northamerica revision 210718
1153761Swollman# <pre> 2210718Sedwin# @(#)northamerica 8.34 3192886Sedwin# This file is in the public domain, so clarified as of 4192886Sedwin# 2009-05-17 by Arthur David Olson. 5153761Swollman 62742Swollman# also includes Central America and the Caribbean 72742Swollman 82742Swollman# This data is by no means authoritative; if you think you know better, 92742Swollman# go ahead and edit the file (and please send any changes to 102742Swollman# tz@elsie.nci.nih.gov for general use in the future). 112742Swollman 12149514Swollman# From Paul Eggert (1999-03-22): 132742Swollman# A reliable and entertaining source about time zones is 1458787Sru# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 152742Swollman 162742Swollman############################################################################### 172742Swollman 182742Swollman# United States 192742Swollman 2058787Sru# From Paul Eggert (1999-03-31): 2158787Sru# Howse writes (pp 121-125) that time zones were invented by 2258787Sru# Professor Charles Ferdinand Dowd (1825-1904), 2358787Sru# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 2458787Sru# His pamphlet ``A System of National Time for Railroads'' (1870) 2558787Sru# was the result of his proposals at the Convention of Railroad Trunk Lines 2658787Sru# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 2758787Sru# but in 1872-05 he moved the proposed origin to Greenwich. 2858787Sru# His proposal was adopted by the railroads on 1883-11-18 at 12:00, 2958787Sru# and the most of the country soon followed suit. 3058787Sru 31149514Swollman# From Paul Eggert (2005-04-16): 32149514Swollman# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 33149514Swollman# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 34149514Swollman 35158421Swollman# From Paul Eggert (2006-03-22): 3614343Swollman# A good source for time zone historical data in the US is 3714343Swollman# Thomas G. Shanks, The American Atlas (5th edition), 3814343Swollman# San Diego: ACS Publications, Inc. (1991). 3914343Swollman# Make sure you have the errata sheet; the book is somewhat useless without it. 40158421Swollman# It is the source for most of the pre-1991 US entries below. 4114343Swollman 4275267Swollman# From Paul Eggert (2001-03-06): 4317200Swollman# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 4475267Swollman# in his whimsical essay ``An Economical Project for Diminishing the Cost 4575267Swollman# of Light'' published in the Journal de Paris (1784-04-26). 4617200Swollman# Not everyone is happy with the results: 4717200Swollman# 4817200Swollman# I don't really care how time is reckoned so long as there is some 4917200Swollman# agreement about it, but I object to being told that I am saving 5017200Swollman# daylight when my reason tells me that I am doing nothing of the kind. 5117200Swollman# I even object to the implication that I am wasting something 5217200Swollman# valuable if I stay in bed after the sun has risen. As an admirer 5317200Swollman# of moonlight I resent the bossy insistence of those who want to 5417200Swollman# reduce my time for enjoying it. At the back of the Daylight Saving 5517200Swollman# scheme I detect the bony, blue-fingered hand of Puritanism, eager 5617200Swollman# to push people into bed earlier, and get them up earlier, to make 5717200Swollman# them healthy, wealthy and wise in spite of themselves. 5817200Swollman# 59149514Swollman# -- Robertson Davies, The diary of Samuel Marchbanks, 60149514Swollman# Clarke, Irwin (1947), XIX, Sunday 6175267Swollman# 6275267Swollman# For more about the first ten years of DST in the United States, see 6375267Swollman# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html"> 6475267Swollman# Ten years of daylight saving from the Pittsburgh standpoint 6575267Swollman# (Carnegie Library of Pittsburgh, 1927)</a>. 6675267Swollman# 6775267Swollman# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 6875267Swollman# However, DST was imposed by the Standard Time Act of 1918, which 6975267Swollman# was the first nationwide legal time standard, and apparently 7075267Swollman# time was just called "Standard Time" or "Daylight Saving Time". 7117200Swollman 722742Swollman# From Arthur David Olson: 732742Swollman# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 7419878Swollman# See, for example, the front page of the Saturday, 1974-10-26 7519878Swollman# and Sunday, 1974-10-27 editions of the Washington Post. 762742Swollman 772742Swollman# From Arthur David Olson: 782742Swollman# Before the Uniform Time Act of 1966 took effect in 1967, observance of 792742Swollman# Daylight Saving Time in the US was by local option, except during wartime. 802742Swollman 8167578Swollman# From Arthur David Olson (2000-09-25): 8267578Swollman# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 8367578Swollman# In the introduction, Oboler spoke of "Eastern Peace Time." 8467578Swollman# An AltaVista search turned up 8567578Swollman# <a href="http://rowayton.org/rhs/hstaug45.html">: 8667578Swollman# "When the time is announced over the radio now, it is 'Eastern Peace 8767578Swollman# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 8867578Swollman# </a> (August 1945) by way of confirmation. 8967578Swollman 90149514Swollman# From Joseph Gallant citing 9167578Swollman# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 9267578Swollman# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 9386222Swollman# to switch to London for Attlee's address, but the American people 9467578Swollman# never got to hear his speech live. According to one press account, 9567578Swollman# CBS' Bob Trout was first to announce the word of Japan's surrender, 9667578Swollman# but a few seconds later, NBC, ABC and Mutual also flashed the word 9767578Swollman# of surrender, all of whom interrupting the bells of Big Ben in 9886222Swollman# London which were to precede Mr. Attlee's speech. 9967578Swollman 100114173Swollman# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 101114173Swollman# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 102114173Swollman# 103114173Swollman# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 104114173Swollman# Any announcement from Asia would reach St. John's New York newsroom on a 105114173Swollman# wire service teletype machine, which had prescribed signals for major news. 106114173Swollman# Associated Press, for example, would ring five bells before spewing out 107114173Swollman# typed copy of an important story, and 10 bells for news "of transcendental 108114173Swollman# importance." 109114173Swollman# 110114173Swollman# On Aug. 14, stalling while talking steadily into the NBC networks' open 111114173Swollman# microphone, St. John heard five bells and waited only to hear a sixth bell, 112114173Swollman# before announcing confidently: "Ladies and gentlemen, World War II is over. 113114173Swollman# The Japanese have agreed to our surrender terms." 114114173Swollman# 115114173Swollman# He had scored a 20-second scoop on other broadcasters. 116114173Swollman 117149590Swollman# From Arthur David Olson (2005-08-22): 118149590Swollman# Paul has been careful to use the "US" rules only in those locations 119149590Swollman# that are part of the United States; this reflects the real scope of 120149590Swollman# U.S. government action. So even though the "US" rules have changed 121149590Swollman# in the latest release, other countries won't be affected. 122149590Swollman 1232742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 12475267SwollmanRule US 1918 1919 - Mar lastSun 2:00 1:00 D 1252742SwollmanRule US 1918 1919 - Oct lastSun 2:00 0 S 1262742SwollmanRule US 1942 only - Feb 9 2:00 1:00 W # War 12767578SwollmanRule US 1945 only - Aug 14 23:00u 1:00 P # Peace 1282742SwollmanRule US 1945 only - Sep 30 2:00 0 S 129149514SwollmanRule US 1967 2006 - Oct lastSun 2:00 0 S 1302742SwollmanRule US 1967 1973 - Apr lastSun 2:00 1:00 D 1312742SwollmanRule US 1974 only - Jan 6 2:00 1:00 D 1322742SwollmanRule US 1975 only - Feb 23 2:00 1:00 D 1332742SwollmanRule US 1976 1986 - Apr lastSun 2:00 1:00 D 134149514SwollmanRule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 135149514SwollmanRule US 2007 max - Mar Sun>=8 2:00 1:00 D 136149514SwollmanRule US 2007 max - Nov Sun>=1 2:00 0 S 1372742Swollman 138153761Swollman# From Arthur David Olson, 2005-12-19 139153761Swollman# We generate the files specified below to guard against old files with 140153761Swollman# obsolete information being left in the time zone binary directory. 141153761Swollman# We limit the list to names that have appeared in previous versions of 142153761Swollman# this time zone package. 143153761Swollman# We do these as separate Zones rather than as Links to avoid problems if 144153761Swollman# a particular place changes whether it observes DST. 145153761Swollman# We put these specifications here in the northamerica file both to 146153761Swollman# increase the chances that they'll actually get compiled and to 147153761Swollman# avoid the need to duplicate the US rules in another file. 148153761Swollman 149153761Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 150153761SwollmanZone EST -5:00 - EST 151153761SwollmanZone MST -7:00 - MST 152153761SwollmanZone HST -10:00 - HST 153153761SwollmanZone EST5EDT -5:00 US E%sT 154153761SwollmanZone CST6CDT -6:00 US C%sT 155153761SwollmanZone MST7MDT -7:00 US M%sT 156153761SwollmanZone PST8PDT -8:00 US P%sT 157153761Swollman 15819878Swollman# From Bob Devine (1988-01-28): 1592742Swollman# ...Alaska (and Hawaii) had the timezone names changed in 1967. 1602742Swollman# old new 1612742Swollman# Pacific Standard Time(PST) -same- 1622742Swollman# Yukon Standard Time(YST) -same- 1632742Swollman# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 1642742Swollman# Nome Standard Time (NT) Bering Standard Time (BST) 1652742Swollman# 1662742Swollman# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 1672742Swollman# The YST zone now covers nearly all of the state, AHST just part 1682742Swollman# of the Aleutian islands. No DST. 1692742Swollman 17014343Swollman# From Paul Eggert (1995-12-19): 17114343Swollman# The tables below use `NST', not `NT', for Nome Standard Time. 17214343Swollman# I invented `CAWT' for Central Alaska War Time. 17314343Swollman 17419878Swollman# From U. S. Naval Observatory (1989-01-19): 1752742Swollman# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 1762742Swollman# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 1772742Swollman# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 1782742Swollman# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 1792742Swollman# USA MOUNTAIN 7 H BEHIND UTC DENVER 1802742Swollman# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 1812742Swollman# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 1822742Swollman# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 1832742Swollman# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 1842742Swollman# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 1852742Swollman# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 1862742Swollman# USA - " - 9 H BEHIND UTC APR 3 - OCT 30 1872742Swollman# USA HAWAII 10 H BEHIND UTC 1882742Swollman# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 1892742Swollman 19019878Swollman# From Arthur David Olson (1989-01-21): 1912742Swollman# The above dates are for 1988. 1922742Swollman# Note the "AKST" and "AKDT" abbreviations, the claim that there's 1932742Swollman# no DST in Samoa, and the claim that there is DST in Alaska and the 1942742Swollman# Aleutians. 1952742Swollman 19619878Swollman# From Arthur David Olson (1988-02-13): 1972742Swollman# Legal standard time zone names, from United States Code (1982 Edition and 1982742Swollman# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 19919878Swollman# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 2002742Swollman# took effect), as explained in sections 263 and 261: 2012742Swollman# (none) 2022742Swollman# United States standard eastern time 2032742Swollman# United States standard mountain time 2042742Swollman# United States standard central time 2052742Swollman# United States standard Pacific time 2062742Swollman# (none) 2072742Swollman# United States standard Alaska time 2082742Swollman# (none) 20919878Swollman# Next, names from 1967-04-01 until 1983-11-30 (the date for 2102742Swollman# public law 98-181): 2112742Swollman# Atlantic standard time 2122742Swollman# eastern standard time 2132742Swollman# central standard time 2142742Swollman# mountain standard time 2152742Swollman# Pacific standard time 2162742Swollman# Yukon standard time 2172742Swollman# Alaska-Hawaii standard time 2182742Swollman# Bering standard time 21919878Swollman# And after 1983-11-30: 2202742Swollman# Atlantic standard time 2212742Swollman# eastern standard time 2222742Swollman# central standard time 2232742Swollman# mountain standard time 2242742Swollman# Pacific standard time 2252742Swollman# Alaska standard time 2262742Swollman# Hawaii-Aleutian standard time 2272742Swollman# Samoa standard time 2282742Swollman# The law doesn't give abbreviations. 22914343Swollman# 23075267Swollman# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 23175267Swollman# Public law 106-564 (2000-12-23) introduced the abbreviation 23275267Swollman# "Chamorro Standard Time" for time in Guam and the Northern Marianas. 23375267Swollman# See the file "australasia". 234158421Swollman 235149514Swollman# From Arthur David Olson, 2005-08-09 236149514Swollman# The following was signed into law on 2005-08-08. 237149514Swollman# 238149514Swollman# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 239149514Swollman# (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15 240149514Swollman# U.S.C. 260a(a)) is amended-- 241149514Swollman# (1) by striking `first Sunday of April' and inserting `second 242149514Swollman# Sunday of March'; and 243149514Swollman# (2) by striking `last Sunday of October' and inserting `first 244149514Swollman# Sunday of November'. 245149514Swollman# (b) Effective Date- Subsection (a) shall take effect 1 year after the 246149514Swollman# date of enactment of this Act or March 1, 2007, whichever is later. 247149514Swollman# (c) Report to Congress- Not later than 9 months after the effective 248149514Swollman# date stated in subsection (b), the Secretary shall report to Congress 249149514Swollman# on the impact of this section on energy consumption in the United 250149514Swollman# States. 251149514Swollman# (d) Right to Revert- Congress retains the right to revert the 252149514Swollman# Daylight Saving Time back to the 2005 time schedules once the 253149514Swollman# Department study is complete. 2542742Swollman 25586222Swollman# US eastern time, represented by New York 25675267Swollman 25767578Swollman# Connecticut, Delaware, District of Columbia, most of Florida, 258149590Swollman# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 259149590Swollman# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 260114173Swollman# New Hampshire, New Jersey, New York, North Carolina, Ohio, 261114173Swollman# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 262114173Swollman# Vermont, Virginia, West Virginia 26367578Swollman 264149514Swollman# From Dave Cantor (2004-11-02): 265149514Swollman# Early this summer I had the occasion to visit the Mount Washington 266149514Swollman# Observatory weather station atop (of course!) Mount Washington [, NH].... 267149514Swollman# One of the staff members said that the station was on Eastern Standard Time 268149514Swollman# and didn't change their clocks for Daylight Saving ... so that their 269149514Swollman# reports will always have times which are 5 hours behind UTC. 270149514Swollman 271153670Swollman# From Paul Eggert (2005-08-26): 272153670Swollman# According to today's Huntsville Times 273153670Swollman# <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1> 274153670Swollman# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 275153670Swollman# in Russell County, Lanett in Chambers County and some towns in Lee County, 276153670Swollman# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 277153670Swollman# Roberts, city administrator in Phenix City. as saying "We are in the Central 278153670Swollman# time zone, but we do go by the Eastern time zone because so many people work 279158421Swollman# in Columbus." 280153670Swollman 28114343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 28214343SwollmanRule NYC 1920 only - Mar lastSun 2:00 1:00 D 28314343SwollmanRule NYC 1920 only - Oct lastSun 2:00 0 S 28414343SwollmanRule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 28514343SwollmanRule NYC 1921 1954 - Sep lastSun 2:00 0 S 28614343SwollmanRule NYC 1955 1966 - Oct lastSun 2:00 0 S 28714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 288149514SwollmanZone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 28914343Swollman -5:00 US E%sT 1920 29014343Swollman -5:00 NYC E%sT 1942 29114343Swollman -5:00 US E%sT 1946 29214343Swollman -5:00 NYC E%sT 1967 29314343Swollman -5:00 US E%sT 2942742Swollman 29586222Swollman# US central time, represented by Chicago 29667578Swollman 297136638Swollman# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 298136638Swollman# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 299136638Swollman# Washington counties), Illinois, western Indiana 300114173Swollman# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 301114173Swollman# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 302114173Swollman# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 303114173Swollman# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 304114173Swollman# western Tennessee, most of Texas, Wisconsin 30567578Swollman 306158421Swollman# From Larry M. Smith (2006-04-26) re Wisconsin: 307158421Swollman# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 308158421Swollman# is currently enforced at the 01:00 time of change. Because the local 309158421Swollman# "bar time" in the state corresponds to 02:00, a number of citations 310158421Swollman# are issued for the "sale of class 'B' alcohol after prohibited 311158421Swollman# hours" within the deviated hour of this change every year.... 312169811Swollman# 313169811Swollman# From Douglas R. Bomberg (2007-03-12): 314169811Swollman# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 315169811Swollman# Statue 175 closer in synch with the US Congress' intent.... 316169811Swollman# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 317158421Swollman 31814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 31914343SwollmanRule Chicago 1920 only - Jun 13 2:00 1:00 D 32014343SwollmanRule Chicago 1920 1921 - Oct lastSun 2:00 0 S 32114343SwollmanRule Chicago 1921 only - Mar lastSun 2:00 1:00 D 32214343SwollmanRule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 32314343SwollmanRule Chicago 1922 1954 - Sep lastSun 2:00 0 S 32414343SwollmanRule Chicago 1955 1966 - Oct lastSun 2:00 0 S 32514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 326149514SwollmanZone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 32714343Swollman -6:00 US C%sT 1920 32814343Swollman -6:00 Chicago C%sT 1936 Mar 1 2:00 32914343Swollman -5:00 - EST 1936 Nov 15 2:00 33014343Swollman -6:00 Chicago C%sT 1942 33114343Swollman -6:00 US C%sT 1946 33214343Swollman -6:00 Chicago C%sT 1967 33314343Swollman -6:00 US C%sT 33486222Swollman# Oliver County, ND switched from mountain to central time on 1992-10-25. 335149514SwollmanZone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 33686222Swollman -7:00 US M%sT 1992 Oct 25 02:00 33786222Swollman -6:00 US C%sT 338158421Swollman# Morton County, ND, switched from mountain to central time on 339158421Swollman# 2003-10-26, except for the area around Mandan which was already central time. 340158421Swollman# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 341158421Swollman# Officially this switch also included part of Sioux County, and 342158421Swollman# Jones, Mellette, and Todd Counties in South Dakota; 343158421Swollman# but in practice these other counties were already observing central time. 344158421Swollman# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 345158421SwollmanZone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 346158421Swollman -7:00 US M%sT 2003 Oct 26 02:00 347158421Swollman -6:00 US C%sT 3482742Swollman 34986222Swollman# US mountain time, represented by Denver 35067578Swollman# 351136638Swollman# Colorado, far western Kansas, Montana, western 35286222Swollman# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 353171948Sedwin# New Mexico, southwestern North Dakota, 35475267Swollman# western South Dakota, far western Texas (El Paso County, Hudspeth County, 35575267Swollman# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 35667578Swollman# 35714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 35814343SwollmanRule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 35914343SwollmanRule Denver 1920 only - Oct lastSun 2:00 0 S 36014343SwollmanRule Denver 1921 only - May 22 2:00 0 S 36114343SwollmanRule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 36214343SwollmanRule Denver 1965 1966 - Oct lastSun 2:00 0 S 3632742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 364149514SwollmanZone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 36515309Swollman -7:00 US M%sT 1920 36615309Swollman -7:00 Denver M%sT 1942 36715309Swollman -7:00 US M%sT 1946 36815309Swollman -7:00 Denver M%sT 1967 36915309Swollman -7:00 US M%sT 3702742Swollman 37114343Swollman# US Pacific time, represented by Los Angeles 37267578Swollman# 373136638Swollman# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 374171948Sedwin# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, 375171948Sedwin# and the northern three-quarters of Idaho county), 376136638Swollman# most of Nevada, most of Oregon, and Washington 37767578Swollman# 37814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 37914343SwollmanRule CA 1948 only - Mar 14 2:00 1:00 D 38014343SwollmanRule CA 1949 only - Jan 1 2:00 0 S 38114343SwollmanRule CA 1950 1966 - Apr lastSun 2:00 1:00 D 38214343SwollmanRule CA 1950 1961 - Sep lastSun 2:00 0 S 38314343SwollmanRule CA 1962 1966 - Oct lastSun 2:00 0 S 38414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 385149514SwollmanZone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 38614343Swollman -8:00 US P%sT 1946 38714343Swollman -8:00 CA P%sT 1967 38814343Swollman -8:00 US P%sT 3898029Swollman 39014343Swollman# Alaska 39114343Swollman# AK%sT is the modern abbreviation for -9:00 per USNO. 39214343Swollman# 39386222Swollman# From Paul Eggert (2001-05-30): 39414343Swollman# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 39519878Swollman# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 39675267Swollman# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 39775267Swollman# also a Friday. Include only the time zone part of this transition, 39875267Swollman# ignoring the switch from Julian to Gregorian, since we can't represent 39975267Swollman# the Julian calendar. 40014343Swollman# 40186222Swollman# As far as we know, none of the exact locations mentioned below were 40286222Swollman# permanently inhabited in 1867 by anyone using either calendar. 40386222Swollman# (Yakutat was colonized by the Russians in 1799, but the settlement 40486222Swollman# was destroyed in 1805 by a Yakutat-kon war party.) However, there 40586222Swollman# were nearby inhabitants in some cases and for our purposes perhaps 40686222Swollman# it's best to simply use the official transition. 40786222Swollman# 40814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 40975267SwollmanZone America/Juneau 15:02:19 - LMT 1867 Oct 18 41075267Swollman -8:57:41 - LMT 1900 Aug 20 12:00 41114343Swollman -8:00 - PST 1942 41214343Swollman -8:00 US P%sT 1946 41314343Swollman -8:00 - PST 1969 41414343Swollman -8:00 US P%sT 1983 Oct 30 2:00 415136638Swollman -9:00 US Y%sT 1983 Nov 30 41614343Swollman -9:00 US AK%sT 41775267SwollmanZone America/Yakutat 14:41:05 - LMT 1867 Oct 18 41875267Swollman -9:18:55 - LMT 1900 Aug 20 12:00 41914343Swollman -9:00 - YST 1942 42014343Swollman -9:00 US Y%sT 1946 42114343Swollman -9:00 - YST 1969 422136638Swollman -9:00 US Y%sT 1983 Nov 30 42314343Swollman -9:00 US AK%sT 42475267SwollmanZone America/Anchorage 14:00:24 - LMT 1867 Oct 18 42575267Swollman -9:59:36 - LMT 1900 Aug 20 12:00 42614343Swollman -10:00 - CAT 1942 427158421Swollman -10:00 US CAT/CAWT 1945 Aug 14 23:00u 428158421Swollman -10:00 US CAT/CAPT 1946 # Peace 42914343Swollman -10:00 - CAT 1967 Apr 43014343Swollman -10:00 - AHST 1969 43114343Swollman -10:00 US AH%sT 1983 Oct 30 2:00 432136638Swollman -9:00 US Y%sT 1983 Nov 30 43314343Swollman -9:00 US AK%sT 43475267SwollmanZone America/Nome 12:58:21 - LMT 1867 Oct 18 43575267Swollman -11:01:38 - LMT 1900 Aug 20 12:00 43614343Swollman -11:00 - NST 1942 43714343Swollman -11:00 US N%sT 1946 43814343Swollman -11:00 - NST 1967 Apr 43914343Swollman -11:00 - BST 1969 44014343Swollman -11:00 US B%sT 1983 Oct 30 2:00 441136638Swollman -9:00 US Y%sT 1983 Nov 30 44214343Swollman -9:00 US AK%sT 44375267SwollmanZone America/Adak 12:13:21 - LMT 1867 Oct 18 44475267Swollman -11:46:38 - LMT 1900 Aug 20 12:00 44514343Swollman -11:00 - NST 1942 44614343Swollman -11:00 US N%sT 1946 44714343Swollman -11:00 - NST 1967 Apr 44814343Swollman -11:00 - BST 1969 44914343Swollman -11:00 US B%sT 1983 Oct 30 2:00 450136638Swollman -10:00 US AH%sT 1983 Nov 30 45114343Swollman -10:00 US HA%sT 452149514Swollman# The following switches don't quite make our 1970 cutoff. 453149514Swollman# 45414343Swollman# Shanks writes that part of southwest Alaska (e.g. Aniak) 45514343Swollman# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 45614343Swollman# and another part (e.g. Akiak) made the same switch five weeks later. 457149514Swollman# 458149514Swollman# From David Flater (2004-11-09): 459149514Swollman# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 460149514Swollman# Historic Preservation Commission, provided this information, which 461149514Swollman# suggests that Unalaska deviated from statutory time from early 1967 462149514Swollman# possibly until 1983: 463149514Swollman# 464149514Swollman# Minutes of the Unalaska City Council Meeting, January 10, 1967: 465149514Swollman# "Except for St. Paul and Akutan, Unalaska is the only important 466149514Swollman# location not on Alaska Standard Time. The following resolution was 467149514Swollman# made by William Robinson and seconded by Henry Swanson: Be it 468149514Swollman# resolved that the City of Unalaska hereby goes to Alaska Standard 469149514Swollman# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 470149514Swollman# January 14, Alaska Standard Time.) This resolution was passed with 471149514Swollman# three votes for and one against." 4722742Swollman 47314343Swollman# Hawaii 47414343Swollman# 47514343Swollman# From Arthur David Olson: 47614343Swollman# And then there's Hawaii. 47714343Swollman# DST was observed for one day in 1933; 47814343Swollman# standard time was changed by half an hour in 1947; 47914343Swollman# it's always standard as of 1986. 48014343Swollman# 48114343Swollman# From Paul Eggert: 48214343Swollman# Shanks says the 1933 experiment lasted for three weeks. Go with Shanks. 48314343Swollman# 48414343SwollmanZone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00 48514343Swollman -10:30 - HST 1933 Apr 30 2:00 48614343Swollman -10:30 1:00 HDT 1933 May 21 2:00 48714343Swollman -10:30 US H%sT 1947 Jun 8 2:00 48814343Swollman -10:00 - HST 4892742Swollman 49014343Swollman# Now we turn to US areas that have diverged from the consensus since 1970. 49114343Swollman 49214343Swollman# Arizona mostly uses MST. 493114173Swollman 494114173Swollman# From Paul Eggert (2002-10-20): 495114173Swollman# 496114173Swollman# The information in the rest of this paragraph is derived from the 497114173Swollman# <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> 498114173Swollman# Daylight Saving Time web page (2002-01-23)</a> maintained by the 499114173Swollman# Arizona State Library, Archives and Public Records. 500114173Swollman# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 501114173Swollman# time, but by federal law railroads, airlines, bus lines, military 502114173Swollman# personnel, and some engaged in interstate commerce continued to 503114173Swollman# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 504114173Swollman# Gazette says that was the date the law changed, and that 04-01 was 505114173Swollman# the date the state's clocks would change. In 1945 the State of 506114173Swollman# Arizona used standard time all year, again with exceptions only as 507114173Swollman# mandated by federal law. Arizona observed DST in 1967, but Arizona 508114173Swollman# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 509114173Swollman# 510114173Swollman# Shanks says the 1944 experiment came to an end on 1944-03-17. 511114173Swollman# Go with the Arizona State Library instead. 512114173Swollman 513149514SwollmanZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 51414343Swollman -7:00 US M%sT 1944 Jan 1 00:01 515114173Swollman -7:00 - MST 1944 Apr 1 00:01 51614343Swollman -7:00 US M%sT 1944 Oct 1 00:01 51714343Swollman -7:00 - MST 1967 518114173Swollman -7:00 US M%sT 1968 Mar 21 51914343Swollman -7:00 - MST 52019878Swollman# From Arthur David Olson (1988-02-13): 52114343Swollman# A writer from the Inter Tribal Council of Arizona, Inc., 522136638Swollman# notes in private correspondence dated 1987-12-28 that "Presently, only the 5232742Swollman# Navajo Nation participates in the Daylight Saving Time policy, due to its 5242742Swollman# large size and location in three states." (The "only" means that other 5252742Swollman# tribal nations don't use DST.) 5262742Swollman 52714343SwollmanLink America/Denver America/Shiprock 5282742Swollman 529136638Swollman# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 530136638Swollman# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 531136638Swollman# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 532136638Swollman# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 533171948Sedwin# Teton, Twin Falls, Valley, Washington counties, and the southern 534171948Sedwin# quarter of Idaho county) and eastern Oregon (most of Malheur County) 535136638Swollman# switched four weeks late in 1974. 536149514Swollman# 53714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 538149514SwollmanZone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 53914343Swollman -8:00 US P%sT 1923 May 13 2:00 54014343Swollman -7:00 US M%sT 1974 54114343Swollman -7:00 - MST 1974 Feb 3 2:00 54214343Swollman -7:00 US M%sT 5432742Swollman 54414343Swollman# Indiana 54514343Swollman# 54658787Sru# For a map of Indiana's time zone regions, see: 54758787Sru# <a href="http://www.mccsc.edu/time.html"> 54858787Sru# What time is it in Indiana? 549158421Swollman# </a> (2006-03-01) 55058787Sru# 551171948Sedwin# From Paul Eggert (2007-08-17): 552149590Swollman# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 553149590Swollman# with the following exceptions: 554149590Swollman# 555149590Swollman# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 556149590Swollman# Vandenburgh, and Warrick counties have been like America/Chicago. 557149590Swollman# 558149590Swollman# - Dearborn and Ohio counties have been like America/New_York. 559149590Swollman# 560149590Swollman# - Clark, Floyd, and Harrison counties have been like 561149590Swollman# America/Kentucky/Louisville. 562149590Swollman# 563171948Sedwin# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 564171948Sedwin# and Switzerland counties have their own time zone histories as noted below. 565158421Swollman# 566158421Swollman# Shanks partitioned Indiana into 345 regions, each with its own time history, 567158421Swollman# and wrote ``Even newspaper reports present contradictory information.'' 568158421Swollman# Those Hoosiers! Such a flighty and changeable people! 56914343Swollman# Fortunately, most of the complexity occurred before our cutoff date of 1970. 57014343Swollman# 57114343Swollman# Other than Indianapolis, the Indiana place names are so nondescript 57214343Swollman# that they would be ambiguous if we left them at the `America' level. 57314343Swollman# So we reluctantly put them all in a subdirectory `America/Indiana'. 57475267Swollman 575149514Swollman# From Paul Eggert (2005-08-16): 576158421Swollman# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. 57775267Swollman 578158421Swollman# From Nathan Stratton Treadway (2006-03-30): 579158421Swollman# http://www.dot.gov/affairs/dot0406.htm [3705 B] 580158421Swollman# From Deborah Goldsmith (2006-01-18): 581158421Swollman# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB] 582158421Swollman# From Paul Eggert (2006-01-20): 583158421Swollman# It says "DOT is relocating the time zone boundary in Indiana to move Starke, 584158421Swollman# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 585158421Swollman# Eastern Time Zone to the Central Time Zone.... The effective date of 586158421Swollman# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the 587158421Swollman# changeover date from standard time to Daylight Saving Time." 588158421Swollman# Strictly speaking, this means the affected counties will change their 589158421Swollman# clocks twice that night, but this obviously is in error. The intent 590158421Swollman# is that 01:59:59 EST be followed by 02:00:00 CDT. 591158421Swollman 592169811Swollman# From Gwillim Law (2007-02-10): 593169811Swollman# The Associated Press has been reporting that Pulaski County, Indiana is 594169811Swollman# going to switch from Central to Eastern Time on March 11, 2007.... 595169811Swollman# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 596169811Swollman 59714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 59814343SwollmanRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 59914343SwollmanRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 60014343SwollmanRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 60114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 602149514SwollmanZone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 60314343Swollman -6:00 US C%sT 1920 60414343Swollman -6:00 Indianapolis C%sT 1942 60514343Swollman -6:00 US C%sT 1946 60614343Swollman -6:00 Indianapolis C%sT 1955 Apr 24 2:00 60714343Swollman -5:00 - EST 1957 Sep 29 2:00 60814343Swollman -6:00 - CST 1958 Apr 27 2:00 60914343Swollman -5:00 - EST 1969 61014343Swollman -5:00 US E%sT 1971 611149514Swollman -5:00 - EST 2006 612149514Swollman -5:00 US E%sT 6132742Swollman# 614158421Swollman# Eastern Crawford County, Indiana, left its clocks alone in 1974, 615158421Swollman# as well as from 1976 through 2005. 61614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 61714343SwollmanRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 61814343SwollmanRule Marengo 1951 only - Sep lastSun 2:00 0 S 61914343SwollmanRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 62014343SwollmanRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 62114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 622149514SwollmanZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 62314343Swollman -6:00 US C%sT 1951 62414343Swollman -6:00 Marengo C%sT 1961 Apr 30 2:00 62514343Swollman -5:00 - EST 1969 62614343Swollman -5:00 US E%sT 1974 Jan 6 2:00 62714343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 62814343Swollman -5:00 US E%sT 1976 629149514Swollman -5:00 - EST 2006 630149514Swollman -5:00 US E%sT 63114343Swollman# 632171948Sedwin# Daviess, Dubois, Knox, and Martin Counties, Indiana, 633171948Sedwin# switched from eastern to central time in April 2006, then switched back 634171948Sedwin# in November 2007. 635158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 636158421SwollmanRule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 637158421SwollmanRule Vincennes 1946 only - Sep lastSun 2:00 0 S 638158421SwollmanRule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 639158421SwollmanRule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 640158421SwollmanRule Vincennes 1955 only - May 1 0:00 1:00 D 641158421SwollmanRule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 642158421SwollmanRule Vincennes 1960 only - Oct lastSun 2:00 0 S 643158421SwollmanRule Vincennes 1961 only - Sep lastSun 2:00 0 S 644158421SwollmanRule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 645158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 646158421SwollmanZone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 647158421Swollman -6:00 US C%sT 1946 648158421Swollman -6:00 Vincennes C%sT 1964 Apr 26 2:00 649158421Swollman -5:00 - EST 1969 650158421Swollman -5:00 US E%sT 1971 651158421Swollman -5:00 - EST 2006 Apr 2 2:00 652171948Sedwin -6:00 US C%sT 2007 Nov 4 2:00 653171948Sedwin -5:00 US E%sT 654171948Sedwin# 655171948Sedwin# Perry County, Indiana, switched from eastern to central time in April 2006. 656171948Sedwin# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 657171948SedwinRule Perry 1946 only - Apr lastSun 2:00 1:00 D 658171948SedwinRule Perry 1946 only - Sep lastSun 2:00 0 S 659171948SedwinRule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 660171948SedwinRule Perry 1953 1959 - Sep lastSun 2:00 0 S 661171948SedwinRule Perry 1955 only - May 1 0:00 1:00 D 662171948SedwinRule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 663171948SedwinRule Perry 1960 only - Oct lastSun 2:00 0 S 664171948SedwinRule Perry 1961 only - Sep lastSun 2:00 0 S 665171948SedwinRule Perry 1962 1963 - Oct lastSun 2:00 0 S 666171948Sedwin# Zone NAME GMTOFF RULES FORMAT [UNTIL] 667171948SedwinZone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 668171948Sedwin -6:00 US C%sT 1946 669171948Sedwin -6:00 Perry C%sT 1964 Apr 26 2:00 670171948Sedwin -5:00 - EST 1969 671171948Sedwin -5:00 US E%sT 1971 672171948Sedwin -5:00 - EST 2006 Apr 2 2:00 673158421Swollman -6:00 US C%sT 674158421Swollman# 675158421Swollman# Pike County, Indiana moved from central to eastern time in 1977, 676171948Sedwin# then switched back in 2006, then switched back again in 2007. 677158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 678158421SwollmanRule Pike 1955 only - May 1 0:00 1:00 D 679158421SwollmanRule Pike 1955 1960 - Sep lastSun 2:00 0 S 680158421SwollmanRule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 681158421SwollmanRule Pike 1961 1964 - Oct lastSun 2:00 0 S 682158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 683158421SwollmanZone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 684158421Swollman -6:00 US C%sT 1955 685158421Swollman -6:00 Pike C%sT 1965 Apr 25 2:00 686158421Swollman -5:00 - EST 1966 Oct 30 2:00 687158421Swollman -6:00 US C%sT 1977 Oct 30 2:00 688158421Swollman -5:00 - EST 2006 Apr 2 2:00 689171948Sedwin -6:00 US C%sT 2007 Nov 4 2:00 690171948Sedwin -5:00 US E%sT 691158421Swollman# 692158421Swollman# Starke County, Indiana moved from central to eastern time in 1991, 693158421Swollman# then switched back in 2006. 69419878Swollman# From Arthur David Olson (1991-10-28): 69519878Swollman# An article on page A3 of the Sunday, 1991-10-27 Washington Post 69614343Swollman# notes that Starke County switched from Central time to Eastern time as of 69719878Swollman# 1991-10-27. 69814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 69914343SwollmanRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 70014343SwollmanRule Starke 1947 1954 - Sep lastSun 2:00 0 S 70114343SwollmanRule Starke 1955 1956 - Oct lastSun 2:00 0 S 70214343SwollmanRule Starke 1957 1958 - Sep lastSun 2:00 0 S 70314343SwollmanRule Starke 1959 1961 - Oct lastSun 2:00 0 S 70414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 705149514SwollmanZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 70614343Swollman -6:00 US C%sT 1947 70714343Swollman -6:00 Starke C%sT 1962 Apr 29 2:00 70814343Swollman -5:00 - EST 1963 Oct 27 2:00 70914343Swollman -6:00 US C%sT 1991 Oct 27 2:00 710158421Swollman -5:00 - EST 2006 Apr 2 2:00 711158421Swollman -6:00 US C%sT 71214343Swollman# 713169811Swollman# Pulaski County, Indiana, switched from eastern to central time in 714169811Swollman# April 2006 and then switched back in March 2007. 715169811Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 716169811SwollmanRule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 717169811SwollmanRule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 718169811SwollmanRule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 719169811SwollmanRule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 720169811Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 721169811SwollmanZone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 722169811Swollman -6:00 US C%sT 1946 723169811Swollman -6:00 Pulaski C%sT 1961 Apr 30 2:00 724169811Swollman -5:00 - EST 1969 725169811Swollman -5:00 US E%sT 1971 726169811Swollman -5:00 - EST 2006 Apr 2 2:00 727169811Swollman -6:00 US C%sT 2007 Mar 11 2:00 728169811Swollman -5:00 US E%sT 729169811Swollman# 730158421Swollman# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 73114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 732149514SwollmanZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 73314343Swollman -6:00 US C%sT 1954 Apr 25 2:00 73414343Swollman -5:00 - EST 1969 73514343Swollman -5:00 US E%sT 1973 736149514Swollman -5:00 - EST 2006 737149514Swollman -5:00 US E%sT 7382742Swollman 73914343Swollman# Part of Kentucky left its clocks alone in 1974. 740149590Swollman# This also includes Clark, Floyd, and Harrison counties in Indiana. 74114343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 74214343SwollmanRule Louisville 1921 only - May 1 2:00 1:00 D 74314343SwollmanRule Louisville 1921 only - Sep 1 2:00 0 S 74414343SwollmanRule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 74514343SwollmanRule Louisville 1941 only - Sep lastSun 2:00 0 S 74614343SwollmanRule Louisville 1946 only - Jun 2 2:00 0 S 74714343SwollmanRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 74814343SwollmanRule Louisville 1956 1960 - Oct lastSun 2:00 0 S 74914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 750149514SwollmanZone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 75114343Swollman -6:00 US C%sT 1921 75214343Swollman -6:00 Louisville C%sT 1942 75314343Swollman -6:00 US C%sT 1946 75414343Swollman -6:00 Louisville C%sT 1961 Jul 23 2:00 75514343Swollman -5:00 - EST 1968 75614343Swollman -5:00 US E%sT 1974 Jan 6 2:00 75714343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 75814343Swollman -5:00 US E%sT 75967578Swollman# 760158421Swollman# Wayne County, Kentucky 76158787Sru# 76258787Sru# From 76358787Sru# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 76458787Sru# Lake Cumberland LIFE 76558787Sru# </a> (1999-01-29) via WKYM-101.7: 76658787Sru# Clinton County has joined Wayne County in asking the DoT to change from 76758787Sru# the Central to the Eastern time zone.... The Wayne County government made 76858787Sru# the same request in December. And while Russell County officials have not 76958787Sru# taken action, the majority of respondents to a poll conducted there in 77058787Sru# August indicated they would like to change to "fast time" also. 77158787Sru# The three Lake Cumberland counties are the farthest east of any U.S. 77258787Sru# location in the Central time zone. 77367578Swollman# 77467578Swollman# From Rich Wales (2000-08-29): 77567578Swollman# After prolonged debate, and despite continuing deep differences of opinion, 77667578Swollman# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 77775267Swollman# (-0500) time. They won't "fall back" this year. See Sara Shipley, 77875267Swollman# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 77986222Swollman# 78086222Swollman# From Paul Eggert (2001-07-16): 78186222Swollman# The final rule was published in the 78286222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> 78386222Swollman# Federal Register 65, 160 (2000-08-17), page 50154-50158. 78486222Swollman# </a> 785114173Swollman# 786149514SwollmanZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 78767578Swollman -6:00 US C%sT 1946 78867578Swollman -6:00 - CST 1968 78967578Swollman -6:00 US C%sT 2000 Oct 29 2:00 79067578Swollman -5:00 US E%sT 7912742Swollman 79267578Swollman 79367578Swollman# From Rives McDow (2000-08-30): 79467578Swollman# Here ... are all the changes in the US since 1985. 79567578Swollman# Kearny County, KS (put all of county on central; 79667578Swollman# previously split between MST and CST) ... 1990-10 79767578Swollman# Starke County, IN (from CST to EST) ... 1991-10 79867578Swollman# Oliver County, ND (from MST to CST) ... 1992-10 79967578Swollman# West Wendover, NV (from PST TO MST) ... 1999-10 80067578Swollman# Wayne County, KY (from CST to EST) ... 2000-10 80167578Swollman# 80286222Swollman# From Paul Eggert (2001-07-17): 80386222Swollman# We don't know where the line used to be within Kearny County, KS, 80486222Swollman# so omit that change for now. 80586222Swollman# See America/Indiana/Knox for the Starke County, IN change. 80686222Swollman# See America/North_Dakota/Center for the Oliver County, ND change. 80786222Swollman# West Wendover, NV officially switched from Pacific to mountain time on 80886222Swollman# 1999-10-31. See the 80986222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> 81086222Swollman# Federal Register 64, 203 (1999-10-21), page 56705-56707. 81186222Swollman# </a> 81286222Swollman# However, the Federal Register says that West Wendover already operated 81386222Swollman# on mountain time, and the rule merely made this official; 81486222Swollman# hence a separate tz entry is not needed. 81567578Swollman 81614343Swollman# Michigan 81714343Swollman# 81819878Swollman# From Bob Devine (1988-01-28): 81914343Swollman# Michigan didn't observe DST from 1968 to 1973. 82014343Swollman# 82158787Sru# From Paul Eggert (1999-03-31): 82258787Sru# Shanks writes that Michigan started using standard time on 1885-09-18, 82358787Sru# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 82458787Sru# that Detroit kept 82514343Swollman# 82614343Swollman# local time until 1900 when the City Council decreed that clocks should 82714343Swollman# be put back twenty-eight minutes to Central Standard Time. Half the 82814343Swollman# city obeyed, half refused. After considerable debate, the decision 82914343Swollman# was rescinded and the city reverted to Sun time. A derisive offer to 83014343Swollman# erect a sundial in front of the city hall was referred to the 83114343Swollman# Committee on Sewers. Then, in 1905, Central time was adopted 83214343Swollman# by city vote. 83314343Swollman# 83414343Swollman# This story is too entertaining to be false, so go with Howse over Shanks. 83514343Swollman# 83675267Swollman# From Paul Eggert (2001-03-06): 83775267Swollman# Garland (1927) writes ``Cleveland and Detroit advanced their clocks 83875267Swollman# one hour in 1914.'' This change is not in Shanks. We have no more 83975267Swollman# info, so omit this for now. 84075267Swollman# 84114343Swollman# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 84214343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 84314343SwollmanRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 84414343SwollmanRule Detroit 1948 only - Sep lastSun 2:00 0 S 84514343SwollmanRule Detroit 1967 only - Jun 14 2:00 1:00 D 84614343SwollmanRule Detroit 1967 only - Oct lastSun 2:00 0 S 84714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 84814343SwollmanZone America/Detroit -5:32:11 - LMT 1905 84914343Swollman -6:00 - CST 1915 May 15 2:00 85014343Swollman -5:00 - EST 1942 85114343Swollman -5:00 US E%sT 1946 85214343Swollman -5:00 Detroit E%sT 1973 85314343Swollman -5:00 US E%sT 1975 85414343Swollman -5:00 - EST 1975 Apr 27 2:00 85514343Swollman -5:00 US E%sT 85614343Swollman# 857158421Swollman# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 858158421Swollman# switched from EST to CST/CDT in 1973. 85914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 86014343SwollmanRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 86114343SwollmanRule Menominee 1946 only - Sep lastSun 2:00 0 S 86214343SwollmanRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 86314343SwollmanRule Menominee 1966 only - Oct lastSun 2:00 0 S 86414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 86514343SwollmanZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 86614343Swollman -6:00 US C%sT 1946 86714343Swollman -6:00 Menominee C%sT 1969 Apr 27 2:00 86814343Swollman -5:00 - EST 1973 Apr 29 2:00 86914343Swollman -6:00 US C%sT 87014343Swollman 8712742Swollman# Navassa 87286222Swollman# administered by the US Fish and Wildlife Service 87343543Swollman# claimed by US under the provisions of the 1856 Guano Islands Act 87443543Swollman# also claimed by Haiti 87543543Swollman# occupied 1857/1900 by the Navassa Phosphate Co 87686222Swollman# US lighthouse 1917/1996-09 87743543Swollman# currently uninhabited 87843543Swollman# see Mark Fineman, ``An Isle Rich in Guano and Discord'', 87943543Swollman# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 88043543Swollman# Jimmy Skaggs, _The Great Guano Rush_ (1994). 88114343Swollman 8822742Swollman################################################################################ 8832742Swollman 8842742Swollman 885158421Swollman# From Paul Eggert (2006-03-22): 886158421Swollman# A good source for time zone historical data outside the U.S. is 887158421Swollman# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 888158421Swollman# San Diego: ACS Publications, Inc. (2003). 8892742Swollman# 89086222Swollman# Gwillim Law writes that a good source 89120094Swollman# for recent time zone data is the International Air Transport 89220094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 89320094Swollman# published semiannually. Law sent in several helpful summaries 89420094Swollman# of the IATA's data after 1990. 89520094Swollman# 896158421Swollman# Except where otherwise noted, Shanks & Pottenger is the source for 897158421Swollman# entries through 1990, and IATA SSIM is the source for entries afterwards. 89820094Swollman# 899121098Swollman# Other sources occasionally used include: 9002742Swollman# 901121098Swollman# Edward W. Whitman, World Time Differences, 902121098Swollman# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 903121098Swollman# which I found in the UCLA library. 904121098Swollman# 905121098Swollman# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> 906121098Swollman# William Willett, The Waste of Daylight, 19th edition 907121098Swollman# </a> (1914-03) 908121098Swollman# 9099908Swollman# See the `europe' file for Greenland. 9102742Swollman 9112742Swollman# Canada 9122742Swollman 913149514Swollman# From Alain LaBont<e'> (1994-11-14): 9149908Swollman# I post here the time zone abbreviations standardized in Canada 9159908Swollman# for both English and French in the CAN/CSA-Z234.4-89 standard.... 9169908Swollman# 9179908Swollman# UTC Standard time Daylight savings time 9189908Swollman# offset French English French English 9199908Swollman# -2:30 - - HAT NDT 9209908Swollman# -3 - - HAA ADT 9219908Swollman# -3:30 HNT NST - - 9229908Swollman# -4 HNA AST HAE EDT 9239908Swollman# -5 HNE EST HAC CDT 9249908Swollman# -6 HNC CST HAR MDT 9259908Swollman# -7 HNR MST HAP PDT 9269908Swollman# -8 HNP PST HAY YDT 9279908Swollman# -9 HNY YST - - 9289908Swollman# 9299908Swollman# HN: Heure Normale ST: Standard Time 9309908Swollman# HA: Heure Avanc<e'>e DT: Daylight saving Time 9319908Swollman# 9329908Swollman# A: de l'Atlantique Atlantic 9339908Swollman# C: du Centre Central 9349908Swollman# E: de l'Est Eastern 9359908Swollman# M: Mountain 9369908Swollman# N: Newfoundland 9379908Swollman# P: du Pacifique Pacific 9389908Swollman# R: des Rocheuses 9399908Swollman# T: de Terre-Neuve 9409908Swollman# Y: du Yukon Yukon 9419908Swollman# 942149514Swollman# From Paul Eggert (1994-11-22): 9439908Swollman# Alas, this sort of thing must be handled by localization software. 9442742Swollman 945158421Swollman# Unless otherwise specified, the data for Canada are all from Shanks 946158421Swollman# & Pottenger. 9479908Swollman 948169811Swollman# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 949169811Swollman# 2007-03-01): 950158421Swollman# The British Columbia government announced yesterday that it will 951158421Swollman# adjust daylight savings next year to align with changes in the 952158421Swollman# U.S. and the rest of Canada.... 953158421Swollman# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 954169811Swollman# ... 955169811Swollman# Nova Scotia 956163302Sru# Daylight saving time will be extended by four weeks starting in 2007.... 957169811Swollman# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 958169811Swollman# 959163302Sru# [For New Brunswick] the new legislation dictates that the time change is to 960163302Sru# be done at 02:00 instead of 00:01. 961163302Sru# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 962163302Sru# ... 963163302Sru# Manitoba has traditionally changed the clock every fall at 03:00. 964163302Sru# As of 2006, the transition is to take place one hour earlier at 02:00. 965163302Sru# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 966163302Sru# ... 967163302Sru# [Alberta, Ontario, Quebec] will follow US rules. 968169811Swollman# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 969163302Sru# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 970169811Swollman# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 971163302Sru# ... 972169811Swollman# P.E.I. will follow US rules.... 973169811Swollman# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 974163302Sru# ... 975169811Swollman# Province of Newfoundland and Labrador.... 976169811Swollman# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 977163302Sru# ... 978169811Swollman# Yukon 979169811Swollman# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 980169811Swollman# ... 981163302Sru# N.W.T. will follow US rules. Whoever maintains the government web site 982163302Sru# does not seem to believe in bookmarks. To see the news release, click the 983163302Sru# following link and search for "Daylight Savings Time Change". Press the 984163302Sru# "Daylight Savings Time Change" link; it will fire off a popup using 985163302Sru# JavaScript. 986163302Sru# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 987169811Swollman# ... 988169811Swollman# Nunavut 989169811Swollman# An amendment to the Interpretation Act was registered on February 19/2007.... 990169811Swollman# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 991163302Sru 992158421Swollman# From Paul Eggert (2006-04-25): 99367578Swollman# H. David Matthews and Mary Vincent's map 994153761Swollman# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp"> 99567578Swollman# "It's about TIME", _Canadian Geographic_ (September-October 1998) 99667578Swollman# </a> contains detailed boundaries for regions observing nonstandard 99767578Swollman# time and daylight saving time arrangements in Canada circa 1998. 99867578Swollman# 999153761Swollman# INMS, the Institute for National Measurement Standards in Ottawa, has <a 1000153761Swollman# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php"> 100167578Swollman# information about standard and daylight saving time zones in Canada. 100267578Swollman# </a> (updated periodically). 100367578Swollman# Its unofficial information is often taken from Matthews and Vincent. 10049908Swollman 1005163302Sru# From Paul Eggert (2006-06-27): 1006163302Sru# For now, assume all of DST-observing Canada will fall into line with the 1007163302Sru# new US DST rules, 1008163302Sru 10092742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 101017200SwollmanRule Canada 1918 only - Apr 14 2:00 1:00 D 101117200SwollmanRule Canada 1918 only - Oct 31 2:00 0 S 1012121098SwollmanRule Canada 1942 only - Feb 9 2:00 1:00 W # War 1013121098SwollmanRule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 101417200SwollmanRule Canada 1945 only - Sep 30 2:00 0 S 101517200SwollmanRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1016153761SwollmanRule Canada 1974 2006 - Oct lastSun 2:00 0 S 1017153761SwollmanRule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1018153761SwollmanRule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1019153761SwollmanRule Canada 2007 max - Nov Sun>=1 2:00 0 S 102017200Swollman 102117200Swollman 1022163302Sru# Newfoundland and Labrador 102317200Swollman 102467578Swollman# From Paul Eggert (2000-10-02): 102567578Swollman# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 102667578Swollman# but the only part of Labrador that follows the rules is the 102767578Swollman# southeast corner, including Port Hope Simpson and Mary's Harbour, 102867578Swollman# but excluding, say, Black Tickle. 102967578Swollman 103017200Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1031121098SwollmanRule StJohns 1917 only - Apr 8 2:00 1:00 D 10322742SwollmanRule StJohns 1917 only - Sep 17 2:00 0 S 1033158421Swollman# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 10342742SwollmanRule StJohns 1919 only - May 5 23:00 1:00 D 10352742SwollmanRule StJohns 1919 only - Aug 12 23:00 0 S 1036158421Swollman# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 10372742SwollmanRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 10382742SwollmanRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1039158421Swollman# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1040158421Swollman# Pottenger. 1041121098SwollmanRule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1042121098SwollmanRule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1043121098Swollman# Whitman gives the following transitions: 1044121098Swollman# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1045158421Swollman# but go with Shanks & Pottenger and assume they used Canadian rules. 10462742Swollman# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1047158421Swollman# Apr 30 - Sep 24; go with Shanks & Pottenger. 10482742SwollmanRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 10492742SwollmanRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 10502742SwollmanRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 10512742SwollmanRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 105267578SwollmanRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 105367578Swollman# From Paul Eggert (2000-10-02): 105467578Swollman# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 105567578Swollman# at 00:01 local time. For now, assume it started in 1987. 105667578SwollmanRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1057158421SwollmanRule StJohns 1987 2006 - Oct lastSun 0:01 0 S 105867578SwollmanRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1059158421SwollmanRule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1060158421SwollmanRule StJohns 2007 max - Mar Sun>=8 0:01 1:00 D 1061158421SwollmanRule StJohns 2007 max - Nov Sun>=1 0:01 0 S 1062158421Swollman# 10632742Swollman# St John's has an apostrophe, but Posix file names can't have apostrophes. 10642742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10652742SwollmanZone America/St_Johns -3:30:52 - LMT 1884 1066121098Swollman -3:30:52 StJohns N%sT 1918 1067121098Swollman -3:30:52 Canada N%sT 1919 106820094Swollman -3:30:52 StJohns N%sT 1935 Mar 30 1069121098Swollman -3:30 StJohns N%sT 1942 May 11 1070121098Swollman -3:30 Canada N%sT 1946 10712742Swollman -3:30 StJohns N%sT 10722742Swollman 107367578Swollman# most of east Labrador 107417200Swollman 107520094Swollman# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. 107620094Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 107720094SwollmanZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1078121098Swollman -3:30:52 - NST 1918 1079121098Swollman -3:30:52 Canada N%sT 1919 108020094Swollman -3:30:52 - NST 1935 Mar 30 108120094Swollman -3:30 - NST 1936 1082121098Swollman -3:30 StJohns N%sT 1942 May 11 1083121098Swollman -3:30 Canada N%sT 1946 108420094Swollman -3:30 StJohns N%sT 1966 Mar 15 2:00 108520094Swollman -4:00 StJohns A%sT 108620094Swollman 108720094Swollman 1088158421Swollman# west Labrador, Nova Scotia, Prince Edward I 108920094Swollman 1090158421Swollman# From Paul Eggert (2006-03-22): 1091158421Swollman# Shanks & Pottenger write that since 1970 most of this region has been like 1092158421Swollman# Halifax. Many locales did not observe peacetime DST until 1972; 109317200Swollman# Glace Bay, NS is the largest that we know of. 1094158421Swollman# Shanks & Pottenger also write that Liverpool, NS was the only town 1095158421Swollman# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1096158421Swollman# this is a typo. 109717200Swollman 10982742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1099158421SwollmanRule Halifax 1916 only - Apr 1 0:00 1:00 D 1100158421SwollmanRule Halifax 1916 only - Oct 1 0:00 0 S 1101158421SwollmanRule Halifax 1920 only - May 9 0:00 1:00 D 1102158421SwollmanRule Halifax 1920 only - Aug 29 0:00 0 S 1103158421SwollmanRule Halifax 1921 only - May 6 0:00 1:00 D 1104158421SwollmanRule Halifax 1921 1922 - Sep 5 0:00 0 S 1105158421SwollmanRule Halifax 1922 only - Apr 30 0:00 1:00 D 1106158421SwollmanRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1107158421SwollmanRule Halifax 1923 only - Sep 4 0:00 0 S 1108158421SwollmanRule Halifax 1924 only - Sep 15 0:00 0 S 1109158421SwollmanRule Halifax 1925 only - Sep 28 0:00 0 S 1110158421SwollmanRule Halifax 1926 only - May 16 0:00 1:00 D 1111158421SwollmanRule Halifax 1926 only - Sep 13 0:00 0 S 1112158421SwollmanRule Halifax 1927 only - May 1 0:00 1:00 D 1113158421SwollmanRule Halifax 1927 only - Sep 26 0:00 0 S 1114158421SwollmanRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1115158421SwollmanRule Halifax 1928 only - Sep 9 0:00 0 S 1116158421SwollmanRule Halifax 1929 only - Sep 3 0:00 0 S 1117158421SwollmanRule Halifax 1930 only - Sep 15 0:00 0 S 1118158421SwollmanRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1119158421SwollmanRule Halifax 1932 only - May 1 0:00 1:00 D 1120158421SwollmanRule Halifax 1933 only - Apr 30 0:00 1:00 D 1121158421SwollmanRule Halifax 1933 only - Oct 2 0:00 0 S 1122158421SwollmanRule Halifax 1934 only - May 20 0:00 1:00 D 1123158421SwollmanRule Halifax 1934 only - Sep 16 0:00 0 S 1124158421SwollmanRule Halifax 1935 only - Jun 2 0:00 1:00 D 1125158421SwollmanRule Halifax 1935 only - Sep 30 0:00 0 S 1126158421SwollmanRule Halifax 1936 only - Jun 1 0:00 1:00 D 1127158421SwollmanRule Halifax 1936 only - Sep 14 0:00 0 S 1128158421SwollmanRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1129158421SwollmanRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1130158421SwollmanRule Halifax 1939 only - May 28 0:00 1:00 D 1131158421SwollmanRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1132158421SwollmanRule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1133158421SwollmanRule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1134158421SwollmanRule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1135158421SwollmanRule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1136158421SwollmanRule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1137158421SwollmanRule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1138158421SwollmanRule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1139158421SwollmanRule Halifax 1962 1973 - Oct lastSun 2:00 0 S 11402742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 11412742SwollmanZone America/Halifax -4:14:24 - LMT 1902 Jun 15 1142121098Swollman -4:00 Halifax A%sT 1918 1143121098Swollman -4:00 Canada A%sT 1919 1144121098Swollman -4:00 Halifax A%sT 1942 Feb 9 2:00s 1145121098Swollman -4:00 Canada A%sT 1946 1146121098Swollman -4:00 Halifax A%sT 1974 1147121098Swollman -4:00 Canada A%sT 114817200SwollmanZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 114917200Swollman -4:00 Canada A%sT 1953 115017200Swollman -4:00 Halifax A%sT 1954 115117200Swollman -4:00 - AST 1972 1152121098Swollman -4:00 Halifax A%sT 1974 1153121098Swollman -4:00 Canada A%sT 11542742Swollman 1155158421Swollman# New Brunswick 11568029Swollman 1157169811Swollman# From Paul Eggert (2007-01-31): 1158169811Swollman# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1159169811Swollman# says they changed at 00:01 through 2006, and 1160158421Swollman# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1161169811Swollman# clear that this was the case since at least 1993. 1162163302Sru# For now, assume it started in 1993. 1163158421Swollman 1164158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1165158421SwollmanRule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1166158421SwollmanRule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1167158421SwollmanRule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1168158421SwollmanRule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1169158421SwollmanRule Moncton 1939 only - May 27 1:00 1:00 D 1170158421SwollmanRule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1171158421SwollmanRule Moncton 1940 only - May 19 1:00 1:00 D 1172158421SwollmanRule Moncton 1941 only - May 4 1:00 1:00 D 1173158421SwollmanRule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1174158421SwollmanRule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1175158421SwollmanRule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1176158421SwollmanRule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1177158421SwollmanRule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1178158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1179158421SwollmanZone America/Moncton -4:19:08 - LMT 1883 Dec 9 1180158421Swollman -5:00 - EST 1902 Jun 15 1181158421Swollman -4:00 Canada A%sT 1933 1182158421Swollman -4:00 Moncton A%sT 1942 1183158421Swollman -4:00 Canada A%sT 1946 1184158421Swollman -4:00 Moncton A%sT 1973 1185158421Swollman -4:00 Canada A%sT 1993 1186163302Sru -4:00 Moncton A%sT 2007 1187163302Sru -4:00 Canada A%sT 1188158421Swollman 1189163302Sru# Quebec 119017200Swollman 1191163302Sru# From Paul Eggert (2006-07-09): 1192163302Sru# Shanks & Pottenger write that since 1970 most of Quebec has been 1193163302Sru# like Montreal. 1194163302Sru 1195163302Sru# From Paul Eggert (2006-06-27): 1196163302Sru# Matthews and Vincent (1998) also write that Quebec east of the -63 1197163302Sru# meridian is supposed to observe AST, but residents as far east as 1198163302Sru# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1199163302Sru# In "Official time in Quebec" the Quebec department of justice writes in 1200163302Sru# http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm 1201163302Sru# that "The residents of the Municipality of the 1202163302Sru# Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin, 1203163302Sru# Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is 1204163302Sru# written and use Atlantic standard time all year round. The same applies to 1205163302Sru# the residents of the Native facilities along the lower North Shore." 1206163302Sru# <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm> 1207163302Sru# says this common practice was codified into law as of 2007. 1208163302Sru# For lack of better info, guess this practice began around 1970, contra to 1209163302Sru# Shanks & Pottenger who have this region observing AST/ADT. 1210163302Sru 1211163302Sru# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1212163302SruRule Mont 1917 only - Mar 25 2:00 1:00 D 1213163302SruRule Mont 1917 only - Apr 24 0:00 0 S 1214163302SruRule Mont 1919 only - Mar 31 2:30 1:00 D 1215163302SruRule Mont 1919 only - Oct 25 2:30 0 S 1216163302SruRule Mont 1920 only - May 2 2:30 1:00 D 1217163302SruRule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 1218163302SruRule Mont 1921 only - May 1 2:00 1:00 D 1219163302SruRule Mont 1922 only - Apr 30 2:00 1:00 D 1220163302SruRule Mont 1924 only - May 17 2:00 1:00 D 1221163302SruRule Mont 1924 1926 - Sep lastSun 2:30 0 S 1222163302SruRule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1223163302Sru# The 1927-to-1937 rules can be expressed more simply as 1224163302Sru# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1225163302Sru# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 1226163302Sru# The rules below avoid use of 24:00 1227163302Sru# (which pre-1998 versions of zic cannot handle). 1228163302SruRule Mont 1927 only - May 1 0:00 1:00 D 1229163302SruRule Mont 1927 1932 - Sep lastSun 0:00 0 S 1230163302SruRule Mont 1928 1931 - Apr lastSun 0:00 1:00 D 1231163302SruRule Mont 1932 only - May 1 0:00 1:00 D 1232163302SruRule Mont 1933 1940 - Apr lastSun 0:00 1:00 D 1233163302SruRule Mont 1933 only - Oct 1 0:00 0 S 1234163302SruRule Mont 1934 1939 - Sep lastSun 0:00 0 S 1235163302SruRule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 1236163302SruRule Mont 1945 1948 - Sep lastSun 2:00 0 S 1237163302SruRule Mont 1949 1950 - Oct lastSun 2:00 0 S 1238163302SruRule Mont 1951 1956 - Sep lastSun 2:00 0 S 1239163302SruRule Mont 1957 1973 - Oct lastSun 2:00 0 S 1240163302Sru 1241163302Sru# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1242163302SruZone America/Blanc-Sablon -3:48:28 - LMT 1884 1243163302Sru -4:00 Canada A%sT 1970 1244163302Sru -4:00 - AST 1245163302SruZone America/Montreal -4:54:16 - LMT 1884 1246163302Sru -5:00 Mont E%sT 1918 1247163302Sru -5:00 Canada E%sT 1919 1248163302Sru -5:00 Mont E%sT 1942 Feb 9 2:00s 1249163302Sru -5:00 Canada E%sT 1946 1250163302Sru -5:00 Mont E%sT 1974 1251163302Sru -5:00 Canada E%sT 1252163302Sru 1253163302Sru 1254163302Sru# Ontario 1255163302Sru 1256163302Sru# From Paul Eggert (2006-07-09): 1257163302Sru# Shanks & Pottenger write that since 1970 most of Ontario has been like 1258163302Sru# Toronto. 125917200Swollman# Thunder Bay skipped DST in 1973. 126017200Swollman# Many smaller locales did not observe peacetime DST until 1974; 126117200Swollman# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 126217200Swollman# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 126317200Swollman 1264121098Swollman# From Mark Brader (2003-07-26): 1265121098Swollman# [According to the Toronto Star] Orillia, Ontario, adopted DST 1266121098Swollman# effective Saturday, 1912-06-22, 22:00; the article mentions that 1267121098Swollman# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1268121098Swollman# have already done so. In Orillia DST was to run until Saturday, 1269121098Swollman# 1912-08-31 (no time mentioned), but it was met with considerable 1270121098Swollman# hostility from certain segments of the public, and was revoked after 1271121098Swollman# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but 1272121098Swollman# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1273121098Swollman# earlier in June). 1274121098Swollman# 1275121098Swollman# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1276121098Swollman 127743014Swollman# From Paul Eggert (1997-10-17): 1278121098Swollman# Mark Brader writes that an article in the 1997-10-14 Toronto Star 127943014Swollman# says that Atikokan, Ontario currently does not observe DST, 128043014Swollman# but will vote on 11-10 whether to use EST/EDT. 128143014Swollman# He also writes that the 128243014Swollman# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 128343014Swollman# Ontario Time Act (1990, Chapter T.9) 128443014Swollman# </a> 128543014Swollman# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 128643014Swollman# Officially Atikokan is therefore on CST/CDT, and most likely this report 128743014Swollman# concerns a non-official time observed as a matter of local practice. 1288158421Swollman# 128967578Swollman# From Paul Eggert (2000-10-02): 129067578Swollman# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 129167578Swollman# New Osnaburgh observe CST all year, that Big Trout Lake observes 129267578Swollman# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 129367578Swollman# violation of the official Ontario rules. 1294163302Sru# 1295163302Sru# From Paul Eggert (2006-07-09): 1296163302Sru# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1297163302Sru# 2005-07-21 Chronicle-Journal, which said: 1298163302Sru# 1299163302Sru# The clocks in Atikokan stay set on standard time year-round. 1300163302Sru# This means they spend about half the time on central time and 1301163302Sru# the other half on eastern time. 1302163302Sru# 1303163302Sru# For the most part, the system works, Mayor Dennis Brown said. 1304163302Sru# 1305163302Sru# "The majority of businesses in Atikokan deal more with Eastern 1306163302Sru# Canada, but there are some that deal with Western Canada," he 1307163302Sru# said. "I don't see any changes happening here." 1308163302Sru# 1309163302Sru# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1310163302Sru# [New Osnaburgh] follow the same practice." 131167578Swollman 1312163302Sru# From Garry McKinnon (2006-07-14) via Chris Walton: 1313163302Sru# I chatted with a member of my board who has an outstanding memory 1314163302Sru# and a long history in Atikokan (and in the telecom industry) and he 1315163302Sru# can say for certain that Atikokan has been practicing the current 1316163302Sru# time keeping since 1952, at least. 1317163302Sru 1318163302Sru# From Paul Eggert (2006-07-17): 1319163302Sru# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1320163302Sru# ever since standard time was introduced, but the information from 1321163302Sru# McKinnon sounds more authoritative. For now, assume that Atikokan 1322163302Sru# switched to EST immediately after WWII era daylight saving time 1323163302Sru# ended. This matches the old (less-populous) America/Coral_Harbour 1324163302Sru# entry since our cutoff date of 1970, so we can move 1325163302Sru# America/Coral_Harbour to the 'backward' file. 1326163302Sru 1327210718Sedwin# From Mark Brader (2010-03-06): 1328210718Sedwin# 1329210718Sedwin# Currently the database has: 1330210718Sedwin# 1331210718Sedwin# # Ontario 1332210718Sedwin# 1333210718Sedwin# # From Paul Eggert (2006-07-09): 1334210718Sedwin# # Shanks & Pottenger write that since 1970 most of Ontario has been like 1335210718Sedwin# # Toronto. 1336210718Sedwin# # Thunder Bay skipped DST in 1973. 1337210718Sedwin# # Many smaller locales did not observe peacetime DST until 1974; 1338210718Sedwin# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1339210718Sedwin# 1340210718Sedwin# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1341210718Sedwin# right corner of page 1, it says that Toronto will return to standard 1342210718Sedwin# time at 2 am Sunday morning (which agrees with the database), and that: 1343210718Sedwin# 1344210718Sedwin# The one-hour setback will go into effect throughout most of Ontario, 1345210718Sedwin# except in areas like Windsor which remains on standard time all year. 1346210718Sedwin# 1347210718Sedwin# Windsor is, of course, a lot larger than Nipigon. 1348210718Sedwin# 1349210718Sedwin# I only came across this incidentally. I don't know if Windsor began 1350210718Sedwin# observing DST when Detroit did, or in 1974, or on some other date. 1351210718Sedwin# 1352210718Sedwin# By the way, the article continues by noting that: 1353210718Sedwin# 1354210718Sedwin# Some cities in the United States have pushed the deadline back 1355210718Sedwin# three weeks and will change over from daylight saving in October. 1356210718Sedwin 1357210718Sedwin# From Arthur David Olson (2010-07-17): 1358210718Sedwin# 1359210718Sedwin# "Standard Time and Time Zones in Canada" appeared in 1360210718Sedwin# The Journal of The Royal Astronomical Society of Canada, 1361210718Sedwin# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1362210718Sedwin# was available at 1363210718Sedwin# <a href="http://adsabs.harvard.edu/full/1932JRASC..26...49S"> 1364210718Sedwin# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1365210718Sedwin# </a> 1366210718Sedwin# 1367210718Sedwin# It includes the text below (starting on page 57): 1368210718Sedwin# 1369210718Sedwin# A list of the places in Canada using daylight saving time would 1370210718Sedwin# require yearly revision. From information kindly furnished by 1371210718Sedwin# the provincial governments and by the postmasters in many cities 1372210718Sedwin# and towns, it is found that the following places used daylight sav- 1373210718Sedwin# ing in 1930. The information for the province of Quebec is definite, 1374210718Sedwin# for the other provinces only approximate: 1375210718Sedwin# 1376210718Sedwin# Province Daylight saving time used 1377210718Sedwin# Prince Edward Island Not used. 1378210718Sedwin# Nova Scotia In Halifax only. 1379210718Sedwin# New Brunswick In St. John only. 1380210718Sedwin# Quebec In the following places: 1381210718Sedwin# Montreal Lachine 1382210718Sedwin# Quebec Mont-Royal 1383210718Sedwin# Levis Iberville 1384210718Sedwin# St. Lambert Cap de la Madeleine 1385210718Sedwin# Verdun Loretteville 1386210718Sedwin# Westmount Richmond 1387210718Sedwin# Outremont St. Jerome 1388210718Sedwin# Longueuil Greenfield Park 1389210718Sedwin# Arvida Waterloo 1390210718Sedwin# Chambly-Canton Beaulieu 1391210718Sedwin# Melbourne La Tuque 1392210718Sedwin# St. Theophile Buckingham 1393210718Sedwin# Ontario Used generally in the cities and towns along 1394210718Sedwin# the southerly part of the province. Not 1395210718Sedwin# used in the northwesterlhy part. 1396210718Sedwin# Manitoba Not used. 1397210718Sedwin# Saskatchewan In Regina only. 1398210718Sedwin# Alberta Not used. 1399210718Sedwin# British Columbia Not used. 1400210718Sedwin# 1401210718Sedwin# With some exceptions, the use of daylight saving may be said to be limited 1402210718Sedwin# to those cities and towns lying between Quebec city and Windsor, Ont. 1403210718Sedwin 14042742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1405121098SwollmanRule Toronto 1919 only - Mar 30 23:30 1:00 D 1406121098SwollmanRule Toronto 1919 only - Oct 26 0:00 0 S 1407121098SwollmanRule Toronto 1920 only - May 2 2:00 1:00 D 1408121098SwollmanRule Toronto 1920 only - Sep 26 0:00 0 S 1409121098SwollmanRule Toronto 1921 only - May 15 2:00 1:00 D 1410121098SwollmanRule Toronto 1921 only - Sep 15 2:00 0 S 1411121098SwollmanRule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1412158421Swollman# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1413158421Swollman# was meant. 1414121098SwollmanRule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1415121098SwollmanRule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1416136638Swollman# The 1927-to-1939 rules can be expressed more simply as 1417136638Swollman# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1418136638Swollman# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1419136638Swollman# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1420136638Swollman# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1421136638Swollman# The rules below avoid use of Sun>=25 1422136638Swollman# (which pre-2004 versions of zic cannot handle). 1423136638SwollmanRule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1424136638SwollmanRule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1425136638SwollmanRule Toronto 1932 only - May 1 2:00 1:00 D 1426136638SwollmanRule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1427136638SwollmanRule Toronto 1933 only - Oct 1 2:00 0 S 1428136638SwollmanRule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1429121098SwollmanRule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1430121098SwollmanRule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1431121098SwollmanRule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1432121098SwollmanRule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1433121098SwollmanRule Toronto 1949 only - Nov lastSun 0:00 0 S 1434121098SwollmanRule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1435121098SwollmanRule Toronto 1950 only - Nov lastSun 2:00 0 S 1436121098SwollmanRule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1437158421Swollman# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1438163302Sru# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1439163302Sru# is wrong, and that he had confirmed it by checking the 1971-10-30 1440163302Sru# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1441121098SwollmanRule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1442121098Swollman 1443121098Swollman# From Paul Eggert (2003-07-27): 1444121098Swollman# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1445121098Swollman# Port Arthur, Ontario, the principle of the Bill has been in 1446121098Swollman# operation for the past three years, and in the City of Moose Jaw, 1447136638Swollman# Saskatchewan, for one year." 1448121098Swollman 1449136638Swollman# From David Bryan via Tory Tronrud, Director/Curator, 1450136638Swollman# Thunder Bay Museum (2003-11-12): 1451136638Swollman# There is some suggestion, however, that, by-law or not, daylight 1452136638Swollman# savings time was being practiced in Fort William and Port Arthur 1453136638Swollman# before 1909.... [I]n 1910, the line between the Eastern and Central 1454136638Swollman# Time Zones was permanently moved about two hundred miles west to 1455136638Swollman# include the Thunder Bay area.... When Canada adopted daylight 1456136638Swollman# savings time in 1916, Fort William and Port Arthur, having done so 1457136638Swollman# already, did not change their clocks.... During the Second World 1458136638Swollman# War,... [t]he cities agreed to implement DST during the summer 1459136638Swollman# months for the remainder of the war years. 1460136638Swollman 14612742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1462121098SwollmanZone America/Toronto -5:17:32 - LMT 1895 1463121098Swollman -5:00 Canada E%sT 1919 1464121098Swollman -5:00 Toronto E%sT 1942 Feb 9 2:00s 1465121098Swollman -5:00 Canada E%sT 1946 1466121098Swollman -5:00 Toronto E%sT 1974 1467121098Swollman -5:00 Canada E%sT 146817200SwollmanZone America/Thunder_Bay -5:57:00 - LMT 1895 1469136638Swollman -6:00 - CST 1910 1470136638Swollman -5:00 - EST 1942 147117200Swollman -5:00 Canada E%sT 1970 147217200Swollman -5:00 Mont E%sT 1973 147317200Swollman -5:00 - EST 1974 147417200Swollman -5:00 Canada E%sT 147517200SwollmanZone America/Nipigon -5:53:04 - LMT 1895 1476121098Swollman -5:00 Canada E%sT 1940 Sep 29 1477121098Swollman -5:00 1:00 EDT 1942 Feb 9 2:00s 147817200Swollman -5:00 Canada E%sT 1479163302SruZone America/Rainy_River -6:18:16 - LMT 1895 1480121098Swollman -6:00 Canada C%sT 1940 Sep 29 1481121098Swollman -6:00 1:00 CDT 1942 Feb 9 2:00s 148217200Swollman -6:00 Canada C%sT 1483163302SruZone America/Atikokan -6:06:28 - LMT 1895 1484163302Sru -6:00 Canada C%sT 1940 Sep 29 1485163302Sru -6:00 1:00 CDT 1942 Feb 9 2:00s 1486163302Sru -6:00 Canada C%sT 1945 Sep 30 2:00 1487163302Sru -5:00 - EST 14882742Swollman 14898029Swollman 149017200Swollman# Manitoba 149119878Swollman 1492158421Swollman# From Rob Douglas (2006-04-06): 1493158421Swollman# the old Manitoba Time Act - as amended by Bill 2, assented to 1494158421Swollman# March 27, 1987 ... said ... 1495158421Swollman# "between two o'clock Central Standard Time in the morning of 1496158421Swollman# the first Sunday of April of each year and two o'clock Central 1497158421Swollman# Standard Time in the morning of the last Sunday of October next 1498158421Swollman# following, one hour in advance of Central Standard Time."... 1499158421Swollman# I believe that the English legislation [of the old time act] had = 1500158421Swollman# been assented to (March 22, 1967).... 1501158421Swollman# Also, as far as I can tell, there was no order-in-council varying 1502158421Swollman# the time of Daylight Saving Time for 2005 and so the provisions of 1503158421Swollman# the 1987 version would apply - the changeover was at 2:00 Central 1504158421Swollman# Standard Time (i.e. not until 3:00 Central Daylight Time). 1505158421Swollman 1506158421Swollman# From Paul Eggert (2006-04-10): 1507158421Swollman# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1508158421Swollman# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1509158421Swollman# it was also 02:00s in 1966. 1510158421Swollman 15112742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 15122742SwollmanRule Winn 1916 only - Apr 23 0:00 1:00 D 15132742SwollmanRule Winn 1916 only - Sep 17 0:00 0 S 15142742SwollmanRule Winn 1918 only - Apr 14 2:00 1:00 D 15152742SwollmanRule Winn 1918 only - Oct 31 2:00 0 S 15162742SwollmanRule Winn 1937 only - May 16 2:00 1:00 D 151714343SwollmanRule Winn 1937 only - Sep 26 2:00 0 S 1518121098SwollmanRule Winn 1942 only - Feb 9 2:00 1:00 W # War 1519121098SwollmanRule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 15202742SwollmanRule Winn 1945 only - Sep lastSun 2:00 0 S 15212742SwollmanRule Winn 1946 only - May 12 2:00 1:00 D 15222742SwollmanRule Winn 1946 only - Oct 13 2:00 0 S 15232742SwollmanRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 152414343SwollmanRule Winn 1947 1949 - Sep lastSun 2:00 0 S 152514343SwollmanRule Winn 1950 only - May 1 2:00 1:00 D 152614343SwollmanRule Winn 1950 only - Sep 30 2:00 0 S 152714343SwollmanRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 152814343SwollmanRule Winn 1951 1958 - Sep lastSun 2:00 0 S 15292742SwollmanRule Winn 1959 only - Oct lastSun 2:00 0 S 15302742SwollmanRule Winn 1960 only - Sep lastSun 2:00 0 S 15312742SwollmanRule Winn 1963 only - Apr lastSun 2:00 1:00 D 153214343SwollmanRule Winn 1963 only - Sep 22 2:00 0 S 1533158421SwollmanRule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1534158421SwollmanRule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1535158421SwollmanRule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 15362742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15372742SwollmanZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1538158421Swollman -6:00 Winn C%sT 2006 1539158421Swollman -6:00 Canada C%sT 15402742Swollman 15418029Swollman 154217200Swollman# Saskatchewan 154317200Swollman 1544121098Swollman# From Mark Brader (2003-07-26): 1545121098Swollman# The first actual adoption of DST in Canada was at the municipal 1546121098Swollman# level. As the [Toronto] Star put it (1912-06-07), "While people 1547121098Swollman# elsewhere have long been talking of legislation to save daylight, 1548121098Swollman# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1549121098Swollman# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1550121098Swollman# presumably late evening, as below), and would run until "the end of 1551121098Swollman# the summer". The discrepancy between municipal time and railroad 1552121098Swollman# time was noted. 1553121098Swollman 1554121098Swollman# From Paul Eggert (2003-07-27): 1555121098Swollman# Willett (1914-03) notes that DST "has been in operation ... in the 1556121098Swollman# City of Moose Jaw, Saskatchewan, for one year." 1557121098Swollman 1558158421Swollman# From Paul Eggert (2006-03-22): 1559158421Swollman# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 156017200Swollman# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 156117200Swollman# Other western towns (e.g. Lloydminster) are like Edmonton. 156267578Swollman# Matthews and Vincent (1998) write that Denare Beach and Creighton 156367578Swollman# are like Winnipeg, in violation of Saskatchewan law. 156417200Swollman 1565149514Swollman# From W. Jones (1992-11-06): 156617200Swollman# The. . .below is based on information I got from our law library, the 156717200Swollman# provincial archives, and the provincial Community Services department. 156817200Swollman# A precise history would require digging through newspaper archives, and 156917200Swollman# since you didn't say what you wanted, I didn't bother. 157017200Swollman# 157117200Swollman# Saskatchewan is split by a time zone meridian (105W) and over the years 157217200Swollman# the boundary became pretty ragged as communities near it reevaluated 157317200Swollman# their affiliations in one direction or the other. In 1965 a provincial 157417200Swollman# referendum favoured legislating common time practices. 157517200Swollman# 157617200Swollman# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 157717200Swollman# Saskatchewan 1978) was proclaimed, and established that the eastern 157817200Swollman# part of Saskatchewan would use CST year round, that districts in 157917200Swollman# northwest Saskatchewan would by default follow CST but could opt to 158017200Swollman# follow Mountain Time rules (thus 1 hour difference in the winter and 158117200Swollman# zero in the summer), and that districts in southwest Saskatchewan would 158217200Swollman# by default follow MT but could opt to follow CST. 158317200Swollman# 158417200Swollman# It took a few years for the dust to settle (I know one story of a town 158517200Swollman# on one time zone having its school in another, such that a mom had to 158617200Swollman# serve her family lunch in two shifts), but presently it seems that only 158717200Swollman# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 158817200Swollman# rules any more; all other districts appear to have used CST year round 158917200Swollman# since sometime in the 1960s. 159017200Swollman 1591163302Sru# From Chris Walton (2006-06-26): 1592163302Sru# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1593163302Sru# long and rather painful to read. 1594163302Sru# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1595163302Sru 15962742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 15972742SwollmanRule Regina 1918 only - Apr 14 2:00 1:00 D 15982742SwollmanRule Regina 1918 only - Oct 31 2:00 0 S 15992742SwollmanRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 16002742SwollmanRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 16012742SwollmanRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 16022742SwollmanRule Regina 1937 only - Oct Sun>=8 0:00 0 S 16032742SwollmanRule Regina 1938 only - Oct Sun>=1 0:00 0 S 16042742SwollmanRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1605121098SwollmanRule Regina 1942 only - Feb 9 2:00 1:00 W # War 1606121098SwollmanRule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 16072742SwollmanRule Regina 1945 only - Sep lastSun 2:00 0 S 160817200SwollmanRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 160917200SwollmanRule Regina 1946 only - Oct Sun>=8 2:00 0 S 1610121098SwollmanRule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1611121098SwollmanRule Regina 1947 1957 - Sep lastSun 2:00 0 S 1612121098SwollmanRule Regina 1959 only - Apr lastSun 2:00 1:00 D 161317200SwollmanRule Regina 1959 only - Oct lastSun 2:00 0 S 161417200Swollman# 161517200SwollmanRule Swift 1957 only - Apr lastSun 2:00 1:00 D 161617200SwollmanRule Swift 1957 only - Oct lastSun 2:00 0 S 161717200SwollmanRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 161817200SwollmanRule Swift 1959 only - Oct lastSun 2:00 0 S 161917200SwollmanRule Swift 1960 1961 - Sep lastSun 2:00 0 S 16202742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 162117200SwollmanZone America/Regina -6:58:36 - LMT 1905 Sep 162217200Swollman -7:00 Regina M%sT 1960 Apr lastSun 2:00 16232742Swollman -6:00 - CST 162417200SwollmanZone America/Swift_Current -7:11:20 - LMT 1905 Sep 162517200Swollman -7:00 Canada M%sT 1946 Apr lastSun 2:00 162617200Swollman -7:00 Regina M%sT 1950 162717200Swollman -7:00 Swift M%sT 1972 Apr lastSun 2:00 162817200Swollman -6:00 - CST 16292742Swollman 16308029Swollman 163117200Swollman# Alberta 163217200Swollman 16332742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16342742SwollmanRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 16352742SwollmanRule Edm 1918 only - Oct 31 2:00 0 S 16362742SwollmanRule Edm 1919 only - May 27 2:00 0 S 16372742SwollmanRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 16382742SwollmanRule Edm 1920 only - Oct lastSun 2:00 0 S 16392742SwollmanRule Edm 1921 1923 - Sep lastSun 2:00 0 S 1640121098SwollmanRule Edm 1942 only - Feb 9 2:00 1:00 W # War 1641121098SwollmanRule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 16422742SwollmanRule Edm 1945 only - Sep lastSun 2:00 0 S 16432742SwollmanRule Edm 1947 only - Apr lastSun 2:00 1:00 D 16442742SwollmanRule Edm 1947 only - Sep lastSun 2:00 0 S 16452742SwollmanRule Edm 1967 only - Apr lastSun 2:00 1:00 D 16462742SwollmanRule Edm 1967 only - Oct lastSun 2:00 0 S 16472742SwollmanRule Edm 1969 only - Apr lastSun 2:00 1:00 D 16482742SwollmanRule Edm 1969 only - Oct lastSun 2:00 0 S 16492742SwollmanRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1650158421SwollmanRule Edm 1972 2006 - Oct lastSun 2:00 0 S 16512742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16522742SwollmanZone America/Edmonton -7:33:52 - LMT 1906 Sep 1653158421Swollman -7:00 Edm M%sT 1987 1654158421Swollman -7:00 Canada M%sT 16552742Swollman 16568029Swollman 165717200Swollman# British Columbia 165817200Swollman 1659158421Swollman# From Paul Eggert (2006-03-22): 1660158421Swollman# Shanks & Pottenger write that since 1970 most of this region has 1661158421Swollman# been like Vancouver. 166258787Sru# Dawson Creek uses MST. Much of east BC is like Edmonton. 166367578Swollman# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 166417200Swollman 16652742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16662742SwollmanRule Vanc 1918 only - Apr 14 2:00 1:00 D 16672742SwollmanRule Vanc 1918 only - Oct 31 2:00 0 S 1668121098SwollmanRule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1669121098SwollmanRule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 16702742SwollmanRule Vanc 1945 only - Sep 30 2:00 0 S 16712742SwollmanRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 16722742SwollmanRule Vanc 1946 only - Oct 13 2:00 0 S 16732742SwollmanRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1674158421SwollmanRule Vanc 1962 2006 - Oct lastSun 2:00 0 S 16752742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16762742SwollmanZone America/Vancouver -8:12:28 - LMT 1884 1677158421Swollman -8:00 Vanc P%sT 1987 1678158421Swollman -8:00 Canada P%sT 167917200SwollmanZone America/Dawson_Creek -8:00:56 - LMT 1884 168017200Swollman -8:00 Canada P%sT 1947 168117200Swollman -8:00 Vanc P%sT 1972 Aug 30 2:00 168217200Swollman -7:00 - MST 16832742Swollman 16848029Swollman 168558787Sru# Northwest Territories, Nunavut, Yukon 168617200Swollman 1687158421Swollman# From Paul Eggert (2006-03-22): 168817200Swollman# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1689149514Swollman# Mathew Englander (1996-10-07) gives the following refs: 169020094Swollman# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 169120094Swollman# c. 7 defines Yukon standard time as UTC-9. This is still valid; 169220094Swollman# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 169320094Swollman# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 169420094Swollman# * O.I.C. 1980/02 established DST. 169520094Swollman# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1696158421Swollman# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1697158421Swollman# with Englander. 1698163302Sru# From Chris Walton (2006-06-26): 1699163302Sru# Here is a link to the old daylight saving portion of the interpretation 1700163302Sru# act which was last updated in 1987: 1701163302Sru# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf 170217200Swollman 170358787Sru# From Rives McDow (1999-09-04): 170458787Sru# Nunavut ... moved ... to incorporate the whole territory into one time zone. 170558787Sru# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 170658787Sru# Nunavut moves to single time zone Oct. 31 170758787Sru# </a> 170858787Sru# 170958787Sru# From Antoine Leca (1999-09-06): 171058787Sru# We then need to create a new timezone for the Kitikmeot region of Nunavut 171158787Sru# to differentiate it from the Yellowknife region. 171258787Sru 171358787Sru# From Paul Eggert (1999-09-20): 171458787Sru# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 171558787Sru# Basic Facts: The New Territory 171686222Swollman# </a> (1999) reports that Pangnirtung operates on eastern time, 171758787Sru# and that Coral Harbour does not observe DST. We don't know when 171886222Swollman# Pangnirtung switched to eastern time; we'll guess 1995. 171958787Sru 172058787Sru# From Rives McDow (1999-11-08): 172158787Sru# On October 31, when the rest of Nunavut went to Central time, 172258787Sru# Pangnirtung wobbled. Here is the result of their wobble: 172358787Sru# 172458787Sru# The following businesses and organizations in Pangnirtung use Central Time: 172558787Sru# 172658787Sru# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 172758787Sru# Eastern Arctic National Parks, A & D Specialist 172858787Sru# 172958787Sru# The following businesses and organizations in Pangnirtung use Eastern Time: 173058787Sru# 173158787Sru# Hamlet office, All other businesses, Both schools, Airport operator 173258787Sru# 173358787Sru# This has made for an interesting situation there, which warranted the news. 173458787Sru# No one there that I spoke with seems concerned, or has plans to 173558787Sru# change the local methods of keeping time, as it evidently does not 173658787Sru# really interfere with any activities or make things difficult locally. 173758787Sru# They plan to celebrate New Year's turn-over twice, one hour apart, 173858787Sru# so it appears that the situation will last at least that long. 173958787Sru# The Nunavut Intergovernmental Affairs hopes that they will "come to 174058787Sru# their senses", but the locals evidently don't see any problem with 174158787Sru# the current state of affairs. 174258787Sru 174358787Sru# From Michaela Rodrigue, writing in the 174458787Sru# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 174558787Sru# Nunatsiaq News (1999-11-19)</a>: 174658787Sru# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 174758787Sru# central - or Nunavut time - for government offices, and eastern time 174858787Sru# for municipal offices and schools.... Igloolik [was similar but then] 174958787Sru# made the switch to central time on Saturday, Nov. 6. 175058787Sru 175167578Swollman# From Paul Eggert (2000-10-02): 175267578Swollman# Matthews and Vincent (1998) say the following, but we lack histories 175367578Swollman# for these potential new Zones. 175475267Swollman# 175567578Swollman# The Canadian Forces station at Alert uses Eastern Time while the 175667578Swollman# handful of residents at the Eureka weather station [in the Central 175767578Swollman# zone] skip daylight savings. Baffin Island, which is crossed by the 175867578Swollman# Central, Eastern and Atlantic Time zones only uses Eastern Time. 175967578Swollman# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 176067578Swollman# Central Time and Southampton Island [in the Central zone] is not 176167578Swollman# required to use daylight savings. 176267578Swollman 176375267Swollman# From 176475267Swollman# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> 176575267Swollman# Nunavut now has two time zones 176675267Swollman# </a> (2000-11-10): 176775267Swollman# The Nunavut government would allow its employees in Kugluktuk and 176875267Swollman# Cambridge Bay to operate on central time year-round, putting them 176975267Swollman# one hour behind the rest of Nunavut for six months during the winter. 177075267Swollman# At the end of October the two communities had rebelled against 177175267Swollman# Nunavut's unified time zone, refusing to shift to eastern time with 177275267Swollman# the rest of the territory for the winter. Cambridge Bay remained on 177375267Swollman# central time, while Kugluktuk, even farther west, reverted to 177475267Swollman# mountain time, which they had used before the advent of Nunavut's 177575267Swollman# unified time zone in 1999. 177675267Swollman# 177775267Swollman# From Rives McDow (2001-01-20), quoting the Nunavut government: 177875267Swollman# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 177975267Swollman 178075267Swollman# From Paul Eggert (2000-12-04): 178175267Swollman# Let's just keep track of the official times for now. 178275267Swollman 178375267Swollman# From Rives McDow (2001-03-07): 178475267Swollman# The premier of Nunavut has issued a ministerial statement advising 178575267Swollman# that effective 2001-04-01, the territory of Nunavut will revert 178675267Swollman# back to three time zones (mountain, central, and eastern). Of the 178775267Swollman# cities in Nunavut, Coral Harbor is the only one that I know of that 178875267Swollman# has said it will not observe dst, staying on EST year round. I'm 178975267Swollman# checking for more info, and will get back to you if I come up with 179075267Swollman# more. 179175267Swollman# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 179275267Swollman 1793149514Swollman# From Gwillim Law (2005-05-21): 1794149514Swollman# According to maps at 1795149514Swollman# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg 1796149514Swollman# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg 1797149514Swollman# (both dated 2003), and 1798149514Swollman# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 1799149514Swollman# (from a 1998 Canadian Geographic article), the de facto and de jure time 1800149514Swollman# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 1801149514Swollman# round. Using Google, it's easy to find other websites that confirm this. 1802149514Swollman# I wasn't able to find how far back this time regimen goes, but since it 1803149514Swollman# predates the creation of Nunavut, it probably goes back many years.... 1804149514Swollman# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 1805149514Swollman# 1806149514Swollman# From Paul Eggert (2005-07-26): 1807149514Swollman# For lack of better information, assume that Southampton Island observed 1808149514Swollman# daylight saving only during wartime. 1809149514Swollman 1810169811Swollman# From Chris Walton (2007-03-01): 1811169811Swollman# ... the community of Resolute (located on Cornwallis Island in 1812169811Swollman# Nunavut) moved from Central Time to Eastern Time last November. 1813169811Swollman# Basically the community did not change its clocks at the end of 1814169811Swollman# daylight saving.... 1815169811Swollman# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 1816163302Sru 1817169811Swollman# From Chris Walton (2007-03-14): 1818169811Swollman# Today I phoned the "hamlet office" to find out what Resolute was doing with 1819169811Swollman# its clocks. 1820169811Swollman# 1821169811Swollman# The individual that answered the phone confirmed that the clocks did not 1822169811Swollman# move at the end of daylight saving on October 29/2006. He also told me that 1823169811Swollman# the clocks did not move this past weekend (March 11/2007).... 1824169811Swollman 1825187588Sedwin# From Chris Walton (2008-11-13): 1826187588Sedwin# ...the residents of Resolute believe that they are changing "time zones" 1827187588Sedwin# twice a year. In winter months, local time is qualified with "Eastern 1828187588Sedwin# Time" which is really "Eastern Standard Time (UTC-5)". In summer 1829187588Sedwin# months, local time is qualified with "Central Time" which is really 1830187588Sedwin# "Central Daylight Time (UTC-5)"... 1831187588Sedwin 18322742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 183317200SwollmanRule NT_YK 1918 only - Apr 14 2:00 1:00 D 183417200SwollmanRule NT_YK 1918 only - Oct 27 2:00 0 S 183517200SwollmanRule NT_YK 1919 only - May 25 2:00 1:00 D 183617200SwollmanRule NT_YK 1919 only - Nov 1 0:00 0 S 1837121098SwollmanRule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 1838121098SwollmanRule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 183917200SwollmanRule NT_YK 1945 only - Sep 30 2:00 0 S 184017200SwollmanRule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 184117200SwollmanRule NT_YK 1965 only - Oct lastSun 2:00 0 S 184217200SwollmanRule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 1843158421SwollmanRule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 1844158421SwollmanRule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 18452742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1846169811Swollman# aka Panniqtuuq 1847169811SwollmanZone America/Pangnirtung 0 - zzz 1921 # trading post est. 184858787Sru -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 184958787Sru -5:00 Canada E%sT 1999 Oct 31 2:00 185075267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 185175267Swollman -5:00 Canada E%sT 1852169811Swollman# formerly Frobisher Bay 1853169811SwollmanZone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 185458787Sru -5:00 NT_YK E%sT 1999 Oct 31 2:00 185575267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 185675267Swollman -5:00 Canada E%sT 1857169811Swollman# aka Qausuittuq 1858187588Sedwin# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1859187588SedwinRule Resolute 2006 max - Nov Sun>=1 2:00 0 ES 1860187588SedwinRule Resolute 2007 max - Mar Sun>=8 2:00 0 CD 1861169811SwollmanZone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 186275267Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 186375267Swollman -5:00 - EST 2001 Apr 1 3:00 1864169811Swollman -6:00 Canada C%sT 2006 Oct 29 2:00 1865187588Sedwin -5:00 Resolute %sT 1866169811Swollman# aka Kangiqiniq 1867169811SwollmanZone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 1868169811Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 1869169811Swollman -5:00 - EST 2001 Apr 1 3:00 187058787Sru -6:00 Canada C%sT 1871169811Swollman# aka Iqaluktuuttiaq 1872169811SwollmanZone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 187358787Sru -7:00 NT_YK M%sT 1999 Oct 31 2:00 187475267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 187575267Swollman -5:00 - EST 2000 Nov 5 0:00 187675267Swollman -6:00 - CST 2001 Apr 1 3:00 187775267Swollman -7:00 Canada M%sT 1878169811SwollmanZone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 1879158421Swollman -7:00 NT_YK M%sT 1980 1880158421Swollman -7:00 Canada M%sT 1881169811SwollmanZone America/Inuvik 0 - zzz 1953 # Inuvik founded 188217200Swollman -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 1883158421Swollman -7:00 NT_YK M%sT 1980 1884158421Swollman -7:00 Canada M%sT 18852742SwollmanZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 188617200Swollman -9:00 NT_YK Y%sT 1966 Jul 1 2:00 1887158421Swollman -8:00 NT_YK P%sT 1980 1888158421Swollman -8:00 Canada P%sT 188917200SwollmanZone America/Dawson -9:17:40 - LMT 1900 Aug 20 189020094Swollman -9:00 NT_YK Y%sT 1973 Oct 28 0:00 1891158421Swollman -8:00 NT_YK P%sT 1980 1892158421Swollman -8:00 Canada P%sT 18932742Swollman 18948029Swollman 18952742Swollman############################################################################### 18962742Swollman 18972742Swollman# Mexico 18982742Swollman 189975267Swollman# From Paul Eggert (2001-03-05): 190075267Swollman# The Investigation and Analysis Service of the 190175267Swollman# Mexican Library of Congress (MLoC) has published a 190275267Swollman# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> 190375267Swollman# history of Mexican local time (in Spanish) 190475267Swollman# </a>. 19052742Swollman# 1906158421Swollman# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 190775267Swollman# (In all cases we go with the MLoC.) 1908158421Swollman# S&P report that Baja was at -8:00 in 1922/1923. 1909158421Swollman# S&P say the 1930 transition in Baja was 1930-11-16. 1910158421Swollman# S&P report no DST during summer 1931. 1911158421Swollman# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 19122742Swollman 191375267Swollman# From Gwillim Law (2001-02-20): 191475267Swollman# There are some other discrepancies between the Decrees page and the 191575267Swollman# tz database. I think they can best be explained by supposing that 191675267Swollman# the researchers who prepared the Decrees page failed to find some of 191775267Swollman# the relevant documents. 191875267Swollman 1919149514Swollman# From Alan Perry (1996-02-15): 192017200Swollman# A guy from our Mexico subsidiary finally found the Presidential Decree 192117200Swollman# outlining the timezone changes in Mexico. 192258787Sru# 192317200Swollman# ------------- Begin Forwarded Message ------------- 192458787Sru# 192517200Swollman# I finally got my hands on the Official Presidential Decree that sets up the 192617200Swollman# rules for the DST changes. The rules are: 192758787Sru# 192817200Swollman# 1. The country is divided in 3 timezones: 192917200Swollman# - Baja California Norte (the Mexico/BajaNorte TZ) 193017200Swollman# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 193117200Swollman# - The rest of the country (the Mexico/General TZ) 193258787Sru# 193317200Swollman# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 193417200Swollman# at 2:00 AM, the times in each zone are as follows: 193517200Swollman# BajaNorte: GMT+7 193617200Swollman# BajaSur: GMT+6 193717200Swollman# General: GMT+5 193858787Sru# 193917200Swollman# 3. The rest of the year, the times are as follows: 194017200Swollman# BajaNorte: GMT+8 194117200Swollman# BajaSur: GMT+7 194217200Swollman# General: GMT+6 194358787Sru# 194417200Swollman# The Decree was published in Mexico's Official Newspaper on January 4th. 194558787Sru# 194617200Swollman# -------------- End Forwarded Message -------------- 194717200Swollman# From Paul Eggert (1996-06-12): 194843014Swollman# For an English translation of the decree, see 194943014Swollman# <a href="http://mexico-travel.com/extra/timezone_eng.html"> 195043014Swollman# ``Diario Oficial: Time Zone Changeover'' (1996-01-04). 195143014Swollman# </a> 195214343Swollman 195343543Swollman# From Rives McDow (1998-10-08): 195443543Swollman# The State of Quintana Roo has reverted back to central STD and DST times 195543543Swollman# (i.e. UTC -0600 and -0500 as of 1998-08-02). 195643543Swollman 195758787Sru# From Rives McDow (2000-01-10): 195858787Sru# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 195958787Sru# zone 5 hours from the International Date Line, and will not observe daylight 196058787Sru# savings time so as to stay on the same time zone as the southern part of 196158787Sru# Arizona year round. 196258787Sru 196375267Swollman# From Jesper Norgaard, translating 196475267Swollman# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 196575267Swollman# In Oaxaca, the 55.000 teachers from the Section 22 of the National 196675267Swollman# Syndicate of Education Workers, refuse to apply daylight saving each 196775267Swollman# year, so that the more than 10,000 schools work at normal hour the 196875267Swollman# whole year. 196975267Swollman 197075267Swollman# From Gwillim Law (2001-01-19): 197175267Swollman# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 197275267Swollman# (translated):... 197375267Swollman# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 197475267Swollman# that Summer Time will be reduced from seven to five months, starting 197575267Swollman# this year.... 197675267Swollman# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 197775267Swollman# [translated], says "summer time will ... take effect on the first Sunday 197875267Swollman# in May, and end on the last Sunday of September. 197975267Swollman 198075267Swollman# From Arthur David Olson (2001-01-25): 198175267Swollman# The 2001-01-24 traditional Washington Post contained the page one 198275267Swollman# story "Timely Issue Divides Mexicans."... 198375267Swollman# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 198475267Swollman# ... Mexico City Mayor Lopez Obrador "...is threatening to keep 198575267Swollman# Mexico City and its 20 million residents on a different time than 198675267Swollman# the rest of the country..." In particular, Lopez Obrador would abolish 198775267Swollman# observation of Daylight Saving Time. 198875267Swollman 198975267Swollman# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> 199075267Swollman# Official statute published by the Energy Department 199175267Swollman# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 199275267Swollman# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). 199375267Swollman 199475267Swollman# From Paul Eggert (2001-03-03): 199575267Swollman# 199675267Swollman# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> 199775267Swollman# James F. Smith writes in today's LA Times 199875267Swollman# </a> 199975267Swollman# * Sonora will continue to observe standard time. 200075267Swollman# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that 200175267Swollman# the Federal District will not adopt DST. 200275267Swollman# * 4 of 16 district leaders announced they'll ignore the decree. 200375267Swollman# * The decree does not affect federal-controlled facilities including 200475267Swollman# the airport, banks, hospitals, and schools. 200575267Swollman# 200675267Swollman# For now we'll assume that the Federal District will bow to federal rules. 200775267Swollman 200875267Swollman# From Jesper Norgaard (2001-04-01): 200975267Swollman# I found some references to the Mexican application of daylight 201075267Swollman# saving, which modifies what I had already sent you, stating earlier 201175267Swollman# that a number of northern Mexican states would go on daylight 201275267Swollman# saving. The modification reverts this to only cover Baja California 201375267Swollman# (Norte), while all other states (except Sonora, who has no daylight 201475267Swollman# saving all year) will follow the original decree of president 201575267Swollman# Vicente Fox, starting daylight saving May 6, 2001 and ending 201675267Swollman# September 30, 2001. 201775267Swollman# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> 201875267Swollman# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 201975267Swollman 202086222Swollman# From Reuters (2001-09-04): 202186222Swollman# Mexico's Supreme Court on Tuesday declared that daylight savings was 202286222Swollman# unconstitutional in Mexico City, creating the possibility the 202386222Swollman# capital will be in a different time zone from the rest of the nation 202486222Swollman# next year.... The Supreme Court's ruling takes effect at 2:00 202586222Swollman# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 202686222Swollman# standard time. "This is so residents of the Federal District are not 202786222Swollman# subject to unexpected time changes," a statement from the court said. 202886222Swollman 202993799Swollman# From Jesper Norgaard Welen (2002-03-12): 203093799Swollman# ... consulting my local grocery store(!) and my coworkers, they all insisted 203193799Swollman# that a new decision had been made to reinstate US style DST in Mexico.... 203293799Swollman# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 203393799Swollman# confirms this. Sonora as usual is the only state where DST is not applied. 203493799Swollman 2035203019Sedwin# From Steffen Thorsen (2009-12-28): 2036203019Sedwin# 2037203019Sedwin# Steffen Thorsen wrote: 2038203019Sedwin# > Mexico's House of Representatives has approved a proposal for northern 2039203019Sedwin# > Mexico's border cities to share the same daylight saving schedule as 2040203019Sedwin# > the United States. 2041203019Sedwin# Now this has passed both the Congress and the Senate, so starting from 2042203019Sedwin# 2010, some border regions will be the same: 2043203019Sedwin# <a href="http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/"> 2044203019Sedwin# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2045203019Sedwin# </a> 2046203019Sedwin# <a href="http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939"> 2047203019Sedwin# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2048203019Sedwin# </a> 2049203019Sedwin# (Spanish) 2050203019Sedwin# 2051203019Sedwin# Could not find the new law text, but the proposed law text changes are here: 2052203019Sedwin# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf"> 2053203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2054203019Sedwin# </a> 2055203019Sedwin# (Gaceta Parlamentaria) 2056203019Sedwin# 2057203019Sedwin# There is also a list of the votes here: 2058203019Sedwin# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html"> 2059203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2060203019Sedwin# </a> 2061203019Sedwin# 2062203019Sedwin# Our page: 2063203019Sedwin# <a href="http://www.timeanddate.com/news/time/north-mexico-dst-change.html"> 2064203019Sedwin# http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2065203019Sedwin# </a> 2066203019Sedwin 2067203019Sedwin# From Arthur David Olson (2010-01-20): 2068203019Sedwin# The page 2069203019Sedwin# <a href="http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010"> 2070203019Sedwin# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2071203019Sedwin# </a> 2072203019Sedwin# includes this text: 2073203019Sedwin# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2074203019Sedwin# Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2075203019Sedwin# Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2076203019Sedwin# Tamaulipas, la aplicación de este horario estacional surtirá efecto 2077203019Sedwin# desde las dos horas del segundo domingo de marzo y concluirá a las dos 2078203019Sedwin# horas del primer domingo de noviembre. 2079203019Sedwin# En los municipios fronterizos que se encuentren ubicados en la franja 2080203019Sedwin# fronteriza norte en el territorio comprendido entre la línea 2081203019Sedwin# internacional y la línea paralela ubicada a una distancia de veinte 2082203019Sedwin# kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2083203019Sedwin# interior del país, la aplicación de este horario estacional surtirá 2084203019Sedwin# efecto desde las dos horas del segundo domingo de marzo y concluirá a 2085203019Sedwin# las dos horas del primer domingo de noviembre. 2086203019Sedwin 20872742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 20882742SwollmanRule Mexico 1939 only - Feb 5 0:00 1:00 D 20892742SwollmanRule Mexico 1939 only - Jun 25 0:00 0 S 20902742SwollmanRule Mexico 1940 only - Dec 9 0:00 1:00 D 20912742SwollmanRule Mexico 1941 only - Apr 1 0:00 0 S 2092121098SwollmanRule Mexico 1943 only - Dec 16 0:00 1:00 W # War 20932742SwollmanRule Mexico 1944 only - May 1 0:00 0 S 20942742SwollmanRule Mexico 1950 only - Feb 12 0:00 1:00 D 20952742SwollmanRule Mexico 1950 only - Jul 30 0:00 0 S 209675267SwollmanRule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 209775267SwollmanRule Mexico 1996 2000 - Oct lastSun 2:00 0 S 209893799SwollmanRule Mexico 2001 only - May Sun>=1 2:00 1:00 D 209993799SwollmanRule Mexico 2001 only - Sep lastSun 2:00 0 S 210093799SwollmanRule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 210193799SwollmanRule Mexico 2002 max - Oct lastSun 2:00 0 S 21022742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 210343014Swollman# Quintana Roo 210458787SruZone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 210575267Swollman -6:00 - CST 1981 Dec 23 210643543Swollman -5:00 Mexico E%sT 1998 Aug 2 2:00 210743543Swollman -6:00 Mexico C%sT 210864499Swollman# Campeche, Yucatan 210964499SwollmanZone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 211075267Swollman -6:00 - CST 1981 Dec 23 211164499Swollman -5:00 - EST 1982 Dec 2 211264499Swollman -6:00 Mexico C%sT 2113203019Sedwin# Coahuila, Durango, Nuevo Leon, Tamaulipas (near US border) 2114203019SedwinZone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2115203019Sedwin -6:00 - CST 1988 2116203019Sedwin -6:00 US C%sT 1989 2117203019Sedwin -6:00 Mexico C%sT 2010 2118203019Sedwin -6:00 US C%sT 2119203019Sedwin# Coahuila, Durango, Nuevo Leon, Tamaulipas (away from US border) 212075267SwollmanZone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 212164499Swollman -6:00 - CST 1988 212264499Swollman -6:00 US C%sT 1989 212364499Swollman -6:00 Mexico C%sT 212443014Swollman# Central Mexico 2125203019SedwinZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 21262742Swollman -7:00 - MST 1927 Jun 10 23:00 21272742Swollman -6:00 - CST 1930 Nov 15 21282742Swollman -7:00 - MST 1931 May 1 23:00 21292742Swollman -6:00 - CST 1931 Oct 213075267Swollman -7:00 - MST 1932 Apr 1 213186222Swollman -6:00 Mexico C%sT 2001 Sep 30 02:00 213293799Swollman -6:00 - CST 2002 Feb 20 213393799Swollman -6:00 Mexico C%sT 2134203019Sedwin# Chihuahua (near US border) 2135203019SedwinZone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2136203019Sedwin -7:00 - MST 1927 Jun 10 23:00 2137203019Sedwin -6:00 - CST 1930 Nov 15 2138203019Sedwin -7:00 - MST 1931 May 1 23:00 2139203019Sedwin -6:00 - CST 1931 Oct 2140203019Sedwin -7:00 - MST 1932 Apr 1 2141203019Sedwin -6:00 - CST 1996 2142203019Sedwin -6:00 Mexico C%sT 1998 2143203019Sedwin -6:00 - CST 1998 Apr Sun>=1 3:00 2144203019Sedwin -7:00 Mexico M%sT 2010 2145203019Sedwin -7:00 US M%sT 2146203019Sedwin# Chihuahua (away from US border) 214758787SruZone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 214843014Swollman -7:00 - MST 1927 Jun 10 23:00 214943014Swollman -6:00 - CST 1930 Nov 15 215043014Swollman -7:00 - MST 1931 May 1 23:00 215143014Swollman -6:00 - CST 1931 Oct 215275267Swollman -7:00 - MST 1932 Apr 1 215343014Swollman -6:00 - CST 1996 215443014Swollman -6:00 Mexico C%sT 1998 215543014Swollman -6:00 - CST 1998 Apr Sun>=1 3:00 215643014Swollman -7:00 Mexico M%sT 215758787Sru# Sonora 215858787SruZone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 215958787Sru -7:00 - MST 1927 Jun 10 23:00 216058787Sru -6:00 - CST 1930 Nov 15 216158787Sru -7:00 - MST 1931 May 1 23:00 216258787Sru -6:00 - CST 1931 Oct 216375267Swollman -7:00 - MST 1932 Apr 1 216464499Swollman -6:00 - CST 1942 Apr 24 216558787Sru -7:00 - MST 1949 Jan 14 216658787Sru -8:00 - PST 1970 216758787Sru -7:00 Mexico M%sT 1999 216858787Sru -7:00 - MST 2169207898Sedwin 2170207898Sedwin# From Alexander Krivenyshev (2010-04-21): 2171207898Sedwin# According to news, Bahía de Banderas (Mexican state of Nayarit) 2172207898Sedwin# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2173207898Sedwin# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2174207898Sedwin# 2175207898Sedwin# (Spanish) 2176207898Sedwin# Bahía de Banderas homologa su horario al del centro del 2177207898Sedwin# país, a partir de este domingo 2178207898Sedwin# <a href="http://www.nayarit.gob.mx/notes.asp?id=20748"> 2179207898Sedwin# http://www.nayarit.gob.mx/notes.asp?id=20748 2180207898Sedwin# </a> 2181207898Sedwin# 2182207898Sedwin# Bahía de Banderas homologa su horario con el del Centro del 2183207898Sedwin# País 2184207898Sedwin# <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"> 2185207898Sedwin# 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" 2186207898Sedwin# </a> 2187207898Sedwin# 2188207898Sedwin# (English) 2189207898Sedwin# Puerto Vallarta and Bahía de Banderas: One Time Zone 2190207898Sedwin# <a href="http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml"> 2191207898Sedwin# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2192207898Sedwin# </a> 2193207898Sedwin# 2194207898Sedwin# or 2195207898Sedwin# <a href="http://www.worldtimezone.com/dst_news/dst_news_mexico08.html"> 2196207898Sedwin# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2197207898Sedwin# </a> 2198207898Sedwin# 2199207898Sedwin# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2200207898Sedwin# will allow Bahía de Banderas and Puerto Vallarta to share the same time 2201207898Sedwin# zone ..." 220264499Swollman# Baja California Sur, Nayarit, Sinaloa 2203207898Sedwin 2204207898Sedwin# From Arthur David Olson (2010-05-01): 2205207898Sedwin# Use "Bahia_Banderas" to keep the name to fourteen characters. 2206207898Sedwin 22072742SwollmanZone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 22082742Swollman -7:00 - MST 1927 Jun 10 23:00 22092742Swollman -6:00 - CST 1930 Nov 15 22102742Swollman -7:00 - MST 1931 May 1 23:00 22112742Swollman -6:00 - CST 1931 Oct 221275267Swollman -7:00 - MST 1932 Apr 1 221364499Swollman -6:00 - CST 1942 Apr 24 22142742Swollman -7:00 - MST 1949 Jan 14 22152742Swollman -8:00 - PST 1970 221614343Swollman -7:00 Mexico M%sT 2217207898Sedwin 2218207898SedwinZone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2219207898Sedwin -7:00 - MST 1927 Jun 10 23:00 2220207898Sedwin -6:00 - CST 1930 Nov 15 2221207898Sedwin -7:00 - MST 1931 May 1 23:00 2222207898Sedwin -6:00 - CST 1931 Oct 2223207898Sedwin -7:00 - MST 1932 Apr 1 2224207898Sedwin -6:00 - CST 1942 Apr 24 2225207898Sedwin -7:00 - MST 1949 Jan 14 2226207898Sedwin -8:00 - PST 1970 2227210718Sedwin -7:00 Mexico M%sT 2010 Apr 4 2:00 2228207898Sedwin -6:00 Mexico C%sT 2229207898Sedwin 2230203019Sedwin# Baja California (near US border) 22312742SwollmanZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 223275267Swollman -7:00 - MST 1924 22332742Swollman -8:00 - PST 1927 Jun 10 23:00 223475267Swollman -7:00 - MST 1930 Nov 15 223575267Swollman -8:00 - PST 1931 Apr 1 223675267Swollman -8:00 1:00 PDT 1931 Sep 30 223764499Swollman -8:00 - PST 1942 Apr 24 2238158421Swollman -8:00 1:00 PWT 1945 Aug 14 23:00u 2239158421Swollman -8:00 1:00 PPT 1945 Nov 12 # Peace 224075267Swollman -8:00 - PST 1948 Apr 5 224175267Swollman -8:00 1:00 PDT 1949 Jan 14 224275267Swollman -8:00 - PST 1954 224375267Swollman -8:00 CA P%sT 1961 224475267Swollman -8:00 - PST 1976 224514343Swollman -8:00 US P%sT 1996 224675267Swollman -8:00 Mexico P%sT 2001 224793799Swollman -8:00 US P%sT 2002 Feb 20 2248203019Sedwin -8:00 Mexico P%sT 2010 2249203019Sedwin -8:00 US P%sT 2250203019Sedwin# Baja California (away from US border) 2251203019SedwinZone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2252203019Sedwin -7:00 - MST 1924 2253203019Sedwin -8:00 - PST 1927 Jun 10 23:00 2254203019Sedwin -7:00 - MST 1930 Nov 15 2255203019Sedwin -8:00 - PST 1931 Apr 1 2256203019Sedwin -8:00 1:00 PDT 1931 Sep 30 2257203019Sedwin -8:00 - PST 1942 Apr 24 2258203019Sedwin -8:00 1:00 PWT 1945 Aug 14 23:00u 2259203019Sedwin -8:00 1:00 PPT 1945 Nov 12 # Peace 2260203019Sedwin -8:00 - PST 1948 Apr 5 2261203019Sedwin -8:00 1:00 PDT 1949 Jan 14 2262203019Sedwin -8:00 - PST 1954 2263203019Sedwin -8:00 CA P%sT 1961 2264203019Sedwin -8:00 - PST 1976 2265203019Sedwin -8:00 US P%sT 1996 2266203019Sedwin -8:00 Mexico P%sT 2001 2267203019Sedwin -8:00 US P%sT 2002 Feb 20 226893799Swollman -8:00 Mexico P%sT 2269158421Swollman# From Paul Eggert (2006-03-22): 227075267Swollman# Formerly there was an America/Ensenada zone, which differed from 227175267Swollman# America/Tijuana only in that it did not observe DST from 1976 2272158421Swollman# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2273158421Swollman# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 227475267Swollman# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and 2275158421Swollman# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 227675267Swollman# DST-observance was a town-by-town matter back then. This concerns 227775267Swollman# data after 1970 so most likely there should be at least one Zone 227875267Swollman# other than America/Tijuana for Baja, but it's not clear yet what its 227975267Swollman# name or contents should be. 22802742Swollman# 22812742Swollman# Revillagigedo Is 22822742Swollman# no information 22832742Swollman 22842742Swollman############################################################################### 22852742Swollman 22862742Swollman# Anguilla 22872742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 22882742SwollmanZone America/Anguilla -4:12:16 - LMT 1912 Mar 2 22892742Swollman -4:00 - AST 22902742Swollman 22912742Swollman# Antigua and Barbuda 22922742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 22932742SwollmanZone America/Antigua -4:07:12 - LMT 1912 Mar 2 22942742Swollman -5:00 - EST 1951 22952742Swollman -4:00 - AST 22962742Swollman 22972742Swollman# Bahamas 2298169811Swollman# 2299169811Swollman# From Sue Williams (2006-12-07): 2300169811Swollman# The Bahamas announced about a month ago that they plan to change their DST 2301169811Swollman# rules to sync with the U.S. starting in 2007.... 2302169811Swollman# http://www.jonesbahamas.com/?c=45&a=10412 2303169811Swollman 23042742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2305181421SedwinRule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2306181421SedwinRule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 23072742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23082742SwollmanZone America/Nassau -5:09:24 - LMT 1912 Mar 2 2309169811Swollman -5:00 Bahamas E%sT 1976 2310169811Swollman -5:00 US E%sT 23112742Swollman 23122742Swollman# Barbados 23132742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 23142742SwollmanRule Barb 1977 only - Jun 12 2:00 1:00 D 23152742SwollmanRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 23162742SwollmanRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 23172742SwollmanRule Barb 1979 only - Sep 30 2:00 0 S 23182742SwollmanRule Barb 1980 only - Sep 25 2:00 0 S 23192742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23202742SwollmanZone America/Barbados -3:58:28 - LMT 1924 # Bridgetown 232143014Swollman -3:58:28 - BMT 1932 # Bridgetown Mean Time 23222742Swollman -4:00 Barb A%sT 23232742Swollman 23242742Swollman# Belize 2325158421Swollman# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 23262742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 23272742SwollmanRule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 23282742SwollmanRule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 23292742SwollmanRule Belize 1973 only - Dec 5 0:00 1:00 D 23302742SwollmanRule Belize 1974 only - Feb 9 0:00 0 S 23312742SwollmanRule Belize 1982 only - Dec 18 0:00 1:00 D 23322742SwollmanRule Belize 1983 only - Feb 12 0:00 0 S 23332742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23342742SwollmanZone America/Belize -5:52:48 - LMT 1912 Apr 23352742Swollman -6:00 Belize C%sT 23362742Swollman 23372742Swollman# Bermuda 2338163302Sru 2339163302Sru# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2340163302Sru 2341163302Sru# Next year, however, clocks in the US will go forward on the second Sunday 2342163302Sru# in March, until the first Sunday in November. And, after the Time Zone 2343163302Sru# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2344163302Sru# Friday, the same thing will happen in Bermuda. 2345163302Sru# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2346163302Sru 23472742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23482742SwollmanZone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton 23492742Swollman -4:00 - AST 1974 Apr 28 2:00 2350163302Sru -4:00 Bahamas A%sT 1976 2351163302Sru -4:00 US A%sT 23522742Swollman 23532742Swollman# Cayman Is 23542742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23552742SwollmanZone America/Cayman -5:25:32 - LMT 1890 # Georgetown 235643014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 23572742Swollman -5:00 - EST 23582742Swollman 23592742Swollman# Costa Rica 23602742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 23612742SwollmanRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 23622742SwollmanRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 236320094SwollmanRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2364158421Swollman# IATA SSIM (1991-09) says the following was at 1:00; 2365158421Swollman# go with Shanks & Pottenger. 236620094SwollmanRule CR 1991 only - Jul 1 0:00 0 S 236720094SwollmanRule CR 1992 only - Mar 15 0:00 0 S 23682742Swollman# There are too many San Joses elsewhere, so we'll use `Costa Rica'. 23692742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23702742SwollmanZone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose 237158787Sru -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time 23722742Swollman -6:00 CR C%sT 23732742Swollman# Coco 23742742Swollman# no information; probably like America/Costa_Rica 23752742Swollman 23762742Swollman# Cuba 23772742Swollman 237858787Sru# From Arthur David Olson (1999-03-29): 237958787Sru# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 238058787Sru# the Cuban National Team and the Baltimore Orioles was carried live on 238158787Sru# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 238258787Sru# During the game, play-by-play announcer Jim Hunter noted that 238358787Sru# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 238458787Sru# Time today." (The "two hour" remark referred to losing one hour of 238558787Sru# sleep on 1999-03-28--when the announcers were in Cuba as it switched 238658787Sru# to DST--and one more hour on 1999-04-04--when the announcers will have 238758787Sru# returned to Baltimore, which switches on that date.) 23882742Swollman 2389138323Swollman# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2390138323Swollman# Cuba is not going back to standard time this year. 2391158421Swollman# From Paul Eggert (2006-03-22): 2392138323Swollman# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2393138323Swollman# says that it's due to a problem at the Antonio Guiteras 2394138323Swollman# thermoelectric plant, and says "This October there will be no return 2395138323Swollman# to normal hours (after daylight saving time)". 2396158421Swollman# For now, let's assume that it's a temporary measure. 2397138323Swollman 2398153670Swollman# From Carlos A. Carnero Delgado (2005-11-12): 2399153670Swollman# This year (just like in 2004-2005) there's no change in time zone 2400153670Swollman# adjustment in Cuba. We will stay in daylight saving time: 2401153670Swollman# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2402153670Swollman 2403169811Swollman# From Jesper Norgaard Welen (2006-10-21): 2404169811Swollman# An article in GRANMA INTERNACIONAL claims that Cuba will end 2405169811Swollman# the 3 years of permanent DST next weekend, see 2406169811Swollman# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2407169811Swollman# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2408169811Swollman# watches should be set back one hour -- going back to 00:00 hours -- returning 2409169811Swollman# to the normal schedule.... 2410163302Sru 2411169811Swollman# From Paul Eggert (2007-03-02): 2412169811Swollman# http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday, 2413169811Swollman# says Cuban clocks will advance at midnight on March 10. 2414169811Swollman# For lack of better information, assume Cuba will use US rules, 2415169811Swollman# except that it switches at midnight standard time as usual. 2416173319Sedwin# 2417173319Sedwin# From Steffen Thorsen (2007-10-25): 2418173319Sedwin# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2419173319Sedwin# earlier - on the last Sunday of October, just like in 2006. 2420173319Sedwin# 2421173319Sedwin# He supplied these references: 2422173319Sedwin# 2423173319Sedwin# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2424173319Sedwin# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2425173319Sedwin# 2426173319Sedwin# From Alex Kryvenishev (2007-10-25): 2427173319Sedwin# Here is also article from Granma (Cuba): 2428173319Sedwin# 2429173319Sedwin# [Regira] el Horario Normal desde el [proximo] domingo 28 de octubre 2430173319Sedwin# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2431173319Sedwin# 2432173319Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2433169811Swollman 2434177591Sedwin# From Arthur David Olson (2008-03-09): 2435177591Sedwin# I'm in Maryland which is now observing United States Eastern Daylight 2436177591Sedwin# Time. At 9:44 local time I used RealPlayer to listen to 2437177591Sedwin# <a href="http://media.enet.cu/radioreloj"> 2438177591Sedwin# http://media.enet.cu/radioreloj 2439177591Sedwin# </a>, a Cuban information station, and heard 2440177591Sedwin# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2441177591Sedwin# indicating that Cuba is still on standard time. 2442177591Sedwin 2443177591Sedwin# From Steffen Thorsen (2008-03-12): 2444177591Sedwin# It seems that Cuba will start DST on Sunday, 2007-03-16... 2445177591Sedwin# It was announced yesterday, according to this source (in Spanish): 2446177591Sedwin# <a href="http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm"> 2447177591Sedwin# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2448177591Sedwin# </a> 2449177591Sedwin# 2450177591Sedwin# Some more background information is posted here: 2451177591Sedwin# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html"> 2452177591Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2453177591Sedwin# </a> 2454177591Sedwin# 2455177591Sedwin# The article also says that Cuba has been observing DST since 1963, 2456177591Sedwin# while Shanks (and tzdata) has 1965 as the first date (except in the 2457177591Sedwin# 1940's). Many other web pages in Cuba also claim that it has been 2458177591Sedwin# observed since 1963, but with the exception of 1970 - an exception 2459177591Sedwin# which is not present in tzdata/Shanks. So there is a chance we need to 2460177591Sedwin# change some historic records as well. 2461177591Sedwin# 2462177591Sedwin# One example: 2463177591Sedwin# <a href="http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm"> 2464177591Sedwin# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2465177591Sedwin# </a> 2466177591Sedwin 2467177591Sedwin# From Jesper Norgaard Welen (2008-03-13): 2468177591Sedwin# The Cuban time change has just been confirmed on the most authoritative 2469177591Sedwin# web site, the Granma. Please check out 2470177591Sedwin# <a href="http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html"> 2471177591Sedwin# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2472177591Sedwin# </a> 2473177591Sedwin# 2474177591Sedwin# Basically as expected after Steffen Thorsens information, the change 2475177591Sedwin# will take place midnight between Saturday and Sunday. 2476177591Sedwin 2477177591Sedwin# From Arthur David Olson (2008-03-12): 2478177591Sedwin# Assume Sun>=15 (third Sunday) going forward. 2479177591Sedwin 2480189923Sedwin# From Alexander Krivenyshev (2009-03-04) 2481189923Sedwin# According to the Radio Reloj - Cuba will start Daylight Saving Time on 2482189923Sedwin# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2483189923Sedwin# not on midnight March 14 / March 15 as previously thought. 2484189923Sedwin# 2485189923Sedwin# <a href="http://www.worldtimezone.com/dst_news/dst_news_cuba05.html"> 2486189923Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2487189923Sedwin# (in Spanish) 2488189923Sedwin# </a> 2489189923Sedwin 2490189923Sedwin# From Arthur David Olson (2009-03-09) 2491189923Sedwin# I listened over the Internet to 2492189923Sedwin# <a href="http://media.enet.cu/readioreloj"> 2493189923Sedwin# http://media.enet.cu/readioreloj 2494189923Sedwin# </a> 2495189923Sedwin# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2496189923Sedwin# the time was announced as "diez cinco"--the same time as here, indicating 2497189923Sedwin# that has indeed switched to DST. Assume second Sunday from 2009 forward. 2498189923Sedwin 24992742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 25002742SwollmanRule Cuba 1928 only - Jun 10 0:00 1:00 D 25012742SwollmanRule Cuba 1928 only - Oct 10 0:00 0 S 25022742SwollmanRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 25032742SwollmanRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 25042742SwollmanRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 25052742SwollmanRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 25062742SwollmanRule Cuba 1965 only - Jun 1 0:00 1:00 D 25072742SwollmanRule Cuba 1965 only - Sep 30 0:00 0 S 25082742SwollmanRule Cuba 1966 only - May 29 0:00 1:00 D 25092742SwollmanRule Cuba 1966 only - Oct 2 0:00 0 S 25102742SwollmanRule Cuba 1967 only - Apr 8 0:00 1:00 D 25112742SwollmanRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 25122742SwollmanRule Cuba 1968 only - Apr 14 0:00 1:00 D 25132742SwollmanRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 25142742SwollmanRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 25152742SwollmanRule Cuba 1972 1974 - Oct 8 0:00 0 S 25162742SwollmanRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 25172742SwollmanRule Cuba 1978 only - May 7 0:00 1:00 D 251830711SwollmanRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 25192742SwollmanRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 25202742SwollmanRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 25212742SwollmanRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 252243014SwollmanRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 252320094SwollmanRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 252443014SwollmanRule Cuba 1996 only - Oct 6 0:00s 0 S 252543014SwollmanRule Cuba 1997 only - Oct 12 0:00s 0 S 252658787SruRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2527138323SwollmanRule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2528187588SedwinRule Cuba 2000 2004 - Apr Sun>=1 0:00s 1:00 D 2529173319SedwinRule Cuba 2006 max - Oct lastSun 0:00s 0 S 2530177591SedwinRule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2531189923SedwinRule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2532189923SedwinRule Cuba 2009 max - Mar Sun>=8 0:00s 1:00 D 25332742Swollman 25342742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25352742SwollmanZone America/Havana -5:29:28 - LMT 1890 253658787Sru -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 25372742Swollman -5:00 Cuba C%sT 25382742Swollman 25392742Swollman# Dominica 25402742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25412742SwollmanZone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau 25422742Swollman -4:00 - AST 25432742Swollman 25442742Swollman# Dominican Republic 254575267Swollman 254675267Swollman# From Steffen Thorsen (2000-10-30): 254775267Swollman# Enrique Morales reported to me that the Dominican Republic has changed the 254875267Swollman# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 254975267Swollman# http://www.listin.com.do/antes/261000/republica/princi.html 255075267Swollman 255175267Swollman# From Paul Eggert (2000-12-04): 255275267Swollman# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 255375267Swollman 255475267Swollman# From Rives McDow (2000-12-01): 255575267Swollman# Dominican Republic changed its mind and presidential decree on Tuesday, 255675267Swollman# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 255775267Swollman# Dominican Republic will be reverting to 8 hours from the International Date 255875267Swollman# Line, and will not be using DST in the foreseeable future. The reason they 255975267Swollman# decided to use DST was to be in synch with Puerto Rico, who was also going 256075267Swollman# to implement DST. When Puerto Rico didn't implement DST, the president 256175267Swollman# decided to revert. 256275267Swollman 256375267Swollman 25642742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 25652742SwollmanRule DR 1966 only - Oct 30 0:00 1:00 D 25662742SwollmanRule DR 1967 only - Feb 28 0:00 0 S 25672742SwollmanRule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 25682742SwollmanRule DR 1970 only - Feb 21 0:00 0 S 25692742SwollmanRule DR 1971 only - Jan 20 0:00 0 S 25702742SwollmanRule DR 1972 1974 - Jan 21 0:00 0 S 25712742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25722742SwollmanZone America/Santo_Domingo -4:39:36 - LMT 1890 25732742Swollman -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 25742742Swollman -5:00 DR E%sT 1974 Oct 27 257575267Swollman -4:00 - AST 2000 Oct 29 02:00 257675267Swollman -5:00 US E%sT 2000 Dec 3 01:00 25772742Swollman -4:00 - AST 25782742Swollman 25792742Swollman# El Salvador 2580158421Swollman 25812742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 25822742SwollmanRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 25832742SwollmanRule Salv 1987 1988 - Sep lastSun 0:00 0 S 2584121098Swollman# There are too many San Salvadors elsewhere, so use America/El_Salvador 2585121098Swollman# instead of America/San_Salvador. 25862742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25872742SwollmanZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 25882742Swollman -6:00 Salv C%sT 25892742Swollman 25902742Swollman# Grenada 25912742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 259219878SwollmanZone America/Grenada -4:07:00 - LMT 1911 Jul # St George's 25932742Swollman -4:00 - AST 25942742Swollman 25952742Swollman# Guadeloupe 25962742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25972742SwollmanZone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre 25982742Swollman -4:00 - AST 2599174242Sedwin# St Barthelemy 2600174242SedwinLink America/Guadeloupe America/St_Barthelemy 2601174242Sedwin# St Martin (French part) 2602174242SedwinLink America/Guadeloupe America/Marigot 26032742Swollman 26042742Swollman# Guatemala 2605158421Swollman# 2606158421Swollman# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2607158421Swollman# Diario Co Latino, at 2608158421Swollman# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079, 2609158421Swollman# says in an article dated 2006-04-19 that the Guatemalan government had 2610158421Swollman# decided on that date to advance official time by 60 minutes, to lessen the 2611158421Swollman# impact of the elevated cost of oil.... Daylight saving time will last from 2612158421Swollman# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2613163302Sru# From Paul Eggert (2006-06-22): 2614163302Sru# The Ministry of Energy and Mines, press release CP-15/2006 2615163302Sru# (2006-04-19), says DST ends at 24:00. See 2616163302Sru# <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>. 2617163302Sru 26182742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 26192742SwollmanRule Guat 1973 only - Nov 25 0:00 1:00 D 26202742SwollmanRule Guat 1974 only - Feb 24 0:00 0 S 26212742SwollmanRule Guat 1983 only - May 21 0:00 1:00 D 26222742SwollmanRule Guat 1983 only - Sep 22 0:00 0 S 262320094SwollmanRule Guat 1991 only - Mar 23 0:00 1:00 D 262420094SwollmanRule Guat 1991 only - Sep 7 0:00 0 S 2625158421SwollmanRule Guat 2006 only - Apr 30 0:00 1:00 D 2626158421SwollmanRule Guat 2006 only - Oct 1 0:00 0 S 26272742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 26282742SwollmanZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 26292742Swollman -6:00 Guat C%sT 26302742Swollman 26312742Swollman# Haiti 2632149514Swollman# From Gwillim Law (2005-04-15): 2633149514Swollman# Risto O. Nykanen wrote me that Haiti is now on DST. 2634149514Swollman# I searched for confirmation, and I found a 2635149514Swollman# <a href="http://www.haitianconsulate.org/time.doc"> press release 2636149514Swollman# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 2637149514Swollman# </a>. Translated from French, it says: 2638149514Swollman# 2639149514Swollman# "The Prime Minister's Communication Office notifies the public in general 2640149514Swollman# and the press in particular that, following a decision of the Interior 2641149514Swollman# Ministry and the Territorial Collectivities [I suppose that means the 2642149514Swollman# provinces], Haiti will move to Eastern Daylight Time in the night from next 2643149514Swollman# Saturday the 2nd to Sunday the 3rd. 2644149514Swollman# 2645149514Swollman# "Consequently, the Prime Minister's Communication Office wishes to inform 2646149514Swollman# the population that the country's clocks will be set forward one hour 2647149514Swollman# starting at midnight. This provision will hold until the last Saturday in 2648149514Swollman# October 2005. 2649149514Swollman# 2650149514Swollman# "Port-au-Prince, March 31, 2005" 2651158421Swollman# 2652158421Swollman# From Steffen Thorsen (2006-04-04): 2653158421Swollman# I have been informed by users that Haiti observes DST this year like 2654158421Swollman# last year, so the current "only" rule for 2005 might be changed to a 2655158421Swollman# "max" rule or to last until 2006. (Who knows if they will observe DST 2656158421Swollman# next year or if they will extend their DST like US/Canada next year). 2657158421Swollman# 2658158421Swollman# I have found this article about it (in French): 2659158421Swollman# http://www.haitipressnetwork.com/news.cfm?articleID=7612 2660158421Swollman# 2661158421Swollman# The reason seems to be an energy crisis. 2662149514Swollman 2663169811Swollman# From Stephen Colebourne (2007-02-22): 2664169811Swollman# Some IATA info: Haiti won't be having DST in 2007. 2665158421Swollman 2666169811Swollman 26672742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 26682742SwollmanRule Haiti 1983 only - May 8 0:00 1:00 D 26692742SwollmanRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 26702742SwollmanRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 2671158421Swollman# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 2672158421Swollman# Go with IATA. 267343014SwollmanRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 267443014SwollmanRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 2675169811SwollmanRule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 2676169811SwollmanRule Haiti 2005 2006 - Oct lastSun 0:00 0 S 26772742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 26782742SwollmanZone America/Port-au-Prince -4:49:20 - LMT 1890 26792742Swollman -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 26802742Swollman -5:00 Haiti E%sT 26812742Swollman 26822742Swollman# Honduras 2683158421Swollman# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 2684158421Swollman 2685158421Swollman# From Paul Eggert (2006-05-05): 2686158421Swollman# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 2687158421Swollman# saying Honduras will start using DST midnight Saturday, effective 4 2688158421Swollman# months until September. La Tribuna reported today 2689158421Swollman# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 2690163302Sru# of Honduras, refused to back down on this. 2691158421Swollman 2692163302Sru# From Jesper Norgaard Welen (2006-08-08): 2693163302Sru# It seems that Honduras has returned from DST to standard time this Monday at 2694163302Sru# 00:00 hours (prolonging Sunday to 25 hours duration). 2695163302Sru# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 2696163302Sru 2697163302Sru# From Paul Eggert (2006-08-08): 2698163302Sru# Also see Diario El Heraldo, The country returns to standard time (2006-08-08) 2699163302Sru# <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>. 2700163302Sru# It mentions executive decree 18-2006. 2701163302Sru 2702163302Sru# From Steffen Thorsen (2006-08-17): 2703163302Sru# Honduras will observe DST from 2007 to 2009, exact dates are not 2704163302Sru# published, I have located this authoritative source: 2705163302Sru# http://www.presidencia.gob.hn/noticia.aspx?nId=47 2706163302Sru 2707169811Swollman# From Steffen Thorsen (2007-03-30): 2708169811Swollman# http://www.laprensahn.com/pais_nota.php?id04962=7386 2709169811Swollman# So it seems that Honduras will not enter DST this year.... 2710169811Swollman 2711158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2712158421SwollmanRule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 2713158421SwollmanRule Hond 1987 1988 - Sep lastSun 0:00 0 S 2714169811SwollmanRule Hond 2006 only - May Sun>=1 0:00 1:00 D 2715169811SwollmanRule Hond 2006 only - Aug Mon>=1 0:00 0 S 27162742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 27172742SwollmanZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 2718158421Swollman -6:00 Hond C%sT 271943543Swollman# 272043543Swollman# Great Swan I ceded by US to Honduras in 1972 27212742Swollman 27222742Swollman# Jamaica 27232742Swollman 272419878Swollman# From Bob Devine (1988-01-28): 27252742Swollman# Follows US rules. 27262742Swollman 272719878Swollman# From U. S. Naval Observatory (1989-01-19): 27282742Swollman# JAMAICA 5 H BEHIND UTC 27292742Swollman 2730158421Swollman# From Shanks & Pottenger: 27312742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 27322742SwollmanZone America/Jamaica -5:07:12 - LMT 1890 # Kingston 273343014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 273458787Sru -5:00 - EST 1974 Apr 28 2:00 273520094Swollman -5:00 US E%sT 1984 273620094Swollman -5:00 - EST 27372742Swollman 27382742Swollman# Martinique 27392742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 27402742SwollmanZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 274186222Swollman -4:04:20 - FFMT 1911 May # Fort-de-France MT 27422742Swollman -4:00 - AST 1980 Apr 6 27432742Swollman -4:00 1:00 ADT 1980 Sep 28 27442742Swollman -4:00 - AST 27452742Swollman 27462742Swollman# Montserrat 2747158421Swollman# From Paul Eggert (2006-03-22): 2748158421Swollman# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital. 2749158421Swollman# world.gazetteer.com says Cork Hill is the most populous location now. 27502742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2751158421SwollmanZone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill 27522742Swollman -4:00 - AST 27532742Swollman 27542742Swollman# Nicaragua 275543543Swollman# 2756158421Swollman# This uses Shanks & Pottenger for times before 2005. 275743543Swollman# 2758149514Swollman# From Steffen Thorsen (2005-04-12): 2759149514Swollman# I've got reports from 8 different people that Nicaragua just started 2760149514Swollman# DST on Sunday 2005-04-10, in order to save energy because of 2761149514Swollman# expensive petroleum. The exact end date for DST is not yet 2762149514Swollman# announced, only "September" but some sites also say "mid-September". 2763149514Swollman# Some background information is available on the President's official site: 2764149514Swollman# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 2765149514Swollman# The Decree, no 23-2005 is available here: 2766149514Swollman# 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 2767149514Swollman# 2768149514Swollman# From Paul Eggert (2005-05-01): 2769149514Swollman# The decree doesn't say anything about daylight saving, but for now let's 2770158421Swollman# assume that it is daylight saving.... 2771149514Swollman# 2772149514Swollman# From Gwillim Law (2005-04-21): 2773149514Swollman# The Associated Press story on the time change, which can be found at 2774149514Swollman# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 2775149514Swollman# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 2776149514Swollman# time that a change of clocks was applied to save energy was in the year 2000 2777149514Swollman# during the Arnoldo Aleman administration."... 2778149514Swollman# The northamerica file says that Nicaragua has been on UTC-6 continuously 2779149514Swollman# since December 1998. I wasn't able to find any details of Nicaraguan time 2780149514Swollman# changes in 2000. Perhaps a note could be added to the northamerica file, to 2781149514Swollman# the effect that we have indirect evidence that DST was observed in 2000. 2782149514Swollman# 2783153670Swollman# From Jesper Norgaard Welen (2005-11-02): 2784153670Swollman# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 2785153670Swollman# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 2786153670Swollman# (2005-09-26) 2787153670Swollman# 2788158421Swollman# From Jesper Norgaard Welen (2006-05-05): 2789158421Swollman# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 2790158421Swollman# (my informal translation) 2791158421Swollman# By order of the president of the republic, Enrique Bolanos, Nicaragua 2792158421Swollman# advanced by sixty minutes their official time, yesterday at 2 in the 2793158421Swollman# morning, and will stay that way until 30.th. of september. 2794158421Swollman# 2795163302Sru# From Jesper Norgaard Welen (2006-09-30): 2796163302Sru# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 2797163302Sru# My informal translation runs: 2798163302Sru# The natural sun time is restored in all the national territory, in that the 2799163302Sru# time is returned one hour at 01:00 am of October 1 of 2006. 2800163302Sru# 28012742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 28022742SwollmanRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 28032742SwollmanRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 2804149514SwollmanRule Nic 2005 only - Apr 10 0:00 1:00 D 2805163302SruRule Nic 2005 only - Oct Sun>=1 0:00 0 S 2806158421SwollmanRule Nic 2006 only - Apr 30 2:00 1:00 D 2807163302SruRule Nic 2006 only - Oct Sun>=1 1:00 0 S 28082742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28092742SwollmanZone America/Managua -5:45:08 - LMT 1890 281086222Swollman -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 28112742Swollman -6:00 - CST 1973 May 28122742Swollman -5:00 - EST 1975 Feb 16 2813158421Swollman -6:00 Nic C%sT 1992 Jan 1 4:00 2814158421Swollman -5:00 - EST 1992 Sep 24 2815158421Swollman -6:00 - CST 1993 2816158421Swollman -5:00 - EST 1997 2817149514Swollman -6:00 Nic C%sT 28182742Swollman 28192742Swollman# Panama 28202742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28212742SwollmanZone America/Panama -5:18:08 - LMT 1890 282286222Swollman -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time 28232742Swollman -5:00 - EST 28242742Swollman 28252742Swollman# Puerto Rico 28262742Swollman# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. 28272742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 282814343SwollmanZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 28292742Swollman -4:00 - AST 1942 May 3 2830158421Swollman -4:00 US A%sT 1946 28312742Swollman -4:00 - AST 28322742Swollman 28332742Swollman# St Kitts-Nevis 28342742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28352742SwollmanZone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre 28362742Swollman -4:00 - AST 28372742Swollman 28382742Swollman# St Lucia 28392742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28402742SwollmanZone America/St_Lucia -4:04:00 - LMT 1890 # Castries 284186222Swollman -4:04:00 - CMT 1912 # Castries Mean Time 28422742Swollman -4:00 - AST 28432742Swollman 28442742Swollman# St Pierre and Miquelon 28452742Swollman# There are too many St Pierres elsewhere, so we'll use `Miquelon'. 28462742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28472742SwollmanZone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 28482742Swollman -4:00 - AST 1980 May 2849121098Swollman -3:00 - PMST 1987 # Pierre & Miquelon Time 2850121098Swollman -3:00 Canada PM%sT 28512742Swollman 28522742Swollman# St Vincent and the Grenadines 28532742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28542742SwollmanZone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown 285543014Swollman -4:04:56 - KMT 1912 # Kingstown Mean Time 28562742Swollman -4:00 - AST 28572742Swollman 28582742Swollman# Turks and Caicos 2859169811Swollman# 2860169811Swollman# From Chris Dunn in 2861169811Swollman# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007> 2862169811Swollman# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 2863169811Swollman# daylight saving dates for time changes have been adjusted to match 2864169811Swollman# the recent U.S. change of dates. 2865169811Swollman# 2866169811Swollman# From Brian Inglis (2007-04-28): 2867169811Swollman# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 2868169811Swollman# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 2869169811Swollman# rows before that there is an out of date entry for Oct: 2870169811Swollman# "Eastern Standard Times Begins 2007 2871169811Swollman# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 2872169811Swollman# indicating that the normal ET rules are followed. 2873169811Swollman# 2874169811Swollman# From Paul Eggert (2006-05-01): 2875158421Swollman# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) 2876169811Swollman# says they switch at midnight. Go with Shanks & Pottenger. 2877169811Swollman# 287820094Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2879169811SwollmanRule TC 1979 1986 - Apr lastSun 2:00 1:00 D 2880169811SwollmanRule TC 1979 2006 - Oct lastSun 2:00 0 S 2881169811SwollmanRule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D 2882169811SwollmanRule TC 2007 max - Mar Sun>=8 2:00 1:00 D 2883169811SwollmanRule TC 2007 max - Nov Sun>=1 2:00 0 S 28842742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28852742SwollmanZone America/Grand_Turk -4:44:32 - LMT 1890 288643014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 288720094Swollman -5:00 TC E%sT 28888029Swollman 288914343Swollman# British Virgin Is 28902742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 289114343SwollmanZone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town 28922742Swollman -4:00 - AST 28938029Swollman 289414343Swollman# Virgin Is 289514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 289614343SwollmanZone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie 289714343Swollman -4:00 - AST 2898