert (2001-03-05): 216675267Swollman# The Investigation and Analysis Service of the 216775267Swollman# Mexican Library of Congress (MLoC) has published a 216875267Swollman# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> 216975267Swollman# history of Mexican local time (in Spanish) 217075267Swollman# </a>. 21712742Swollman# 2172158421Swollman# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 217375267Swollman# (In all cases we go with the MLoC.) 2174158421Swollman# S&P report that Baja was at -8:00 in 1922/1923. 2175158421Swollman# S&P say the 1930 transition in Baja was 1930-11-16. 2176158421Swollman# S&P report no DST during summer 1931. 2177158421Swollman# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 21782742Swollman 217975267Swollman# From Gwillim Law (2001-02-20): 218075267Swollman# There are some other discrepancies between the Decrees page and the 218175267Swollman# tz database. I think they can best be explained by supposing that 218275267Swollman# the researchers who prepared the Decrees page failed to find some of 218375267Swollman# the relevant documents. 218475267Swollman 2185149514Swollman# From Alan Perry (1996-02-15): 218617200Swollman# A guy from our Mexico subsidiary finally found the Presidential Decree 218717200Swollman# outlining the timezone changes in Mexico. 218858787Sru# 218917200Swollman# ------------- Begin Forwarded Message ------------- 219058787Sru# 219117200Swollman# I finally got my hands on the Official Presidential Decree that sets up the 219217200Swollman# rules for the DST changes. The rules are: 219358787Sru# 219417200Swollman# 1. The country is divided in 3 timezones: 219517200Swollman# - Baja California Norte (the Mexico/BajaNorte TZ) 219617200Swollman# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 219717200Swollman# - The rest of the country (the Mexico/General TZ) 219858787Sru# 219917200Swollman# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 220017200Swollman# at 2:00 AM, the times in each zone are as follows: 220117200Swollman# BajaNorte: GMT+7 220217200Swollman# BajaSur: GMT+6 220317200Swollman# General: GMT+5 220458787Sru# 220517200Swollman# 3. The rest of the year, the times are as follows: 220617200Swollman# BajaNorte: GMT+8 220717200Swollman# BajaSur: GMT+7 220817200Swollman# General: GMT+6 220958787Sru# 221017200Swollman# The Decree was published in Mexico's Official Newspaper on January 4th. 221158787Sru# 221217200Swollman# -------------- End Forwarded Message -------------- 221317200Swollman# From Paul Eggert (1996-06-12): 221443014Swollman# For an English translation of the decree, see 221543014Swollman# <a href="http://mexico-travel.com/extra/timezone_eng.html"> 2216257682Sedwin# "Diario Oficial: Time Zone Changeover" (1996-01-04). 221743014Swollman# </a> 221814343Swollman 221943543Swollman# From Rives McDow (1998-10-08): 222043543Swollman# The State of Quintana Roo has reverted back to central STD and DST times 222143543Swollman# (i.e. UTC -0600 and -0500 as of 1998-08-02). 222243543Swollman 222358787Sru# From Rives McDow (2000-01-10): 222458787Sru# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 222558787Sru# zone 5 hours from the International Date Line, and will not observe daylight 222658787Sru# savings time so as to stay on the same time zone as the southern part of 222758787Sru# Arizona year round. 222858787Sru 222975267Swollman# From Jesper Norgaard, translating 223075267Swollman# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 223175267Swollman# In Oaxaca, the 55.000 teachers from the Section 22 of the National 223275267Swollman# Syndicate of Education Workers, refuse to apply daylight saving each 223375267Swollman# year, so that the more than 10,000 schools work at normal hour the 223475267Swollman# whole year. 223575267Swollman 223675267Swollman# From Gwillim Law (2001-01-19): 223775267Swollman# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 223875267Swollman# (translated):... 223975267Swollman# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 224075267Swollman# that Summer Time will be reduced from seven to five months, starting 224175267Swollman# this year.... 224275267Swollman# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 224375267Swollman# [translated], says "summer time will ... take effect on the first Sunday 224475267Swollman# in May, and end on the last Sunday of September. 224575267Swollman 224675267Swollman# From Arthur David Olson (2001-01-25): 224775267Swollman# The 2001-01-24 traditional Washington Post contained the page one 224875267Swollman# story "Timely Issue Divides Mexicans."... 224975267Swollman# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 225075267Swollman# ... Mexico City Mayor Lopez Obrador "...is threatening to keep 225175267Swollman# Mexico City and its 20 million residents on a different time than 225275267Swollman# the rest of the country..." In particular, Lopez Obrador would abolish 225375267Swollman# observation of Daylight Saving Time. 225475267Swollman 225575267Swollman# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> 225675267Swollman# Official statute published by the Energy Department 225775267Swollman# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 225875267Swollman# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). 225975267Swollman 226075267Swollman# From Paul Eggert (2001-03-03): 226175267Swollman# 226275267Swollman# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> 226375267Swollman# James F. Smith writes in today's LA Times 226475267Swollman# </a> 226575267Swollman# * Sonora will continue to observe standard time. 226675267Swollman# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that 226775267Swollman# the Federal District will not adopt DST. 226875267Swollman# * 4 of 16 district leaders announced they'll ignore the decree. 226975267Swollman# * The decree does not affect federal-controlled facilities including 227075267Swollman# the airport, banks, hospitals, and schools. 227175267Swollman# 227275267Swollman# For now we'll assume that the Federal District will bow to federal rules. 227375267Swollman 227475267Swollman# From Jesper Norgaard (2001-04-01): 227575267Swollman# I found some references to the Mexican application of daylight 227675267Swollman# saving, which modifies what I had already sent you, stating earlier 227775267Swollman# that a number of northern Mexican states would go on daylight 227875267Swollman# saving. The modification reverts this to only cover Baja California 227975267Swollman# (Norte), while all other states (except Sonora, who has no daylight 228075267Swollman# saving all year) will follow the original decree of president 228175267Swollman# Vicente Fox, starting daylight saving May 6, 2001 and ending 228275267Swollman# September 30, 2001. 228375267Swollman# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> 228475267Swollman# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 228575267Swollman 228686222Swollman# From Reuters (2001-09-04): 228786222Swollman# Mexico's Supreme Court on Tuesday declared that daylight savings was 228886222Swollman# unconstitutional in Mexico City, creating the possibility the 228986222Swollman# capital will be in a different time zone from the rest of the nation 229086222Swollman# next year.... The Supreme Court's ruling takes effect at 2:00 229186222Swollman# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 229286222Swollman# standard time. "This is so residents of the Federal District are not 229386222Swollman# subject to unexpected time changes," a statement from the court said. 229486222Swollman 229593799Swollman# From Jesper Norgaard Welen (2002-03-12): 229693799Swollman# ... consulting my local grocery store(!) and my coworkers, they all insisted 229793799Swollman# that a new decision had been made to reinstate US style DST in Mexico.... 229893799Swollman# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 229993799Swollman# confirms this. Sonora as usual is the only state where DST is not applied. 230093799Swollman 2301203019Sedwin# From Steffen Thorsen (2009-12-28): 2302203019Sedwin# 2303203019Sedwin# Steffen Thorsen wrote: 2304203019Sedwin# > Mexico's House of Representatives has approved a proposal for northern 2305203019Sedwin# > Mexico's border cities to share the same daylight saving schedule as 2306203019Sedwin# > the United States. 2307203019Sedwin# Now this has passed both the Congress and the Senate, so starting from 2308203019Sedwin# 2010, some border regions will be the same: 2309203019Sedwin# <a href="http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/"> 2310203019Sedwin# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2311203019Sedwin# </a> 2312203019Sedwin# <a href="http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939"> 2313203019Sedwin# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2314203019Sedwin# </a> 2315203019Sedwin# (Spanish) 2316203019Sedwin# 2317203019Sedwin# Could not find the new law text, but the proposed law text changes are here: 2318203019Sedwin# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf"> 2319203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2320203019Sedwin# </a> 2321203019Sedwin# (Gaceta Parlamentaria) 2322203019Sedwin# 2323203019Sedwin# There is also a list of the votes here: 2324203019Sedwin# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html"> 2325203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2326203019Sedwin# </a> 2327203019Sedwin# 2328203019Sedwin# Our page: 2329203019Sedwin# <a href="http://www.timeanddate.com/news/time/north-mexico-dst-change.html"> 2330203019Sedwin# http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2331203019Sedwin# </a> 2332203019Sedwin 2333203019Sedwin# From Arthur David Olson (2010-01-20): 2334203019Sedwin# The page 2335203019Sedwin# <a href="http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010"> 2336203019Sedwin# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2337203019Sedwin# </a> 2338203019Sedwin# includes this text: 2339203019Sedwin# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2340203019Sedwin# Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2341203019Sedwin# Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2342203019Sedwin# Tamaulipas, la aplicación de este horario estacional surtirá efecto 2343203019Sedwin# desde las dos horas del segundo domingo de marzo y concluirá a las dos 2344203019Sedwin# horas del primer domingo de noviembre. 2345203019Sedwin# En los municipios fronterizos que se encuentren ubicados en la franja 2346203019Sedwin# fronteriza norte en el territorio comprendido entre la línea 2347203019Sedwin# internacional y la línea paralela ubicada a una distancia de veinte 2348203019Sedwin# kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2349203019Sedwin# interior del país, la aplicación de este horario estacional surtirá 2350203019Sedwin# efecto desde las dos horas del segundo domingo de marzo y concluirá a 2351203019Sedwin# las dos horas del primer domingo de noviembre. 2352203019Sedwin 23532742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 23542742SwollmanRule Mexico 1939 only - Feb 5 0:00 1:00 D 23552742SwollmanRule Mexico 1939 only - Jun 25 0:00 0 S 23562742SwollmanRule Mexico 1940 only - Dec 9 0:00 1:00 D 23572742SwollmanRule Mexico 1941 only - Apr 1 0:00 0 S 2358121098SwollmanRule Mexico 1943 only - Dec 16 0:00 1:00 W # War 23592742SwollmanRule Mexico 1944 only - May 1 0:00 0 S 23602742SwollmanRule Mexico 1950 only - Feb 12 0:00 1:00 D 23612742SwollmanRule Mexico 1950 only - Jul 30 0:00 0 S 236275267SwollmanRule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 236375267SwollmanRule Mexico 1996 2000 - Oct lastSun 2:00 0 S 236493799SwollmanRule Mexico 2001 only - May Sun>=1 2:00 1:00 D 236593799SwollmanRule Mexico 2001 only - Sep lastSun 2:00 0 S 236693799SwollmanRule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 236793799SwollmanRule Mexico 2002 max - Oct lastSun 2:00 0 S 23682742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 236943014Swollman# Quintana Roo 237058787SruZone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 237175267Swollman -6:00 - CST 1981 Dec 23 237243543Swollman -5:00 Mexico E%sT 1998 Aug 2 2:00 237343543Swollman -6:00 Mexico C%sT 237464499Swollman# Campeche, Yucatan 237564499SwollmanZone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 237675267Swollman -6:00 - CST 1981 Dec 23 237764499Swollman -5:00 - EST 1982 Dec 2 237864499Swollman -6:00 Mexico C%sT 2379203019Sedwin# Coahuila, Durango, Nuevo Leon, Tamaulipas (near US border) 2380203019SedwinZone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2381203019Sedwin -6:00 - CST 1988 2382203019Sedwin -6:00 US C%sT 1989 2383203019Sedwin -6:00 Mexico C%sT 2010 2384203019Sedwin -6:00 US C%sT 2385203019Sedwin# Coahuila, Durango, Nuevo Leon, Tamaulipas (away from US border) 238675267SwollmanZone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 238764499Swollman -6:00 - CST 1988 238864499Swollman -6:00 US C%sT 1989 238964499Swollman -6:00 Mexico C%sT 239043014Swollman# Central Mexico 2391203019SedwinZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 23922742Swollman -7:00 - MST 1927 Jun 10 23:00 23932742Swollman -6:00 - CST 1930 Nov 15 23942742Swollman -7:00 - MST 1931 May 1 23:00 23952742Swollman -6:00 - CST 1931 Oct 239675267Swollman -7:00 - MST 1932 Apr 1 239786222Swollman -6:00 Mexico C%sT 2001 Sep 30 02:00 239893799Swollman -6:00 - CST 2002 Feb 20 239993799Swollman -6:00 Mexico C%sT 2400203019Sedwin# Chihuahua (near US border) 2401203019SedwinZone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2402203019Sedwin -7:00 - MST 1927 Jun 10 23:00 2403203019Sedwin -6:00 - CST 1930 Nov 15 2404203019Sedwin -7:00 - MST 1931 May 1 23:00 2405203019Sedwin -6:00 - CST 1931 Oct 2406203019Sedwin -7:00 - MST 1932 Apr 1 2407203019Sedwin -6:00 - CST 1996 2408203019Sedwin -6:00 Mexico C%sT 1998 2409203019Sedwin -6:00 - CST 1998 Apr Sun>=1 3:00 2410203019Sedwin -7:00 Mexico M%sT 2010 2411203019Sedwin -7:00 US M%sT 2412203019Sedwin# Chihuahua (away from US border) 241358787SruZone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 241443014Swollman -7:00 - MST 1927 Jun 10 23:00 241543014Swollman -6:00 - CST 1930 Nov 15 241643014Swollman -7:00 - MST 1931 May 1 23:00 241743014Swollman -6:00 - CST 1931 Oct 241875267Swollman -7:00 - MST 1932 Apr 1 241943014Swollman -6:00 - CST 1996 242043014Swollman -6:00 Mexico C%sT 1998 242143014Swollman -6:00 - CST 1998 Apr Sun>=1 3:00 242243014Swollman -7:00 Mexico M%sT 242358787Sru# Sonora 242458787SruZone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 242558787Sru -7:00 - MST 1927 Jun 10 23:00 242658787Sru -6:00 - CST 1930 Nov 15 242758787Sru -7:00 - MST 1931 May 1 23:00 242858787Sru -6:00 - CST 1931 Oct 242975267Swollman -7:00 - MST 1932 Apr 1 243064499Swollman -6:00 - CST 1942 Apr 24 243158787Sru -7:00 - MST 1949 Jan 14 243258787Sru -8:00 - PST 1970 243358787Sru -7:00 Mexico M%sT 1999 243458787Sru -7:00 - MST 2435207898Sedwin 2436207898Sedwin# From Alexander Krivenyshev (2010-04-21): 2437207898Sedwin# According to news, Bahía de Banderas (Mexican state of Nayarit) 2438207898Sedwin# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2439207898Sedwin# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2440207898Sedwin# 2441207898Sedwin# (Spanish) 2442207898Sedwin# Bahía de Banderas homologa su horario al del centro del 2443207898Sedwin# país, a partir de este domingo 2444207898Sedwin# <a href="http://www.nayarit.gob.mx/notes.asp?id=20748"> 2445207898Sedwin# http://www.nayarit.gob.mx/notes.asp?id=20748 2446207898Sedwin# </a> 2447207898Sedwin# 2448207898Sedwin# Bahía de Banderas homologa su horario con el del Centro del 2449207898Sedwin# País 2450207898Sedwin# <a href="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"> 2451207898Sedwin# 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" 2452207898Sedwin# </a> 2453207898Sedwin# 2454207898Sedwin# (English) 2455207898Sedwin# Puerto Vallarta and Bahía de Banderas: One Time Zone 2456207898Sedwin# <a href="http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml"> 2457207898Sedwin# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2458207898Sedwin# </a> 2459207898Sedwin# 2460207898Sedwin# or 2461207898Sedwin# <a href="http://www.worldtimezone.com/dst_news/dst_news_mexico08.html"> 2462207898Sedwin# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2463207898Sedwin# </a> 2464207898Sedwin# 2465207898Sedwin# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2466207898Sedwin# will allow Bahía de Banderas and Puerto Vallarta to share the same time 2467207898Sedwin# zone ..." 246864499Swollman# Baja California Sur, Nayarit, Sinaloa 2469207898Sedwin 2470207898Sedwin# From Arthur David Olson (2010-05-01): 2471207898Sedwin# Use "Bahia_Banderas" to keep the name to fourteen characters. 2472207898Sedwin 24732742SwollmanZone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 24742742Swollman -7:00 - MST 1927 Jun 10 23:00 24752742Swollman -6:00 - CST 1930 Nov 15 24762742Swollman -7:00 - MST 1931 May 1 23:00 24772742Swollman -6:00 - CST 1931 Oct 247875267Swollman -7:00 - MST 1932 Apr 1 247964499Swollman -6:00 - CST 1942 Apr 24 24802742Swollman -7:00 - MST 1949 Jan 14 24812742Swollman -8:00 - PST 1970 248214343Swollman -7:00 Mexico M%sT 2483207898Sedwin 2484207898SedwinZone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2485207898Sedwin -7:00 - MST 1927 Jun 10 23:00 2486207898Sedwin -6:00 - CST 1930 Nov 15 2487207898Sedwin -7:00 - MST 1931 May 1 23:00 2488207898Sedwin -6:00 - CST 1931 Oct 2489207898Sedwin -7:00 - MST 1932 Apr 1 2490207898Sedwin -6:00 - CST 1942 Apr 24 2491207898Sedwin -7:00 - MST 1949 Jan 14 2492207898Sedwin -8:00 - PST 1970 2493210718Sedwin -7:00 Mexico M%sT 2010 Apr 4 2:00 2494207898Sedwin -6:00 Mexico C%sT 2495207898Sedwin 2496203019Sedwin# Baja California (near US border) 24972742SwollmanZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 249875267Swollman -7:00 - MST 1924 24992742Swollman -8:00 - PST 1927 Jun 10 23:00 250075267Swollman -7:00 - MST 1930 Nov 15 250175267Swollman -8:00 - PST 1931 Apr 1 250275267Swollman -8:00 1:00 PDT 1931 Sep 30 250364499Swollman -8:00 - PST 1942 Apr 24 2504158421Swollman -8:00 1:00 PWT 1945 Aug 14 23:00u 2505158421Swollman -8:00 1:00 PPT 1945 Nov 12 # Peace 250675267Swollman -8:00 - PST 1948 Apr 5 250775267Swollman -8:00 1:00 PDT 1949 Jan 14 250875267Swollman -8:00 - PST 1954 250975267Swollman -8:00 CA P%sT 1961 251075267Swollman -8:00 - PST 1976 251114343Swollman -8:00 US P%sT 1996 251275267Swollman -8:00 Mexico P%sT 2001 251393799Swollman -8:00 US P%sT 2002 Feb 20 2514203019Sedwin -8:00 Mexico P%sT 2010 2515203019Sedwin -8:00 US P%sT 2516203019Sedwin# Baja California (away from US border) 2517203019SedwinZone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2518203019Sedwin -7:00 - MST 1924 2519203019Sedwin -8:00 - PST 1927 Jun 10 23:00 2520203019Sedwin -7:00 - MST 1930 Nov 15 2521203019Sedwin -8:00 - PST 1931 Apr 1 2522203019Sedwin -8:00 1:00 PDT 1931 Sep 30 2523203019Sedwin -8:00 - PST 1942 Apr 24 2524203019Sedwin -8:00 1:00 PWT 1945 Aug 14 23:00u 2525203019Sedwin -8:00 1:00 PPT 1945 Nov 12 # Peace 2526203019Sedwin -8:00 - PST 1948 Apr 5 2527203019Sedwin -8:00 1:00 PDT 1949 Jan 14 2528203019Sedwin -8:00 - PST 1954 2529203019Sedwin -8:00 CA P%sT 1961 2530203019Sedwin -8:00 - PST 1976 2531203019Sedwin -8:00 US P%sT 1996 2532203019Sedwin -8:00 Mexico P%sT 2001 2533203019Sedwin -8:00 US P%sT 2002 Feb 20 253493799Swollman -8:00 Mexico P%sT 2535158421Swollman# From Paul Eggert (2006-03-22): 253675267Swollman# Formerly there was an America/Ensenada zone, which differed from 253775267Swollman# America/Tijuana only in that it did not observe DST from 1976 2538158421Swollman# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2539158421Swollman# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 254075267Swollman# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and 2541158421Swollman# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 254275267Swollman# DST-observance was a town-by-town matter back then. This concerns 254375267Swollman# data after 1970 so most likely there should be at least one Zone 254475267Swollman# other than America/Tijuana for Baja, but it's not clear yet what its 254575267Swollman# name or contents should be. 25462742Swollman# 25472742Swollman# Revillagigedo Is 25482742Swollman# no information 25492742Swollman 25502742Swollman############################################################################### 25512742Swollman 25522742Swollman# Anguilla 2553257682Sedwin# See 'southamerica'. 25542742Swollman 25552742Swollman# Antigua and Barbuda 25562742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25572742SwollmanZone America/Antigua -4:07:12 - LMT 1912 Mar 2 25582742Swollman -5:00 - EST 1951 25592742Swollman -4:00 - AST 25602742Swollman 25612742Swollman# Bahamas 2562169811Swollman# 2563248310Sedwin# For 1899 Milne gives -5:09:29.5; round that. 2564248310Sedwin# 2565169811Swollman# From Sue Williams (2006-12-07): 2566169811Swollman# The Bahamas announced about a month ago that they plan to change their DST 2567169811Swollman# rules to sync with the U.S. starting in 2007.... 2568169811Swollman# http://www.jonesbahamas.com/?c=45&a=10412 2569169811Swollman 25702742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2571181421SedwinRule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2572181421SedwinRule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 25732742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2574248310SedwinZone America/Nassau -5:09:30 - LMT 1912 Mar 2 2575169811Swollman -5:00 Bahamas E%sT 1976 2576169811Swollman -5:00 US E%sT 25772742Swollman 25782742Swollman# Barbados 2579248310Sedwin 2580248310Sedwin# For 1899 Milne gives -3:58:29.2; round that. 2581248310Sedwin 25822742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 25832742SwollmanRule Barb 1977 only - Jun 12 2:00 1:00 D 25842742SwollmanRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 25852742SwollmanRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 25862742SwollmanRule Barb 1979 only - Sep 30 2:00 0 S 25872742SwollmanRule Barb 1980 only - Sep 25 2:00 0 S 25882742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2589248310SedwinZone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2590248310Sedwin -3:58:29 - BMT 1932 # Bridgetown Mean Time 25912742Swollman -4:00 Barb A%sT 25922742Swollman 25932742Swollman# Belize 2594158421Swollman# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 25952742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 25962742SwollmanRule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 25972742SwollmanRule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 25982742SwollmanRule Belize 1973 only - Dec 5 0:00 1:00 D 25992742SwollmanRule Belize 1974 only - Feb 9 0:00 0 S 26002742SwollmanRule Belize 1982 only - Dec 18 0:00 1:00 D 26012742SwollmanRule Belize 1983 only - Feb 12 0:00 0 S 26022742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 26032742SwollmanZone America/Belize -5:52:48 - LMT 1912 Apr 26042742Swollman -6:00 Belize C%sT 26052742Swollman 26062742Swollman# Bermuda 2607163302Sru 2608248310Sedwin# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2609248310Sedwin# Bermuda dockyard, Ireland I; round that. 2610248310Sedwin 2611163302Sru# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2612163302Sru 2613163302Sru# Next year, however, clocks in the US will go forward on the second Sunday 2614163302Sru# in March, until the first Sunday in November. And, after the Time Zone 2615163302Sru# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2616163302Sru# Friday, the same thing will happen in Bermuda. 2617163302Sru# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2618163302Sru 26192742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2620248310SedwinZone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 26212742Swollman -4:00 - AST 1974 Apr 28 2:00 2622257682Sedwin -4:00 Canada A%sT 1976 2623163302Sru -4:00 US A%sT 26242742Swollman 26252742Swollman# Cayman Is 26262742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 26272742SwollmanZone America/Cayman -5:25:32 - LMT 1890 # Georgetown 2628257682Sedwin -5:07:11 - KMT 1912 Feb # Kingston Mean Time 26292742Swollman -5:00 - EST 26302742Swollman 26312742Swollman# Costa Rica 2632248310Sedwin 2633248310Sedwin# Milne gives -5:36:13.3 as San Jose mean time; round to nearest. 2634248310Sedwin 26352742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 26362742SwollmanRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 26372742SwollmanRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 263820094SwollmanRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2639158421Swollman# IATA SSIM (1991-09) says the following was at 1:00; 2640158421Swollman# go with Shanks & Pottenger. 264120094SwollmanRule CR 1991 only - Jul 1 0:00 0 S 264220094SwollmanRule CR 1992 only - Mar 15 0:00 0 S 2643257682Sedwin# There are too many San Joses elsewhere, so we'll use 'Costa Rica'. 26442742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2645248310SedwinZone America/Costa_Rica -5:36:13 - LMT 1890 # San Jose 2646248310Sedwin -5:36:13 - SJMT 1921 Jan 15 # San Jose Mean Time 26472742Swollman -6:00 CR C%sT 26482742Swollman# Coco 26492742Swollman# no information; probably like America/Costa_Rica 26502742Swollman 26512742Swollman# Cuba 26522742Swollman 2653248310Sedwin# From Paul Eggert (2013-02-21): 2654248310Sedwin# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2655248310Sedwin# for the port, and -5:30 for meteorological observations. 2656248310Sedwin# For now, stick with Shanks & Pottenger. 2657248310Sedwin 265858787Sru# From Arthur David Olson (1999-03-29): 265958787Sru# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 266058787Sru# the Cuban National Team and the Baltimore Orioles was carried live on 266158787Sru# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 266258787Sru# During the game, play-by-play announcer Jim Hunter noted that 266358787Sru# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 266458787Sru# Time today." (The "two hour" remark referred to losing one hour of 266558787Sru# sleep on 1999-03-28--when the announcers were in Cuba as it switched 266658787Sru# to DST--and one more hour on 1999-04-04--when the announcers will have 266758787Sru# returned to Baltimore, which switches on that date.) 26682742Swollman 2669259630Sedwin# From Steffen Thorsen (2013-11-11): 2670259630Sedwin# DST start in Cuba in 2004 ... does not follow the same rules as the 2671259630Sedwin# years before. The correct date should be Sunday 2004-03-28 00:00 ... 2672259630Sedwin# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 2673259630Sedwin 2674138323Swollman# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2675138323Swollman# Cuba is not going back to standard time this year. 2676158421Swollman# From Paul Eggert (2006-03-22): 2677138323Swollman# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2678138323Swollman# says that it's due to a problem at the Antonio Guiteras 2679138323Swollman# thermoelectric plant, and says "This October there will be no return 2680138323Swollman# to normal hours (after daylight saving time)". 2681158421Swollman# For now, let's assume that it's a temporary measure. 2682138323Swollman 2683153670Swollman# From Carlos A. Carnero Delgado (2005-11-12): 2684153670Swollman# This year (just like in 2004-2005) there's no change in time zone 2685153670Swollman# adjustment in Cuba. We will stay in daylight saving time: 2686153670Swollman# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2687153670Swollman 2688169811Swollman# From Jesper Norgaard Welen (2006-10-21): 2689169811Swollman# An article in GRANMA INTERNACIONAL claims that Cuba will end 2690169811Swollman# the 3 years of permanent DST next weekend, see 2691169811Swollman# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2692169811Swollman# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2693169811Swollman# watches should be set back one hour -- going back to 00:00 hours -- returning 2694169811Swollman# to the normal schedule.... 2695163302Sru 2696169811Swollman# From Paul Eggert (2007-03-02): 2697169811Swollman# http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday, 2698169811Swollman# says Cuban clocks will advance at midnight on March 10. 2699169811Swollman# For lack of better information, assume Cuba will use US rules, 2700169811Swollman# except that it switches at midnight standard time as usual. 2701173319Sedwin# 2702173319Sedwin# From Steffen Thorsen (2007-10-25): 2703240461Sedwin# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2704173319Sedwin# earlier - on the last Sunday of October, just like in 2006. 2705240461Sedwin# 2706173319Sedwin# He supplied these references: 2707240461Sedwin# 2708173319Sedwin# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2709173319Sedwin# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2710240461Sedwin# 2711173319Sedwin# From Alex Kryvenishev (2007-10-25): 2712173319Sedwin# Here is also article from Granma (Cuba): 2713240461Sedwin# 2714173319Sedwin# [Regira] el Horario Normal desde el [proximo] domingo 28 de octubre 2715173319Sedwin# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2716240461Sedwin# 2717173319Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2718169811Swollman 2719177591Sedwin# From Arthur David Olson (2008-03-09): 2720177591Sedwin# I'm in Maryland which is now observing United States Eastern Daylight 2721177591Sedwin# Time. At 9:44 local time I used RealPlayer to listen to 2722177591Sedwin# <a href="http://media.enet.cu/radioreloj"> 2723177591Sedwin# http://media.enet.cu/radioreloj 2724177591Sedwin# </a>, a Cuban information station, and heard 2725177591Sedwin# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2726177591Sedwin# indicating that Cuba is still on standard time. 2727177591Sedwin 2728177591Sedwin# From Steffen Thorsen (2008-03-12): 2729177591Sedwin# It seems that Cuba will start DST on Sunday, 2007-03-16... 2730177591Sedwin# It was announced yesterday, according to this source (in Spanish): 2731177591Sedwin# <a href="http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm"> 2732177591Sedwin# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2733177591Sedwin# </a> 2734177591Sedwin# 2735177591Sedwin# Some more background information is posted here: 2736177591Sedwin# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html"> 2737177591Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2738177591Sedwin# </a> 2739177591Sedwin# 2740177591Sedwin# The article also says that Cuba has been observing DST since 1963, 2741177591Sedwin# while Shanks (and tzdata) has 1965 as the first date (except in the 2742177591Sedwin# 1940's). Many other web pages in Cuba also claim that it has been 2743177591Sedwin# observed since 1963, but with the exception of 1970 - an exception 2744177591Sedwin# which is not present in tzdata/Shanks. So there is a chance we need to 2745177591Sedwin# change some historic records as well. 2746177591Sedwin# 2747177591Sedwin# One example: 2748177591Sedwin# <a href="http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm"> 2749177591Sedwin# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2750177591Sedwin# </a> 2751177591Sedwin 2752177591Sedwin# From Jesper Norgaard Welen (2008-03-13): 2753177591Sedwin# The Cuban time change has just been confirmed on the most authoritative 2754177591Sedwin# web site, the Granma. Please check out 2755177591Sedwin# <a href="http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html"> 2756177591Sedwin# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2757177591Sedwin# </a> 2758177591Sedwin# 2759177591Sedwin# Basically as expected after Steffen Thorsens information, the change 2760177591Sedwin# will take place midnight between Saturday and Sunday. 2761177591Sedwin 2762177591Sedwin# From Arthur David Olson (2008-03-12): 2763177591Sedwin# Assume Sun>=15 (third Sunday) going forward. 2764177591Sedwin 2765189923Sedwin# From Alexander Krivenyshev (2009-03-04) 2766189923Sedwin# According to the Radio Reloj - Cuba will start Daylight Saving Time on 2767189923Sedwin# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2768189923Sedwin# not on midnight March 14 / March 15 as previously thought. 2769189923Sedwin# 2770189923Sedwin# <a href="http://www.worldtimezone.com/dst_news/dst_news_cuba05.html"> 2771189923Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2772189923Sedwin# (in Spanish) 2773189923Sedwin# </a> 2774189923Sedwin 2775189923Sedwin# From Arthur David Olson (2009-03-09) 2776189923Sedwin# I listened over the Internet to 2777189923Sedwin# <a href="http://media.enet.cu/readioreloj"> 2778189923Sedwin# http://media.enet.cu/readioreloj 2779189923Sedwin# </a> 2780189923Sedwin# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2781189923Sedwin# the time was announced as "diez cinco"--the same time as here, indicating 2782189923Sedwin# that has indeed switched to DST. Assume second Sunday from 2009 forward. 2783189923Sedwin 2784219687Sedwin# From Steffen Thorsen (2011-03-08): 2785219687Sedwin# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2786219687Sedwin# this year. Nothing about the end date known so far (if that has 2787219687Sedwin# changed at all). 2788219687Sedwin# 2789219687Sedwin# Source: 2790219687Sedwin# <a href="http://granma.co.cu/2011/03/08/nacional/artic01.html"> 2791219687Sedwin# http://granma.co.cu/2011/03/08/nacional/artic01.html 2792219687Sedwin# </a> 2793219687Sedwin# 2794219687Sedwin# Our info: 2795219687Sedwin# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html"> 2796219687Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2797219687Sedwin# </a> 2798233446Sedwin# 2799233446Sedwin# From Steffen Thorsen (2011-10-30) 2800240461Sedwin# Cuba will end DST two weeks later this year. Instead of going back 2801233446Sedwin# tonight, it has been delayed to 2011-11-13 at 01:00. 2802233446Sedwin# 2803233446Sedwin# One source (Spanish) 2804233446Sedwin# <a href="http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html"> 2805233446Sedwin# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2806233446Sedwin# </a> 2807233446Sedwin# 2808233446Sedwin# Our page: 2809233446Sedwin# <a href="http://www.timeanddate.com/news/time/cuba-time-changes-2011.html"> 2810233446Sedwin# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2811233446Sedwin# </a> 2812240461Sedwin# 2813240461Sedwin# From Steffen Thorsen (2012-03-01) 2814240461Sedwin# According to Radio Reloj, Cuba will start DST on Midnight between March 2815240461Sedwin# 31 and April 1. 2816240461Sedwin# 2817240461Sedwin# Radio Reloj has the following info (Spanish): 2818240461Sedwin# <a href="http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril"> 2819240461Sedwin# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2820240461Sedwin# </a> 2821240461Sedwin# 2822240461Sedwin# Our info on it: 2823240461Sedwin# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html"> 2824240461Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2825240461Sedwin# </a> 2826219687Sedwin 2827242932Sedwin# From Steffen Thorsen (2012-11-03): 2828242932Sedwin# Radio Reloj and many other sources report that Cuba is changing back 2829242932Sedwin# to standard time on 2012-11-04: 2830242932Sedwin# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2831242932Sedwin# From Paul Eggert (2012-11-03): 2832242932Sedwin# For now, assume the future rule is first Sunday in November. 2833242932Sedwin 28342742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 28352742SwollmanRule Cuba 1928 only - Jun 10 0:00 1:00 D 28362742SwollmanRule Cuba 1928 only - Oct 10 0:00 0 S 28372742SwollmanRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 28382742SwollmanRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 28392742SwollmanRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 28402742SwollmanRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 28412742SwollmanRule Cuba 1965 only - Jun 1 0:00 1:00 D 28422742SwollmanRule Cuba 1965 only - Sep 30 0:00 0 S 28432742SwollmanRule Cuba 1966 only - May 29 0:00 1:00 D 28442742SwollmanRule Cuba 1966 only - Oct 2 0:00 0 S 28452742SwollmanRule Cuba 1967 only - Apr 8 0:00 1:00 D 28462742SwollmanRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 28472742SwollmanRule Cuba 1968 only - Apr 14 0:00 1:00 D 28482742SwollmanRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 28492742SwollmanRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 28502742SwollmanRule Cuba 1972 1974 - Oct 8 0:00 0 S 28512742SwollmanRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 28522742SwollmanRule Cuba 1978 only - May 7 0:00 1:00 D 285330711SwollmanRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 28542742SwollmanRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 28552742SwollmanRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 28562742SwollmanRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 285743014SwollmanRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 285820094SwollmanRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 285943014SwollmanRule Cuba 1996 only - Oct 6 0:00s 0 S 286043014SwollmanRule Cuba 1997 only - Oct 12 0:00s 0 S 286158787SruRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2862138323SwollmanRule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2863259630SedwinRule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 2864259630SedwinRule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 2865233446SedwinRule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 2866177591SedwinRule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2867189923SedwinRule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2868219687SedwinRule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 2869219687SedwinRule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 2870233446SedwinRule Cuba 2011 only - Nov 13 0:00s 0 S 2871240461SedwinRule Cuba 2012 only - Apr 1 0:00s 1:00 D 2872242932SedwinRule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 2873240461SedwinRule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 28742742Swollman 28752742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28762742SwollmanZone America/Havana -5:29:28 - LMT 1890 287758787Sru -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 28782742Swollman -5:00 Cuba C%sT 28792742Swollman 28802742Swollman# Dominica 2881257682Sedwin# See 'southamerica'. 28822742Swollman 28832742Swollman# Dominican Republic 288475267Swollman 288575267Swollman# From Steffen Thorsen (2000-10-30): 288675267Swollman# Enrique Morales reported to me that the Dominican Republic has changed the 288775267Swollman# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 288875267Swollman# http://www.listin.com.do/antes/261000/republica/princi.html 288975267Swollman 289075267Swollman# From Paul Eggert (2000-12-04): 289175267Swollman# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 289275267Swollman 289375267Swollman# From Rives McDow (2000-12-01): 289475267Swollman# Dominican Republic changed its mind and presidential decree on Tuesday, 289575267Swollman# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 289675267Swollman# Dominican Republic will be reverting to 8 hours from the International Date 289775267Swollman# Line, and will not be using DST in the foreseeable future. The reason they 289875267Swollman# decided to use DST was to be in synch with Puerto Rico, who was also going 289975267Swollman# to implement DST. When Puerto Rico didn't implement DST, the president 290075267Swollman# decided to revert. 290175267Swollman 290275267Swollman 29032742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 29042742SwollmanRule DR 1966 only - Oct 30 0:00 1:00 D 29052742SwollmanRule DR 1967 only - Feb 28 0:00 0 S 29062742SwollmanRule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 29072742SwollmanRule DR 1970 only - Feb 21 0:00 0 S 29082742SwollmanRule DR 1971 only - Jan 20 0:00 0 S 29092742SwollmanRule DR 1972 1974 - Jan 21 0:00 0 S 29102742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29112742SwollmanZone America/Santo_Domingo -4:39:36 - LMT 1890 29122742Swollman -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 29132742Swollman -5:00 DR E%sT 1974 Oct 27 291475267Swollman -4:00 - AST 2000 Oct 29 02:00 291575267Swollman -5:00 US E%sT 2000 Dec 3 01:00 29162742Swollman -4:00 - AST 29172742Swollman 29182742Swollman# El Salvador 2919158421Swollman 29202742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 29212742SwollmanRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 29222742SwollmanRule Salv 1987 1988 - Sep lastSun 0:00 0 S 2923121098Swollman# There are too many San Salvadors elsewhere, so use America/El_Salvador 2924121098Swollman# instead of America/San_Salvador. 29252742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29262742SwollmanZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 29272742Swollman -6:00 Salv C%sT 29282742Swollman 29292742Swollman# Grenada 29302742Swollman# Guadeloupe 2931174242Sedwin# St Barthelemy 2932174242Sedwin# St Martin (French part) 2933257682Sedwin# See 'southamerica'. 29342742Swollman 29352742Swollman# Guatemala 2936158421Swollman# 2937158421Swollman# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2938158421Swollman# Diario Co Latino, at 2939158421Swollman# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079, 2940158421Swollman# says in an article dated 2006-04-19 that the Guatemalan government had 2941158421Swollman# decided on that date to advance official time by 60 minutes, to lessen the 2942158421Swollman# impact of the elevated cost of oil.... Daylight saving time will last from 2943158421Swollman# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2944163302Sru# From Paul Eggert (2006-06-22): 2945163302Sru# The Ministry of Energy and Mines, press release CP-15/2006 2946163302Sru# (2006-04-19), says DST ends at 24:00. See 2947163302Sru# <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>. 2948163302Sru 29492742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 29502742SwollmanRule Guat 1973 only - Nov 25 0:00 1:00 D 29512742SwollmanRule Guat 1974 only - Feb 24 0:00 0 S 29522742SwollmanRule Guat 1983 only - May 21 0:00 1:00 D 29532742SwollmanRule Guat 1983 only - Sep 22 0:00 0 S 295420094SwollmanRule Guat 1991 only - Mar 23 0:00 1:00 D 295520094SwollmanRule Guat 1991 only - Sep 7 0:00 0 S 2956158421SwollmanRule Guat 2006 only - Apr 30 0:00 1:00 D 2957158421SwollmanRule Guat 2006 only - Oct 1 0:00 0 S 29582742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29592742SwollmanZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 29602742Swollman -6:00 Guat C%sT 29612742Swollman 29622742Swollman# Haiti 2963149514Swollman# From Gwillim Law (2005-04-15): 2964149514Swollman# Risto O. Nykanen wrote me that Haiti is now on DST. 2965149514Swollman# I searched for confirmation, and I found a 2966149514Swollman# <a href="http://www.haitianconsulate.org/time.doc"> press release 2967149514Swollman# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 2968149514Swollman# </a>. Translated from French, it says: 2969149514Swollman# 2970149514Swollman# "The Prime Minister's Communication Office notifies the public in general 2971149514Swollman# and the press in particular that, following a decision of the Interior 2972149514Swollman# Ministry and the Territorial Collectivities [I suppose that means the 2973149514Swollman# provinces], Haiti will move to Eastern Daylight Time in the night from next 2974149514Swollman# Saturday the 2nd to Sunday the 3rd. 2975149514Swollman# 2976149514Swollman# "Consequently, the Prime Minister's Communication Office wishes to inform 2977149514Swollman# the population that the country's clocks will be set forward one hour 2978149514Swollman# starting at midnight. This provision will hold until the last Saturday in 2979149514Swollman# October 2005. 2980149514Swollman# 2981149514Swollman# "Port-au-Prince, March 31, 2005" 2982158421Swollman# 2983158421Swollman# From Steffen Thorsen (2006-04-04): 2984158421Swollman# I have been informed by users that Haiti observes DST this year like 2985158421Swollman# last year, so the current "only" rule for 2005 might be changed to a 2986158421Swollman# "max" rule or to last until 2006. (Who knows if they will observe DST 2987158421Swollman# next year or if they will extend their DST like US/Canada next year). 2988158421Swollman# 2989158421Swollman# I have found this article about it (in French): 2990158421Swollman# http://www.haitipressnetwork.com/news.cfm?articleID=7612 2991158421Swollman# 2992158421Swollman# The reason seems to be an energy crisis. 2993149514Swollman 2994169811Swollman# From Stephen Colebourne (2007-02-22): 2995169811Swollman# Some IATA info: Haiti won't be having DST in 2007. 2996158421Swollman 2997240461Sedwin# From Steffen Thorsen (2012-03-11): 2998240461Sedwin# According to several news sources, Haiti will observe DST this year, 2999240461Sedwin# apparently using the same start and end date as USA/Canada. 3000240461Sedwin# So this means they have already changed their time. 3001240461Sedwin# 3002240461Sedwin# http://www.alterpresse.org/spip.php?article12510 3003240461Sedwin# http://radiovision2000haiti.net/home/?p=13253 3004240461Sedwin# 3005240461Sedwin# From Arthur David Olson (2012-03-11): 3006240461Sedwin# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 3007240461Sedwin# 3:00 a.m. rather than the traditional Haitian jump at midnight. 3008248310Sedwin# Assume a US-style fall back as well. 3009240461Sedwin 3010248310Sedwin# From Steffen Thorsen (2013-03-10): 3011248310Sedwin# It appears that Haiti is observing DST this year as well, same rules 3012248310Sedwin# as US/Canada. They did it last year as well, and it looks like they 3013248310Sedwin# are going to observe DST every year now... 3014248310Sedwin# 3015248310Sedwin# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 3016248310Sedwin# http://www.canalplushaiti.net/?p=6714 3017248310Sedwin 30182742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 30192742SwollmanRule Haiti 1983 only - May 8 0:00 1:00 D 30202742SwollmanRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 30212742SwollmanRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 3022158421Swollman# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 3023158421Swollman# Go with IATA. 302443014SwollmanRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 302543014SwollmanRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 3026169811SwollmanRule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 3027169811SwollmanRule Haiti 2005 2006 - Oct lastSun 0:00 0 S 3028248310SedwinRule Haiti 2012 max - Mar Sun>=8 2:00 1:00 D 3029248310SedwinRule Haiti 2012 max - Nov Sun>=1 2:00 0 S 30302742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 30312742SwollmanZone America/Port-au-Prince -4:49:20 - LMT 1890 30322742Swollman -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 30332742Swollman -5:00 Haiti E%sT 30342742Swollman 30352742Swollman# Honduras 3036158421Swollman# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 3037158421Swollman 3038158421Swollman# From Paul Eggert (2006-05-05): 3039158421Swollman# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 3040158421Swollman# saying Honduras will start using DST midnight Saturday, effective 4 3041158421Swollman# months until September. La Tribuna reported today 3042158421Swollman# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 3043163302Sru# of Honduras, refused to back down on this. 3044158421Swollman 3045163302Sru# From Jesper Norgaard Welen (2006-08-08): 3046163302Sru# It seems that Honduras has returned from DST to standard time this Monday at 3047163302Sru# 00:00 hours (prolonging Sunday to 25 hours duration). 3048163302Sru# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 3049163302Sru 3050163302Sru# From Paul Eggert (2006-08-08): 3051163302Sru# Also see Diario El Heraldo, The country returns to standard time (2006-08-08) 3052163302Sru# <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>. 3053163302Sru# It mentions executive decree 18-2006. 3054163302Sru 3055163302Sru# From Steffen Thorsen (2006-08-17): 3056163302Sru# Honduras will observe DST from 2007 to 2009, exact dates are not 3057163302Sru# published, I have located this authoritative source: 3058163302Sru# http://www.presidencia.gob.hn/noticia.aspx?nId=47 3059163302Sru 3060169811Swollman# From Steffen Thorsen (2007-03-30): 3061169811Swollman# http://www.laprensahn.com/pais_nota.php?id04962=7386 3062169811Swollman# So it seems that Honduras will not enter DST this year.... 3063169811Swollman 3064158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3065158421SwollmanRule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 3066158421SwollmanRule Hond 1987 1988 - Sep lastSun 0:00 0 S 3067169811SwollmanRule Hond 2006 only - May Sun>=1 0:00 1:00 D 3068169811SwollmanRule Hond 2006 only - Aug Mon>=1 0:00 0 S 30692742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 30702742SwollmanZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3071158421Swollman -6:00 Hond C%sT 307243543Swollman# 307343543Swollman# Great Swan I ceded by US to Honduras in 1972 30742742Swollman 30752742Swollman# Jamaica 3076257682Sedwin# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3077257682Sedwin# unspecified official document, and says "This time is used throughout the 3078257682Sedwin# island". Go with Milne. Round to the nearest second as required by zic. 30792742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3080257682SedwinZone America/Jamaica -5:07:11 - LMT 1890 # Kingston 3081257682Sedwin -5:07:11 - KMT 1912 Feb # Kingston Mean Time 308258787Sru -5:00 - EST 1974 Apr 28 2:00 308320094Swollman -5:00 US E%sT 1984 308420094Swollman -5:00 - EST 30852742Swollman 30862742Swollman# Martinique 30872742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 30882742SwollmanZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 308986222Swollman -4:04:20 - FFMT 1911 May # Fort-de-France MT 30902742Swollman -4:00 - AST 1980 Apr 6 30912742Swollman -4:00 1:00 ADT 1980 Sep 28 30922742Swollman -4:00 - AST 30932742Swollman 30942742Swollman# Montserrat 3095257682Sedwin# See 'southamerica'. 30962742Swollman 30972742Swollman# Nicaragua 309843543Swollman# 3099158421Swollman# This uses Shanks & Pottenger for times before 2005. 310043543Swollman# 3101149514Swollman# From Steffen Thorsen (2005-04-12): 3102149514Swollman# I've got reports from 8 different people that Nicaragua just started 3103149514Swollman# DST on Sunday 2005-04-10, in order to save energy because of 3104149514Swollman# expensive petroleum. The exact end date for DST is not yet 3105149514Swollman# announced, only "September" but some sites also say "mid-September". 3106149514Swollman# Some background information is available on the President's official site: 3107149514Swollman# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3108149514Swollman# The Decree, no 23-2005 is available here: 3109149514Swollman# 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 3110149514Swollman# 3111149514Swollman# From Paul Eggert (2005-05-01): 3112149514Swollman# The decree doesn't say anything about daylight saving, but for now let's 3113158421Swollman# assume that it is daylight saving.... 3114149514Swollman# 3115149514Swollman# From Gwillim Law (2005-04-21): 3116149514Swollman# The Associated Press story on the time change, which can be found at 3117149514Swollman# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3118149514Swollman# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3119149514Swollman# time that a change of clocks was applied to save energy was in the year 2000 3120149514Swollman# during the Arnoldo Aleman administration."... 3121149514Swollman# The northamerica file says that Nicaragua has been on UTC-6 continuously 3122149514Swollman# since December 1998. I wasn't able to find any details of Nicaraguan time 3123149514Swollman# changes in 2000. Perhaps a note could be added to the northamerica file, to 3124149514Swollman# the effect that we have indirect evidence that DST was observed in 2000. 3125149514Swollman# 3126153670Swollman# From Jesper Norgaard Welen (2005-11-02): 3127153670Swollman# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3128153670Swollman# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3129153670Swollman# (2005-09-26) 3130153670Swollman# 3131158421Swollman# From Jesper Norgaard Welen (2006-05-05): 3132158421Swollman# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3133158421Swollman# (my informal translation) 3134158421Swollman# By order of the president of the republic, Enrique Bolanos, Nicaragua 3135158421Swollman# advanced by sixty minutes their official time, yesterday at 2 in the 3136158421Swollman# morning, and will stay that way until 30.th. of september. 3137158421Swollman# 3138163302Sru# From Jesper Norgaard Welen (2006-09-30): 3139163302Sru# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3140163302Sru# My informal translation runs: 3141163302Sru# The natural sun time is restored in all the national territory, in that the 3142163302Sru# time is returned one hour at 01:00 am of October 1 of 2006. 3143163302Sru# 31442742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 31452742SwollmanRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 31462742SwollmanRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3147149514SwollmanRule Nic 2005 only - Apr 10 0:00 1:00 D 3148163302SruRule Nic 2005 only - Oct Sun>=1 0:00 0 S 3149158421SwollmanRule Nic 2006 only - Apr 30 2:00 1:00 D 3150163302SruRule Nic 2006 only - Oct Sun>=1 1:00 0 S 31512742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 31522742SwollmanZone America/Managua -5:45:08 - LMT 1890 315386222Swollman -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 31542742Swollman -6:00 - CST 1973 May 31552742Swollman -5:00 - EST 1975 Feb 16 3156158421Swollman -6:00 Nic C%sT 1992 Jan 1 4:00 3157158421Swollman -5:00 - EST 1992 Sep 24 3158158421Swollman -6:00 - CST 1993 3159158421Swollman -5:00 - EST 1997 3160149514Swollman -6:00 Nic C%sT 31612742Swollman 31622742Swollman# Panama 31632742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 31642742SwollmanZone America/Panama -5:18:08 - LMT 1890 316586222Swollman -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time 31662742Swollman -5:00 - EST 31672742Swollman 31682742Swollman# Puerto Rico 3169257682Sedwin# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 31702742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 317114343SwollmanZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 31722742Swollman -4:00 - AST 1942 May 3 3173158421Swollman -4:00 US A%sT 1946 31742742Swollman -4:00 - AST 31752742Swollman 31762742Swollman# St Kitts-Nevis 31772742Swollman# St Lucia 3178257682Sedwin# See 'southamerica'. 31792742Swollman 31802742Swollman# St Pierre and Miquelon 3181257682Sedwin# There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 31822742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 31832742SwollmanZone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 31842742Swollman -4:00 - AST 1980 May 3185121098Swollman -3:00 - PMST 1987 # Pierre & Miquelon Time 3186121098Swollman -3:00 Canada PM%sT 31872742Swollman 31882742Swollman# St Vincent and the Grenadines 3189257682Sedwin# See 'southamerica'. 31902742Swollman 31912742Swollman# Turks and Caicos 3192169811Swollman# 3193169811Swollman# From Chris Dunn in 3194169811Swollman# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007> 3195169811Swollman# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3196169811Swollman# daylight saving dates for time changes have been adjusted to match 3197169811Swollman# the recent U.S. change of dates. 3198169811Swollman# 3199169811Swollman# From Brian Inglis (2007-04-28): 3200169811Swollman# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3201169811Swollman# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3202169811Swollman# rows before that there is an out of date entry for Oct: 3203169811Swollman# "Eastern Standard Times Begins 2007 3204169811Swollman# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3205169811Swollman# indicating that the normal ET rules are followed. 3206169811Swollman# 3207169811Swollman# From Paul Eggert (2006-05-01): 3208158421Swollman# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) 3209169811Swollman# says they switch at midnight. Go with Shanks & Pottenger. 3210169811Swollman# 321120094Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3212169811SwollmanRule TC 1979 1986 - Apr lastSun 2:00 1:00 D 3213169811SwollmanRule TC 1979 2006 - Oct lastSun 2:00 0 S 3214169811SwollmanRule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D 3215169811SwollmanRule TC 2007 max - Mar Sun>=8 2:00 1:00 D 3216169811SwollmanRule TC 2007 max - Nov Sun>=1 2:00 0 S 32172742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 32182742SwollmanZone America/Grand_Turk -4:44:32 - LMT 1890 3219257682Sedwin -5:07:11 - KMT 1912 Feb # Kingston Mean Time 322020094Swollman -5:00 TC E%sT 32218029Swollman 322214343Swollman# British Virgin Is 322314343Swollman# Virgin Is 3224257682Sedwin# See 'southamerica'. 3225