northamerica revision 248310
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). 2358787Sru# 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 4375267Swollman# in his whimsical essay ``An Economical Project for Diminishing the Cost 4475267Swollman# 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): 17014343Swollman# The tables below use `NST', not `NT', for Nome Standard Time. 17114343Swollman# 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-- 240149514Swollman# (1) by striking `first Sunday of April' and inserting `second 241149514Swollman# Sunday of March'; and 242149514Swollman# (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, 394171948Sedwin# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, 395171948Sedwin# and the northern three-quarters of Idaho county), 396136638Swollman# most of Nevada, most of Oregon, and Washington 39767578Swollman# 39814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 39914343SwollmanRule CA 1948 only - Mar 14 2:00 1:00 D 40014343SwollmanRule CA 1949 only - Jan 1 2:00 0 S 40114343SwollmanRule CA 1950 1966 - Apr lastSun 2:00 1:00 D 40214343SwollmanRule CA 1950 1961 - Sep lastSun 2:00 0 S 40314343SwollmanRule CA 1962 1966 - Oct lastSun 2:00 0 S 40414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 405149514SwollmanZone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 40614343Swollman -8:00 US P%sT 1946 40714343Swollman -8:00 CA P%sT 1967 40814343Swollman -8:00 US P%sT 4098029Swollman 41014343Swollman# Alaska 41114343Swollman# AK%sT is the modern abbreviation for -9:00 per USNO. 41214343Swollman# 41386222Swollman# From Paul Eggert (2001-05-30): 41414343Swollman# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 41519878Swollman# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 41675267Swollman# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 41775267Swollman# also a Friday. Include only the time zone part of this transition, 41875267Swollman# ignoring the switch from Julian to Gregorian, since we can't represent 41975267Swollman# the Julian calendar. 42014343Swollman# 42186222Swollman# As far as we know, none of the exact locations mentioned below were 42286222Swollman# permanently inhabited in 1867 by anyone using either calendar. 42386222Swollman# (Yakutat was colonized by the Russians in 1799, but the settlement 42486222Swollman# was destroyed in 1805 by a Yakutat-kon war party.) However, there 42586222Swollman# were nearby inhabitants in some cases and for our purposes perhaps 42686222Swollman# it's best to simply use the official transition. 42786222Swollman# 428219411Sedwin 429219411Sedwin# From Steve Ferguson (2011-01-31): 430219411Sedwin# The author lives in Alaska and many of the references listed are only 431219411Sedwin# available to Alaskan residents. 432219411Sedwin# 433219411Sedwin# <a href="http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98"> 434219411Sedwin# http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98 435219411Sedwin# </a> 436219411Sedwin 437219411Sedwin# From Arthur David Olson (2011-02-01): 438219411Sedwin# Here's database-relevant material from the 2001 "Alaska History" article: 439219411Sedwin# 440219411Sedwin# On September 20 [1979]...DOT...officials decreed that on April 27, 441219411Sedwin# 1980, Juneau and other nearby communities would move to Yukon Time. 442219411Sedwin# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 443219411Sedwin# Pacific Time. 444219411Sedwin# 445219411Sedwin# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 446219411Sedwin# Department's September 1979 decision. Juneau and other communities in 447219411Sedwin# northern Southeast reverted to Pacific Time on October 26. 448219411Sedwin# 449219411Sedwin# On October 28 [1983]...the Metlakatla Indian Community Council voted 450219411Sedwin# unanimously to keep the reservation on Pacific Time. 451219411Sedwin# 452219411Sedwin# According to DOT official Joanne Petrie, Indian reservations are not 453219411Sedwin# bound to follow time zones imposed by neighboring jurisdictions. 454219411Sedwin# 455219411Sedwin# (The last is consistent with how the database now handles the Navajo 456219411Sedwin# Nation.) 457219411Sedwin 458219411Sedwin# From Arthur David Olson (2011-02-09): 459219411Sedwin# I just spoke by phone with a staff member at the Metlakatla Indian 460219411Sedwin# Community office (using contact information available at 461219411Sedwin# <a href="http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla"> 462219411Sedwin# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 463219411Sedwin# </a>). 464219411Sedwin# It's shortly after 1:00 here on the east coast of the United States; 465219411Sedwin# the staffer said it was shortly after 10:00 there. When I asked whether 466219411Sedwin# that meant they were on Pacific time, they said no--they were on their 467219411Sedwin# own time. I asked about daylight saving; they said it wasn't used. I 468219411Sedwin# did not inquire about practices in the past. 469219411Sedwin 470226298Sedwin# From Arthur David Olson (2011-08-17): 471226298Sedwin# For lack of better information, assume that Metlakatla's 472226298Sedwin# abandonment of use of daylight saving resulted from the 1983 vote. 473226298Sedwin 47414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 47575267SwollmanZone America/Juneau 15:02:19 - LMT 1867 Oct 18 47675267Swollman -8:57:41 - LMT 1900 Aug 20 12:00 47714343Swollman -8:00 - PST 1942 47814343Swollman -8:00 US P%sT 1946 47914343Swollman -8:00 - PST 1969 480219411Sedwin -8:00 US P%sT 1980 Apr 27 2:00 481240461Sedwin -9:00 US Y%sT 1980 Oct 26 2:00 48214343Swollman -8:00 US P%sT 1983 Oct 30 2:00 483136638Swollman -9:00 US Y%sT 1983 Nov 30 48414343Swollman -9:00 US AK%sT 485226298SedwinZone America/Sitka 14:58:47 - LMT 1867 Oct 18 486219411Sedwin -9:01:13 - LMT 1900 Aug 20 12:00 487219411Sedwin -8:00 - PST 1942 488219411Sedwin -8:00 US P%sT 1946 489219411Sedwin -8:00 - PST 1969 490219411Sedwin -8:00 US P%sT 1983 Oct 30 2:00 491219411Sedwin -9:00 US Y%sT 1983 Nov 30 492219411Sedwin -9:00 US AK%sT 493219411SedwinZone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 494219411Sedwin -8:46:18 - LMT 1900 Aug 20 12:00 495219411Sedwin -8:00 - PST 1942 496219411Sedwin -8:00 US P%sT 1946 497219411Sedwin -8:00 - PST 1969 498219411Sedwin -8:00 US P%sT 1983 Oct 30 2:00 499226298Sedwin -8:00 - MeST 50075267SwollmanZone America/Yakutat 14:41:05 - LMT 1867 Oct 18 50175267Swollman -9:18:55 - LMT 1900 Aug 20 12:00 50214343Swollman -9:00 - YST 1942 50314343Swollman -9:00 US Y%sT 1946 50414343Swollman -9:00 - YST 1969 505136638Swollman -9:00 US Y%sT 1983 Nov 30 50614343Swollman -9:00 US AK%sT 50775267SwollmanZone America/Anchorage 14:00:24 - LMT 1867 Oct 18 50875267Swollman -9:59:36 - LMT 1900 Aug 20 12:00 50914343Swollman -10:00 - CAT 1942 510158421Swollman -10:00 US CAT/CAWT 1945 Aug 14 23:00u 511158421Swollman -10:00 US CAT/CAPT 1946 # Peace 51214343Swollman -10:00 - CAT 1967 Apr 51314343Swollman -10:00 - AHST 1969 51414343Swollman -10:00 US AH%sT 1983 Oct 30 2:00 515136638Swollman -9:00 US Y%sT 1983 Nov 30 51614343Swollman -9:00 US AK%sT 51775267SwollmanZone America/Nome 12:58:21 - LMT 1867 Oct 18 51875267Swollman -11:01:38 - LMT 1900 Aug 20 12:00 51914343Swollman -11:00 - NST 1942 52014343Swollman -11:00 US N%sT 1946 52114343Swollman -11:00 - NST 1967 Apr 52214343Swollman -11:00 - BST 1969 52314343Swollman -11:00 US B%sT 1983 Oct 30 2:00 524136638Swollman -9:00 US Y%sT 1983 Nov 30 52514343Swollman -9:00 US AK%sT 52675267SwollmanZone America/Adak 12:13:21 - LMT 1867 Oct 18 52775267Swollman -11:46:38 - LMT 1900 Aug 20 12:00 52814343Swollman -11:00 - NST 1942 52914343Swollman -11:00 US N%sT 1946 53014343Swollman -11:00 - NST 1967 Apr 53114343Swollman -11:00 - BST 1969 53214343Swollman -11:00 US B%sT 1983 Oct 30 2:00 533136638Swollman -10:00 US AH%sT 1983 Nov 30 53414343Swollman -10:00 US HA%sT 535149514Swollman# The following switches don't quite make our 1970 cutoff. 536149514Swollman# 53714343Swollman# Shanks writes that part of southwest Alaska (e.g. Aniak) 53814343Swollman# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 53914343Swollman# and another part (e.g. Akiak) made the same switch five weeks later. 540149514Swollman# 541149514Swollman# From David Flater (2004-11-09): 542149514Swollman# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 543149514Swollman# Historic Preservation Commission, provided this information, which 544149514Swollman# suggests that Unalaska deviated from statutory time from early 1967 545149514Swollman# possibly until 1983: 546149514Swollman# 547149514Swollman# Minutes of the Unalaska City Council Meeting, January 10, 1967: 548149514Swollman# "Except for St. Paul and Akutan, Unalaska is the only important 549149514Swollman# location not on Alaska Standard Time. The following resolution was 550149514Swollman# made by William Robinson and seconded by Henry Swanson: Be it 551149514Swollman# resolved that the City of Unalaska hereby goes to Alaska Standard 552149514Swollman# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 553149514Swollman# January 14, Alaska Standard Time.) This resolution was passed with 554149514Swollman# three votes for and one against." 5552742Swollman 55614343Swollman# Hawaii 557218122Sedwin 558218122Sedwin# From Arthur David Olson (2010-12-09): 559218122Sedwin# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 560218122Sedwin# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 561218122Sedwin# the article is available at 562218122Sedwin# <a href="http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf"> 563218122Sedwin# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 564218122Sedwin# </a> 565218122Sedwin# and indicates that standard time was adopted effective noon, January 566218122Sedwin# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 567218122Sedwin# saving for the period between the last Sunday of each April and the 568218122Sedwin# last Sunday of each September, but less than a month later repealed the 569218122Sedwin# act," (page 220), that year-round daylight saving time was in effect 570218122Sedwin# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 571218122Sedwin# when clocks changed) and that clocks were changed by 30 minutes 572218122Sedwin# effective the second Sunday of June, 1947 (page 219, with no time of 573218122Sedwin# day given for when clocks changed). A footnote for the 1933 changes 574218122Sedwin# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 575218122Sedwin# and Act 163 (approved 21 May 1933)." 576218122Sedwin 577218122Sedwin# From Arthur David Olson (2011-01-19): 578218122Sedwin# The following is from "Laws of the Territory of Hawaii Passed by the 579218122Sedwin# Seventeenth Legislature: Regular Session 1933," available (as of 580218122Sedwin# 2011-01-19) at American University's Pence Law Library. Page 85: "Act 581218122Sedwin# 90...At 2 o'clock ante meridian of the last Sunday in April of each 582218122Sedwin# year, the standard time of this Territory shall be advanced one 583218122Sedwin# hour...This Act shall take effect upon its approval. Approved this 26th 584218122Sedwin# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 585218122Sedwin# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 586218122Sedwin# hereby repealed...This Act shall take effect upon its approval, upon 587218122Sedwin# which date the standard time of this Territory shall be restored to 588218122Sedwin# that existing immediately prior to the taking effect of said Act 90. 589218122Sedwin# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 590218122Sedwin# of the Territory of Hawaii." 59114343Swollman# 592218122Sedwin# Note that 1933-05-21 was a Sunday. 593218122Sedwin# We're left to guess the time of day when Act 163 was approved; guess noon. 594218122Sedwin 595218122SedwinZone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox 596218122Sedwin -10:30 - HST 1933 Apr 30 2:00 #Laws 1933 597218122Sedwin -10:30 1:00 HDT 1933 May 21 12:00 #Laws 1933+12 598218122Sedwin -10:30 - HST 1942 Feb 09 2:00 #Schmitt&Cox+2 599226298Sedwin -10:30 1:00 HDT 1945 Sep 30 2:00 #Schmitt&Cox+2 600226298Sedwin -10:30 - HST 1947 Jun 8 2:00 #Schmitt&Cox+2 60114343Swollman -10:00 - HST 6022742Swollman 60314343Swollman# Now we turn to US areas that have diverged from the consensus since 1970. 60414343Swollman 60514343Swollman# Arizona mostly uses MST. 606114173Swollman 607114173Swollman# From Paul Eggert (2002-10-20): 608114173Swollman# 609114173Swollman# The information in the rest of this paragraph is derived from the 610114173Swollman# <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> 611114173Swollman# Daylight Saving Time web page (2002-01-23)</a> maintained by the 612114173Swollman# Arizona State Library, Archives and Public Records. 613114173Swollman# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 614114173Swollman# time, but by federal law railroads, airlines, bus lines, military 615114173Swollman# personnel, and some engaged in interstate commerce continued to 616114173Swollman# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 617114173Swollman# Gazette says that was the date the law changed, and that 04-01 was 618114173Swollman# the date the state's clocks would change. In 1945 the State of 619114173Swollman# Arizona used standard time all year, again with exceptions only as 620114173Swollman# mandated by federal law. Arizona observed DST in 1967, but Arizona 621114173Swollman# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 622114173Swollman# 623114173Swollman# Shanks says the 1944 experiment came to an end on 1944-03-17. 624114173Swollman# Go with the Arizona State Library instead. 625114173Swollman 626149514SwollmanZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 62714343Swollman -7:00 US M%sT 1944 Jan 1 00:01 628114173Swollman -7:00 - MST 1944 Apr 1 00:01 62914343Swollman -7:00 US M%sT 1944 Oct 1 00:01 63014343Swollman -7:00 - MST 1967 631114173Swollman -7:00 US M%sT 1968 Mar 21 63214343Swollman -7:00 - MST 63319878Swollman# From Arthur David Olson (1988-02-13): 63414343Swollman# A writer from the Inter Tribal Council of Arizona, Inc., 635136638Swollman# notes in private correspondence dated 1987-12-28 that "Presently, only the 6362742Swollman# Navajo Nation participates in the Daylight Saving Time policy, due to its 6372742Swollman# large size and location in three states." (The "only" means that other 6382742Swollman# tribal nations don't use DST.) 6392742Swollman 64014343SwollmanLink America/Denver America/Shiprock 6412742Swollman 642136638Swollman# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 643136638Swollman# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 644136638Swollman# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 645136638Swollman# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 646171948Sedwin# Teton, Twin Falls, Valley, Washington counties, and the southern 647171948Sedwin# quarter of Idaho county) and eastern Oregon (most of Malheur County) 648136638Swollman# switched four weeks late in 1974. 649149514Swollman# 65014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 651149514SwollmanZone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 65214343Swollman -8:00 US P%sT 1923 May 13 2:00 65314343Swollman -7:00 US M%sT 1974 65414343Swollman -7:00 - MST 1974 Feb 3 2:00 65514343Swollman -7:00 US M%sT 6562742Swollman 65714343Swollman# Indiana 65814343Swollman# 65958787Sru# For a map of Indiana's time zone regions, see: 66058787Sru# <a href="http://www.mccsc.edu/time.html"> 66158787Sru# What time is it in Indiana? 662158421Swollman# </a> (2006-03-01) 66358787Sru# 664171948Sedwin# From Paul Eggert (2007-08-17): 665149590Swollman# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 666149590Swollman# with the following exceptions: 667149590Swollman# 668149590Swollman# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 669149590Swollman# Vandenburgh, and Warrick counties have been like America/Chicago. 670149590Swollman# 671149590Swollman# - Dearborn and Ohio counties have been like America/New_York. 672149590Swollman# 673149590Swollman# - Clark, Floyd, and Harrison counties have been like 674149590Swollman# America/Kentucky/Louisville. 675149590Swollman# 676171948Sedwin# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 677171948Sedwin# and Switzerland counties have their own time zone histories as noted below. 678158421Swollman# 679158421Swollman# Shanks partitioned Indiana into 345 regions, each with its own time history, 680158421Swollman# and wrote ``Even newspaper reports present contradictory information.'' 681158421Swollman# Those Hoosiers! Such a flighty and changeable people! 68214343Swollman# Fortunately, most of the complexity occurred before our cutoff date of 1970. 68314343Swollman# 68414343Swollman# Other than Indianapolis, the Indiana place names are so nondescript 68514343Swollman# that they would be ambiguous if we left them at the `America' level. 68614343Swollman# So we reluctantly put them all in a subdirectory `America/Indiana'. 68775267Swollman 688149514Swollman# From Paul Eggert (2005-08-16): 689158421Swollman# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. 69075267Swollman 691158421Swollman# From Nathan Stratton Treadway (2006-03-30): 692158421Swollman# http://www.dot.gov/affairs/dot0406.htm [3705 B] 693158421Swollman# From Deborah Goldsmith (2006-01-18): 694158421Swollman# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB] 695158421Swollman# From Paul Eggert (2006-01-20): 696158421Swollman# It says "DOT is relocating the time zone boundary in Indiana to move Starke, 697158421Swollman# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 698158421Swollman# Eastern Time Zone to the Central Time Zone.... The effective date of 699158421Swollman# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the 700158421Swollman# changeover date from standard time to Daylight Saving Time." 701158421Swollman# Strictly speaking, this means the affected counties will change their 702158421Swollman# clocks twice that night, but this obviously is in error. The intent 703158421Swollman# is that 01:59:59 EST be followed by 02:00:00 CDT. 704158421Swollman 705169811Swollman# From Gwillim Law (2007-02-10): 706169811Swollman# The Associated Press has been reporting that Pulaski County, Indiana is 707169811Swollman# going to switch from Central to Eastern Time on March 11, 2007.... 708169811Swollman# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 709169811Swollman 71014343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 71114343SwollmanRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 71214343SwollmanRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 71314343SwollmanRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 71414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 715149514SwollmanZone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 71614343Swollman -6:00 US C%sT 1920 71714343Swollman -6:00 Indianapolis C%sT 1942 71814343Swollman -6:00 US C%sT 1946 71914343Swollman -6:00 Indianapolis C%sT 1955 Apr 24 2:00 72014343Swollman -5:00 - EST 1957 Sep 29 2:00 72114343Swollman -6:00 - CST 1958 Apr 27 2:00 72214343Swollman -5:00 - EST 1969 72314343Swollman -5:00 US E%sT 1971 724149514Swollman -5:00 - EST 2006 725149514Swollman -5:00 US E%sT 7262742Swollman# 727158421Swollman# Eastern Crawford County, Indiana, left its clocks alone in 1974, 728158421Swollman# as well as from 1976 through 2005. 72914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 73014343SwollmanRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 73114343SwollmanRule Marengo 1951 only - Sep lastSun 2:00 0 S 73214343SwollmanRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 73314343SwollmanRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 73414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 735149514SwollmanZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 73614343Swollman -6:00 US C%sT 1951 73714343Swollman -6:00 Marengo C%sT 1961 Apr 30 2:00 73814343Swollman -5:00 - EST 1969 73914343Swollman -5:00 US E%sT 1974 Jan 6 2:00 74014343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 74114343Swollman -5:00 US E%sT 1976 742149514Swollman -5:00 - EST 2006 743149514Swollman -5:00 US E%sT 74414343Swollman# 745171948Sedwin# Daviess, Dubois, Knox, and Martin Counties, Indiana, 746171948Sedwin# switched from eastern to central time in April 2006, then switched back 747171948Sedwin# in November 2007. 748158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 749158421SwollmanRule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 750158421SwollmanRule Vincennes 1946 only - Sep lastSun 2:00 0 S 751158421SwollmanRule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 752158421SwollmanRule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 753158421SwollmanRule Vincennes 1955 only - May 1 0:00 1:00 D 754158421SwollmanRule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 755158421SwollmanRule Vincennes 1960 only - Oct lastSun 2:00 0 S 756158421SwollmanRule Vincennes 1961 only - Sep lastSun 2:00 0 S 757158421SwollmanRule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 758158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 759158421SwollmanZone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 760158421Swollman -6:00 US C%sT 1946 761158421Swollman -6:00 Vincennes C%sT 1964 Apr 26 2:00 762158421Swollman -5:00 - EST 1969 763158421Swollman -5:00 US E%sT 1971 764158421Swollman -5:00 - EST 2006 Apr 2 2:00 765171948Sedwin -6:00 US C%sT 2007 Nov 4 2:00 766171948Sedwin -5:00 US E%sT 767171948Sedwin# 768171948Sedwin# Perry County, Indiana, switched from eastern to central time in April 2006. 769171948Sedwin# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 770171948SedwinRule Perry 1946 only - Apr lastSun 2:00 1:00 D 771171948SedwinRule Perry 1946 only - Sep lastSun 2:00 0 S 772171948SedwinRule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 773171948SedwinRule Perry 1953 1959 - Sep lastSun 2:00 0 S 774171948SedwinRule Perry 1955 only - May 1 0:00 1:00 D 775171948SedwinRule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 776171948SedwinRule Perry 1960 only - Oct lastSun 2:00 0 S 777171948SedwinRule Perry 1961 only - Sep lastSun 2:00 0 S 778171948SedwinRule Perry 1962 1963 - Oct lastSun 2:00 0 S 779171948Sedwin# Zone NAME GMTOFF RULES FORMAT [UNTIL] 780171948SedwinZone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 781171948Sedwin -6:00 US C%sT 1946 782171948Sedwin -6:00 Perry C%sT 1964 Apr 26 2:00 783171948Sedwin -5:00 - EST 1969 784171948Sedwin -5:00 US E%sT 1971 785171948Sedwin -5:00 - EST 2006 Apr 2 2:00 786158421Swollman -6:00 US C%sT 787158421Swollman# 788158421Swollman# Pike County, Indiana moved from central to eastern time in 1977, 789171948Sedwin# then switched back in 2006, then switched back again in 2007. 790158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 791158421SwollmanRule Pike 1955 only - May 1 0:00 1:00 D 792158421SwollmanRule Pike 1955 1960 - Sep lastSun 2:00 0 S 793158421SwollmanRule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 794158421SwollmanRule Pike 1961 1964 - Oct lastSun 2:00 0 S 795158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 796158421SwollmanZone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 797158421Swollman -6:00 US C%sT 1955 798158421Swollman -6:00 Pike C%sT 1965 Apr 25 2:00 799158421Swollman -5:00 - EST 1966 Oct 30 2:00 800158421Swollman -6:00 US C%sT 1977 Oct 30 2:00 801158421Swollman -5:00 - EST 2006 Apr 2 2:00 802171948Sedwin -6:00 US C%sT 2007 Nov 4 2:00 803171948Sedwin -5:00 US E%sT 804158421Swollman# 805158421Swollman# Starke County, Indiana moved from central to eastern time in 1991, 806158421Swollman# then switched back in 2006. 80719878Swollman# From Arthur David Olson (1991-10-28): 80819878Swollman# An article on page A3 of the Sunday, 1991-10-27 Washington Post 80914343Swollman# notes that Starke County switched from Central time to Eastern time as of 81019878Swollman# 1991-10-27. 81114343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 81214343SwollmanRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 81314343SwollmanRule Starke 1947 1954 - Sep lastSun 2:00 0 S 81414343SwollmanRule Starke 1955 1956 - Oct lastSun 2:00 0 S 81514343SwollmanRule Starke 1957 1958 - Sep lastSun 2:00 0 S 81614343SwollmanRule Starke 1959 1961 - Oct lastSun 2:00 0 S 81714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 818149514SwollmanZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 81914343Swollman -6:00 US C%sT 1947 82014343Swollman -6:00 Starke C%sT 1962 Apr 29 2:00 82114343Swollman -5:00 - EST 1963 Oct 27 2:00 82214343Swollman -6:00 US C%sT 1991 Oct 27 2:00 823158421Swollman -5:00 - EST 2006 Apr 2 2:00 824158421Swollman -6:00 US C%sT 82514343Swollman# 826169811Swollman# Pulaski County, Indiana, switched from eastern to central time in 827169811Swollman# April 2006 and then switched back in March 2007. 828169811Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 829169811SwollmanRule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 830169811SwollmanRule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 831169811SwollmanRule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 832169811SwollmanRule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 833169811Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 834169811SwollmanZone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 835169811Swollman -6:00 US C%sT 1946 836169811Swollman -6:00 Pulaski C%sT 1961 Apr 30 2:00 837169811Swollman -5:00 - EST 1969 838169811Swollman -5:00 US E%sT 1971 839169811Swollman -5:00 - EST 2006 Apr 2 2:00 840169811Swollman -6:00 US C%sT 2007 Mar 11 2:00 841169811Swollman -5:00 US E%sT 842169811Swollman# 843158421Swollman# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 84414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 845149514SwollmanZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 84614343Swollman -6:00 US C%sT 1954 Apr 25 2:00 84714343Swollman -5:00 - EST 1969 84814343Swollman -5:00 US E%sT 1973 849149514Swollman -5:00 - EST 2006 850149514Swollman -5:00 US E%sT 8512742Swollman 85214343Swollman# Part of Kentucky left its clocks alone in 1974. 853149590Swollman# This also includes Clark, Floyd, and Harrison counties in Indiana. 85414343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 85514343SwollmanRule Louisville 1921 only - May 1 2:00 1:00 D 85614343SwollmanRule Louisville 1921 only - Sep 1 2:00 0 S 85714343SwollmanRule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 85814343SwollmanRule Louisville 1941 only - Sep lastSun 2:00 0 S 85914343SwollmanRule Louisville 1946 only - Jun 2 2:00 0 S 86014343SwollmanRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 86114343SwollmanRule Louisville 1956 1960 - Oct lastSun 2:00 0 S 86214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 863149514SwollmanZone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 86414343Swollman -6:00 US C%sT 1921 86514343Swollman -6:00 Louisville C%sT 1942 86614343Swollman -6:00 US C%sT 1946 86714343Swollman -6:00 Louisville C%sT 1961 Jul 23 2:00 86814343Swollman -5:00 - EST 1968 86914343Swollman -5:00 US E%sT 1974 Jan 6 2:00 87014343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 87114343Swollman -5:00 US E%sT 87267578Swollman# 873158421Swollman# Wayne County, Kentucky 87458787Sru# 87558787Sru# From 87658787Sru# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 87758787Sru# Lake Cumberland LIFE 87858787Sru# </a> (1999-01-29) via WKYM-101.7: 87958787Sru# Clinton County has joined Wayne County in asking the DoT to change from 88058787Sru# the Central to the Eastern time zone.... The Wayne County government made 88158787Sru# the same request in December. And while Russell County officials have not 88258787Sru# taken action, the majority of respondents to a poll conducted there in 88358787Sru# August indicated they would like to change to "fast time" also. 88458787Sru# The three Lake Cumberland counties are the farthest east of any U.S. 88558787Sru# location in the Central time zone. 88667578Swollman# 88767578Swollman# From Rich Wales (2000-08-29): 88867578Swollman# After prolonged debate, and despite continuing deep differences of opinion, 88967578Swollman# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 89075267Swollman# (-0500) time. They won't "fall back" this year. See Sara Shipley, 89175267Swollman# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 89286222Swollman# 89386222Swollman# From Paul Eggert (2001-07-16): 89486222Swollman# The final rule was published in the 89586222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> 89686222Swollman# Federal Register 65, 160 (2000-08-17), page 50154-50158. 89786222Swollman# </a> 898114173Swollman# 899149514SwollmanZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 90067578Swollman -6:00 US C%sT 1946 90167578Swollman -6:00 - CST 1968 90267578Swollman -6:00 US C%sT 2000 Oct 29 2:00 90367578Swollman -5:00 US E%sT 9042742Swollman 90567578Swollman 90667578Swollman# From Rives McDow (2000-08-30): 90767578Swollman# Here ... are all the changes in the US since 1985. 90867578Swollman# Kearny County, KS (put all of county on central; 90967578Swollman# previously split between MST and CST) ... 1990-10 91067578Swollman# Starke County, IN (from CST to EST) ... 1991-10 91167578Swollman# Oliver County, ND (from MST to CST) ... 1992-10 91267578Swollman# West Wendover, NV (from PST TO MST) ... 1999-10 91367578Swollman# Wayne County, KY (from CST to EST) ... 2000-10 91467578Swollman# 91586222Swollman# From Paul Eggert (2001-07-17): 91686222Swollman# We don't know where the line used to be within Kearny County, KS, 91786222Swollman# so omit that change for now. 91886222Swollman# See America/Indiana/Knox for the Starke County, IN change. 91986222Swollman# See America/North_Dakota/Center for the Oliver County, ND change. 92086222Swollman# West Wendover, NV officially switched from Pacific to mountain time on 92186222Swollman# 1999-10-31. See the 92286222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> 92386222Swollman# Federal Register 64, 203 (1999-10-21), page 56705-56707. 92486222Swollman# </a> 92586222Swollman# However, the Federal Register says that West Wendover already operated 92686222Swollman# on mountain time, and the rule merely made this official; 92786222Swollman# hence a separate tz entry is not needed. 92867578Swollman 92914343Swollman# Michigan 93014343Swollman# 93119878Swollman# From Bob Devine (1988-01-28): 93214343Swollman# Michigan didn't observe DST from 1968 to 1973. 93314343Swollman# 93458787Sru# From Paul Eggert (1999-03-31): 93558787Sru# Shanks writes that Michigan started using standard time on 1885-09-18, 93658787Sru# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 93758787Sru# that Detroit kept 93814343Swollman# 93914343Swollman# local time until 1900 when the City Council decreed that clocks should 94014343Swollman# be put back twenty-eight minutes to Central Standard Time. Half the 94114343Swollman# city obeyed, half refused. After considerable debate, the decision 94214343Swollman# was rescinded and the city reverted to Sun time. A derisive offer to 94314343Swollman# erect a sundial in front of the city hall was referred to the 94414343Swollman# Committee on Sewers. Then, in 1905, Central time was adopted 94514343Swollman# by city vote. 94614343Swollman# 94714343Swollman# This story is too entertaining to be false, so go with Howse over Shanks. 94814343Swollman# 94975267Swollman# From Paul Eggert (2001-03-06): 95075267Swollman# Garland (1927) writes ``Cleveland and Detroit advanced their clocks 95175267Swollman# one hour in 1914.'' This change is not in Shanks. We have no more 95275267Swollman# info, so omit this for now. 95375267Swollman# 95414343Swollman# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 95514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 95614343SwollmanRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 95714343SwollmanRule Detroit 1948 only - Sep lastSun 2:00 0 S 95814343SwollmanRule Detroit 1967 only - Jun 14 2:00 1:00 D 95914343SwollmanRule Detroit 1967 only - Oct lastSun 2:00 0 S 96014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 96114343SwollmanZone America/Detroit -5:32:11 - LMT 1905 96214343Swollman -6:00 - CST 1915 May 15 2:00 96314343Swollman -5:00 - EST 1942 96414343Swollman -5:00 US E%sT 1946 96514343Swollman -5:00 Detroit E%sT 1973 96614343Swollman -5:00 US E%sT 1975 96714343Swollman -5:00 - EST 1975 Apr 27 2:00 96814343Swollman -5:00 US E%sT 96914343Swollman# 970158421Swollman# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 971158421Swollman# switched from EST to CST/CDT in 1973. 97214343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 97314343SwollmanRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 97414343SwollmanRule Menominee 1946 only - Sep lastSun 2:00 0 S 97514343SwollmanRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 97614343SwollmanRule Menominee 1966 only - Oct lastSun 2:00 0 S 97714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 97814343SwollmanZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 97914343Swollman -6:00 US C%sT 1946 98014343Swollman -6:00 Menominee C%sT 1969 Apr 27 2:00 98114343Swollman -5:00 - EST 1973 Apr 29 2:00 98214343Swollman -6:00 US C%sT 98314343Swollman 9842742Swollman# Navassa 98586222Swollman# administered by the US Fish and Wildlife Service 98643543Swollman# claimed by US under the provisions of the 1856 Guano Islands Act 98743543Swollman# also claimed by Haiti 98843543Swollman# occupied 1857/1900 by the Navassa Phosphate Co 98986222Swollman# US lighthouse 1917/1996-09 99043543Swollman# currently uninhabited 99143543Swollman# see Mark Fineman, ``An Isle Rich in Guano and Discord'', 99243543Swollman# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 99343543Swollman# Jimmy Skaggs, _The Great Guano Rush_ (1994). 99414343Swollman 9952742Swollman################################################################################ 9962742Swollman 9972742Swollman 998158421Swollman# From Paul Eggert (2006-03-22): 999158421Swollman# A good source for time zone historical data outside the U.S. is 1000158421Swollman# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1001158421Swollman# San Diego: ACS Publications, Inc. (2003). 10022742Swollman# 100386222Swollman# Gwillim Law writes that a good source 100420094Swollman# for recent time zone data is the International Air Transport 100520094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 100620094Swollman# published semiannually. Law sent in several helpful summaries 100720094Swollman# of the IATA's data after 1990. 100820094Swollman# 1009158421Swollman# Except where otherwise noted, Shanks & Pottenger is the source for 1010158421Swollman# entries through 1990, and IATA SSIM is the source for entries afterwards. 101120094Swollman# 1012121098Swollman# Other sources occasionally used include: 10132742Swollman# 1014121098Swollman# Edward W. Whitman, World Time Differences, 1015121098Swollman# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1016121098Swollman# which I found in the UCLA library. 1017121098Swollman# 1018121098Swollman# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> 1019121098Swollman# William Willett, The Waste of Daylight, 19th edition 1020121098Swollman# </a> (1914-03) 1021121098Swollman# 1022248310Sedwin# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1023248310Sedwin# <http://www.jstor.org/stable/1774359>. 1024248310Sedwin# 10259908Swollman# See the `europe' file for Greenland. 10262742Swollman 10272742Swollman# Canada 10282742Swollman 1029149514Swollman# From Alain LaBont<e'> (1994-11-14): 10309908Swollman# I post here the time zone abbreviations standardized in Canada 10319908Swollman# for both English and French in the CAN/CSA-Z234.4-89 standard.... 10329908Swollman# 10339908Swollman# UTC Standard time Daylight savings time 10349908Swollman# offset French English French English 10359908Swollman# -2:30 - - HAT NDT 10369908Swollman# -3 - - HAA ADT 10379908Swollman# -3:30 HNT NST - - 10389908Swollman# -4 HNA AST HAE EDT 10399908Swollman# -5 HNE EST HAC CDT 10409908Swollman# -6 HNC CST HAR MDT 10419908Swollman# -7 HNR MST HAP PDT 10429908Swollman# -8 HNP PST HAY YDT 10439908Swollman# -9 HNY YST - - 10449908Swollman# 10459908Swollman# HN: Heure Normale ST: Standard Time 10469908Swollman# HA: Heure Avanc<e'>e DT: Daylight saving Time 10479908Swollman# 10489908Swollman# A: de l'Atlantique Atlantic 10499908Swollman# C: du Centre Central 10509908Swollman# E: de l'Est Eastern 10519908Swollman# M: Mountain 10529908Swollman# N: Newfoundland 10539908Swollman# P: du Pacifique Pacific 10549908Swollman# R: des Rocheuses 10559908Swollman# T: de Terre-Neuve 10569908Swollman# Y: du Yukon Yukon 10579908Swollman# 1058149514Swollman# From Paul Eggert (1994-11-22): 10599908Swollman# Alas, this sort of thing must be handled by localization software. 10602742Swollman 1061158421Swollman# Unless otherwise specified, the data for Canada are all from Shanks 1062158421Swollman# & Pottenger. 10639908Swollman 1064169811Swollman# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1065169811Swollman# 2007-03-01): 1066158421Swollman# The British Columbia government announced yesterday that it will 1067158421Swollman# adjust daylight savings next year to align with changes in the 1068158421Swollman# U.S. and the rest of Canada.... 1069158421Swollman# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1070169811Swollman# ... 1071169811Swollman# Nova Scotia 1072163302Sru# Daylight saving time will be extended by four weeks starting in 2007.... 1073169811Swollman# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1074169811Swollman# 1075163302Sru# [For New Brunswick] the new legislation dictates that the time change is to 1076163302Sru# be done at 02:00 instead of 00:01. 1077163302Sru# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1078163302Sru# ... 1079163302Sru# Manitoba has traditionally changed the clock every fall at 03:00. 1080163302Sru# As of 2006, the transition is to take place one hour earlier at 02:00. 1081163302Sru# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1082163302Sru# ... 1083163302Sru# [Alberta, Ontario, Quebec] will follow US rules. 1084169811Swollman# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1085163302Sru# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1086169811Swollman# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1087163302Sru# ... 1088169811Swollman# P.E.I. will follow US rules.... 1089169811Swollman# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1090163302Sru# ... 1091169811Swollman# Province of Newfoundland and Labrador.... 1092169811Swollman# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1093163302Sru# ... 1094169811Swollman# Yukon 1095169811Swollman# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1096169811Swollman# ... 1097163302Sru# N.W.T. will follow US rules. Whoever maintains the government web site 1098163302Sru# does not seem to believe in bookmarks. To see the news release, click the 1099163302Sru# following link and search for "Daylight Savings Time Change". Press the 1100163302Sru# "Daylight Savings Time Change" link; it will fire off a popup using 1101163302Sru# JavaScript. 1102163302Sru# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1103169811Swollman# ... 1104169811Swollman# Nunavut 1105169811Swollman# An amendment to the Interpretation Act was registered on February 19/2007.... 1106169811Swollman# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1107163302Sru 1108158421Swollman# From Paul Eggert (2006-04-25): 110967578Swollman# H. David Matthews and Mary Vincent's map 1110153761Swollman# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp"> 111167578Swollman# "It's about TIME", _Canadian Geographic_ (September-October 1998) 111267578Swollman# </a> contains detailed boundaries for regions observing nonstandard 111367578Swollman# time and daylight saving time arrangements in Canada circa 1998. 111467578Swollman# 1115153761Swollman# INMS, the Institute for National Measurement Standards in Ottawa, has <a 1116153761Swollman# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php"> 111767578Swollman# information about standard and daylight saving time zones in Canada. 111867578Swollman# </a> (updated periodically). 111967578Swollman# Its unofficial information is often taken from Matthews and Vincent. 11209908Swollman 1121163302Sru# From Paul Eggert (2006-06-27): 1122163302Sru# For now, assume all of DST-observing Canada will fall into line with the 1123163302Sru# new US DST rules, 1124163302Sru 1125233447Sedwin# From Chris Walton (2011-12-01) 1126233447Sedwin# In the first of Tammy Hardwick's articles 1127233447Sedwin# <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260"> 1128233447Sedwin# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1129233447Sedwin# </a> 1130233447Sedwin# she quotes the Friday November 1/1918 edition of the Creston Review. 1131233447Sedwin# The quote includes these two statements: 1132233447Sedwin# 'Sunday the CPR went back to the old system of time...' 1133233447Sedwin# '... The daylight saving scheme was dropped all over Canada at the same time,' 1134233447Sedwin# These statements refer to a transition from daylight time to standard time 1135233447Sedwin# that occurred nationally on Sunday October 27/1918. This transition was 1136233447Sedwin# also documented in the Saturday October 26/1918 edition of the Toronto Star. 1137233447Sedwin 1138233447Sedwin# In light of that evidence, we alter the date from the earlier believed 1139233447Sedwin# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1140233447Sedwin# than Thursday) in all Canadian rulesets. 1141233447Sedwin 11422742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 114317200SwollmanRule Canada 1918 only - Apr 14 2:00 1:00 D 1144233447SedwinRule Canada 1918 only - Oct 27 2:00 0 S 1145121098SwollmanRule Canada 1942 only - Feb 9 2:00 1:00 W # War 1146121098SwollmanRule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 114717200SwollmanRule Canada 1945 only - Sep 30 2:00 0 S 114817200SwollmanRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1149153761SwollmanRule Canada 1974 2006 - Oct lastSun 2:00 0 S 1150153761SwollmanRule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1151153761SwollmanRule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1152153761SwollmanRule Canada 2007 max - Nov Sun>=1 2:00 0 S 115317200Swollman 115417200Swollman 1155163302Sru# Newfoundland and Labrador 115617200Swollman 115767578Swollman# From Paul Eggert (2000-10-02): 115867578Swollman# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 115967578Swollman# but the only part of Labrador that follows the rules is the 116067578Swollman# southeast corner, including Port Hope Simpson and Mary's Harbour, 116167578Swollman# but excluding, say, Black Tickle. 116267578Swollman 116317200Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1164121098SwollmanRule StJohns 1917 only - Apr 8 2:00 1:00 D 11652742SwollmanRule StJohns 1917 only - Sep 17 2:00 0 S 1166158421Swollman# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 11672742SwollmanRule StJohns 1919 only - May 5 23:00 1:00 D 11682742SwollmanRule StJohns 1919 only - Aug 12 23:00 0 S 1169158421Swollman# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 11702742SwollmanRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 11712742SwollmanRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1172158421Swollman# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1173158421Swollman# Pottenger. 1174121098SwollmanRule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1175121098SwollmanRule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1176121098Swollman# Whitman gives the following transitions: 1177121098Swollman# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1178158421Swollman# but go with Shanks & Pottenger and assume they used Canadian rules. 11792742Swollman# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1180158421Swollman# Apr 30 - Sep 24; go with Shanks & Pottenger. 11812742SwollmanRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 11822742SwollmanRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 11832742SwollmanRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 11842742SwollmanRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 118567578SwollmanRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 118667578Swollman# From Paul Eggert (2000-10-02): 118767578Swollman# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 118867578Swollman# at 00:01 local time. For now, assume it started in 1987. 1189226298Sedwin 1190226298Sedwin# From Michael Pelley (2011-09-12): 1191226298Sedwin# We received today, Monday, September 12, 2011, notification that the 1192226298Sedwin# changes to the Newfoundland Standard Time Act have been proclaimed. 1193226298Sedwin# The change in the Act stipulates that the change from Daylight Savings 1194226298Sedwin# Time to Standard Time and from Standard Time to Daylight Savings Time 1195226298Sedwin# now occurs at 2:00AM. 1196226298Sedwin# ... 1197226298Sedwin# <a href="http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm"> 1198226298Sedwin# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1199226298Sedwin# </a> 1200226298Sedwin# ... 1201226298Sedwin# MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1202226298Sedwin# Office of the Chief Information Officer 1203226298Sedwin# Executive Council 1204226298Sedwin# Government of Newfoundland & Labrador 1205226298Sedwin 120667578SwollmanRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1207158421SwollmanRule StJohns 1987 2006 - Oct lastSun 0:01 0 S 120867578SwollmanRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1209158421SwollmanRule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1210226298SedwinRule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1211226298SedwinRule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1212158421Swollman# 12132742Swollman# St John's has an apostrophe, but Posix file names can't have apostrophes. 12142742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 12152742SwollmanZone America/St_Johns -3:30:52 - LMT 1884 1216121098Swollman -3:30:52 StJohns N%sT 1918 1217121098Swollman -3:30:52 Canada N%sT 1919 121820094Swollman -3:30:52 StJohns N%sT 1935 Mar 30 1219121098Swollman -3:30 StJohns N%sT 1942 May 11 1220121098Swollman -3:30 Canada N%sT 1946 1221226298Sedwin -3:30 StJohns N%sT 2011 Nov 1222226298Sedwin -3:30 Canada N%sT 12232742Swollman 122467578Swollman# most of east Labrador 122517200Swollman 122620094Swollman# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. 122720094Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 122820094SwollmanZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1229121098Swollman -3:30:52 - NST 1918 1230121098Swollman -3:30:52 Canada N%sT 1919 123120094Swollman -3:30:52 - NST 1935 Mar 30 123220094Swollman -3:30 - NST 1936 1233121098Swollman -3:30 StJohns N%sT 1942 May 11 1234121098Swollman -3:30 Canada N%sT 1946 123520094Swollman -3:30 StJohns N%sT 1966 Mar 15 2:00 1236226298Sedwin -4:00 StJohns A%sT 2011 Nov 1237226298Sedwin -4:00 Canada A%sT 123820094Swollman 123920094Swollman 1240158421Swollman# west Labrador, Nova Scotia, Prince Edward I 124120094Swollman 1242158421Swollman# From Paul Eggert (2006-03-22): 1243158421Swollman# Shanks & Pottenger write that since 1970 most of this region has been like 1244158421Swollman# Halifax. Many locales did not observe peacetime DST until 1972; 124517200Swollman# Glace Bay, NS is the largest that we know of. 1246158421Swollman# Shanks & Pottenger also write that Liverpool, NS was the only town 1247158421Swollman# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1248158421Swollman# this is a typo. 124917200Swollman 12502742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1251158421SwollmanRule Halifax 1916 only - Apr 1 0:00 1:00 D 1252158421SwollmanRule Halifax 1916 only - Oct 1 0:00 0 S 1253158421SwollmanRule Halifax 1920 only - May 9 0:00 1:00 D 1254158421SwollmanRule Halifax 1920 only - Aug 29 0:00 0 S 1255158421SwollmanRule Halifax 1921 only - May 6 0:00 1:00 D 1256158421SwollmanRule Halifax 1921 1922 - Sep 5 0:00 0 S 1257158421SwollmanRule Halifax 1922 only - Apr 30 0:00 1:00 D 1258158421SwollmanRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1259158421SwollmanRule Halifax 1923 only - Sep 4 0:00 0 S 1260158421SwollmanRule Halifax 1924 only - Sep 15 0:00 0 S 1261158421SwollmanRule Halifax 1925 only - Sep 28 0:00 0 S 1262158421SwollmanRule Halifax 1926 only - May 16 0:00 1:00 D 1263158421SwollmanRule Halifax 1926 only - Sep 13 0:00 0 S 1264158421SwollmanRule Halifax 1927 only - May 1 0:00 1:00 D 1265158421SwollmanRule Halifax 1927 only - Sep 26 0:00 0 S 1266158421SwollmanRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1267158421SwollmanRule Halifax 1928 only - Sep 9 0:00 0 S 1268158421SwollmanRule Halifax 1929 only - Sep 3 0:00 0 S 1269158421SwollmanRule Halifax 1930 only - Sep 15 0:00 0 S 1270158421SwollmanRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1271158421SwollmanRule Halifax 1932 only - May 1 0:00 1:00 D 1272158421SwollmanRule Halifax 1933 only - Apr 30 0:00 1:00 D 1273158421SwollmanRule Halifax 1933 only - Oct 2 0:00 0 S 1274158421SwollmanRule Halifax 1934 only - May 20 0:00 1:00 D 1275158421SwollmanRule Halifax 1934 only - Sep 16 0:00 0 S 1276158421SwollmanRule Halifax 1935 only - Jun 2 0:00 1:00 D 1277158421SwollmanRule Halifax 1935 only - Sep 30 0:00 0 S 1278158421SwollmanRule Halifax 1936 only - Jun 1 0:00 1:00 D 1279158421SwollmanRule Halifax 1936 only - Sep 14 0:00 0 S 1280158421SwollmanRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1281158421SwollmanRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1282158421SwollmanRule Halifax 1939 only - May 28 0:00 1:00 D 1283158421SwollmanRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1284158421SwollmanRule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1285158421SwollmanRule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1286158421SwollmanRule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1287158421SwollmanRule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1288158421SwollmanRule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1289158421SwollmanRule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1290158421SwollmanRule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1291158421SwollmanRule Halifax 1962 1973 - Oct lastSun 2:00 0 S 12922742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 12932742SwollmanZone America/Halifax -4:14:24 - LMT 1902 Jun 15 1294121098Swollman -4:00 Halifax A%sT 1918 1295121098Swollman -4:00 Canada A%sT 1919 1296121098Swollman -4:00 Halifax A%sT 1942 Feb 9 2:00s 1297121098Swollman -4:00 Canada A%sT 1946 1298121098Swollman -4:00 Halifax A%sT 1974 1299121098Swollman -4:00 Canada A%sT 130017200SwollmanZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 130117200Swollman -4:00 Canada A%sT 1953 130217200Swollman -4:00 Halifax A%sT 1954 130317200Swollman -4:00 - AST 1972 1304121098Swollman -4:00 Halifax A%sT 1974 1305121098Swollman -4:00 Canada A%sT 13062742Swollman 1307158421Swollman# New Brunswick 13088029Swollman 1309169811Swollman# From Paul Eggert (2007-01-31): 1310169811Swollman# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1311169811Swollman# says they changed at 00:01 through 2006, and 1312158421Swollman# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1313169811Swollman# clear that this was the case since at least 1993. 1314163302Sru# For now, assume it started in 1993. 1315158421Swollman 1316158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1317158421SwollmanRule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1318158421SwollmanRule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1319158421SwollmanRule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1320158421SwollmanRule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1321158421SwollmanRule Moncton 1939 only - May 27 1:00 1:00 D 1322158421SwollmanRule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1323158421SwollmanRule Moncton 1940 only - May 19 1:00 1:00 D 1324158421SwollmanRule Moncton 1941 only - May 4 1:00 1:00 D 1325158421SwollmanRule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1326158421SwollmanRule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1327158421SwollmanRule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1328158421SwollmanRule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1329158421SwollmanRule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1330158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1331158421SwollmanZone America/Moncton -4:19:08 - LMT 1883 Dec 9 1332158421Swollman -5:00 - EST 1902 Jun 15 1333158421Swollman -4:00 Canada A%sT 1933 1334158421Swollman -4:00 Moncton A%sT 1942 1335158421Swollman -4:00 Canada A%sT 1946 1336158421Swollman -4:00 Moncton A%sT 1973 1337158421Swollman -4:00 Canada A%sT 1993 1338163302Sru -4:00 Moncton A%sT 2007 1339163302Sru -4:00 Canada A%sT 1340158421Swollman 1341163302Sru# Quebec 134217200Swollman 1343163302Sru# From Paul Eggert (2006-07-09): 1344163302Sru# Shanks & Pottenger write that since 1970 most of Quebec has been 1345163302Sru# like Montreal. 1346163302Sru 1347163302Sru# From Paul Eggert (2006-06-27): 1348163302Sru# Matthews and Vincent (1998) also write that Quebec east of the -63 1349163302Sru# meridian is supposed to observe AST, but residents as far east as 1350163302Sru# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1351163302Sru# In "Official time in Quebec" the Quebec department of justice writes in 1352163302Sru# http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm 1353163302Sru# that "The residents of the Municipality of the 1354163302Sru# Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin, 1355163302Sru# Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is 1356163302Sru# written and use Atlantic standard time all year round. The same applies to 1357163302Sru# the residents of the Native facilities along the lower North Shore." 1358163302Sru# <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm> 1359163302Sru# says this common practice was codified into law as of 2007. 1360163302Sru# For lack of better info, guess this practice began around 1970, contra to 1361163302Sru# Shanks & Pottenger who have this region observing AST/ADT. 1362163302Sru 1363163302Sru# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1364163302SruRule Mont 1917 only - Mar 25 2:00 1:00 D 1365163302SruRule Mont 1917 only - Apr 24 0:00 0 S 1366163302SruRule Mont 1919 only - Mar 31 2:30 1:00 D 1367163302SruRule Mont 1919 only - Oct 25 2:30 0 S 1368163302SruRule Mont 1920 only - May 2 2:30 1:00 D 1369163302SruRule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 1370163302SruRule Mont 1921 only - May 1 2:00 1:00 D 1371163302SruRule Mont 1922 only - Apr 30 2:00 1:00 D 1372163302SruRule Mont 1924 only - May 17 2:00 1:00 D 1373163302SruRule Mont 1924 1926 - Sep lastSun 2:30 0 S 1374163302SruRule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1375163302Sru# The 1927-to-1937 rules can be expressed more simply as 1376163302Sru# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1377163302Sru# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 1378163302Sru# The rules below avoid use of 24:00 1379163302Sru# (which pre-1998 versions of zic cannot handle). 1380163302SruRule Mont 1927 only - May 1 0:00 1:00 D 1381163302SruRule Mont 1927 1932 - Sep lastSun 0:00 0 S 1382163302SruRule Mont 1928 1931 - Apr lastSun 0:00 1:00 D 1383163302SruRule Mont 1932 only - May 1 0:00 1:00 D 1384163302SruRule Mont 1933 1940 - Apr lastSun 0:00 1:00 D 1385163302SruRule Mont 1933 only - Oct 1 0:00 0 S 1386163302SruRule Mont 1934 1939 - Sep lastSun 0:00 0 S 1387163302SruRule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 1388163302SruRule Mont 1945 1948 - Sep lastSun 2:00 0 S 1389163302SruRule Mont 1949 1950 - Oct lastSun 2:00 0 S 1390163302SruRule Mont 1951 1956 - Sep lastSun 2:00 0 S 1391163302SruRule Mont 1957 1973 - Oct lastSun 2:00 0 S 1392163302Sru 1393163302Sru# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1394163302SruZone America/Blanc-Sablon -3:48:28 - LMT 1884 1395163302Sru -4:00 Canada A%sT 1970 1396163302Sru -4:00 - AST 1397163302SruZone America/Montreal -4:54:16 - LMT 1884 1398163302Sru -5:00 Mont E%sT 1918 1399163302Sru -5:00 Canada E%sT 1919 1400163302Sru -5:00 Mont E%sT 1942 Feb 9 2:00s 1401163302Sru -5:00 Canada E%sT 1946 1402163302Sru -5:00 Mont E%sT 1974 1403163302Sru -5:00 Canada E%sT 1404163302Sru 1405163302Sru 1406163302Sru# Ontario 1407163302Sru 1408163302Sru# From Paul Eggert (2006-07-09): 1409163302Sru# Shanks & Pottenger write that since 1970 most of Ontario has been like 1410163302Sru# Toronto. 141117200Swollman# Thunder Bay skipped DST in 1973. 141217200Swollman# Many smaller locales did not observe peacetime DST until 1974; 141317200Swollman# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 141417200Swollman# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 141517200Swollman 1416121098Swollman# From Mark Brader (2003-07-26): 1417121098Swollman# [According to the Toronto Star] Orillia, Ontario, adopted DST 1418121098Swollman# effective Saturday, 1912-06-22, 22:00; the article mentions that 1419121098Swollman# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1420121098Swollman# have already done so. In Orillia DST was to run until Saturday, 1421121098Swollman# 1912-08-31 (no time mentioned), but it was met with considerable 1422121098Swollman# hostility from certain segments of the public, and was revoked after 1423121098Swollman# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but 1424121098Swollman# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1425121098Swollman# earlier in June). 1426121098Swollman# 1427121098Swollman# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1428121098Swollman 142943014Swollman# From Paul Eggert (1997-10-17): 1430121098Swollman# Mark Brader writes that an article in the 1997-10-14 Toronto Star 143143014Swollman# says that Atikokan, Ontario currently does not observe DST, 143243014Swollman# but will vote on 11-10 whether to use EST/EDT. 143343014Swollman# He also writes that the 143443014Swollman# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 143543014Swollman# Ontario Time Act (1990, Chapter T.9) 143643014Swollman# </a> 143743014Swollman# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 143843014Swollman# Officially Atikokan is therefore on CST/CDT, and most likely this report 143943014Swollman# concerns a non-official time observed as a matter of local practice. 1440158421Swollman# 144167578Swollman# From Paul Eggert (2000-10-02): 144267578Swollman# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 144367578Swollman# New Osnaburgh observe CST all year, that Big Trout Lake observes 144467578Swollman# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 144567578Swollman# violation of the official Ontario rules. 1446163302Sru# 1447163302Sru# From Paul Eggert (2006-07-09): 1448163302Sru# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1449163302Sru# 2005-07-21 Chronicle-Journal, which said: 1450163302Sru# 1451163302Sru# The clocks in Atikokan stay set on standard time year-round. 1452163302Sru# This means they spend about half the time on central time and 1453163302Sru# the other half on eastern time. 1454163302Sru# 1455163302Sru# For the most part, the system works, Mayor Dennis Brown said. 1456163302Sru# 1457163302Sru# "The majority of businesses in Atikokan deal more with Eastern 1458163302Sru# Canada, but there are some that deal with Western Canada," he 1459163302Sru# said. "I don't see any changes happening here." 1460163302Sru# 1461163302Sru# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1462163302Sru# [New Osnaburgh] follow the same practice." 146367578Swollman 1464163302Sru# From Garry McKinnon (2006-07-14) via Chris Walton: 1465163302Sru# I chatted with a member of my board who has an outstanding memory 1466163302Sru# and a long history in Atikokan (and in the telecom industry) and he 1467163302Sru# can say for certain that Atikokan has been practicing the current 1468163302Sru# time keeping since 1952, at least. 1469163302Sru 1470163302Sru# From Paul Eggert (2006-07-17): 1471163302Sru# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1472163302Sru# ever since standard time was introduced, but the information from 1473163302Sru# McKinnon sounds more authoritative. For now, assume that Atikokan 1474163302Sru# switched to EST immediately after WWII era daylight saving time 1475163302Sru# ended. This matches the old (less-populous) America/Coral_Harbour 1476163302Sru# entry since our cutoff date of 1970, so we can move 1477163302Sru# America/Coral_Harbour to the 'backward' file. 1478163302Sru 1479210718Sedwin# From Mark Brader (2010-03-06): 1480210718Sedwin# 1481210718Sedwin# Currently the database has: 1482210718Sedwin# 1483210718Sedwin# # Ontario 1484210718Sedwin# 1485210718Sedwin# # From Paul Eggert (2006-07-09): 1486210718Sedwin# # Shanks & Pottenger write that since 1970 most of Ontario has been like 1487210718Sedwin# # Toronto. 1488210718Sedwin# # Thunder Bay skipped DST in 1973. 1489210718Sedwin# # Many smaller locales did not observe peacetime DST until 1974; 1490210718Sedwin# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1491210718Sedwin# 1492210718Sedwin# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1493210718Sedwin# right corner of page 1, it says that Toronto will return to standard 1494210718Sedwin# time at 2 am Sunday morning (which agrees with the database), and that: 1495210718Sedwin# 1496210718Sedwin# The one-hour setback will go into effect throughout most of Ontario, 1497210718Sedwin# except in areas like Windsor which remains on standard time all year. 1498210718Sedwin# 1499210718Sedwin# Windsor is, of course, a lot larger than Nipigon. 1500210718Sedwin# 1501210718Sedwin# I only came across this incidentally. I don't know if Windsor began 1502210718Sedwin# observing DST when Detroit did, or in 1974, or on some other date. 1503210718Sedwin# 1504210718Sedwin# By the way, the article continues by noting that: 1505210718Sedwin# 1506210718Sedwin# Some cities in the United States have pushed the deadline back 1507210718Sedwin# three weeks and will change over from daylight saving in October. 1508210718Sedwin 1509210718Sedwin# From Arthur David Olson (2010-07-17): 1510210718Sedwin# 1511210718Sedwin# "Standard Time and Time Zones in Canada" appeared in 1512210718Sedwin# The Journal of The Royal Astronomical Society of Canada, 1513210718Sedwin# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1514210718Sedwin# was available at 1515210718Sedwin# <a href="http://adsabs.harvard.edu/full/1932JRASC..26...49S"> 1516210718Sedwin# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1517210718Sedwin# </a> 1518210718Sedwin# 1519210718Sedwin# It includes the text below (starting on page 57): 1520210718Sedwin# 1521210718Sedwin# A list of the places in Canada using daylight saving time would 1522210718Sedwin# require yearly revision. From information kindly furnished by 1523210718Sedwin# the provincial governments and by the postmasters in many cities 1524210718Sedwin# and towns, it is found that the following places used daylight sav- 1525210718Sedwin# ing in 1930. The information for the province of Quebec is definite, 1526210718Sedwin# for the other provinces only approximate: 1527210718Sedwin# 1528210718Sedwin# Province Daylight saving time used 1529210718Sedwin# Prince Edward Island Not used. 1530210718Sedwin# Nova Scotia In Halifax only. 1531210718Sedwin# New Brunswick In St. John only. 1532210718Sedwin# Quebec In the following places: 1533210718Sedwin# Montreal Lachine 1534210718Sedwin# Quebec Mont-Royal 1535210718Sedwin# Levis Iberville 1536210718Sedwin# St. Lambert Cap de la Madeleine 1537210718Sedwin# Verdun Loretteville 1538210718Sedwin# Westmount Richmond 1539210718Sedwin# Outremont St. Jerome 1540210718Sedwin# Longueuil Greenfield Park 1541210718Sedwin# Arvida Waterloo 1542210718Sedwin# Chambly-Canton Beaulieu 1543210718Sedwin# Melbourne La Tuque 1544210718Sedwin# St. Theophile Buckingham 1545210718Sedwin# Ontario Used generally in the cities and towns along 1546210718Sedwin# the southerly part of the province. Not 1547210718Sedwin# used in the northwesterlhy part. 1548210718Sedwin# Manitoba Not used. 1549210718Sedwin# Saskatchewan In Regina only. 1550210718Sedwin# Alberta Not used. 1551210718Sedwin# British Columbia Not used. 1552210718Sedwin# 1553210718Sedwin# With some exceptions, the use of daylight saving may be said to be limited 1554210718Sedwin# to those cities and towns lying between Quebec city and Windsor, Ont. 1555210718Sedwin 15562742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1557121098SwollmanRule Toronto 1919 only - Mar 30 23:30 1:00 D 1558121098SwollmanRule Toronto 1919 only - Oct 26 0:00 0 S 1559121098SwollmanRule Toronto 1920 only - May 2 2:00 1:00 D 1560121098SwollmanRule Toronto 1920 only - Sep 26 0:00 0 S 1561121098SwollmanRule Toronto 1921 only - May 15 2:00 1:00 D 1562121098SwollmanRule Toronto 1921 only - Sep 15 2:00 0 S 1563121098SwollmanRule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1564158421Swollman# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1565158421Swollman# was meant. 1566121098SwollmanRule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1567121098SwollmanRule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1568136638Swollman# The 1927-to-1939 rules can be expressed more simply as 1569136638Swollman# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1570136638Swollman# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1571136638Swollman# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1572136638Swollman# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1573136638Swollman# The rules below avoid use of Sun>=25 1574136638Swollman# (which pre-2004 versions of zic cannot handle). 1575136638SwollmanRule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1576136638SwollmanRule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1577136638SwollmanRule Toronto 1932 only - May 1 2:00 1:00 D 1578136638SwollmanRule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1579136638SwollmanRule Toronto 1933 only - Oct 1 2:00 0 S 1580136638SwollmanRule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1581121098SwollmanRule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1582121098SwollmanRule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1583121098SwollmanRule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1584121098SwollmanRule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1585121098SwollmanRule Toronto 1949 only - Nov lastSun 0:00 0 S 1586121098SwollmanRule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1587121098SwollmanRule Toronto 1950 only - Nov lastSun 2:00 0 S 1588121098SwollmanRule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1589158421Swollman# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1590163302Sru# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1591163302Sru# is wrong, and that he had confirmed it by checking the 1971-10-30 1592163302Sru# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1593121098SwollmanRule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1594121098Swollman 1595121098Swollman# From Paul Eggert (2003-07-27): 1596121098Swollman# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1597121098Swollman# Port Arthur, Ontario, the principle of the Bill has been in 1598121098Swollman# operation for the past three years, and in the City of Moose Jaw, 1599136638Swollman# Saskatchewan, for one year." 1600121098Swollman 1601136638Swollman# From David Bryan via Tory Tronrud, Director/Curator, 1602136638Swollman# Thunder Bay Museum (2003-11-12): 1603136638Swollman# There is some suggestion, however, that, by-law or not, daylight 1604136638Swollman# savings time was being practiced in Fort William and Port Arthur 1605136638Swollman# before 1909.... [I]n 1910, the line between the Eastern and Central 1606136638Swollman# Time Zones was permanently moved about two hundred miles west to 1607136638Swollman# include the Thunder Bay area.... When Canada adopted daylight 1608136638Swollman# savings time in 1916, Fort William and Port Arthur, having done so 1609136638Swollman# already, did not change their clocks.... During the Second World 1610136638Swollman# War,... [t]he cities agreed to implement DST during the summer 1611136638Swollman# months for the remainder of the war years. 1612136638Swollman 16132742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1614121098SwollmanZone America/Toronto -5:17:32 - LMT 1895 1615121098Swollman -5:00 Canada E%sT 1919 1616121098Swollman -5:00 Toronto E%sT 1942 Feb 9 2:00s 1617121098Swollman -5:00 Canada E%sT 1946 1618121098Swollman -5:00 Toronto E%sT 1974 1619121098Swollman -5:00 Canada E%sT 162017200SwollmanZone America/Thunder_Bay -5:57:00 - LMT 1895 1621136638Swollman -6:00 - CST 1910 1622136638Swollman -5:00 - EST 1942 162317200Swollman -5:00 Canada E%sT 1970 162417200Swollman -5:00 Mont E%sT 1973 162517200Swollman -5:00 - EST 1974 162617200Swollman -5:00 Canada E%sT 162717200SwollmanZone America/Nipigon -5:53:04 - LMT 1895 1628121098Swollman -5:00 Canada E%sT 1940 Sep 29 1629121098Swollman -5:00 1:00 EDT 1942 Feb 9 2:00s 163017200Swollman -5:00 Canada E%sT 1631163302SruZone America/Rainy_River -6:18:16 - LMT 1895 1632121098Swollman -6:00 Canada C%sT 1940 Sep 29 1633121098Swollman -6:00 1:00 CDT 1942 Feb 9 2:00s 163417200Swollman -6:00 Canada C%sT 1635163302SruZone America/Atikokan -6:06:28 - LMT 1895 1636163302Sru -6:00 Canada C%sT 1940 Sep 29 1637163302Sru -6:00 1:00 CDT 1942 Feb 9 2:00s 1638163302Sru -6:00 Canada C%sT 1945 Sep 30 2:00 1639163302Sru -5:00 - EST 16402742Swollman 16418029Swollman 164217200Swollman# Manitoba 164319878Swollman 1644158421Swollman# From Rob Douglas (2006-04-06): 1645158421Swollman# the old Manitoba Time Act - as amended by Bill 2, assented to 1646158421Swollman# March 27, 1987 ... said ... 1647158421Swollman# "between two o'clock Central Standard Time in the morning of 1648158421Swollman# the first Sunday of April of each year and two o'clock Central 1649158421Swollman# Standard Time in the morning of the last Sunday of October next 1650158421Swollman# following, one hour in advance of Central Standard Time."... 1651158421Swollman# I believe that the English legislation [of the old time act] had = 1652158421Swollman# been assented to (March 22, 1967).... 1653158421Swollman# Also, as far as I can tell, there was no order-in-council varying 1654158421Swollman# the time of Daylight Saving Time for 2005 and so the provisions of 1655158421Swollman# the 1987 version would apply - the changeover was at 2:00 Central 1656158421Swollman# Standard Time (i.e. not until 3:00 Central Daylight Time). 1657158421Swollman 1658158421Swollman# From Paul Eggert (2006-04-10): 1659158421Swollman# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1660158421Swollman# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1661158421Swollman# it was also 02:00s in 1966. 1662158421Swollman 16632742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16642742SwollmanRule Winn 1916 only - Apr 23 0:00 1:00 D 16652742SwollmanRule Winn 1916 only - Sep 17 0:00 0 S 16662742SwollmanRule Winn 1918 only - Apr 14 2:00 1:00 D 1667233447SedwinRule Winn 1918 only - Oct 27 2:00 0 S 16682742SwollmanRule Winn 1937 only - May 16 2:00 1:00 D 166914343SwollmanRule Winn 1937 only - Sep 26 2:00 0 S 1670121098SwollmanRule Winn 1942 only - Feb 9 2:00 1:00 W # War 1671121098SwollmanRule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 16722742SwollmanRule Winn 1945 only - Sep lastSun 2:00 0 S 16732742SwollmanRule Winn 1946 only - May 12 2:00 1:00 D 16742742SwollmanRule Winn 1946 only - Oct 13 2:00 0 S 16752742SwollmanRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 167614343SwollmanRule Winn 1947 1949 - Sep lastSun 2:00 0 S 167714343SwollmanRule Winn 1950 only - May 1 2:00 1:00 D 167814343SwollmanRule Winn 1950 only - Sep 30 2:00 0 S 167914343SwollmanRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 168014343SwollmanRule Winn 1951 1958 - Sep lastSun 2:00 0 S 16812742SwollmanRule Winn 1959 only - Oct lastSun 2:00 0 S 16822742SwollmanRule Winn 1960 only - Sep lastSun 2:00 0 S 16832742SwollmanRule Winn 1963 only - Apr lastSun 2:00 1:00 D 168414343SwollmanRule Winn 1963 only - Sep 22 2:00 0 S 1685158421SwollmanRule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1686158421SwollmanRule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1687158421SwollmanRule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 16882742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16892742SwollmanZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1690158421Swollman -6:00 Winn C%sT 2006 1691158421Swollman -6:00 Canada C%sT 16922742Swollman 16938029Swollman 169417200Swollman# Saskatchewan 169517200Swollman 1696121098Swollman# From Mark Brader (2003-07-26): 1697121098Swollman# The first actual adoption of DST in Canada was at the municipal 1698121098Swollman# level. As the [Toronto] Star put it (1912-06-07), "While people 1699121098Swollman# elsewhere have long been talking of legislation to save daylight, 1700121098Swollman# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1701121098Swollman# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1702121098Swollman# presumably late evening, as below), and would run until "the end of 1703121098Swollman# the summer". The discrepancy between municipal time and railroad 1704121098Swollman# time was noted. 1705121098Swollman 1706121098Swollman# From Paul Eggert (2003-07-27): 1707121098Swollman# Willett (1914-03) notes that DST "has been in operation ... in the 1708121098Swollman# City of Moose Jaw, Saskatchewan, for one year." 1709121098Swollman 1710158421Swollman# From Paul Eggert (2006-03-22): 1711158421Swollman# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 171217200Swollman# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 171317200Swollman# Other western towns (e.g. Lloydminster) are like Edmonton. 171467578Swollman# Matthews and Vincent (1998) write that Denare Beach and Creighton 171567578Swollman# are like Winnipeg, in violation of Saskatchewan law. 171617200Swollman 1717149514Swollman# From W. Jones (1992-11-06): 171817200Swollman# The. . .below is based on information I got from our law library, the 171917200Swollman# provincial archives, and the provincial Community Services department. 172017200Swollman# A precise history would require digging through newspaper archives, and 172117200Swollman# since you didn't say what you wanted, I didn't bother. 172217200Swollman# 172317200Swollman# Saskatchewan is split by a time zone meridian (105W) and over the years 172417200Swollman# the boundary became pretty ragged as communities near it reevaluated 172517200Swollman# their affiliations in one direction or the other. In 1965 a provincial 172617200Swollman# referendum favoured legislating common time practices. 172717200Swollman# 172817200Swollman# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 172917200Swollman# Saskatchewan 1978) was proclaimed, and established that the eastern 173017200Swollman# part of Saskatchewan would use CST year round, that districts in 173117200Swollman# northwest Saskatchewan would by default follow CST but could opt to 173217200Swollman# follow Mountain Time rules (thus 1 hour difference in the winter and 173317200Swollman# zero in the summer), and that districts in southwest Saskatchewan would 173417200Swollman# by default follow MT but could opt to follow CST. 173517200Swollman# 173617200Swollman# It took a few years for the dust to settle (I know one story of a town 173717200Swollman# on one time zone having its school in another, such that a mom had to 173817200Swollman# serve her family lunch in two shifts), but presently it seems that only 173917200Swollman# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 174017200Swollman# rules any more; all other districts appear to have used CST year round 174117200Swollman# since sometime in the 1960s. 174217200Swollman 1743163302Sru# From Chris Walton (2006-06-26): 1744163302Sru# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1745163302Sru# long and rather painful to read. 1746163302Sru# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1747163302Sru 17482742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17492742SwollmanRule Regina 1918 only - Apr 14 2:00 1:00 D 1750233447SedwinRule Regina 1918 only - Oct 27 2:00 0 S 17512742SwollmanRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 17522742SwollmanRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 17532742SwollmanRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 17542742SwollmanRule Regina 1937 only - Oct Sun>=8 0:00 0 S 17552742SwollmanRule Regina 1938 only - Oct Sun>=1 0:00 0 S 17562742SwollmanRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1757121098SwollmanRule Regina 1942 only - Feb 9 2:00 1:00 W # War 1758121098SwollmanRule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 17592742SwollmanRule Regina 1945 only - Sep lastSun 2:00 0 S 176017200SwollmanRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 176117200SwollmanRule Regina 1946 only - Oct Sun>=8 2:00 0 S 1762121098SwollmanRule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1763121098SwollmanRule Regina 1947 1957 - Sep lastSun 2:00 0 S 1764121098SwollmanRule Regina 1959 only - Apr lastSun 2:00 1:00 D 176517200SwollmanRule Regina 1959 only - Oct lastSun 2:00 0 S 176617200Swollman# 176717200SwollmanRule Swift 1957 only - Apr lastSun 2:00 1:00 D 176817200SwollmanRule Swift 1957 only - Oct lastSun 2:00 0 S 176917200SwollmanRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 177017200SwollmanRule Swift 1959 only - Oct lastSun 2:00 0 S 177117200SwollmanRule Swift 1960 1961 - Sep lastSun 2:00 0 S 17722742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 177317200SwollmanZone America/Regina -6:58:36 - LMT 1905 Sep 177417200Swollman -7:00 Regina M%sT 1960 Apr lastSun 2:00 17752742Swollman -6:00 - CST 177617200SwollmanZone America/Swift_Current -7:11:20 - LMT 1905 Sep 177717200Swollman -7:00 Canada M%sT 1946 Apr lastSun 2:00 177817200Swollman -7:00 Regina M%sT 1950 177917200Swollman -7:00 Swift M%sT 1972 Apr lastSun 2:00 178017200Swollman -6:00 - CST 17812742Swollman 17828029Swollman 178317200Swollman# Alberta 178417200Swollman 17852742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17862742SwollmanRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1787233447SedwinRule Edm 1918 only - Oct 27 2:00 0 S 17882742SwollmanRule Edm 1919 only - May 27 2:00 0 S 17892742SwollmanRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 17902742SwollmanRule Edm 1920 only - Oct lastSun 2:00 0 S 17912742SwollmanRule Edm 1921 1923 - Sep lastSun 2:00 0 S 1792121098SwollmanRule Edm 1942 only - Feb 9 2:00 1:00 W # War 1793121098SwollmanRule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 17942742SwollmanRule Edm 1945 only - Sep lastSun 2:00 0 S 17952742SwollmanRule Edm 1947 only - Apr lastSun 2:00 1:00 D 17962742SwollmanRule Edm 1947 only - Sep lastSun 2:00 0 S 17972742SwollmanRule Edm 1967 only - Apr lastSun 2:00 1:00 D 17982742SwollmanRule Edm 1967 only - Oct lastSun 2:00 0 S 17992742SwollmanRule Edm 1969 only - Apr lastSun 2:00 1:00 D 18002742SwollmanRule Edm 1969 only - Oct lastSun 2:00 0 S 18012742SwollmanRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1802158421SwollmanRule Edm 1972 2006 - Oct lastSun 2:00 0 S 18032742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18042742SwollmanZone America/Edmonton -7:33:52 - LMT 1906 Sep 1805158421Swollman -7:00 Edm M%sT 1987 1806158421Swollman -7:00 Canada M%sT 18072742Swollman 18088029Swollman 180917200Swollman# British Columbia 181017200Swollman 1811158421Swollman# From Paul Eggert (2006-03-22): 1812158421Swollman# Shanks & Pottenger write that since 1970 most of this region has 1813158421Swollman# been like Vancouver. 181458787Sru# Dawson Creek uses MST. Much of east BC is like Edmonton. 181567578Swollman# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 181617200Swollman 1817233447Sedwin# It seems though that (re: Creston) is not entirely correct: 1818233447Sedwin 1819233447Sedwin# From Chris Walton (2011-12-01): 1820233447Sedwin# There are two areas within the Canadian province of British Columbia 1821233447Sedwin# that do not currently observe daylight saving: 1822233447Sedwin# a) The Creston Valley (includes the town of Creston and surrounding area) 1823233447Sedwin# b) The eastern half of the Peace River Regional District 1824233447Sedwin# (includes the cities of Dawson Creek and Fort St. John) 1825233447Sedwin 1826233447Sedwin# Earlier this year I stumbled across a detailed article about the time 1827233447Sedwin# keeping history of Creston; it was written by Tammy Hardwick who is the 1828233447Sedwin# manager of the Creston & District Museum. The article was written in May 2009. 1829233447Sedwin# <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260"> 1830233447Sedwin# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1831233447Sedwin# </a> 1832233447Sedwin# According to the article, Creston has not changed its clocks since June 1918. 1833233447Sedwin# i.e. Creston has been stuck on UTC-7 for 93 years. 1834233447Sedwin# Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1835233447Sedwin 1836233447Sedwin# Unfortunately the exact date for the time change in June 1918 remains 1837233447Sedwin# unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1838233447Sedwin# ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1839233447Sedwin# as plausible as any other date (in June). She also said that after writing the 1840233447Sedwin# article she had discovered another time change in 1916; this is the subject 1841233447Sedwin# of another article which she wrote in October 2010. 1842233447Sedwin# <a href="http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56"> 1843233447Sedwin# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1844233447Sedwin# </a> 1845233447Sedwin 1846233447Sedwin# Here is a summary of the three clock change events in Creston's history: 1847233447Sedwin# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1848233447Sedwin# Exact date unknown 1849240461Sedwin# 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1850233447Sedwin# Exact date in October unknown; Sunday October 1 is a reasonable guess. 1851233447Sedwin# 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1852233447Sedwin# Exact date in June unknown; Sunday June 2 is a reasonable guess. 1853233447Sedwin# note#1: 1854233447Sedwin# On Oct 27/1918 when daylight saving ended in the rest of Canada, 1855233447Sedwin# Creston did not change its clocks. 1856233447Sedwin# note#2: 1857233447Sedwin# During WWII when the Federal Government legislated a mandatory clock change, 1858233447Sedwin# Creston did not oblige. 1859233447Sedwin# note#3: 1860233447Sedwin# There is no guarantee that Creston will remain on Mountain Standard Time 1861233447Sedwin# (UTC-7) forever. 1862233447Sedwin# The subject was debated at least once this year by the town Council. 1863233447Sedwin# <a href="http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html"> 1864233447Sedwin# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1865233447Sedwin# </a> 1866233447Sedwin 1867233447Sedwin# During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1868233447Sedwin# In Creston, that was handled by shifting the area to PST (-8:00) then applying 1869233447Sedwin# summer time to cause the offset to be -7:00, the same as it had been before 1870233447Sedwin# the change. It can be argued that the timezone abbreviation during this 1871233447Sedwin# period should be PDT rather than MST, but that doesn't seem important enough 1872233447Sedwin# (to anyone) to further complicate the rules. 1873233447Sedwin 1874233447Sedwin# The transition dates (and times) are guesses. 1875233447Sedwin 18762742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 18772742SwollmanRule Vanc 1918 only - Apr 14 2:00 1:00 D 1878233447SedwinRule Vanc 1918 only - Oct 27 2:00 0 S 1879121098SwollmanRule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1880121098SwollmanRule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 18812742SwollmanRule Vanc 1945 only - Sep 30 2:00 0 S 18822742SwollmanRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 18832742SwollmanRule Vanc 1946 only - Oct 13 2:00 0 S 18842742SwollmanRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1885158421SwollmanRule Vanc 1962 2006 - Oct lastSun 2:00 0 S 18862742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18872742SwollmanZone America/Vancouver -8:12:28 - LMT 1884 1888158421Swollman -8:00 Vanc P%sT 1987 1889158421Swollman -8:00 Canada P%sT 189017200SwollmanZone America/Dawson_Creek -8:00:56 - LMT 1884 189117200Swollman -8:00 Canada P%sT 1947 189217200Swollman -8:00 Vanc P%sT 1972 Aug 30 2:00 189317200Swollman -7:00 - MST 1894233447SedwinZone America/Creston -7:46:04 - LMT 1884 1895233447Sedwin -7:00 - MST 1916 Oct 1 1896233447Sedwin -8:00 - PST 1918 Jun 2 1897233447Sedwin -7:00 - MST 18982742Swollman 189958787Sru# Northwest Territories, Nunavut, Yukon 190017200Swollman 1901158421Swollman# From Paul Eggert (2006-03-22): 190217200Swollman# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1903149514Swollman# Mathew Englander (1996-10-07) gives the following refs: 190420094Swollman# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 190520094Swollman# c. 7 defines Yukon standard time as UTC-9. This is still valid; 190620094Swollman# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 190720094Swollman# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 190820094Swollman# * O.I.C. 1980/02 established DST. 190920094Swollman# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1910158421Swollman# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1911158421Swollman# with Englander. 1912163302Sru# From Chris Walton (2006-06-26): 1913163302Sru# Here is a link to the old daylight saving portion of the interpretation 1914163302Sru# act which was last updated in 1987: 1915163302Sru# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf 191617200Swollman 191758787Sru# From Rives McDow (1999-09-04): 191858787Sru# Nunavut ... moved ... to incorporate the whole territory into one time zone. 191958787Sru# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 192058787Sru# Nunavut moves to single time zone Oct. 31 192158787Sru# </a> 192258787Sru# 192358787Sru# From Antoine Leca (1999-09-06): 192458787Sru# We then need to create a new timezone for the Kitikmeot region of Nunavut 192558787Sru# to differentiate it from the Yellowknife region. 192658787Sru 192758787Sru# From Paul Eggert (1999-09-20): 192858787Sru# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 192958787Sru# Basic Facts: The New Territory 193086222Swollman# </a> (1999) reports that Pangnirtung operates on eastern time, 193158787Sru# and that Coral Harbour does not observe DST. We don't know when 193286222Swollman# Pangnirtung switched to eastern time; we'll guess 1995. 193358787Sru 193458787Sru# From Rives McDow (1999-11-08): 193558787Sru# On October 31, when the rest of Nunavut went to Central time, 193658787Sru# Pangnirtung wobbled. Here is the result of their wobble: 193758787Sru# 193858787Sru# The following businesses and organizations in Pangnirtung use Central Time: 193958787Sru# 194058787Sru# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 194158787Sru# Eastern Arctic National Parks, A & D Specialist 194258787Sru# 194358787Sru# The following businesses and organizations in Pangnirtung use Eastern Time: 194458787Sru# 194558787Sru# Hamlet office, All other businesses, Both schools, Airport operator 194658787Sru# 194758787Sru# This has made for an interesting situation there, which warranted the news. 194858787Sru# No one there that I spoke with seems concerned, or has plans to 194958787Sru# change the local methods of keeping time, as it evidently does not 195058787Sru# really interfere with any activities or make things difficult locally. 195158787Sru# They plan to celebrate New Year's turn-over twice, one hour apart, 195258787Sru# so it appears that the situation will last at least that long. 195358787Sru# The Nunavut Intergovernmental Affairs hopes that they will "come to 195458787Sru# their senses", but the locals evidently don't see any problem with 195558787Sru# the current state of affairs. 195658787Sru 195758787Sru# From Michaela Rodrigue, writing in the 195858787Sru# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 195958787Sru# Nunatsiaq News (1999-11-19)</a>: 196058787Sru# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 196158787Sru# central - or Nunavut time - for government offices, and eastern time 196258787Sru# for municipal offices and schools.... Igloolik [was similar but then] 196358787Sru# made the switch to central time on Saturday, Nov. 6. 196458787Sru 196567578Swollman# From Paul Eggert (2000-10-02): 196667578Swollman# Matthews and Vincent (1998) say the following, but we lack histories 196767578Swollman# for these potential new Zones. 196875267Swollman# 196967578Swollman# The Canadian Forces station at Alert uses Eastern Time while the 197067578Swollman# handful of residents at the Eureka weather station [in the Central 197167578Swollman# zone] skip daylight savings. Baffin Island, which is crossed by the 197267578Swollman# Central, Eastern and Atlantic Time zones only uses Eastern Time. 197367578Swollman# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 197467578Swollman# Central Time and Southampton Island [in the Central zone] is not 197567578Swollman# required to use daylight savings. 197667578Swollman 197775267Swollman# From 197875267Swollman# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> 197975267Swollman# Nunavut now has two time zones 198075267Swollman# </a> (2000-11-10): 198175267Swollman# The Nunavut government would allow its employees in Kugluktuk and 198275267Swollman# Cambridge Bay to operate on central time year-round, putting them 198375267Swollman# one hour behind the rest of Nunavut for six months during the winter. 198475267Swollman# At the end of October the two communities had rebelled against 198575267Swollman# Nunavut's unified time zone, refusing to shift to eastern time with 198675267Swollman# the rest of the territory for the winter. Cambridge Bay remained on 198775267Swollman# central time, while Kugluktuk, even farther west, reverted to 198875267Swollman# mountain time, which they had used before the advent of Nunavut's 198975267Swollman# unified time zone in 1999. 199075267Swollman# 199175267Swollman# From Rives McDow (2001-01-20), quoting the Nunavut government: 199275267Swollman# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 199375267Swollman 199475267Swollman# From Paul Eggert (2000-12-04): 199575267Swollman# Let's just keep track of the official times for now. 199675267Swollman 199775267Swollman# From Rives McDow (2001-03-07): 199875267Swollman# The premier of Nunavut has issued a ministerial statement advising 199975267Swollman# that effective 2001-04-01, the territory of Nunavut will revert 200075267Swollman# back to three time zones (mountain, central, and eastern). Of the 200175267Swollman# cities in Nunavut, Coral Harbor is the only one that I know of that 200275267Swollman# has said it will not observe dst, staying on EST year round. I'm 200375267Swollman# checking for more info, and will get back to you if I come up with 200475267Swollman# more. 200575267Swollman# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 200675267Swollman 2007149514Swollman# From Gwillim Law (2005-05-21): 2008149514Swollman# According to maps at 2009149514Swollman# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg 2010149514Swollman# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg 2011149514Swollman# (both dated 2003), and 2012149514Swollman# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2013149514Swollman# (from a 1998 Canadian Geographic article), the de facto and de jure time 2014149514Swollman# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2015149514Swollman# round. Using Google, it's easy to find other websites that confirm this. 2016149514Swollman# I wasn't able to find how far back this time regimen goes, but since it 2017149514Swollman# predates the creation of Nunavut, it probably goes back many years.... 2018149514Swollman# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2019149514Swollman# 2020149514Swollman# From Paul Eggert (2005-07-26): 2021149514Swollman# For lack of better information, assume that Southampton Island observed 2022149514Swollman# daylight saving only during wartime. 2023149514Swollman 2024169811Swollman# From Chris Walton (2007-03-01): 2025169811Swollman# ... the community of Resolute (located on Cornwallis Island in 2026169811Swollman# Nunavut) moved from Central Time to Eastern Time last November. 2027169811Swollman# Basically the community did not change its clocks at the end of 2028169811Swollman# daylight saving.... 2029169811Swollman# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2030163302Sru 2031226298Sedwin# From Chris Walton (2011-03-21): 2032226298Sedwin# Back in 2007 I initiated the creation of a new "zone file" for Resolute 2033226298Sedwin# Bay. Resolute Bay is a small community located about 900km north of 2034226298Sedwin# the Arctic Circle. The zone file was required because Resolute Bay had 2035226298Sedwin# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2036169811Swollman# 2037226298Sedwin# According to new information which I received last week, Resolute Bay 2038226298Sedwin# went back to using UTC-6 in the winter of 2007-2008... 2039226298Sedwin# 2040226298Sedwin# On March 11/2007 most of Canada went onto daylight saving. On March 2041226298Sedwin# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2042226298Sedwin# talked to somebody that was both knowledgeable and helpful. I was able 2043226298Sedwin# to confirm that Resolute Bay was still operating on UTC-5. It was 2044226298Sedwin# explained to me that Resolute Bay had been on the Eastern Time zone 2045226298Sedwin# (EST) in the winter, and was now back on the Central Time zone (CDT). 2046226298Sedwin# i.e. the time zone had changed twice in the last year but the clocks 2047226298Sedwin# had not moved. The residents had to know which time zone they were in 2048226298Sedwin# so they could follow the correct TV schedule... 2049226298Sedwin# 2050226298Sedwin# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2051226298Sedwin# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2052226298Sedwin# of the phone call, I decided to seek out an alternate source of 2053226298Sedwin# information. I found an e-mail address for somebody by the name of 2054226298Sedwin# Stephanie Adams whose job was listed as "Inns North Support Officer for 2055226298Sedwin# Arctic Co-operatives." I was under the impression that Stephanie lived 2056226298Sedwin# and worked in Resolute Bay... 2057226298Sedwin# 2058226298Sedwin# On March 14/2011 I phoned the hamlet office again. I was told that 2059226298Sedwin# Resolute Bay had been using Central Standard Time over the winter of 2060226298Sedwin# 2010-2011 and that the clocks had therefore been moved one hour ahead 2061226298Sedwin# on March 13/2011. The person I talked to was aware that Resolute Bay 2062226298Sedwin# had previously experimented with Eastern Standard Time but he could not 2063226298Sedwin# tell me when the practice had stopped. 2064226298Sedwin# 2065226298Sedwin# On March 17/2011 I searched the Web to find an e-mail address of 2066226298Sedwin# somebody that might be able to tell me exactly when Resolute Bay went 2067226298Sedwin# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2068226298Sedwin# used to be the mayor of Resolute Bay and he apparently owns half the 2069226298Sedwin# businesses including "South Camp Inn." This website has some info on 2070226298Sedwin# Aziz: 2071226298Sedwin# <a href="http://www.uphere.ca/node/493"> 2072226298Sedwin# http://www.uphere.ca/node/493 2073226298Sedwin# </a> 2074226298Sedwin# 2075226298Sedwin# I sent Aziz an e-mail asking when Resolute Bay had stopped using 2076226298Sedwin# Eastern Standard Time. 2077226298Sedwin# 2078226298Sedwin# Aziz responded quickly with this: "hi, The time was not changed for the 2079226298Sedwin# 1 year only, the following year, the community went back to the old way 2080226298Sedwin# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2081226298Sedwin# the winter Zulu plus 6 hrs" 2082226298Sedwin# 2083226298Sedwin# This of course conflicted with everything I had ascertained in November 2008. 2084226298Sedwin# 2085226298Sedwin# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2086226298Sedwin# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2087226298Sedwin# may want to check with the weather office in Resolute Bay or do a 2088226298Sedwin# search on the weather through Env. Canada. web site" 2089226298Sedwin# 2090226298Sedwin# If I had realized the Stephanie did not live in Resolute Bay I would 2091226298Sedwin# never have contacted her. I now believe that all the information I 2092226298Sedwin# obtained in November 2008 should be ignored... 2093226298Sedwin# I apologize for reporting incorrect information in 2008. 2094169811Swollman 20952742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 209617200SwollmanRule NT_YK 1918 only - Apr 14 2:00 1:00 D 209717200SwollmanRule NT_YK 1918 only - Oct 27 2:00 0 S 209817200SwollmanRule NT_YK 1919 only - May 25 2:00 1:00 D 209917200SwollmanRule NT_YK 1919 only - Nov 1 0:00 0 S 2100121098SwollmanRule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2101121098SwollmanRule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 210217200SwollmanRule NT_YK 1945 only - Sep 30 2:00 0 S 210317200SwollmanRule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 210417200SwollmanRule NT_YK 1965 only - Oct lastSun 2:00 0 S 210517200SwollmanRule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2106158421SwollmanRule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2107158421SwollmanRule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 21082742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2109169811Swollman# aka Panniqtuuq 2110169811SwollmanZone America/Pangnirtung 0 - zzz 1921 # trading post est. 211158787Sru -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 211258787Sru -5:00 Canada E%sT 1999 Oct 31 2:00 211375267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 211475267Swollman -5:00 Canada E%sT 2115169811Swollman# formerly Frobisher Bay 2116169811SwollmanZone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 211758787Sru -5:00 NT_YK 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# aka Qausuittuq 2121169811SwollmanZone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 212275267Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 212375267Swollman -5:00 - EST 2001 Apr 1 3:00 2124169811Swollman -6:00 Canada C%sT 2006 Oct 29 2:00 2125226298Sedwin -5:00 - EST 2007 Mar 11 3:00 2126226298Sedwin -6:00 Canada C%sT 2127169811Swollman# aka Kangiqiniq 2128169811SwollmanZone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 2129169811Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 2130169811Swollman -5:00 - EST 2001 Apr 1 3:00 213158787Sru -6:00 Canada C%sT 2132169811Swollman# aka Iqaluktuuttiaq 2133169811SwollmanZone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 213458787Sru -7:00 NT_YK M%sT 1999 Oct 31 2:00 213575267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 213675267Swollman -5:00 - EST 2000 Nov 5 0:00 213775267Swollman -6:00 - CST 2001 Apr 1 3:00 213875267Swollman -7:00 Canada M%sT 2139169811SwollmanZone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 2140158421Swollman -7:00 NT_YK M%sT 1980 2141158421Swollman -7:00 Canada M%sT 2142169811SwollmanZone America/Inuvik 0 - zzz 1953 # Inuvik founded 214317200Swollman -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2144158421Swollman -7:00 NT_YK M%sT 1980 2145158421Swollman -7:00 Canada M%sT 21462742SwollmanZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 214717200Swollman -9:00 NT_YK Y%sT 1966 Jul 1 2:00 2148158421Swollman -8:00 NT_YK P%sT 1980 2149158421Swollman -8:00 Canada P%sT 215017200SwollmanZone America/Dawson -9:17:40 - LMT 1900 Aug 20 215120094Swollman -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2152158421Swollman -8:00 NT_YK P%sT 1980 2153158421Swollman -8:00 Canada P%sT 21542742Swollman 21558029Swollman 21562742Swollman############################################################################### 21572742Swollman 21582742Swollman# Mexico 21592742Swollman 216075267Swollman# From Paul Eggert (2001-03-05): 216175267Swollman# The Investigation and Analysis Service of the 216275267Swollman# Mexican Library of Congress (MLoC) has published a 216375267Swollman# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> 216475267Swollman# history of Mexican local time (in Spanish) 216575267Swollman# </a>. 21662742Swollman# 2167158421Swollman# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 216875267Swollman# (In all cases we go with the MLoC.) 2169158421Swollman# S&P report that Baja was at -8:00 in 1922/1923. 2170158421Swollman# S&P say the 1930 transition in Baja was 1930-11-16. 2171158421Swollman# S&P report no DST during summer 1931. 2172158421Swollman# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 21732742Swollman 217475267Swollman# From Gwillim Law (2001-02-20): 217575267Swollman# There are some other discrepancies between the Decrees page and the 217675267Swollman# tz database. I think they can best be explained by supposing that 217775267Swollman# the researchers who prepared the Decrees page failed to find some of 217875267Swollman# the relevant documents. 217975267Swollman 2180149514Swollman# From Alan Perry (1996-02-15): 218117200Swollman# A guy from our Mexico subsidiary finally found the Presidential Decree 218217200Swollman# outlining the timezone changes in Mexico. 218358787Sru# 218417200Swollman# ------------- Begin Forwarded Message ------------- 218558787Sru# 218617200Swollman# I finally got my hands on the Official Presidential Decree that sets up the 218717200Swollman# rules for the DST changes. The rules are: 218858787Sru# 218917200Swollman# 1. The country is divided in 3 timezones: 219017200Swollman# - Baja California Norte (the Mexico/BajaNorte TZ) 219117200Swollman# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 219217200Swollman# - The rest of the country (the Mexico/General TZ) 219358787Sru# 219417200Swollman# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 219517200Swollman# at 2:00 AM, the times in each zone are as follows: 219617200Swollman# BajaNorte: GMT+7 219717200Swollman# BajaSur: GMT+6 219817200Swollman# General: GMT+5 219958787Sru# 220017200Swollman# 3. The rest of the year, the times are as follows: 220117200Swollman# BajaNorte: GMT+8 220217200Swollman# BajaSur: GMT+7 220317200Swollman# General: GMT+6 220458787Sru# 220517200Swollman# The Decree was published in Mexico's Official Newspaper on January 4th. 220658787Sru# 220717200Swollman# -------------- End Forwarded Message -------------- 220817200Swollman# From Paul Eggert (1996-06-12): 220943014Swollman# For an English translation of the decree, see 221043014Swollman# <a href="http://mexico-travel.com/extra/timezone_eng.html"> 221143014Swollman# ``Diario Oficial: Time Zone Changeover'' (1996-01-04). 221243014Swollman# </a> 221314343Swollman 221443543Swollman# From Rives McDow (1998-10-08): 221543543Swollman# The State of Quintana Roo has reverted back to central STD and DST times 221643543Swollman# (i.e. UTC -0600 and -0500 as of 1998-08-02). 221743543Swollman 221858787Sru# From Rives McDow (2000-01-10): 221958787Sru# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 222058787Sru# zone 5 hours from the International Date Line, and will not observe daylight 222158787Sru# savings time so as to stay on the same time zone as the southern part of 222258787Sru# Arizona year round. 222358787Sru 222475267Swollman# From Jesper Norgaard, translating 222575267Swollman# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 222675267Swollman# In Oaxaca, the 55.000 teachers from the Section 22 of the National 222775267Swollman# Syndicate of Education Workers, refuse to apply daylight saving each 222875267Swollman# year, so that the more than 10,000 schools work at normal hour the 222975267Swollman# whole year. 223075267Swollman 223175267Swollman# From Gwillim Law (2001-01-19): 223275267Swollman# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 223375267Swollman# (translated):... 223475267Swollman# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 223575267Swollman# that Summer Time will be reduced from seven to five months, starting 223675267Swollman# this year.... 223775267Swollman# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 223875267Swollman# [translated], says "summer time will ... take effect on the first Sunday 223975267Swollman# in May, and end on the last Sunday of September. 224075267Swollman 224175267Swollman# From Arthur David Olson (2001-01-25): 224275267Swollman# The 2001-01-24 traditional Washington Post contained the page one 224375267Swollman# story "Timely Issue Divides Mexicans."... 224475267Swollman# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 224575267Swollman# ... Mexico City Mayor Lopez Obrador "...is threatening to keep 224675267Swollman# Mexico City and its 20 million residents on a different time than 224775267Swollman# the rest of the country..." In particular, Lopez Obrador would abolish 224875267Swollman# observation of Daylight Saving Time. 224975267Swollman 225075267Swollman# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> 225175267Swollman# Official statute published by the Energy Department 225275267Swollman# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 225375267Swollman# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). 225475267Swollman 225575267Swollman# From Paul Eggert (2001-03-03): 225675267Swollman# 225775267Swollman# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> 225875267Swollman# James F. Smith writes in today's LA Times 225975267Swollman# </a> 226075267Swollman# * Sonora will continue to observe standard time. 226175267Swollman# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that 226275267Swollman# the Federal District will not adopt DST. 226375267Swollman# * 4 of 16 district leaders announced they'll ignore the decree. 226475267Swollman# * The decree does not affect federal-controlled facilities including 226575267Swollman# the airport, banks, hospitals, and schools. 226675267Swollman# 226775267Swollman# For now we'll assume that the Federal District will bow to federal rules. 226875267Swollman 226975267Swollman# From Jesper Norgaard (2001-04-01): 227075267Swollman# I found some references to the Mexican application of daylight 227175267Swollman# saving, which modifies what I had already sent you, stating earlier 227275267Swollman# that a number of northern Mexican states would go on daylight 227375267Swollman# saving. The modification reverts this to only cover Baja California 227475267Swollman# (Norte), while all other states (except Sonora, who has no daylight 227575267Swollman# saving all year) will follow the original decree of president 227675267Swollman# Vicente Fox, starting daylight saving May 6, 2001 and ending 227775267Swollman# September 30, 2001. 227875267Swollman# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> 227975267Swollman# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 228075267Swollman 228186222Swollman# From Reuters (2001-09-04): 228286222Swollman# Mexico's Supreme Court on Tuesday declared that daylight savings was 228386222Swollman# unconstitutional in Mexico City, creating the possibility the 228486222Swollman# capital will be in a different time zone from the rest of the nation 228586222Swollman# next year.... The Supreme Court's ruling takes effect at 2:00 228686222Swollman# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 228786222Swollman# standard time. "This is so residents of the Federal District are not 228886222Swollman# subject to unexpected time changes," a statement from the court said. 228986222Swollman 229093799Swollman# From Jesper Norgaard Welen (2002-03-12): 229193799Swollman# ... consulting my local grocery store(!) and my coworkers, they all insisted 229293799Swollman# that a new decision had been made to reinstate US style DST in Mexico.... 229393799Swollman# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 229493799Swollman# confirms this. Sonora as usual is the only state where DST is not applied. 229593799Swollman 2296203019Sedwin# From Steffen Thorsen (2009-12-28): 2297203019Sedwin# 2298203019Sedwin# Steffen Thorsen wrote: 2299203019Sedwin# > Mexico's House of Representatives has approved a proposal for northern 2300203019Sedwin# > Mexico's border cities to share the same daylight saving schedule as 2301203019Sedwin# > the United States. 2302203019Sedwin# Now this has passed both the Congress and the Senate, so starting from 2303203019Sedwin# 2010, some border regions will be the same: 2304203019Sedwin# <a href="http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/"> 2305203019Sedwin# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2306203019Sedwin# </a> 2307203019Sedwin# <a href="http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939"> 2308203019Sedwin# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2309203019Sedwin# </a> 2310203019Sedwin# (Spanish) 2311203019Sedwin# 2312203019Sedwin# Could not find the new law text, but the proposed law text changes are here: 2313203019Sedwin# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf"> 2314203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2315203019Sedwin# </a> 2316203019Sedwin# (Gaceta Parlamentaria) 2317203019Sedwin# 2318203019Sedwin# There is also a list of the votes here: 2319203019Sedwin# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html"> 2320203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2321203019Sedwin# </a> 2322203019Sedwin# 2323203019Sedwin# Our page: 2324203019Sedwin# <a href="http://www.timeanddate.com/news/time/north-mexico-dst-change.html"> 2325203019Sedwin# http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2326203019Sedwin# </a> 2327203019Sedwin 2328203019Sedwin# From Arthur David Olson (2010-01-20): 2329203019Sedwin# The page 2330203019Sedwin# <a href="http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010"> 2331203019Sedwin# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2332203019Sedwin# </a> 2333203019Sedwin# includes this text: 2334203019Sedwin# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2335203019Sedwin# Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2336203019Sedwin# Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2337203019Sedwin# Tamaulipas, la aplicación de este horario estacional surtirá efecto 2338203019Sedwin# desde las dos horas del segundo domingo de marzo y concluirá a las dos 2339203019Sedwin# horas del primer domingo de noviembre. 2340203019Sedwin# En los municipios fronterizos que se encuentren ubicados en la franja 2341203019Sedwin# fronteriza norte en el territorio comprendido entre la línea 2342203019Sedwin# internacional y la línea paralela ubicada a una distancia de veinte 2343203019Sedwin# kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2344203019Sedwin# interior del país, la aplicación de este horario estacional surtirá 2345203019Sedwin# efecto desde las dos horas del segundo domingo de marzo y concluirá a 2346203019Sedwin# las dos horas del primer domingo de noviembre. 2347203019Sedwin 23482742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 23492742SwollmanRule Mexico 1939 only - Feb 5 0:00 1:00 D 23502742SwollmanRule Mexico 1939 only - Jun 25 0:00 0 S 23512742SwollmanRule Mexico 1940 only - Dec 9 0:00 1:00 D 23522742SwollmanRule Mexico 1941 only - Apr 1 0:00 0 S 2353121098SwollmanRule Mexico 1943 only - Dec 16 0:00 1:00 W # War 23542742SwollmanRule Mexico 1944 only - May 1 0:00 0 S 23552742SwollmanRule Mexico 1950 only - Feb 12 0:00 1:00 D 23562742SwollmanRule Mexico 1950 only - Jul 30 0:00 0 S 235775267SwollmanRule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 235875267SwollmanRule Mexico 1996 2000 - Oct lastSun 2:00 0 S 235993799SwollmanRule Mexico 2001 only - May Sun>=1 2:00 1:00 D 236093799SwollmanRule Mexico 2001 only - Sep lastSun 2:00 0 S 236193799SwollmanRule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 236293799SwollmanRule Mexico 2002 max - Oct lastSun 2:00 0 S 23632742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 236443014Swollman# Quintana Roo 236558787SruZone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 236675267Swollman -6:00 - CST 1981 Dec 23 236743543Swollman -5:00 Mexico E%sT 1998 Aug 2 2:00 236843543Swollman -6:00 Mexico C%sT 236964499Swollman# Campeche, Yucatan 237064499SwollmanZone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 237175267Swollman -6:00 - CST 1981 Dec 23 237264499Swollman -5:00 - EST 1982 Dec 2 237364499Swollman -6:00 Mexico C%sT 2374203019Sedwin# Coahuila, Durango, Nuevo Leon, Tamaulipas (near US border) 2375203019SedwinZone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2376203019Sedwin -6:00 - CST 1988 2377203019Sedwin -6:00 US C%sT 1989 2378203019Sedwin -6:00 Mexico C%sT 2010 2379203019Sedwin -6:00 US C%sT 2380203019Sedwin# Coahuila, Durango, Nuevo Leon, Tamaulipas (away from US border) 238175267SwollmanZone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 238264499Swollman -6:00 - CST 1988 238364499Swollman -6:00 US C%sT 1989 238464499Swollman -6:00 Mexico C%sT 238543014Swollman# Central Mexico 2386203019SedwinZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 23872742Swollman -7:00 - MST 1927 Jun 10 23:00 23882742Swollman -6:00 - CST 1930 Nov 15 23892742Swollman -7:00 - MST 1931 May 1 23:00 23902742Swollman -6:00 - CST 1931 Oct 239175267Swollman -7:00 - MST 1932 Apr 1 239286222Swollman -6:00 Mexico C%sT 2001 Sep 30 02:00 239393799Swollman -6:00 - CST 2002 Feb 20 239493799Swollman -6:00 Mexico C%sT 2395203019Sedwin# Chihuahua (near US border) 2396203019SedwinZone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2397203019Sedwin -7:00 - MST 1927 Jun 10 23:00 2398203019Sedwin -6:00 - CST 1930 Nov 15 2399203019Sedwin -7:00 - MST 1931 May 1 23:00 2400203019Sedwin -6:00 - CST 1931 Oct 2401203019Sedwin -7:00 - MST 1932 Apr 1 2402203019Sedwin -6:00 - CST 1996 2403203019Sedwin -6:00 Mexico C%sT 1998 2404203019Sedwin -6:00 - CST 1998 Apr Sun>=1 3:00 2405203019Sedwin -7:00 Mexico M%sT 2010 2406203019Sedwin -7:00 US M%sT 2407203019Sedwin# Chihuahua (away from US border) 240858787SruZone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 240943014Swollman -7:00 - MST 1927 Jun 10 23:00 241043014Swollman -6:00 - CST 1930 Nov 15 241143014Swollman -7:00 - MST 1931 May 1 23:00 241243014Swollman -6:00 - CST 1931 Oct 241375267Swollman -7:00 - MST 1932 Apr 1 241443014Swollman -6:00 - CST 1996 241543014Swollman -6:00 Mexico C%sT 1998 241643014Swollman -6:00 - CST 1998 Apr Sun>=1 3:00 241743014Swollman -7:00 Mexico M%sT 241858787Sru# Sonora 241958787SruZone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 242058787Sru -7:00 - MST 1927 Jun 10 23:00 242158787Sru -6:00 - CST 1930 Nov 15 242258787Sru -7:00 - MST 1931 May 1 23:00 242358787Sru -6:00 - CST 1931 Oct 242475267Swollman -7:00 - MST 1932 Apr 1 242564499Swollman -6:00 - CST 1942 Apr 24 242658787Sru -7:00 - MST 1949 Jan 14 242758787Sru -8:00 - PST 1970 242858787Sru -7:00 Mexico M%sT 1999 242958787Sru -7:00 - MST 2430207898Sedwin 2431207898Sedwin# From Alexander Krivenyshev (2010-04-21): 2432207898Sedwin# According to news, Bahía de Banderas (Mexican state of Nayarit) 2433207898Sedwin# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2434207898Sedwin# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2435207898Sedwin# 2436207898Sedwin# (Spanish) 2437207898Sedwin# Bahía de Banderas homologa su horario al del centro del 2438207898Sedwin# país, a partir de este domingo 2439207898Sedwin# <a href="http://www.nayarit.gob.mx/notes.asp?id=20748"> 2440207898Sedwin# http://www.nayarit.gob.mx/notes.asp?id=20748 2441207898Sedwin# </a> 2442207898Sedwin# 2443207898Sedwin# Bahía de Banderas homologa su horario con el del Centro del 2444207898Sedwin# País 2445207898Sedwin# <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"> 2446207898Sedwin# 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" 2447207898Sedwin# </a> 2448207898Sedwin# 2449207898Sedwin# (English) 2450207898Sedwin# Puerto Vallarta and Bahía de Banderas: One Time Zone 2451207898Sedwin# <a href="http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml"> 2452207898Sedwin# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2453207898Sedwin# </a> 2454207898Sedwin# 2455207898Sedwin# or 2456207898Sedwin# <a href="http://www.worldtimezone.com/dst_news/dst_news_mexico08.html"> 2457207898Sedwin# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2458207898Sedwin# </a> 2459207898Sedwin# 2460207898Sedwin# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2461207898Sedwin# will allow Bahía de Banderas and Puerto Vallarta to share the same time 2462207898Sedwin# zone ..." 246364499Swollman# Baja California Sur, Nayarit, Sinaloa 2464207898Sedwin 2465207898Sedwin# From Arthur David Olson (2010-05-01): 2466207898Sedwin# Use "Bahia_Banderas" to keep the name to fourteen characters. 2467207898Sedwin 24682742SwollmanZone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 24692742Swollman -7:00 - MST 1927 Jun 10 23:00 24702742Swollman -6:00 - CST 1930 Nov 15 24712742Swollman -7:00 - MST 1931 May 1 23:00 24722742Swollman -6:00 - CST 1931 Oct 247375267Swollman -7:00 - MST 1932 Apr 1 247464499Swollman -6:00 - CST 1942 Apr 24 24752742Swollman -7:00 - MST 1949 Jan 14 24762742Swollman -8:00 - PST 1970 247714343Swollman -7:00 Mexico M%sT 2478207898Sedwin 2479207898SedwinZone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2480207898Sedwin -7:00 - MST 1927 Jun 10 23:00 2481207898Sedwin -6:00 - CST 1930 Nov 15 2482207898Sedwin -7:00 - MST 1931 May 1 23:00 2483207898Sedwin -6:00 - CST 1931 Oct 2484207898Sedwin -7:00 - MST 1932 Apr 1 2485207898Sedwin -6:00 - CST 1942 Apr 24 2486207898Sedwin -7:00 - MST 1949 Jan 14 2487207898Sedwin -8:00 - PST 1970 2488210718Sedwin -7:00 Mexico M%sT 2010 Apr 4 2:00 2489207898Sedwin -6:00 Mexico C%sT 2490207898Sedwin 2491203019Sedwin# Baja California (near US border) 24922742SwollmanZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 249375267Swollman -7:00 - MST 1924 24942742Swollman -8:00 - PST 1927 Jun 10 23:00 249575267Swollman -7:00 - MST 1930 Nov 15 249675267Swollman -8:00 - PST 1931 Apr 1 249775267Swollman -8:00 1:00 PDT 1931 Sep 30 249864499Swollman -8:00 - PST 1942 Apr 24 2499158421Swollman -8:00 1:00 PWT 1945 Aug 14 23:00u 2500158421Swollman -8:00 1:00 PPT 1945 Nov 12 # Peace 250175267Swollman -8:00 - PST 1948 Apr 5 250275267Swollman -8:00 1:00 PDT 1949 Jan 14 250375267Swollman -8:00 - PST 1954 250475267Swollman -8:00 CA P%sT 1961 250575267Swollman -8:00 - PST 1976 250614343Swollman -8:00 US P%sT 1996 250775267Swollman -8:00 Mexico P%sT 2001 250893799Swollman -8:00 US P%sT 2002 Feb 20 2509203019Sedwin -8:00 Mexico P%sT 2010 2510203019Sedwin -8:00 US P%sT 2511203019Sedwin# Baja California (away from US border) 2512203019SedwinZone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2513203019Sedwin -7:00 - MST 1924 2514203019Sedwin -8:00 - PST 1927 Jun 10 23:00 2515203019Sedwin -7:00 - MST 1930 Nov 15 2516203019Sedwin -8:00 - PST 1931 Apr 1 2517203019Sedwin -8:00 1:00 PDT 1931 Sep 30 2518203019Sedwin -8:00 - PST 1942 Apr 24 2519203019Sedwin -8:00 1:00 PWT 1945 Aug 14 23:00u 2520203019Sedwin -8:00 1:00 PPT 1945 Nov 12 # Peace 2521203019Sedwin -8:00 - PST 1948 Apr 5 2522203019Sedwin -8:00 1:00 PDT 1949 Jan 14 2523203019Sedwin -8:00 - PST 1954 2524203019Sedwin -8:00 CA P%sT 1961 2525203019Sedwin -8:00 - PST 1976 2526203019Sedwin -8:00 US P%sT 1996 2527203019Sedwin -8:00 Mexico P%sT 2001 2528203019Sedwin -8:00 US P%sT 2002 Feb 20 252993799Swollman -8:00 Mexico P%sT 2530158421Swollman# From Paul Eggert (2006-03-22): 253175267Swollman# Formerly there was an America/Ensenada zone, which differed from 253275267Swollman# America/Tijuana only in that it did not observe DST from 1976 2533158421Swollman# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2534158421Swollman# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 253575267Swollman# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and 2536158421Swollman# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 253775267Swollman# DST-observance was a town-by-town matter back then. This concerns 253875267Swollman# data after 1970 so most likely there should be at least one Zone 253975267Swollman# other than America/Tijuana for Baja, but it's not clear yet what its 254075267Swollman# name or contents should be. 25412742Swollman# 25422742Swollman# Revillagigedo Is 25432742Swollman# no information 25442742Swollman 25452742Swollman############################################################################### 25462742Swollman 25472742Swollman# Anguilla 25482742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25492742SwollmanZone America/Anguilla -4:12:16 - LMT 1912 Mar 2 25502742Swollman -4:00 - AST 25512742Swollman 25522742Swollman# Antigua and Barbuda 25532742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25542742SwollmanZone America/Antigua -4:07:12 - LMT 1912 Mar 2 25552742Swollman -5:00 - EST 1951 25562742Swollman -4:00 - AST 25572742Swollman 25582742Swollman# Bahamas 2559169811Swollman# 2560248310Sedwin# For 1899 Milne gives -5:09:29.5; round that. 2561248310Sedwin# 2562169811Swollman# From Sue Williams (2006-12-07): 2563169811Swollman# The Bahamas announced about a month ago that they plan to change their DST 2564169811Swollman# rules to sync with the U.S. starting in 2007.... 2565169811Swollman# http://www.jonesbahamas.com/?c=45&a=10412 2566169811Swollman 25672742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2568181421SedwinRule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2569181421SedwinRule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 25702742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2571248310SedwinZone America/Nassau -5:09:30 - LMT 1912 Mar 2 2572169811Swollman -5:00 Bahamas E%sT 1976 2573169811Swollman -5:00 US E%sT 25742742Swollman 25752742Swollman# Barbados 2576248310Sedwin 2577248310Sedwin# For 1899 Milne gives -3:58:29.2; round that. 2578248310Sedwin 25792742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 25802742SwollmanRule Barb 1977 only - Jun 12 2:00 1:00 D 25812742SwollmanRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 25822742SwollmanRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 25832742SwollmanRule Barb 1979 only - Sep 30 2:00 0 S 25842742SwollmanRule Barb 1980 only - Sep 25 2:00 0 S 25852742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2586248310SedwinZone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2587248310Sedwin -3:58:29 - BMT 1932 # Bridgetown Mean Time 25882742Swollman -4:00 Barb A%sT 25892742Swollman 25902742Swollman# Belize 2591158421Swollman# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 25922742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 25932742SwollmanRule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 25942742SwollmanRule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 25952742SwollmanRule Belize 1973 only - Dec 5 0:00 1:00 D 25962742SwollmanRule Belize 1974 only - Feb 9 0:00 0 S 25972742SwollmanRule Belize 1982 only - Dec 18 0:00 1:00 D 25982742SwollmanRule Belize 1983 only - Feb 12 0:00 0 S 25992742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 26002742SwollmanZone America/Belize -5:52:48 - LMT 1912 Apr 26012742Swollman -6:00 Belize C%sT 26022742Swollman 26032742Swollman# Bermuda 2604163302Sru 2605248310Sedwin# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2606248310Sedwin# Bermuda dockyard, Ireland I; round that. 2607248310Sedwin 2608163302Sru# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2609163302Sru 2610163302Sru# Next year, however, clocks in the US will go forward on the second Sunday 2611163302Sru# in March, until the first Sunday in November. And, after the Time Zone 2612163302Sru# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2613163302Sru# Friday, the same thing will happen in Bermuda. 2614163302Sru# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2615163302Sru 26162742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2617248310SedwinZone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 26182742Swollman -4:00 - AST 1974 Apr 28 2:00 2619163302Sru -4:00 Bahamas A%sT 1976 2620163302Sru -4:00 US A%sT 26212742Swollman 26222742Swollman# Cayman Is 26232742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 26242742SwollmanZone America/Cayman -5:25:32 - LMT 1890 # Georgetown 262543014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 26262742Swollman -5:00 - EST 26272742Swollman 26282742Swollman# Costa Rica 2629248310Sedwin 2630248310Sedwin# Milne gives -5:36:13.3 as San Jose mean time; round to nearest. 2631248310Sedwin 26322742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 26332742SwollmanRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 26342742SwollmanRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 263520094SwollmanRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2636158421Swollman# IATA SSIM (1991-09) says the following was at 1:00; 2637158421Swollman# go with Shanks & Pottenger. 263820094SwollmanRule CR 1991 only - Jul 1 0:00 0 S 263920094SwollmanRule CR 1992 only - Mar 15 0:00 0 S 26402742Swollman# There are too many San Joses elsewhere, so we'll use `Costa Rica'. 26412742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2642248310SedwinZone America/Costa_Rica -5:36:13 - LMT 1890 # San Jose 2643248310Sedwin -5:36:13 - SJMT 1921 Jan 15 # San Jose Mean Time 26442742Swollman -6:00 CR C%sT 26452742Swollman# Coco 26462742Swollman# no information; probably like America/Costa_Rica 26472742Swollman 26482742Swollman# Cuba 26492742Swollman 2650248310Sedwin# From Paul Eggert (2013-02-21): 2651248310Sedwin# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2652248310Sedwin# for the port, and -5:30 for meteorological observations. 2653248310Sedwin# For now, stick with Shanks & Pottenger. 2654248310Sedwin 265558787Sru# From Arthur David Olson (1999-03-29): 265658787Sru# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 265758787Sru# the Cuban National Team and the Baltimore Orioles was carried live on 265858787Sru# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 265958787Sru# During the game, play-by-play announcer Jim Hunter noted that 266058787Sru# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 266158787Sru# Time today." (The "two hour" remark referred to losing one hour of 266258787Sru# sleep on 1999-03-28--when the announcers were in Cuba as it switched 266358787Sru# to DST--and one more hour on 1999-04-04--when the announcers will have 266458787Sru# returned to Baltimore, which switches on that date.) 26652742Swollman 2666138323Swollman# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2667138323Swollman# Cuba is not going back to standard time this year. 2668158421Swollman# From Paul Eggert (2006-03-22): 2669138323Swollman# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2670138323Swollman# says that it's due to a problem at the Antonio Guiteras 2671138323Swollman# thermoelectric plant, and says "This October there will be no return 2672138323Swollman# to normal hours (after daylight saving time)". 2673158421Swollman# For now, let's assume that it's a temporary measure. 2674138323Swollman 2675153670Swollman# From Carlos A. Carnero Delgado (2005-11-12): 2676153670Swollman# This year (just like in 2004-2005) there's no change in time zone 2677153670Swollman# adjustment in Cuba. We will stay in daylight saving time: 2678153670Swollman# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2679153670Swollman 2680169811Swollman# From Jesper Norgaard Welen (2006-10-21): 2681169811Swollman# An article in GRANMA INTERNACIONAL claims that Cuba will end 2682169811Swollman# the 3 years of permanent DST next weekend, see 2683169811Swollman# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2684169811Swollman# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2685169811Swollman# watches should be set back one hour -- going back to 00:00 hours -- returning 2686169811Swollman# to the normal schedule.... 2687163302Sru 2688169811Swollman# From Paul Eggert (2007-03-02): 2689169811Swollman# http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday, 2690169811Swollman# says Cuban clocks will advance at midnight on March 10. 2691169811Swollman# For lack of better information, assume Cuba will use US rules, 2692169811Swollman# except that it switches at midnight standard time as usual. 2693173319Sedwin# 2694173319Sedwin# From Steffen Thorsen (2007-10-25): 2695240461Sedwin# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2696173319Sedwin# earlier - on the last Sunday of October, just like in 2006. 2697240461Sedwin# 2698173319Sedwin# He supplied these references: 2699240461Sedwin# 2700173319Sedwin# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2701173319Sedwin# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2702240461Sedwin# 2703173319Sedwin# From Alex Kryvenishev (2007-10-25): 2704173319Sedwin# Here is also article from Granma (Cuba): 2705240461Sedwin# 2706173319Sedwin# [Regira] el Horario Normal desde el [proximo] domingo 28 de octubre 2707173319Sedwin# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2708240461Sedwin# 2709173319Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2710169811Swollman 2711177591Sedwin# From Arthur David Olson (2008-03-09): 2712177591Sedwin# I'm in Maryland which is now observing United States Eastern Daylight 2713177591Sedwin# Time. At 9:44 local time I used RealPlayer to listen to 2714177591Sedwin# <a href="http://media.enet.cu/radioreloj"> 2715177591Sedwin# http://media.enet.cu/radioreloj 2716177591Sedwin# </a>, a Cuban information station, and heard 2717177591Sedwin# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2718177591Sedwin# indicating that Cuba is still on standard time. 2719177591Sedwin 2720177591Sedwin# From Steffen Thorsen (2008-03-12): 2721177591Sedwin# It seems that Cuba will start DST on Sunday, 2007-03-16... 2722177591Sedwin# It was announced yesterday, according to this source (in Spanish): 2723177591Sedwin# <a href="http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm"> 2724177591Sedwin# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2725177591Sedwin# </a> 2726177591Sedwin# 2727177591Sedwin# Some more background information is posted here: 2728177591Sedwin# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html"> 2729177591Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2730177591Sedwin# </a> 2731177591Sedwin# 2732177591Sedwin# The article also says that Cuba has been observing DST since 1963, 2733177591Sedwin# while Shanks (and tzdata) has 1965 as the first date (except in the 2734177591Sedwin# 1940's). Many other web pages in Cuba also claim that it has been 2735177591Sedwin# observed since 1963, but with the exception of 1970 - an exception 2736177591Sedwin# which is not present in tzdata/Shanks. So there is a chance we need to 2737177591Sedwin# change some historic records as well. 2738177591Sedwin# 2739177591Sedwin# One example: 2740177591Sedwin# <a href="http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm"> 2741177591Sedwin# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2742177591Sedwin# </a> 2743177591Sedwin 2744177591Sedwin# From Jesper Norgaard Welen (2008-03-13): 2745177591Sedwin# The Cuban time change has just been confirmed on the most authoritative 2746177591Sedwin# web site, the Granma. Please check out 2747177591Sedwin# <a href="http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html"> 2748177591Sedwin# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2749177591Sedwin# </a> 2750177591Sedwin# 2751177591Sedwin# Basically as expected after Steffen Thorsens information, the change 2752177591Sedwin# will take place midnight between Saturday and Sunday. 2753177591Sedwin 2754177591Sedwin# From Arthur David Olson (2008-03-12): 2755177591Sedwin# Assume Sun>=15 (third Sunday) going forward. 2756177591Sedwin 2757189923Sedwin# From Alexander Krivenyshev (2009-03-04) 2758189923Sedwin# According to the Radio Reloj - Cuba will start Daylight Saving Time on 2759189923Sedwin# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2760189923Sedwin# not on midnight March 14 / March 15 as previously thought. 2761189923Sedwin# 2762189923Sedwin# <a href="http://www.worldtimezone.com/dst_news/dst_news_cuba05.html"> 2763189923Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2764189923Sedwin# (in Spanish) 2765189923Sedwin# </a> 2766189923Sedwin 2767189923Sedwin# From Arthur David Olson (2009-03-09) 2768189923Sedwin# I listened over the Internet to 2769189923Sedwin# <a href="http://media.enet.cu/readioreloj"> 2770189923Sedwin# http://media.enet.cu/readioreloj 2771189923Sedwin# </a> 2772189923Sedwin# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2773189923Sedwin# the time was announced as "diez cinco"--the same time as here, indicating 2774189923Sedwin# that has indeed switched to DST. Assume second Sunday from 2009 forward. 2775189923Sedwin 2776219687Sedwin# From Steffen Thorsen (2011-03-08): 2777219687Sedwin# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2778219687Sedwin# this year. Nothing about the end date known so far (if that has 2779219687Sedwin# changed at all). 2780219687Sedwin# 2781219687Sedwin# Source: 2782219687Sedwin# <a href="http://granma.co.cu/2011/03/08/nacional/artic01.html"> 2783219687Sedwin# http://granma.co.cu/2011/03/08/nacional/artic01.html 2784219687Sedwin# </a> 2785219687Sedwin# 2786219687Sedwin# Our info: 2787219687Sedwin# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html"> 2788219687Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2789219687Sedwin# </a> 2790233446Sedwin# 2791233446Sedwin# From Steffen Thorsen (2011-10-30) 2792240461Sedwin# Cuba will end DST two weeks later this year. Instead of going back 2793233446Sedwin# tonight, it has been delayed to 2011-11-13 at 01:00. 2794233446Sedwin# 2795233446Sedwin# One source (Spanish) 2796233446Sedwin# <a href="http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html"> 2797233446Sedwin# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2798233446Sedwin# </a> 2799233446Sedwin# 2800233446Sedwin# Our page: 2801233446Sedwin# <a href="http://www.timeanddate.com/news/time/cuba-time-changes-2011.html"> 2802233446Sedwin# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2803233446Sedwin# </a> 2804240461Sedwin# 2805240461Sedwin# From Steffen Thorsen (2012-03-01) 2806240461Sedwin# According to Radio Reloj, Cuba will start DST on Midnight between March 2807240461Sedwin# 31 and April 1. 2808240461Sedwin# 2809240461Sedwin# Radio Reloj has the following info (Spanish): 2810240461Sedwin# <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"> 2811240461Sedwin# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2812240461Sedwin# </a> 2813240461Sedwin# 2814240461Sedwin# Our info on it: 2815240461Sedwin# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html"> 2816240461Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2817240461Sedwin# </a> 2818219687Sedwin 2819242932Sedwin# From Steffen Thorsen (2012-11-03): 2820242932Sedwin# Radio Reloj and many other sources report that Cuba is changing back 2821242932Sedwin# to standard time on 2012-11-04: 2822242932Sedwin# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2823242932Sedwin# From Paul Eggert (2012-11-03): 2824242932Sedwin# For now, assume the future rule is first Sunday in November. 2825242932Sedwin 28262742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 28272742SwollmanRule Cuba 1928 only - Jun 10 0:00 1:00 D 28282742SwollmanRule Cuba 1928 only - Oct 10 0:00 0 S 28292742SwollmanRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 28302742SwollmanRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 28312742SwollmanRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 28322742SwollmanRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 28332742SwollmanRule Cuba 1965 only - Jun 1 0:00 1:00 D 28342742SwollmanRule Cuba 1965 only - Sep 30 0:00 0 S 28352742SwollmanRule Cuba 1966 only - May 29 0:00 1:00 D 28362742SwollmanRule Cuba 1966 only - Oct 2 0:00 0 S 28372742SwollmanRule Cuba 1967 only - Apr 8 0:00 1:00 D 28382742SwollmanRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 28392742SwollmanRule Cuba 1968 only - Apr 14 0:00 1:00 D 28402742SwollmanRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 28412742SwollmanRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 28422742SwollmanRule Cuba 1972 1974 - Oct 8 0:00 0 S 28432742SwollmanRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 28442742SwollmanRule Cuba 1978 only - May 7 0:00 1:00 D 284530711SwollmanRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 28462742SwollmanRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 28472742SwollmanRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 28482742SwollmanRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 284943014SwollmanRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 285020094SwollmanRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 285143014SwollmanRule Cuba 1996 only - Oct 6 0:00s 0 S 285243014SwollmanRule Cuba 1997 only - Oct 12 0:00s 0 S 285358787SruRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2854138323SwollmanRule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2855187588SedwinRule Cuba 2000 2004 - Apr Sun>=1 0:00s 1:00 D 2856233446SedwinRule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 2857177591SedwinRule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2858189923SedwinRule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2859219687SedwinRule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 2860219687SedwinRule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 2861233446SedwinRule Cuba 2011 only - Nov 13 0:00s 0 S 2862240461SedwinRule Cuba 2012 only - Apr 1 0:00s 1:00 D 2863242932SedwinRule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 2864240461SedwinRule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 28652742Swollman 28662742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28672742SwollmanZone America/Havana -5:29:28 - LMT 1890 286858787Sru -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 28692742Swollman -5:00 Cuba C%sT 28702742Swollman 28712742Swollman# Dominica 28722742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28732742SwollmanZone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau 28742742Swollman -4:00 - AST 28752742Swollman 28762742Swollman# Dominican Republic 287775267Swollman 287875267Swollman# From Steffen Thorsen (2000-10-30): 287975267Swollman# Enrique Morales reported to me that the Dominican Republic has changed the 288075267Swollman# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 288175267Swollman# http://www.listin.com.do/antes/261000/republica/princi.html 288275267Swollman 288375267Swollman# From Paul Eggert (2000-12-04): 288475267Swollman# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 288575267Swollman 288675267Swollman# From Rives McDow (2000-12-01): 288775267Swollman# Dominican Republic changed its mind and presidential decree on Tuesday, 288875267Swollman# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 288975267Swollman# Dominican Republic will be reverting to 8 hours from the International Date 289075267Swollman# Line, and will not be using DST in the foreseeable future. The reason they 289175267Swollman# decided to use DST was to be in synch with Puerto Rico, who was also going 289275267Swollman# to implement DST. When Puerto Rico didn't implement DST, the president 289375267Swollman# decided to revert. 289475267Swollman 289575267Swollman 28962742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 28972742SwollmanRule DR 1966 only - Oct 30 0:00 1:00 D 28982742SwollmanRule DR 1967 only - Feb 28 0:00 0 S 28992742SwollmanRule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 29002742SwollmanRule DR 1970 only - Feb 21 0:00 0 S 29012742SwollmanRule DR 1971 only - Jan 20 0:00 0 S 29022742SwollmanRule DR 1972 1974 - Jan 21 0:00 0 S 29032742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29042742SwollmanZone America/Santo_Domingo -4:39:36 - LMT 1890 29052742Swollman -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 29062742Swollman -5:00 DR E%sT 1974 Oct 27 290775267Swollman -4:00 - AST 2000 Oct 29 02:00 290875267Swollman -5:00 US E%sT 2000 Dec 3 01:00 29092742Swollman -4:00 - AST 29102742Swollman 29112742Swollman# El Salvador 2912158421Swollman 29132742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 29142742SwollmanRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 29152742SwollmanRule Salv 1987 1988 - Sep lastSun 0:00 0 S 2916121098Swollman# There are too many San Salvadors elsewhere, so use America/El_Salvador 2917121098Swollman# instead of America/San_Salvador. 29182742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29192742SwollmanZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 29202742Swollman -6:00 Salv C%sT 29212742Swollman 29222742Swollman# Grenada 29232742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 292419878SwollmanZone America/Grenada -4:07:00 - LMT 1911 Jul # St George's 29252742Swollman -4:00 - AST 29262742Swollman 29272742Swollman# Guadeloupe 29282742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29292742SwollmanZone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre 29302742Swollman -4:00 - AST 2931174242Sedwin# St Barthelemy 2932174242SedwinLink America/Guadeloupe America/St_Barthelemy 2933174242Sedwin# St Martin (French part) 2934174242SedwinLink America/Guadeloupe America/Marigot 29352742Swollman 29362742Swollman# Guatemala 2937158421Swollman# 2938158421Swollman# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2939158421Swollman# Diario Co Latino, at 2940158421Swollman# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079, 2941158421Swollman# says in an article dated 2006-04-19 that the Guatemalan government had 2942158421Swollman# decided on that date to advance official time by 60 minutes, to lessen the 2943158421Swollman# impact of the elevated cost of oil.... Daylight saving time will last from 2944158421Swollman# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2945163302Sru# From Paul Eggert (2006-06-22): 2946163302Sru# The Ministry of Energy and Mines, press release CP-15/2006 2947163302Sru# (2006-04-19), says DST ends at 24:00. See 2948163302Sru# <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>. 2949163302Sru 29502742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 29512742SwollmanRule Guat 1973 only - Nov 25 0:00 1:00 D 29522742SwollmanRule Guat 1974 only - Feb 24 0:00 0 S 29532742SwollmanRule Guat 1983 only - May 21 0:00 1:00 D 29542742SwollmanRule Guat 1983 only - Sep 22 0:00 0 S 295520094SwollmanRule Guat 1991 only - Mar 23 0:00 1:00 D 295620094SwollmanRule Guat 1991 only - Sep 7 0:00 0 S 2957158421SwollmanRule Guat 2006 only - Apr 30 0:00 1:00 D 2958158421SwollmanRule Guat 2006 only - Oct 1 0:00 0 S 29592742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29602742SwollmanZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 29612742Swollman -6:00 Guat C%sT 29622742Swollman 29632742Swollman# Haiti 2964149514Swollman# From Gwillim Law (2005-04-15): 2965149514Swollman# Risto O. Nykanen wrote me that Haiti is now on DST. 2966149514Swollman# I searched for confirmation, and I found a 2967149514Swollman# <a href="http://www.haitianconsulate.org/time.doc"> press release 2968149514Swollman# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 2969149514Swollman# </a>. Translated from French, it says: 2970149514Swollman# 2971149514Swollman# "The Prime Minister's Communication Office notifies the public in general 2972149514Swollman# and the press in particular that, following a decision of the Interior 2973149514Swollman# Ministry and the Territorial Collectivities [I suppose that means the 2974149514Swollman# provinces], Haiti will move to Eastern Daylight Time in the night from next 2975149514Swollman# Saturday the 2nd to Sunday the 3rd. 2976149514Swollman# 2977149514Swollman# "Consequently, the Prime Minister's Communication Office wishes to inform 2978149514Swollman# the population that the country's clocks will be set forward one hour 2979149514Swollman# starting at midnight. This provision will hold until the last Saturday in 2980149514Swollman# October 2005. 2981149514Swollman# 2982149514Swollman# "Port-au-Prince, March 31, 2005" 2983158421Swollman# 2984158421Swollman# From Steffen Thorsen (2006-04-04): 2985158421Swollman# I have been informed by users that Haiti observes DST this year like 2986158421Swollman# last year, so the current "only" rule for 2005 might be changed to a 2987158421Swollman# "max" rule or to last until 2006. (Who knows if they will observe DST 2988158421Swollman# next year or if they will extend their DST like US/Canada next year). 2989158421Swollman# 2990158421Swollman# I have found this article about it (in French): 2991158421Swollman# http://www.haitipressnetwork.com/news.cfm?articleID=7612 2992158421Swollman# 2993158421Swollman# The reason seems to be an energy crisis. 2994149514Swollman 2995169811Swollman# From Stephen Colebourne (2007-02-22): 2996169811Swollman# Some IATA info: Haiti won't be having DST in 2007. 2997158421Swollman 2998240461Sedwin# From Steffen Thorsen (2012-03-11): 2999240461Sedwin# According to several news sources, Haiti will observe DST this year, 3000240461Sedwin# apparently using the same start and end date as USA/Canada. 3001240461Sedwin# So this means they have already changed their time. 3002240461Sedwin# 3003240461Sedwin# http://www.alterpresse.org/spip.php?article12510 3004240461Sedwin# http://radiovision2000haiti.net/home/?p=13253 3005240461Sedwin# 3006240461Sedwin# From Arthur David Olson (2012-03-11): 3007240461Sedwin# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 3008240461Sedwin# 3:00 a.m. rather than the traditional Haitian jump at midnight. 3009248310Sedwin# Assume a US-style fall back as well. 3010240461Sedwin 3011248310Sedwin# From Steffen Thorsen (2013-03-10): 3012248310Sedwin# It appears that Haiti is observing DST this year as well, same rules 3013248310Sedwin# as US/Canada. They did it last year as well, and it looks like they 3014248310Sedwin# are going to observe DST every year now... 3015248310Sedwin# 3016248310Sedwin# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 3017248310Sedwin# http://www.canalplushaiti.net/?p=6714 3018248310Sedwin 30192742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 30202742SwollmanRule Haiti 1983 only - May 8 0:00 1:00 D 30212742SwollmanRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 30222742SwollmanRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 3023158421Swollman# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 3024158421Swollman# Go with IATA. 302543014SwollmanRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 302643014SwollmanRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 3027169811SwollmanRule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 3028169811SwollmanRule Haiti 2005 2006 - Oct lastSun 0:00 0 S 3029248310SedwinRule Haiti 2012 max - Mar Sun>=8 2:00 1:00 D 3030248310SedwinRule Haiti 2012 max - Nov Sun>=1 2:00 0 S 30312742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 30322742SwollmanZone America/Port-au-Prince -4:49:20 - LMT 1890 30332742Swollman -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 30342742Swollman -5:00 Haiti E%sT 30352742Swollman 30362742Swollman# Honduras 3037158421Swollman# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 3038158421Swollman 3039158421Swollman# From Paul Eggert (2006-05-05): 3040158421Swollman# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 3041158421Swollman# saying Honduras will start using DST midnight Saturday, effective 4 3042158421Swollman# months until September. La Tribuna reported today 3043158421Swollman# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 3044163302Sru# of Honduras, refused to back down on this. 3045158421Swollman 3046163302Sru# From Jesper Norgaard Welen (2006-08-08): 3047163302Sru# It seems that Honduras has returned from DST to standard time this Monday at 3048163302Sru# 00:00 hours (prolonging Sunday to 25 hours duration). 3049163302Sru# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 3050163302Sru 3051163302Sru# From Paul Eggert (2006-08-08): 3052163302Sru# Also see Diario El Heraldo, The country returns to standard time (2006-08-08) 3053163302Sru# <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>. 3054163302Sru# It mentions executive decree 18-2006. 3055163302Sru 3056163302Sru# From Steffen Thorsen (2006-08-17): 3057163302Sru# Honduras will observe DST from 2007 to 2009, exact dates are not 3058163302Sru# published, I have located this authoritative source: 3059163302Sru# http://www.presidencia.gob.hn/noticia.aspx?nId=47 3060163302Sru 3061169811Swollman# From Steffen Thorsen (2007-03-30): 3062169811Swollman# http://www.laprensahn.com/pais_nota.php?id04962=7386 3063169811Swollman# So it seems that Honduras will not enter DST this year.... 3064169811Swollman 3065158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3066158421SwollmanRule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 3067158421SwollmanRule Hond 1987 1988 - Sep lastSun 0:00 0 S 3068169811SwollmanRule Hond 2006 only - May Sun>=1 0:00 1:00 D 3069169811SwollmanRule Hond 2006 only - Aug Mon>=1 0:00 0 S 30702742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 30712742SwollmanZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3072158421Swollman -6:00 Hond C%sT 307343543Swollman# 307443543Swollman# Great Swan I ceded by US to Honduras in 1972 30752742Swollman 30762742Swollman# Jamaica 30772742Swollman 307819878Swollman# From Bob Devine (1988-01-28): 30792742Swollman# Follows US rules. 30802742Swollman 308119878Swollman# From U. S. Naval Observatory (1989-01-19): 30822742Swollman# JAMAICA 5 H BEHIND UTC 30832742Swollman 3084158421Swollman# From Shanks & Pottenger: 30852742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 30862742SwollmanZone America/Jamaica -5:07:12 - LMT 1890 # Kingston 308743014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 308858787Sru -5:00 - EST 1974 Apr 28 2:00 308920094Swollman -5:00 US E%sT 1984 309020094Swollman -5:00 - EST 30912742Swollman 30922742Swollman# Martinique 30932742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 30942742SwollmanZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 309586222Swollman -4:04:20 - FFMT 1911 May # Fort-de-France MT 30962742Swollman -4:00 - AST 1980 Apr 6 30972742Swollman -4:00 1:00 ADT 1980 Sep 28 30982742Swollman -4:00 - AST 30992742Swollman 31002742Swollman# Montserrat 3101158421Swollman# From Paul Eggert (2006-03-22): 3102158421Swollman# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital. 3103158421Swollman# world.gazetteer.com says Cork Hill is the most populous location now. 31042742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3105158421SwollmanZone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill 31062742Swollman -4:00 - AST 31072742Swollman 31082742Swollman# Nicaragua 310943543Swollman# 3110158421Swollman# This uses Shanks & Pottenger for times before 2005. 311143543Swollman# 3112149514Swollman# From Steffen Thorsen (2005-04-12): 3113149514Swollman# I've got reports from 8 different people that Nicaragua just started 3114149514Swollman# DST on Sunday 2005-04-10, in order to save energy because of 3115149514Swollman# expensive petroleum. The exact end date for DST is not yet 3116149514Swollman# announced, only "September" but some sites also say "mid-September". 3117149514Swollman# Some background information is available on the President's official site: 3118149514Swollman# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3119149514Swollman# The Decree, no 23-2005 is available here: 3120149514Swollman# 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 3121149514Swollman# 3122149514Swollman# From Paul Eggert (2005-05-01): 3123149514Swollman# The decree doesn't say anything about daylight saving, but for now let's 3124158421Swollman# assume that it is daylight saving.... 3125149514Swollman# 3126149514Swollman# From Gwillim Law (2005-04-21): 3127149514Swollman# The Associated Press story on the time change, which can be found at 3128149514Swollman# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3129149514Swollman# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3130149514Swollman# time that a change of clocks was applied to save energy was in the year 2000 3131149514Swollman# during the Arnoldo Aleman administration."... 3132149514Swollman# The northamerica file says that Nicaragua has been on UTC-6 continuously 3133149514Swollman# since December 1998. I wasn't able to find any details of Nicaraguan time 3134149514Swollman# changes in 2000. Perhaps a note could be added to the northamerica file, to 3135149514Swollman# the effect that we have indirect evidence that DST was observed in 2000. 3136149514Swollman# 3137153670Swollman# From Jesper Norgaard Welen (2005-11-02): 3138153670Swollman# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3139153670Swollman# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3140153670Swollman# (2005-09-26) 3141153670Swollman# 3142158421Swollman# From Jesper Norgaard Welen (2006-05-05): 3143158421Swollman# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3144158421Swollman# (my informal translation) 3145158421Swollman# By order of the president of the republic, Enrique Bolanos, Nicaragua 3146158421Swollman# advanced by sixty minutes their official time, yesterday at 2 in the 3147158421Swollman# morning, and will stay that way until 30.th. of september. 3148158421Swollman# 3149163302Sru# From Jesper Norgaard Welen (2006-09-30): 3150163302Sru# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3151163302Sru# My informal translation runs: 3152163302Sru# The natural sun time is restored in all the national territory, in that the 3153163302Sru# time is returned one hour at 01:00 am of October 1 of 2006. 3154163302Sru# 31552742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 31562742SwollmanRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 31572742SwollmanRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3158149514SwollmanRule Nic 2005 only - Apr 10 0:00 1:00 D 3159163302SruRule Nic 2005 only - Oct Sun>=1 0:00 0 S 3160158421SwollmanRule Nic 2006 only - Apr 30 2:00 1:00 D 3161163302SruRule Nic 2006 only - Oct Sun>=1 1:00 0 S 31622742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 31632742SwollmanZone America/Managua -5:45:08 - LMT 1890 316486222Swollman -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 31652742Swollman -6:00 - CST 1973 May 31662742Swollman -5:00 - EST 1975 Feb 16 3167158421Swollman -6:00 Nic C%sT 1992 Jan 1 4:00 3168158421Swollman -5:00 - EST 1992 Sep 24 3169158421Swollman -6:00 - CST 1993 3170158421Swollman -5:00 - EST 1997 3171149514Swollman -6:00 Nic C%sT 31722742Swollman 31732742Swollman# Panama 31742742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 31752742SwollmanZone America/Panama -5:18:08 - LMT 1890 317686222Swollman -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time 31772742Swollman -5:00 - EST 31782742Swollman 31792742Swollman# Puerto Rico 31802742Swollman# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. 31812742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 318214343SwollmanZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 31832742Swollman -4:00 - AST 1942 May 3 3184158421Swollman -4:00 US A%sT 1946 31852742Swollman -4:00 - AST 31862742Swollman 31872742Swollman# St Kitts-Nevis 31882742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 31892742SwollmanZone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre 31902742Swollman -4:00 - AST 31912742Swollman 31922742Swollman# St Lucia 31932742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 31942742SwollmanZone America/St_Lucia -4:04:00 - LMT 1890 # Castries 319586222Swollman -4:04:00 - CMT 1912 # Castries Mean Time 31962742Swollman -4:00 - AST 31972742Swollman 31982742Swollman# St Pierre and Miquelon 31992742Swollman# There are too many St Pierres elsewhere, so we'll use `Miquelon'. 32002742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 32012742SwollmanZone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 32022742Swollman -4:00 - AST 1980 May 3203121098Swollman -3:00 - PMST 1987 # Pierre & Miquelon Time 3204121098Swollman -3:00 Canada PM%sT 32052742Swollman 32062742Swollman# St Vincent and the Grenadines 32072742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 32082742SwollmanZone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown 320943014Swollman -4:04:56 - KMT 1912 # Kingstown Mean Time 32102742Swollman -4:00 - AST 32112742Swollman 32122742Swollman# Turks and Caicos 3213169811Swollman# 3214169811Swollman# From Chris Dunn in 3215169811Swollman# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007> 3216169811Swollman# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3217169811Swollman# daylight saving dates for time changes have been adjusted to match 3218169811Swollman# the recent U.S. change of dates. 3219169811Swollman# 3220169811Swollman# From Brian Inglis (2007-04-28): 3221169811Swollman# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3222169811Swollman# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3223169811Swollman# rows before that there is an out of date entry for Oct: 3224169811Swollman# "Eastern Standard Times Begins 2007 3225169811Swollman# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3226169811Swollman# indicating that the normal ET rules are followed. 3227169811Swollman# 3228169811Swollman# From Paul Eggert (2006-05-01): 3229158421Swollman# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) 3230169811Swollman# says they switch at midnight. Go with Shanks & Pottenger. 3231169811Swollman# 323220094Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3233169811SwollmanRule TC 1979 1986 - Apr lastSun 2:00 1:00 D 3234169811SwollmanRule TC 1979 2006 - Oct lastSun 2:00 0 S 3235169811SwollmanRule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D 3236169811SwollmanRule TC 2007 max - Mar Sun>=8 2:00 1:00 D 3237169811SwollmanRule TC 2007 max - Nov Sun>=1 2:00 0 S 32382742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 32392742SwollmanZone America/Grand_Turk -4:44:32 - LMT 1890 324043014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 324120094Swollman -5:00 TC E%sT 32428029Swollman 324314343Swollman# British Virgin Is 32442742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 324514343SwollmanZone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town 32462742Swollman -4:00 - AST 32478029Swollman 324814343Swollman# Virgin Is 324914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 325014343SwollmanZone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie 325114343Swollman -4:00 - AST 3252