northamerica revision 67578
167578Swollman# @(#)northamerica 7.53 22742Swollman# also includes Central America and the Caribbean 32742Swollman 464499Swollman# $FreeBSD: head/share/zoneinfo/northamerica 67578 2000-10-25 19:36:49Z wollman $ 564499Swollman 62742Swollman# This data is by no means authoritative; if you think you know better, 72742Swollman# go ahead and edit the file (and please send any changes to 82742Swollman# tz@elsie.nci.nih.gov for general use in the future). 92742Swollman 1058787Sru# From Paul Eggert <eggert@twinsun.com> (1999-03-22): 112742Swollman# A reliable and entertaining source about time zones is 1258787Sru# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 132742Swollman 142742Swollman############################################################################### 152742Swollman 162742Swollman# United States 172742Swollman 1858787Sru# From Paul Eggert (1999-03-31): 1958787Sru# Howse writes (pp 121-125) that time zones were invented by 2058787Sru# Professor Charles Ferdinand Dowd (1825-1904), 2158787Sru# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 2258787Sru# His pamphlet ``A System of National Time for Railroads'' (1870) 2358787Sru# was the result of his proposals at the Convention of Railroad Trunk Lines 2458787Sru# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 2558787Sru# but in 1872-05 he moved the proposed origin to Greenwich. 2658787Sru# His proposal was adopted by the railroads on 1883-11-18 at 12:00, 2758787Sru# and the most of the country soon followed suit. 2858787Sru 2914343Swollman# From Paul Eggert <eggert@twinsun.com> (1995-12-19): 3014343Swollman# A good source for time zone historical data in the US is 3114343Swollman# Thomas G. Shanks, The American Atlas (5th edition), 3214343Swollman# San Diego: ACS Publications, Inc. (1991). 3314343Swollman# Make sure you have the errata sheet; the book is somewhat useless without it. 3414343Swollman# It is the source for the US and Puerto Rico entries below. 3514343Swollman 3617200Swollman# From Paul Eggert (1996-06-12): 3717200Swollman# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 3817200Swollman# in his whimsical essay ``Turkey vs Eagle, McCauley is my Beagle'' (1784). 3917200Swollman# Not everyone is happy with the results: 4017200Swollman# 4117200Swollman# I don't really care how time is reckoned so long as there is some 4217200Swollman# agreement about it, but I object to being told that I am saving 4317200Swollman# daylight when my reason tells me that I am doing nothing of the kind. 4417200Swollman# I even object to the implication that I am wasting something 4517200Swollman# valuable if I stay in bed after the sun has risen. As an admirer 4617200Swollman# of moonlight I resent the bossy insistence of those who want to 4717200Swollman# reduce my time for enjoying it. At the back of the Daylight Saving 4817200Swollman# scheme I detect the bony, blue-fingered hand of Puritanism, eager 4917200Swollman# to push people into bed earlier, and get them up earlier, to make 5017200Swollman# them healthy, wealthy and wise in spite of themselves. 5117200Swollman# 5217200Swollman# -- Robertson Davies, The Diary of Samuel Marchbanks (1947), XIX, Sunday 5317200Swollman 542742Swollman# From Arthur David Olson: 552742Swollman# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 5619878Swollman# See, for example, the front page of the Saturday, 1974-10-26 5719878Swollman# and Sunday, 1974-10-27 editions of the Washington Post. 582742Swollman 592742Swollman# From Arthur David Olson: 602742Swollman# Before the Uniform Time Act of 1966 took effect in 1967, observance of 612742Swollman# Daylight Saving Time in the US was by local option, except during wartime. 622742Swollman 6367578Swollman# From Arthur David Olson (2000-09-25): 6467578Swollman# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 6567578Swollman# In the introduction, Oboler spoke of "Eastern Peace Time." 6667578Swollman# An AltaVista search turned up 6767578Swollman# <a href="http://rowayton.org/rhs/hstaug45.html">: 6867578Swollman# "When the time is announced over the radio now, it is 'Eastern Peace 6967578Swollman# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 7067578Swollman# </a> (August 1945) by way of confirmation. 7167578Swollman 7267578Swollman# From Joseph Gallant <notquite@hotmail.com>, citing 7367578Swollman# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 7467578Swollman# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 7567578Swollman# to switch to London for Atlee's address, but the American people 7667578Swollman# never got to hear his speech live. According to one press account, 7767578Swollman# CBS' Bob Trout was first to announce the word of Japan's surrender, 7867578Swollman# but a few seconds later, NBC, ABC and Mutual also flashed the word 7967578Swollman# of surrender, all of whom interrupting the bells of Big Ben in 8067578Swollman# London which were to precede Mr. Atlee's speech. 8167578Swollman 8267578Swollman# From Paul Eggert (2000-10-02): 8367578Swollman# Shanks says that DST was called "War Time" in the US in 1919. 8467578Swollman# In the light of the above, this seems suspect; 8567578Swollman# but we have no better authority yet. 8667578Swollman 8767578Swollman 882742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 8914343SwollmanRule US 1918 1919 - Mar lastSun 2:00 1:00 W # War 902742SwollmanRule US 1918 1919 - Oct lastSun 2:00 0 S 912742SwollmanRule US 1942 only - Feb 9 2:00 1:00 W # War 9267578SwollmanRule US 1945 only - Aug 14 23:00u 1:00 P # Peace 932742SwollmanRule US 1945 only - Sep 30 2:00 0 S 942742SwollmanRule US 1967 max - Oct lastSun 2:00 0 S 952742SwollmanRule US 1967 1973 - Apr lastSun 2:00 1:00 D 962742SwollmanRule US 1974 only - Jan 6 2:00 1:00 D 972742SwollmanRule US 1975 only - Feb 23 2:00 1:00 D 982742SwollmanRule US 1976 1986 - Apr lastSun 2:00 1:00 D 992742SwollmanRule US 1987 max - Apr Sun>=1 2:00 1:00 D 10043543Swollman# <a href="http://thomas.loc.gov/cgi-bin/bdquery/z?d106:h.r.00177:"> 10143543Swollman# H.R.177 10243543Swollman# </a> (introduced 1999-01-06) would change April to March in the above rule. 1032742Swollman 10419878Swollman# From Bob Devine (1988-01-28): 1052742Swollman# ...Alaska (and Hawaii) had the timezone names changed in 1967. 1062742Swollman# old new 1072742Swollman# Pacific Standard Time(PST) -same- 1082742Swollman# Yukon Standard Time(YST) -same- 1092742Swollman# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 1102742Swollman# Nome Standard Time (NT) Bering Standard Time (BST) 1112742Swollman# 1122742Swollman# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 1132742Swollman# The YST zone now covers nearly all of the state, AHST just part 1142742Swollman# of the Aleutian islands. No DST. 1152742Swollman 11614343Swollman# From Paul Eggert (1995-12-19): 11714343Swollman# The tables below use `NST', not `NT', for Nome Standard Time. 11814343Swollman# I invented `CAWT' for Central Alaska War Time. 11914343Swollman 12019878Swollman# From U. S. Naval Observatory (1989-01-19): 1212742Swollman# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 1222742Swollman# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 1232742Swollman# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 1242742Swollman# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 1252742Swollman# USA MOUNTAIN 7 H BEHIND UTC DENVER 1262742Swollman# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 1272742Swollman# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 1282742Swollman# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 1292742Swollman# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 1302742Swollman# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 1312742Swollman# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 1322742Swollman# USA - " - 9 H BEHIND UTC APR 3 - OCT 30 1332742Swollman# USA HAWAII 10 H BEHIND UTC 1342742Swollman# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 1352742Swollman 13619878Swollman# From Arthur David Olson (1989-01-21): 1372742Swollman# The above dates are for 1988. 1382742Swollman# Note the "AKST" and "AKDT" abbreviations, the claim that there's 1392742Swollman# no DST in Samoa, and the claim that there is DST in Alaska and the 1402742Swollman# Aleutians. 1412742Swollman 14219878Swollman# From Arthur David Olson (1988-02-13): 1432742Swollman# Legal standard time zone names, from United States Code (1982 Edition and 1442742Swollman# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 14519878Swollman# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 1462742Swollman# took effect), as explained in sections 263 and 261: 1472742Swollman# (none) 1482742Swollman# United States standard eastern time 1492742Swollman# United States standard mountain time 1502742Swollman# United States standard central time 1512742Swollman# United States standard Pacific time 1522742Swollman# (none) 1532742Swollman# United States standard Alaska time 1542742Swollman# (none) 15519878Swollman# Next, names from 1967-04-01 until 1983-11-30 (the date for 1562742Swollman# public law 98-181): 1572742Swollman# Atlantic standard time 1582742Swollman# eastern standard time 1592742Swollman# central standard time 1602742Swollman# mountain standard time 1612742Swollman# Pacific standard time 1622742Swollman# Yukon standard time 1632742Swollman# Alaska-Hawaii standard time 1642742Swollman# Bering standard time 16519878Swollman# And after 1983-11-30: 1662742Swollman# Atlantic standard time 1672742Swollman# eastern standard time 1682742Swollman# central standard time 1692742Swollman# mountain standard time 1702742Swollman# Pacific standard time 1712742Swollman# Alaska standard time 1722742Swollman# Hawaii-Aleutian standard time 1732742Swollman# Samoa standard time 1742742Swollman# The law doesn't give abbreviations. 17514343Swollman# 17614343Swollman# From Paul Eggert (1995-12-19): 17714343Swollman# Shanks uses 1983-10-30, not 1983-11-30, for the 1983 transitions. 17814343Swollman# Go with Shanks. 1792742Swollman 18014343Swollman# US Eastern time, represented by New York 18167578Swollman 18267578Swollman# Connecticut, Delaware, District of Columbia, most of Florida, 18367578Swollman# Georgia, far southeastern Indiana, eastern Kentucky, Maine, 18467578Swollman# Maryland, Massachusetts, New Hampshire, New Jersey, New York, North 18567578Swollman# Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, eastern 18667578Swollman# Tennessee, Vermont, Virginia, West Virginia 18767578Swollman 18814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 18914343SwollmanRule NYC 1920 only - Mar lastSun 2:00 1:00 D 19014343SwollmanRule NYC 1920 only - Oct lastSun 2:00 0 S 19114343SwollmanRule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 19214343SwollmanRule NYC 1921 1954 - Sep lastSun 2:00 0 S 19314343SwollmanRule NYC 1955 1966 - Oct lastSun 2:00 0 S 19414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19514343SwollmanZone America/New_York -4:56:02 - LMT 1883 Nov 18 12:00 19614343Swollman -5:00 US E%sT 1920 19714343Swollman -5:00 NYC E%sT 1942 19814343Swollman -5:00 US E%sT 1946 19914343Swollman -5:00 NYC E%sT 1967 20014343Swollman -5:00 US E%sT 2012742Swollman 20214343Swollman# US Central time, represented by Chicago 20367578Swollman 20467578Swollman# Alabama, Arkansas, Florida panhandle, Illinois, western Indiana 20567578Swollman# corners, Iowa, most of Kansas, western Kentucky, Louisiana, 20667578Swollman# Minnesota, Mississippi, Missouri, eastern Nebraska, eastern North 20767578Swollman# Dakota, Oklahoma, eastern South Dakota, western Tennessee, most of 20867578Swollman# Texas, Wisconsin 20967578Swollman 21014343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 21114343SwollmanRule Chicago 1920 only - Jun 13 2:00 1:00 D 21214343SwollmanRule Chicago 1920 1921 - Oct lastSun 2:00 0 S 21314343SwollmanRule Chicago 1921 only - Mar lastSun 2:00 1:00 D 21414343SwollmanRule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 21514343SwollmanRule Chicago 1922 1954 - Sep lastSun 2:00 0 S 21614343SwollmanRule Chicago 1955 1966 - Oct lastSun 2:00 0 S 21714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 21814343SwollmanZone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:00 21914343Swollman -6:00 US C%sT 1920 22014343Swollman -6:00 Chicago C%sT 1936 Mar 1 2:00 22114343Swollman -5:00 - EST 1936 Nov 15 2:00 22214343Swollman -6:00 Chicago C%sT 1942 22314343Swollman -6:00 US C%sT 1946 22414343Swollman -6:00 Chicago C%sT 1967 22514343Swollman -6:00 US C%sT 2262742Swollman 22714343Swollman# US Mountain time, represented by Denver 22867578Swollman# 22967578Swollman# Colorado, southern Idaho, far western Kansas, Montana, western 23067578Swollman# Nebraska, New Mexico, southwestern North Dakota, far eastern Oregon, 23167578Swollman# western South Dakota, far western Texas, Utah, Wyoming 23267578Swollman# 23314343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 23414343SwollmanRule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 23514343SwollmanRule Denver 1920 only - Oct lastSun 2:00 0 S 23614343SwollmanRule Denver 1921 only - May 22 2:00 0 S 23714343SwollmanRule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 23814343SwollmanRule Denver 1965 1966 - Oct lastSun 2:00 0 S 2392742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 24014343SwollmanZone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00 24115309Swollman -7:00 US M%sT 1920 24215309Swollman -7:00 Denver M%sT 1942 24315309Swollman -7:00 US M%sT 1946 24415309Swollman -7:00 Denver M%sT 1967 24515309Swollman -7:00 US M%sT 2462742Swollman 24714343Swollman# US Pacific time, represented by Los Angeles 24867578Swollman# 24967578Swollman# California, northern Idaho, Nevada, most of Oregon, and Washington 25067578Swollman# 25114343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 25214343SwollmanRule CA 1948 only - Mar 14 2:00 1:00 D 25314343SwollmanRule CA 1949 only - Jan 1 2:00 0 S 25414343SwollmanRule CA 1950 1966 - Apr lastSun 2:00 1:00 D 25514343SwollmanRule CA 1950 1961 - Sep lastSun 2:00 0 S 25614343SwollmanRule CA 1962 1966 - Oct lastSun 2:00 0 S 25714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25814343SwollmanZone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:00 25914343Swollman -8:00 US P%sT 1946 26014343Swollman -8:00 CA P%sT 1967 26114343Swollman -8:00 US P%sT 2628029Swollman 26314343Swollman# Alaska 26414343Swollman# AK%sT is the modern abbreviation for -9:00 per USNO. 26514343Swollman# 26614343Swollman# From Paul Eggert (1995-12-19): 26714343Swollman# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 26819878Swollman# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 26919878Swollman# This was on 1867-10-18. We omit this transition, since we can't represent 27019878Swollman# changes from Julian to Gregorian. 27114343Swollman# 27214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 27314343SwollmanZone America/Juneau -8:57:41 - LMT 1900 Aug 20 12:00 27414343Swollman -8:00 - PST 1942 27514343Swollman -8:00 US P%sT 1946 27614343Swollman -8:00 - PST 1969 27714343Swollman -8:00 US P%sT 1983 Oct 30 2:00 27814343Swollman -9:00 US AK%sT 27914343SwollmanZone America/Yakutat -9:18:55 - LMT 1900 Aug 20 12:00 28014343Swollman -9:00 - YST 1942 28114343Swollman -9:00 US Y%sT 1946 28214343Swollman -9:00 - YST 1969 28314343Swollman -9:00 US Y%sT 1983 Oct 30 2:00 28414343Swollman -9:00 US AK%sT 28514343SwollmanZone America/Anchorage -9:59:36 - LMT 1900 Aug 20 12:00 28614343Swollman -10:00 - CAT 1942 28714343Swollman -10:00 US CAT/CAWT 1946 28814343Swollman -10:00 - CAT 1967 Apr 28914343Swollman -10:00 - AHST 1969 29014343Swollman -10:00 US AH%sT 1983 Oct 30 2:00 29114343Swollman -9:00 US AK%sT 29214343SwollmanZone America/Nome -11:01:38 - LMT 1900 Aug 20 12:00 29314343Swollman -11:00 - NST 1942 29414343Swollman -11:00 US N%sT 1946 29514343Swollman -11:00 - NST 1967 Apr 29614343Swollman -11:00 - BST 1969 29714343Swollman -11:00 US B%sT 1983 Oct 30 2:00 29814343Swollman -9:00 US AK%sT 29914343SwollmanZone America/Adak -11:46:38 - LMT 1900 Aug 20 12:00 30014343Swollman -11:00 - NST 1942 30114343Swollman -11:00 US N%sT 1946 30214343Swollman -11:00 - NST 1967 Apr 30314343Swollman -11:00 - BST 1969 30414343Swollman -11:00 US B%sT 1983 Oct 30 2:00 30514343Swollman -10:00 US HA%sT 30614343Swollman# Shanks writes that part of southwest Alaska (e.g. Aniak) 30714343Swollman# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 30814343Swollman# and another part (e.g. Akiak) made the same switch five weeks later. 30914343Swollman# These switches don't quite make our 1970 cutoff. 3102742Swollman 31114343Swollman# Hawaii 31214343Swollman# 31314343Swollman# From Arthur David Olson: 31414343Swollman# And then there's Hawaii. 31514343Swollman# DST was observed for one day in 1933; 31614343Swollman# standard time was changed by half an hour in 1947; 31714343Swollman# it's always standard as of 1986. 31814343Swollman# 31914343Swollman# From Paul Eggert: 32014343Swollman# Shanks says the 1933 experiment lasted for three weeks. Go with Shanks. 32114343Swollman# 32214343SwollmanZone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00 32314343Swollman -10:30 - HST 1933 Apr 30 2:00 32414343Swollman -10:30 1:00 HDT 1933 May 21 2:00 32514343Swollman -10:30 US H%sT 1947 Jun 8 2:00 32614343Swollman -10:00 - HST 3272742Swollman 32814343Swollman# Now we turn to US areas that have diverged from the consensus since 1970. 32914343Swollman 33014343Swollman# Arizona mostly uses MST. 33114343SwollmanZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 12:00 33214343Swollman -7:00 US M%sT 1944 Jan 1 00:01 33314343Swollman -7:00 - MST 1944 Mar 17 00:01 33414343Swollman -7:00 US M%sT 1944 Oct 1 00:01 33514343Swollman -7:00 - MST 1967 33614343Swollman -7:00 US M%sT 1968 33714343Swollman -7:00 - MST 33819878Swollman# From Arthur David Olson (1988-02-13): 33914343Swollman# A writer from the Inter Tribal Council of Arizona, Inc., 3402742Swollman# notes in private correspondence dated 12/28/87 that "Presently, only the 3412742Swollman# Navajo Nation participates in the Daylight Saving Time policy, due to its 3422742Swollman# large size and location in three states." (The "only" means that other 3432742Swollman# tribal nations don't use DST.) 3442742Swollman 34514343SwollmanLink America/Denver America/Shiprock 3462742Swollman 34714343Swollman# Southern Idaho and eastern Oregon switched four weeks late in 1974. 34814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 34914343SwollmanZone America/Boise -7:44:49 - LMT 1883 Nov 18 12:00 35014343Swollman -8:00 US P%sT 1923 May 13 2:00 35114343Swollman -7:00 US M%sT 1974 35214343Swollman -7:00 - MST 1974 Feb 3 2:00 35314343Swollman -7:00 US M%sT 3542742Swollman 35514343Swollman# Indiana 35614343Swollman# 35758787Sru# For a map of Indiana's time zone regions, see: 35858787Sru# <a href="http://www.mccsc.edu/time.html"> 35958787Sru# What time is it in Indiana? 36058787Sru# </a> (1999-04-06) 36158787Sru# 36214343Swollman# From Paul Eggert (1995-12-19): 36314343Swollman# Indiana generally observes either EST all year, or CST/CDT, 36414343Swollman# but areas near Cincinnati and Louisville use those cities' timekeeping 36514343Swollman# and in 1969 and 1970 the whole state observed daylight time; 36614343Swollman# and there are other exceptions as noted below. 36714343Swollman# Shanks partitions Indiana into 345 regions, each with its own time history, 36814343Swollman# and writes ``Even newspaper reports present contradictory information.'' 36914343Swollman# Fortunately, most of the complexity occurred before our cutoff date of 1970. 37014343Swollman# 37114343Swollman# Since 1970, EST-only Indiana has been like America/Indianapolis, 37214343Swollman# with exceptions noted below for Crawford, Starke, and Switzerland counties. 37314343Swollman# The parts of Indiana not listed below have been like America/Chicago, 37414343Swollman# America/Louisville, or America/New_York. 37514343Swollman# 37614343Swollman# Other than Indianapolis, the Indiana place names are so nondescript 37714343Swollman# that they would be ambiguous if we left them at the `America' level. 37814343Swollman# So we reluctantly put them all in a subdirectory `America/Indiana'. 37914343Swollman# 38014343Swollman# Most of EST-only Indiana last observed DST in 1970. 38114343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 38214343SwollmanRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 38314343SwollmanRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 38414343SwollmanRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 38514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 38614343SwollmanZone America/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:00 38714343Swollman -6:00 US C%sT 1920 38814343Swollman -6:00 Indianapolis C%sT 1942 38914343Swollman -6:00 US C%sT 1946 39014343Swollman -6:00 Indianapolis C%sT 1955 Apr 24 2:00 39114343Swollman -5:00 - EST 1957 Sep 29 2:00 39214343Swollman -6:00 - CST 1958 Apr 27 2:00 39314343Swollman -5:00 - EST 1969 39414343Swollman -5:00 US E%sT 1971 39514343Swollman -5:00 - EST 39614343SwollmanLink America/Indianapolis America/Indiana/Indianapolis 3972742Swollman# 39814343Swollman# Part of Crawford County, Indiana, last observed DST in 1975, 39914343Swollman# and left its clocks alone in 1974. 40014343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 40114343SwollmanRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 40214343SwollmanRule Marengo 1951 only - Sep lastSun 2:00 0 S 40314343SwollmanRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 40414343SwollmanRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 40514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 40614343SwollmanZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:00 40714343Swollman -6:00 US C%sT 1951 40814343Swollman -6:00 Marengo C%sT 1961 Apr 30 2:00 40914343Swollman -5:00 - EST 1969 41014343Swollman -5:00 US E%sT 1974 Jan 6 2:00 41114343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 41214343Swollman -5:00 US E%sT 1976 41314343Swollman -5:00 - EST 41414343Swollman# 41514343Swollman# Starke County, Indiana 41619878Swollman# From Arthur David Olson (1991-10-28): 41719878Swollman# An article on page A3 of the Sunday, 1991-10-27 Washington Post 41814343Swollman# notes that Starke County switched from Central time to Eastern time as of 41919878Swollman# 1991-10-27. 42014343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 42114343SwollmanRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 42214343SwollmanRule Starke 1947 1954 - Sep lastSun 2:00 0 S 42314343SwollmanRule Starke 1955 1956 - Oct lastSun 2:00 0 S 42414343SwollmanRule Starke 1957 1958 - Sep lastSun 2:00 0 S 42514343SwollmanRule Starke 1959 1961 - Oct lastSun 2:00 0 S 42614343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 42714343SwollmanZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:00 42814343Swollman -6:00 US C%sT 1947 42914343Swollman -6:00 Starke C%sT 1962 Apr 29 2:00 43014343Swollman -5:00 - EST 1963 Oct 27 2:00 43114343Swollman -6:00 US C%sT 1991 Oct 27 2:00 43214343Swollman -5:00 - EST 43314343Swollman# 43414343Swollman# Switzerland County, Indiana, last observed DST in 1972. 43514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 43614343SwollmanZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:00 43714343Swollman -6:00 US C%sT 1954 Apr 25 2:00 43814343Swollman -5:00 - EST 1969 43914343Swollman -5:00 US E%sT 1973 44014343Swollman -5:00 - EST 4412742Swollman 44214343Swollman# Part of Kentucky left its clocks alone in 1974. 44367578Swollman# This also includes a part of Indiana immediately adjacent to Louisville. 44414343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 44514343SwollmanRule Louisville 1921 only - May 1 2:00 1:00 D 44614343SwollmanRule Louisville 1921 only - Sep 1 2:00 0 S 44714343SwollmanRule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 44814343SwollmanRule Louisville 1941 only - Sep lastSun 2:00 0 S 44914343SwollmanRule Louisville 1946 only - Jun 2 2:00 0 S 45014343SwollmanRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 45114343SwollmanRule Louisville 1956 1960 - Oct lastSun 2:00 0 S 45214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 45314343SwollmanZone America/Louisville -5:43:02 - LMT 1883 Nov 18 12:00 45414343Swollman -6:00 US C%sT 1921 45514343Swollman -6:00 Louisville C%sT 1942 45614343Swollman -6:00 US C%sT 1946 45714343Swollman -6:00 Louisville C%sT 1961 Jul 23 2:00 45814343Swollman -5:00 - EST 1968 45914343Swollman -5:00 US E%sT 1974 Jan 6 2:00 46014343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 46114343Swollman -5:00 US E%sT 46267578SwollmanLink America/Louisville America/Kentucky/Louisville 46367578Swollman# 46458787Sru# Wayne, Clinton, and Russell Counties, Kentucky 46558787Sru# 46658787Sru# From 46758787Sru# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 46858787Sru# Lake Cumberland LIFE 46958787Sru# </a> (1999-01-29) via WKYM-101.7: 47058787Sru# Clinton County has joined Wayne County in asking the DoT to change from 47158787Sru# the Central to the Eastern time zone.... The Wayne County government made 47258787Sru# the same request in December. And while Russell County officials have not 47358787Sru# taken action, the majority of respondents to a poll conducted there in 47458787Sru# August indicated they would like to change to "fast time" also. 47558787Sru# The three Lake Cumberland counties are the farthest east of any U.S. 47658787Sru# location in the Central time zone. 47767578Swollman# 47867578Swollman# From Rich Wales (2000-08-29): 47967578Swollman# After prolonged debate, and despite continuing deep differences of opinion, 48067578Swollman# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 48167578Swollman# (-0500) time. They won't "fall back" this year. See: 48267578Swollman# <a href="http://www.nandotimes.com/nation/story/body/0,1037,500244845-500362432-502132762-0,00.html"> 48367578Swollman# Sara Shipley, the difference an hour makes (2000-08-29 15:33 -0400) 48467578Swollman# </a> 48567578SwollmanZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:00 48667578Swollman -6:00 US C%sT 1946 48767578Swollman -6:00 - CST 1968 48867578Swollman -6:00 US C%sT 2000 Oct 29 2:00 48967578Swollman -5:00 US E%sT 4902742Swollman 49167578Swollman 49267578Swollman# From Rives McDow (2000-08-30): 49367578Swollman# Here ... are all the changes in the US since 1985. 49467578Swollman# Kearny County, KS (put all of county on central; 49567578Swollman# previously split between MST and CST) ... 1990-10 49667578Swollman# Starke County, IN (from CST to EST) ... 1991-10 49767578Swollman# Oliver County, ND (from MST to CST) ... 1992-10 49867578Swollman# West Wendover, NV (from PST TO MST) ... 1999-10 49967578Swollman# Wayne County, KY (from CST to EST) ... 2000-10 50067578Swollman# There is another change in the offing; Mercer County, ND is looking 50167578Swollman# to change from MT to CT. It is possible that two other ND counties 50267578Swollman# (Sioux and Morton) will look to change also. If made, the earliest 50367578Swollman# a change would be effective is October 2001. 50467578Swollman# 50567578Swollman# From Paul Eggert (2000-10-02): 50667578Swollman# FIXME: I haven't yet had time to incorporate all the above changes. 50767578Swollman 50814343Swollman# Michigan 50914343Swollman# 51019878Swollman# From Bob Devine (1988-01-28): 51114343Swollman# Michigan didn't observe DST from 1968 to 1973. 51214343Swollman# 51358787Sru# From Paul Eggert (1999-03-31): 51458787Sru# Shanks writes that Michigan started using standard time on 1885-09-18, 51558787Sru# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 51658787Sru# that Detroit kept 51714343Swollman# 51814343Swollman# local time until 1900 when the City Council decreed that clocks should 51914343Swollman# be put back twenty-eight minutes to Central Standard Time. Half the 52014343Swollman# city obeyed, half refused. After considerable debate, the decision 52114343Swollman# was rescinded and the city reverted to Sun time. A derisive offer to 52214343Swollman# erect a sundial in front of the city hall was referred to the 52314343Swollman# Committee on Sewers. Then, in 1905, Central time was adopted 52414343Swollman# by city vote. 52514343Swollman# 52614343Swollman# This story is too entertaining to be false, so go with Howse over Shanks. 52714343Swollman# 52814343Swollman# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 52914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 53014343SwollmanRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 53114343SwollmanRule Detroit 1948 only - Sep lastSun 2:00 0 S 53214343SwollmanRule Detroit 1967 only - Jun 14 2:00 1:00 D 53314343SwollmanRule Detroit 1967 only - Oct lastSun 2:00 0 S 53414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 53514343SwollmanZone America/Detroit -5:32:11 - LMT 1905 53614343Swollman -6:00 - CST 1915 May 15 2:00 53714343Swollman -5:00 - EST 1942 53814343Swollman -5:00 US E%sT 1946 53914343Swollman -5:00 Detroit E%sT 1973 54014343Swollman -5:00 US E%sT 1975 54114343Swollman -5:00 - EST 1975 Apr 27 2:00 54214343Swollman -5:00 US E%sT 54314343Swollman# 54414343Swollman# The Michigan border with Wisconsin switched from EST to CST/CDT in 1973. 54514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 54614343SwollmanRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 54714343SwollmanRule Menominee 1946 only - Sep lastSun 2:00 0 S 54814343SwollmanRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 54914343SwollmanRule Menominee 1966 only - Oct lastSun 2:00 0 S 55014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 55114343SwollmanZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 55214343Swollman -6:00 US C%sT 1946 55314343Swollman -6:00 Menominee C%sT 1969 Apr 27 2:00 55414343Swollman -5:00 - EST 1973 Apr 29 2:00 55514343Swollman -6:00 US C%sT 55614343Swollman 5572742Swollman# Navassa 55843543Swollman# claimed by US under the provisions of the 1856 Guano Islands Act 55943543Swollman# also claimed by Haiti 56043543Swollman# occupied 1857/1900 by the Navassa Phosphate Co 56143543Swollman# US lighthouse 1917/1997-01 56243543Swollman# currently uninhabited 56343543Swollman# see Mark Fineman, ``An Isle Rich in Guano and Discord'', 56443543Swollman# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 56543543Swollman# Jimmy Skaggs, _The Great Guano Rush_ (1994). 56614343Swollman 56719878Swollman# Old names, for S5 users 56819878Swollman 56919878Swollman# Link LINK-FROM LINK-TO 57019878SwollmanLink America/New_York EST5EDT 57119878SwollmanLink America/Chicago CST6CDT 57219878SwollmanLink America/Denver MST7MDT 57319878SwollmanLink America/Los_Angeles PST8PDT 57419878SwollmanLink America/Indianapolis EST 57519878SwollmanLink America/Phoenix MST 57619878SwollmanLink Pacific/Honolulu HST 57719878Swollman 5782742Swollman################################################################################ 5792742Swollman 5802742Swollman 58158787Sru# From Paul Eggert <eggert@twinsun.com> (1999-10-29): 58214343Swollman# A good source for time zone historical data outside the US is 58358787Sru# Thomas G. Shanks, The International Atlas (5th edition), 58458787Sru# San Diego: ACS Publications, Inc. (1999). 5852742Swollman# 58658787Sru# Gwillim Law <Gwil_Law@bridge-point.com> writes that a good source 58720094Swollman# for recent time zone data is the International Air Transport 58820094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 58920094Swollman# published semiannually. Law sent in several helpful summaries 59020094Swollman# of the IATA's data after 1990. 59120094Swollman# 59220094Swollman# Except where otherwise noted, Shanks is the source for entries through 1990, 59320094Swollman# and IATA SSIM is the source for entries after 1990. 59420094Swollman# 5952742Swollman# Another source occasionally used is Edward W. Whitman, World Time Differences, 5962742Swollman# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which 5972742Swollman# I found in the UCLA library. 5982742Swollman# 5999908Swollman# See the `europe' file for Greenland. 6002742Swollman 6012742Swollman# Canada 6022742Swollman 6039908Swollman# From Alain LaBont<e'> <ALB@immedia.ca> (1994-11-14): 6049908Swollman# I post here the time zone abbreviations standardized in Canada 6059908Swollman# for both English and French in the CAN/CSA-Z234.4-89 standard.... 6069908Swollman# 6079908Swollman# UTC Standard time Daylight savings time 6089908Swollman# offset French English French English 6099908Swollman# -2:30 - - HAT NDT 6109908Swollman# -3 - - HAA ADT 6119908Swollman# -3:30 HNT NST - - 6129908Swollman# -4 HNA AST HAE EDT 6139908Swollman# -5 HNE EST HAC CDT 6149908Swollman# -6 HNC CST HAR MDT 6159908Swollman# -7 HNR MST HAP PDT 6169908Swollman# -8 HNP PST HAY YDT 6179908Swollman# -9 HNY YST - - 6189908Swollman# 6199908Swollman# HN: Heure Normale ST: Standard Time 6209908Swollman# HA: Heure Avanc<e'>e DT: Daylight saving Time 6219908Swollman# 6229908Swollman# A: de l'Atlantique Atlantic 6239908Swollman# C: du Centre Central 6249908Swollman# E: de l'Est Eastern 6259908Swollman# M: Mountain 6269908Swollman# N: Newfoundland 6279908Swollman# P: du Pacifique Pacific 6289908Swollman# R: des Rocheuses 6299908Swollman# T: de Terre-Neuve 6309908Swollman# Y: du Yukon Yukon 6319908Swollman# 6329908Swollman# From Paul Eggert <eggert@twinsun.com> (1994-11-22): 6339908Swollman# Alas, this sort of thing must be handled by localization software. 6342742Swollman 63567578Swollman# Unless otherwise specified, the data for Canada are all from Shanks. 6369908Swollman 63767578Swollman# From Paul Eggert (2000-10-02): 63867578Swollman# H. David Matthews and Mary Vincent's map 63967578Swollman# <a href="http://www.canadiangeographic.ca/SO98/geomap.htm"> 64067578Swollman# "It's about TIME", _Canadian Geographic_ (September-October 1998) 64167578Swollman# </a> contains detailed boundaries for regions observing nonstandard 64267578Swollman# time and daylight saving time arrangements in Canada circa 1998. 64367578Swollman# 64467578Swollman# INMS, the Institute for National Measurement Standards in Ottawa, has 64567578Swollman# <a href="http://www.nrc.ca/inms/time/tze.html"> 64667578Swollman# information about standard and daylight saving time zones in Canada. 64767578Swollman# </a> (updated periodically). 64867578Swollman# Its unofficial information is often taken from Matthews and Vincent. 6499908Swollman 6502742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 65117200SwollmanRule Canada 1918 only - Apr 14 2:00 1:00 D 65217200SwollmanRule Canada 1918 only - Oct 31 2:00 0 S 65317200SwollmanRule Canada 1942 only - Feb 9 2:00 1:00 D 65417200SwollmanRule Canada 1945 only - Sep 30 2:00 0 S 65517200SwollmanRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 65617200SwollmanRule Canada 1974 max - Oct lastSun 2:00 0 S 65717200SwollmanRule Canada 1987 max - Apr Sun>=1 2:00 1:00 D 65817200Swollman 65917200Swollman 66067578Swollman# Newfoundland (and far southeast Labrador) 66117200Swollman 66267578Swollman# From Paul Eggert (2000-10-02): 66367578Swollman# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 66467578Swollman# but the only part of Labrador that follows the rules is the 66567578Swollman# southeast corner, including Port Hope Simpson and Mary's Harbour, 66667578Swollman# but excluding, say, Black Tickle. 66767578Swollman 66817200Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 6692742SwollmanRule StJohns 1917 1918 - Apr Sun>=8 2:00 1:00 D 6702742SwollmanRule StJohns 1917 only - Sep 17 2:00 0 S 6712742SwollmanRule StJohns 1918 only - Oct 31 2:00 0 S 6722742Swollman# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks. 6732742SwollmanRule StJohns 1919 only - May 5 23:00 1:00 D 6742742SwollmanRule StJohns 1919 only - Aug 12 23:00 0 S 6752742Swollman# For 1931-1935 Whitman gives Apr same date; go with Shanks. 6762742SwollmanRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 6772742SwollmanRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 6782742Swollman# For 1936-1941 Shanks gives May Mon>=9 and Oct Mon>=2; go with Whitman. 6792742SwollmanRule StJohns 1936 1941 - May Sun>=8 0:00 1:00 D 6802742SwollmanRule StJohns 1936 1941 - Oct Sun>=1 0:00 0 S 6812742Swollman# Shanks gives 1942 May 11 - 1945 Sep 30; go with Whitman. 6822742SwollmanRule StJohns 1942 only - Mar 1 0:00 1:00 D 6832742SwollmanRule StJohns 1942 only - Dec 31 0:00 0 S 6842742SwollmanRule StJohns 1943 only - May 30 0:00 1:00 D 6852742SwollmanRule StJohns 1943 only - Sep 5 0:00 0 S 6862742SwollmanRule StJohns 1944 only - Jul 10 0:00 1:00 D 6872742SwollmanRule StJohns 1944 only - Sep 2 0:00 0 S 6882742SwollmanRule StJohns 1945 only - Jan 1 0:00 1:00 D 6892742SwollmanRule StJohns 1945 only - Oct 7 2:00 0 S 6902742Swollman# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 6912742Swollman# Apr 30 - Sep 24; go with Shanks. 6922742SwollmanRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 6932742SwollmanRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 6942742SwollmanRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 6952742SwollmanRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 69667578SwollmanRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 69767578Swollman# From Paul Eggert (2000-10-02): 69867578Swollman# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 69967578Swollman# at 00:01 local time. For now, assume it started in 1987. 70067578SwollmanRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 70167578SwollmanRule StJohns 1987 max - Oct lastSun 0:01 0 S 70267578SwollmanRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 70367578SwollmanRule StJohns 1989 max - Apr Sun>=1 0:01 1:00 D 7042742Swollman# St John's has an apostrophe, but Posix file names can't have apostrophes. 7052742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 7062742SwollmanZone America/St_Johns -3:30:52 - LMT 1884 70720094Swollman -3:30:52 StJohns N%sT 1935 Mar 30 7082742Swollman -3:30 StJohns N%sT 7092742Swollman 7108029Swollman 71167578Swollman# most of east Labrador 71217200Swollman 71320094Swollman# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. 71420094Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 71520094SwollmanZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 71620094Swollman -3:30:52 StJohns NST 1919 71720094Swollman -3:30:52 - NST 1935 Mar 30 71820094Swollman -3:30 - NST 1936 71920094Swollman -3:30 StJohns N%sT 1966 Mar 15 2:00 72020094Swollman -4:00 StJohns A%sT 72120094Swollman 72220094Swollman 72320094Swollman# west Labrador, New Brunswick, Nova Scotia, Prince Edward I 72420094Swollman 72517200Swollman# From Paul Eggert (1996-06-12): 72617200Swollman# Shanks writes that since 1970 most of this region has been like Halifax. 72717200Swollman# Many locales did not observe peacetime DST until 1972; 72817200Swollman# Glace Bay, NS is the largest that we know of. 72917200Swollman# Shanks also writes that Liverpool, NS was the only town in Canada to observe 73017200Swollman# DST in 1971 but not 1970; for now we'll assume this is a typo. 73117200Swollman 73267578Swollman# From Paul Eggert (2000-10-02): 73367578Swollman# INMS (2000-09-12) says that, since 1988 at least, New Brunswick switches 73467578Swollman# at 00:01 local time. FIXME: verify and create a new Zone for this. 73567578Swollman 73667578Swollman 7372742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 7382742SwollmanRule Halifax 1916 only - Apr 1 0:00 1:00 D 7392742SwollmanRule Halifax 1916 only - Oct 1 0:00 0 S 7402742SwollmanRule Halifax 1918 only - Apr 14 2:00 1:00 D 7412742SwollmanRule Halifax 1918 only - Oct 31 2:00 0 S 7422742SwollmanRule Halifax 1920 only - May 9 0:00 1:00 D 7432742SwollmanRule Halifax 1920 only - Aug 29 0:00 0 S 7442742SwollmanRule Halifax 1921 only - May 6 0:00 1:00 D 7452742SwollmanRule Halifax 1921 1922 - Sep 5 0:00 0 S 7462742SwollmanRule Halifax 1922 only - Apr 30 0:00 1:00 D 7472742SwollmanRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 7482742SwollmanRule Halifax 1923 only - Sep 4 0:00 0 S 7492742SwollmanRule Halifax 1924 only - Sep 15 0:00 0 S 7502742SwollmanRule Halifax 1925 only - Sep 28 0:00 0 S 7512742SwollmanRule Halifax 1926 only - May 16 0:00 1:00 D 7522742SwollmanRule Halifax 1926 only - Sep 13 0:00 0 S 7532742SwollmanRule Halifax 1927 only - May 1 0:00 1:00 D 7542742SwollmanRule Halifax 1927 only - Sep 26 0:00 0 S 7552742SwollmanRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 7562742SwollmanRule Halifax 1928 only - Sep 9 0:00 0 S 7572742SwollmanRule Halifax 1929 only - Sep 3 0:00 0 S 7582742SwollmanRule Halifax 1930 only - Sep 15 0:00 0 S 7592742SwollmanRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 7602742SwollmanRule Halifax 1933 only - Apr 30 0:00 1:00 D 7612742SwollmanRule Halifax 1933 only - Oct 2 0:00 0 S 7622742SwollmanRule Halifax 1934 only - May 20 0:00 1:00 D 7632742SwollmanRule Halifax 1934 only - Sep 16 0:00 0 S 7642742SwollmanRule Halifax 1935 only - Jun 2 0:00 1:00 D 7652742SwollmanRule Halifax 1935 only - Sep 30 0:00 0 S 7662742SwollmanRule Halifax 1936 only - Jun 1 0:00 1:00 D 7672742SwollmanRule Halifax 1936 only - Sep 14 0:00 0 S 7682742SwollmanRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 7692742SwollmanRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 7702742SwollmanRule Halifax 1939 only - May 28 0:00 1:00 D 7712742SwollmanRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 7722742SwollmanRule Halifax 1942 only - Feb 9 2:00 1:00 D 7732742SwollmanRule Halifax 1945 1959 - Sep lastSun 2:00 0 S 7742742SwollmanRule Halifax 1946 1959 - Apr lastSun 2:00 1:00 D 7752742SwollmanRule Halifax 1962 1986 - Apr lastSun 2:00 1:00 D 7762742SwollmanRule Halifax 1962 max - Oct lastSun 2:00 0 S 7772742SwollmanRule Halifax 1987 max - Apr Sun>=1 2:00 1:00 D 7782742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 7792742SwollmanZone America/Halifax -4:14:24 - LMT 1902 Jun 15 7802742Swollman -4:00 Halifax A%sT 78117200SwollmanZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 78217200Swollman -4:00 Canada A%sT 1953 78317200Swollman -4:00 Halifax A%sT 1954 78417200Swollman -4:00 - AST 1972 78517200Swollman -4:00 Halifax A%sT 7862742Swollman 7878029Swollman 78817200Swollman# Ontario, Quebec 78917200Swollman 79017200Swollman# From Paul Eggert (1996-06-12): 79117200Swollman# Shanks writes that since 1970 most of this region has been like Montreal. 79217200Swollman# Thunder Bay skipped DST in 1973. 79317200Swollman# Many smaller locales did not observe peacetime DST until 1974; 79417200Swollman# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 79517200Swollman# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 79617200Swollman 79743014Swollman# From Paul Eggert (1997-10-17): 79843014Swollman# msb@sq.com writes that an article in the 1997-10-14 Toronto Star 79943014Swollman# says that Atikokan, Ontario currently does not observe DST, 80043014Swollman# but will vote on 11-10 whether to use EST/EDT. 80143014Swollman# He also writes that the 80243014Swollman# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 80343014Swollman# Ontario Time Act (1990, Chapter T.9) 80443014Swollman# </a> 80543014Swollman# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 80643014Swollman# Officially Atikokan is therefore on CST/CDT, and most likely this report 80743014Swollman# concerns a non-official time observed as a matter of local practice. 80858787Sru# For what it's worth, Shanks says that Atikokan has agreed with 80943014Swollman# Rainy River ever since standard time was introduced. 81043014Swollman 81167578Swollman# From Paul Eggert (2000-10-02): 81267578Swollman# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 81367578Swollman# New Osnaburgh observe CST all year, that Big Trout Lake observes 81467578Swollman# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 81567578Swollman# violation of the official Ontario rules. 81667578Swollman# They also write that Quebec east of the -63 meridian is supposed to 81767578Swollman# observe AST, but residents as far east as Natashquan use EST/EDT, 81867578Swollman# and residents east of Natashquan use AST. 81967578Swollman# We probably need Zones for far east Quebec and for Atikokan, 82067578Swollman# but we don't know when their practices started. 82167578Swollman 8222742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 8232742SwollmanRule Mont 1917 only - Mar 25 2:00 1:00 D 8242742SwollmanRule Mont 1917 only - Apr 24 0:00 0 S 8252742SwollmanRule Mont 1918 only - Apr 14 2:00 1:00 D 8262742SwollmanRule Mont 1918 only - Oct 31 2:00 0 S 8272742SwollmanRule Mont 1919 only - Mar 31 2:30 1:00 D 8282742SwollmanRule Mont 1919 only - Oct 25 2:30 0 S 8292742SwollmanRule Mont 1920 only - May 2 2:30 1:00 D 8302742SwollmanRule Mont 1920 only - Oct 3 2:30 0 S 8312742SwollmanRule Mont 1921 only - May 1 2:00 1:00 D 8322742SwollmanRule Mont 1921 only - Oct 2 2:30 0 S 8332742SwollmanRule Mont 1922 only - Apr 30 2:00 1:00 D 8342742SwollmanRule Mont 1922 only - Oct 1 2:30 0 S 8352742SwollmanRule Mont 1924 only - May 17 2:00 1:00 D 8362742SwollmanRule Mont 1924 1926 - Sep lastSun 2:30 0 S 8372742SwollmanRule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 8382742SwollmanRule Mont 1927 only - May 1 0:00 1:00 D 8392742SwollmanRule Mont 1927 1932 - Sep Sun>=25 0:00 0 S 8402742SwollmanRule Mont 1928 1931 - Apr Sun>=25 0:00 1:00 D 8412742SwollmanRule Mont 1932 only - May 1 0:00 1:00 D 8422742SwollmanRule Mont 1933 1940 - Apr Sun>=24 0:00 1:00 D 8432742SwollmanRule Mont 1933 only - Oct 1 0:00 0 S 8442742SwollmanRule Mont 1934 1939 - Sep Sun>=24 0:00 0 S 8452742SwollmanRule Mont 1945 1948 - Sep lastSun 2:00 0 S 8462742SwollmanRule Mont 1946 1986 - Apr lastSun 2:00 1:00 D 8472742SwollmanRule Mont 1949 1950 - Oct lastSun 2:00 0 S 8482742SwollmanRule Mont 1951 1956 - Sep lastSun 2:00 0 S 8492742SwollmanRule Mont 1957 max - Oct lastSun 2:00 0 S 8502742SwollmanRule Mont 1987 max - Apr Sun>=1 2:00 1:00 D 8512742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8522742SwollmanZone America/Montreal -4:54:16 - LMT 1884 8532742Swollman -5:00 Mont E%sT 85417200SwollmanZone America/Thunder_Bay -5:57:00 - LMT 1895 85517200Swollman -5:00 Canada E%sT 1970 85617200Swollman -5:00 Mont E%sT 1973 85717200Swollman -5:00 - EST 1974 85817200Swollman -5:00 Canada E%sT 85917200SwollmanZone America/Nipigon -5:53:04 - LMT 1895 86017200Swollman -5:00 Canada E%sT 86117200SwollmanZone America/Rainy_River -6:17:56 - LMT 1895 86217200Swollman -6:00 Canada C%sT 8632742Swollman 8648029Swollman 86517200Swollman# Manitoba 86619878Swollman 8672742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 8682742SwollmanRule Winn 1916 only - Apr 23 0:00 1:00 D 8692742SwollmanRule Winn 1916 only - Sep 17 0:00 0 S 8702742SwollmanRule Winn 1918 only - Apr 14 2:00 1:00 D 8712742SwollmanRule Winn 1918 only - Oct 31 2:00 0 S 8722742SwollmanRule Winn 1937 only - May 16 2:00 1:00 D 87314343SwollmanRule Winn 1937 only - Sep 26 2:00 0 S 8742742SwollmanRule Winn 1942 only - Feb 9 2:00 1:00 D 8752742SwollmanRule Winn 1945 only - Sep lastSun 2:00 0 S 8762742SwollmanRule Winn 1946 only - May 12 2:00 1:00 D 8772742SwollmanRule Winn 1946 only - Oct 13 2:00 0 S 8782742SwollmanRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 87914343SwollmanRule Winn 1947 1949 - Sep lastSun 2:00 0 S 88014343SwollmanRule Winn 1950 only - May 1 2:00 1:00 D 88114343SwollmanRule Winn 1950 only - Sep 30 2:00 0 S 88214343SwollmanRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 88314343SwollmanRule Winn 1951 1958 - Sep lastSun 2:00 0 S 8842742SwollmanRule Winn 1959 only - Oct lastSun 2:00 0 S 8852742SwollmanRule Winn 1960 only - Sep lastSun 2:00 0 S 8862742SwollmanRule Winn 1963 only - Apr lastSun 2:00 1:00 D 88714343SwollmanRule Winn 1963 only - Sep 22 2:00 0 S 8882742SwollmanRule Winn 1966 1986 - Apr lastSun 2:00 1:00 D 88967578SwollmanRule Winn 1966 1986 - Oct lastSun 2:00 0 S 8902742SwollmanRule Winn 1987 max - Apr Sun>=1 2:00 1:00 D 89167578Swollman# From Paul Eggert (2000-10-02): 89267578Swollman# INMS (2000-09-12) says that, since 1988 at least, Manitoba switches from 89367578Swollman# DST at 03:00 local time. For now, assume it started in 1987. 89467578SwollmanRule Winn 1987 max - Oct lastSun 2:00s 0 S 8952742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8962742SwollmanZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 8972742Swollman -6:00 Winn C%sT 8982742Swollman 8998029Swollman 90017200Swollman# Saskatchewan 90117200Swollman 90267578Swollman# From Paul Eggert (2000-10-02): 90317200Swollman# Shanks writes that since 1970 most of this region has been like Regina. 90417200Swollman# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 90517200Swollman# Other western towns (e.g. Lloydminster) are like Edmonton. 90667578Swollman# Matthews and Vincent (1998) write that Denare Beach and Creighton 90767578Swollman# are like Winnipeg, in violation of Saskatchewan law. 90817200Swollman 90919878Swollman# From W. Jones <jones@skdad.usask.ca> (1992-11-06): 91017200Swollman# The. . .below is based on information I got from our law library, the 91117200Swollman# provincial archives, and the provincial Community Services department. 91217200Swollman# A precise history would require digging through newspaper archives, and 91317200Swollman# since you didn't say what you wanted, I didn't bother. 91417200Swollman# 91517200Swollman# Saskatchewan is split by a time zone meridian (105W) and over the years 91617200Swollman# the boundary became pretty ragged as communities near it reevaluated 91717200Swollman# their affiliations in one direction or the other. In 1965 a provincial 91817200Swollman# referendum favoured legislating common time practices. 91917200Swollman# 92017200Swollman# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 92117200Swollman# Saskatchewan 1978) was proclaimed, and established that the eastern 92217200Swollman# part of Saskatchewan would use CST year round, that districts in 92317200Swollman# northwest Saskatchewan would by default follow CST but could opt to 92417200Swollman# follow Mountain Time rules (thus 1 hour difference in the winter and 92517200Swollman# zero in the summer), and that districts in southwest Saskatchewan would 92617200Swollman# by default follow MT but could opt to follow CST. 92717200Swollman# 92817200Swollman# It took a few years for the dust to settle (I know one story of a town 92917200Swollman# on one time zone having its school in another, such that a mom had to 93017200Swollman# serve her family lunch in two shifts), but presently it seems that only 93117200Swollman# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 93217200Swollman# rules any more; all other districts appear to have used CST year round 93317200Swollman# since sometime in the 1960s. 93417200Swollman 9352742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 9362742SwollmanRule Regina 1918 only - Apr 14 2:00 1:00 D 9372742SwollmanRule Regina 1918 only - Oct 31 2:00 0 S 9382742SwollmanRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 9392742SwollmanRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 9402742SwollmanRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 9412742SwollmanRule Regina 1937 only - Oct Sun>=8 0:00 0 S 9422742SwollmanRule Regina 1938 only - Oct Sun>=1 0:00 0 S 9432742SwollmanRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 9442742SwollmanRule Regina 1942 only - Feb 9 2:00 1:00 D 9452742SwollmanRule Regina 1945 only - Sep lastSun 2:00 0 S 94617200SwollmanRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 94717200SwollmanRule Regina 1946 only - Oct Sun>=8 2:00 0 S 94817200SwollmanRule Regina 1947 1959 - Apr lastSun 2:00 1:00 D 94917200SwollmanRule Regina 1947 1958 - Sep lastSun 2:00 0 S 95017200SwollmanRule Regina 1959 only - Oct lastSun 2:00 0 S 95117200Swollman# 95217200SwollmanRule Swift 1957 only - Apr lastSun 2:00 1:00 D 95317200SwollmanRule Swift 1957 only - Oct lastSun 2:00 0 S 95417200SwollmanRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 95517200SwollmanRule Swift 1959 only - Oct lastSun 2:00 0 S 95617200SwollmanRule Swift 1960 1961 - Sep lastSun 2:00 0 S 9572742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 95817200SwollmanZone America/Regina -6:58:36 - LMT 1905 Sep 95917200Swollman -7:00 Regina M%sT 1960 Apr lastSun 2:00 9602742Swollman -6:00 - CST 96117200SwollmanZone America/Swift_Current -7:11:20 - LMT 1905 Sep 96217200Swollman -7:00 Canada M%sT 1946 Apr lastSun 2:00 96317200Swollman -7:00 Regina M%sT 1950 96417200Swollman -7:00 Swift M%sT 1972 Apr lastSun 2:00 96517200Swollman -6:00 - CST 9662742Swollman 9678029Swollman 96817200Swollman# Alberta 96917200Swollman 9702742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 9712742SwollmanRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 9722742SwollmanRule Edm 1918 only - Oct 31 2:00 0 S 9732742SwollmanRule Edm 1919 only - May 27 2:00 0 S 9742742SwollmanRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 9752742SwollmanRule Edm 1920 only - Oct lastSun 2:00 0 S 9762742SwollmanRule Edm 1921 1923 - Sep lastSun 2:00 0 S 9772742SwollmanRule Edm 1942 only - Feb 9 2:00 1:00 D 9782742SwollmanRule Edm 1945 only - Sep lastSun 2:00 0 S 9792742SwollmanRule Edm 1947 only - Apr lastSun 2:00 1:00 D 9802742SwollmanRule Edm 1947 only - Sep lastSun 2:00 0 S 9812742SwollmanRule Edm 1967 only - Apr lastSun 2:00 1:00 D 9822742SwollmanRule Edm 1967 only - Oct lastSun 2:00 0 S 9832742SwollmanRule Edm 1969 only - Apr lastSun 2:00 1:00 D 9842742SwollmanRule Edm 1969 only - Oct lastSun 2:00 0 S 9852742SwollmanRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 9862742SwollmanRule Edm 1972 max - Oct lastSun 2:00 0 S 9872742SwollmanRule Edm 1987 max - Apr Sun>=1 2:00 1:00 D 9882742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 9892742SwollmanZone America/Edmonton -7:33:52 - LMT 1906 Sep 9902742Swollman -7:00 Edm M%sT 9912742Swollman 9928029Swollman 99317200Swollman# British Columbia 99417200Swollman 99567578Swollman# From Paul Eggert (2000-10-02): 99617200Swollman# Shanks writes that since 1970 most of this region has been like Vancouver. 99758787Sru# Dawson Creek uses MST. Much of east BC is like Edmonton. 99867578Swollman# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 99917200Swollman 10002742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 10012742SwollmanRule Vanc 1918 only - Apr 14 2:00 1:00 D 10022742SwollmanRule Vanc 1918 only - Oct 31 2:00 0 S 10032742SwollmanRule Vanc 1942 only - Feb 9 2:00 1:00 D 10042742SwollmanRule Vanc 1945 only - Sep 30 2:00 0 S 10052742SwollmanRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 10062742SwollmanRule Vanc 1946 only - Oct 13 2:00 0 S 10072742SwollmanRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 10082742SwollmanRule Vanc 1962 max - Oct lastSun 2:00 0 S 10092742SwollmanRule Vanc 1987 max - Apr Sun>=1 2:00 1:00 D 10102742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10112742SwollmanZone America/Vancouver -8:12:28 - LMT 1884 10122742Swollman -8:00 Vanc P%sT 101317200SwollmanZone America/Dawson_Creek -8:00:56 - LMT 1884 101417200Swollman -8:00 Canada P%sT 1947 101517200Swollman -8:00 Vanc P%sT 1972 Aug 30 2:00 101617200Swollman -7:00 - MST 10172742Swollman 10188029Swollman 101958787Sru# Northwest Territories, Nunavut, Yukon 102017200Swollman 102158787Sru# From Paul Eggert (1999-10-29): 102217200Swollman# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 102320094Swollman# Mathew Englander <mathew@io.org> (1996-10-07) gives the following refs: 102420094Swollman# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 102520094Swollman# c. 7 defines Yukon standard time as UTC-9. This is still valid; 102620094Swollman# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 102720094Swollman# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 102820094Swollman# * O.I.C. 1980/02 established DST. 102920094Swollman# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 103020094Swollman# Shanks says Yukon's 1973-10-28 switch was at 2:00; go with Englander. 103117200Swollman 103258787Sru# From Rives McDow (1999-09-04): 103358787Sru# Nunavut ... moved ... to incorporate the whole territory into one time zone. 103458787Sru# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 103558787Sru# Nunavut moves to single time zone Oct. 31 103658787Sru# </a> 103758787Sru# 103858787Sru# From Antoine Leca (1999-09-06): 103958787Sru# We then need to create a new timezone for the Kitikmeot region of Nunavut 104058787Sru# to differentiate it from the Yellowknife region. 104158787Sru 104258787Sru# From Paul Eggert (1999-09-20): 104358787Sru# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 104458787Sru# Basic Facts: The New Territory 104558787Sru# </a> (1999) reports that Pangnirtung operates on Eastern time, 104658787Sru# and that Coral Harbour does not observe DST. We don't know when 104758787Sru# Pangnirtung switched to Eastern time; we'll guess 1995. 104858787Sru# We'll ignore the claim about Coral Harbour for now, 104958787Sru# since we have no further info. 105058787Sru 105158787Sru# From Rives McDow (1999-11-08): 105258787Sru# On October 31, when the rest of Nunavut went to Central time, 105358787Sru# Pangnirtung wobbled. Here is the result of their wobble: 105458787Sru# 105558787Sru# The following businesses and organizations in Pangnirtung use Central Time: 105658787Sru# 105758787Sru# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 105858787Sru# Eastern Arctic National Parks, A & D Specialist 105958787Sru# 106058787Sru# The following businesses and organizations in Pangnirtung use Eastern Time: 106158787Sru# 106258787Sru# Hamlet office, All other businesses, Both schools, Airport operator 106358787Sru# 106458787Sru# This has made for an interesting situation there, which warranted the news. 106558787Sru# No one there that I spoke with seems concerned, or has plans to 106658787Sru# change the local methods of keeping time, as it evidently does not 106758787Sru# really interfere with any activities or make things difficult locally. 106858787Sru# They plan to celebrate New Year's turn-over twice, one hour apart, 106958787Sru# so it appears that the situation will last at least that long. 107058787Sru# The Nunavut Intergovernmental Affairs hopes that they will "come to 107158787Sru# their senses", but the locals evidently don't see any problem with 107258787Sru# the current state of affairs. 107358787Sru 107458787Sru# From Michaela Rodrigue, writing in the 107558787Sru# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 107658787Sru# Nunatsiaq News (1999-11-19)</a>: 107758787Sru# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 107858787Sru# central - or Nunavut time - for government offices, and eastern time 107958787Sru# for municipal offices and schools.... Igloolik [was similar but then] 108058787Sru# made the switch to central time on Saturday, Nov. 6. 108158787Sru 108267578Swollman# From Paul Eggert (2000-10-02): 108367578Swollman# Matthews and Vincent (1998) say the following, but we lack histories 108467578Swollman# for these potential new Zones. 108567578Swollman# 108667578Swollman# The Canadian Forces station at Alert uses Eastern Time while the 108767578Swollman# handful of residents at the Eureka weather station [in the Central 108867578Swollman# zone] skip daylight savings. Baffin Island, which is crossed by the 108967578Swollman# Central, Eastern and Atlantic Time zones only uses Eastern Time. 109067578Swollman# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 109167578Swollman# Central Time and Southampton Island [in the Central zone] is not 109267578Swollman# required to use daylight savings. 109367578Swollman 10942742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 109517200SwollmanRule NT_YK 1918 only - Apr 14 2:00 1:00 D 109617200SwollmanRule NT_YK 1918 only - Oct 27 2:00 0 S 109717200SwollmanRule NT_YK 1919 only - May 25 2:00 1:00 D 109817200SwollmanRule NT_YK 1919 only - Nov 1 0:00 0 S 109917200SwollmanRule NT_YK 1942 only - Feb 9 2:00 1:00 D 110017200SwollmanRule NT_YK 1945 only - Sep 30 2:00 0 S 110117200SwollmanRule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 110217200SwollmanRule NT_YK 1965 only - Oct lastSun 2:00 0 S 110317200SwollmanRule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 110417200SwollmanRule NT_YK 1980 max - Oct lastSun 2:00 0 S 110517200SwollmanRule NT_YK 1987 max - Apr Sun>=1 2:00 1:00 D 11062742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 110717200SwollmanZone America/Pangnirtung -4:22:56 - LMT 1884 110858787Sru -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 110958787Sru -5:00 Canada E%sT 1999 Oct 31 2:00 111058787Sru -6:00 Canada C%sT 111158787SruZone America/Iqaluit -4:33:52 - LMT 1884 # Frobisher Bay before 1987 111258787Sru -5:00 NT_YK E%sT 1999 Oct 31 2:00 111358787Sru -6:00 Canada C%sT 111417200SwollmanZone America/Rankin_Inlet -6:08:40 - LMT 1884 111517200Swollman -6:00 NT_YK C%sT 111658787SruZone America/Cambridge_Bay -7:00:20 - LMT 1884 111758787Sru -7:00 NT_YK M%sT 1999 Oct 31 2:00 111858787Sru -6:00 Canada C%sT 111917200SwollmanZone America/Yellowknife -7:37:24 - LMT 1884 112017200Swollman -7:00 NT_YK M%sT 112117200SwollmanZone America/Inuvik -8:54:00 - LMT 1884 112217200Swollman -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 112317200Swollman -7:00 NT_YK M%sT 11242742SwollmanZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 112517200Swollman -9:00 NT_YK Y%sT 1966 Jul 1 2:00 112617200Swollman -8:00 NT_YK P%sT 112717200SwollmanZone America/Dawson -9:17:40 - LMT 1900 Aug 20 112820094Swollman -9:00 NT_YK Y%sT 1973 Oct 28 0:00 112917200Swollman -8:00 NT_YK P%sT 11302742Swollman 11318029Swollman 11322742Swollman############################################################################### 11332742Swollman 11342742Swollman# Mexico 11352742Swollman 113664499Swollman# Gwillim Law reports this source for daylight saving time in Mexico: 113764499Swollman# <a href="http://www.spin.com.mx/verano/"> 113864499Swollman# Daylight saving time * SPIN-Internet (in Spanish) 113964499Swollman# </a> 114064499Swollman# Law (2000-03-09) translates it as follows: 11412742Swollman# 114264499Swollman# Standard time effective in Mexico takes its origin in the 114364499Swollman# presidential decree of April 24, 1942. The time of the 120th 114464499Swollman# meridian applies to the state of Baja California; of the 105th 114564499Swollman# meridian to the states of Baja California Sur, Sonora, Sinaloa, and 114664499Swollman# Nayarit; and the time of the 90th meridian to the rest of the 114764499Swollman# country. 11482742Swollman# 114964499Swollman# In the country, there have been several attempts made to adapt 115064499Swollman# standard time with the object of arriving at a better use of 115164499Swollman# daylight for social and economic activities. In December, 1981 a 115264499Swollman# permanent time zone was decreed for the states of Campeche, Yucatan, 115364499Swollman# and Quintana Roo, displacing them from the 90th to the 75th 115464499Swollman# meridian. This disposition was annulled on December 2, 1982. 115564499Swollman# 115664499Swollman# In 1988 a Summer Time was established for the states of Tamaulipas, 115764499Swollman# Nuevo Leon, Coahuila, and Durango, which meant that from the first 115864499Swollman# Sunday in April to the last [Sunday] of October those states 115964499Swollman# displaced their time from the 90th to the 75th meridian. That 116064499Swollman# disposition lasted for one year. 11612742Swollman 116264499Swollman# From Paul Eggert (2000-07-26): 116364499Swollman# Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981 116464499Swollman# and 1988 DST experiments. Go with spin.com.mx. 11652742Swollman 116617200Swollman# From Alan Perry <alan.perry@eng.sun.com> (1996-02-15): 116717200Swollman# A guy from our Mexico subsidiary finally found the Presidential Decree 116817200Swollman# outlining the timezone changes in Mexico. 116958787Sru# 117017200Swollman# ------------- Begin Forwarded Message ------------- 117158787Sru# 117217200Swollman# I finally got my hands on the Official Presidential Decree that sets up the 117317200Swollman# rules for the DST changes. The rules are: 117458787Sru# 117517200Swollman# 1. The country is divided in 3 timezones: 117617200Swollman# - Baja California Norte (the Mexico/BajaNorte TZ) 117717200Swollman# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 117817200Swollman# - The rest of the country (the Mexico/General TZ) 117958787Sru# 118017200Swollman# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 118117200Swollman# at 2:00 AM, the times in each zone are as follows: 118217200Swollman# BajaNorte: GMT+7 118317200Swollman# BajaSur: GMT+6 118417200Swollman# General: GMT+5 118558787Sru# 118617200Swollman# 3. The rest of the year, the times are as follows: 118717200Swollman# BajaNorte: GMT+8 118817200Swollman# BajaSur: GMT+7 118917200Swollman# General: GMT+6 119058787Sru# 119117200Swollman# The Decree was published in Mexico's Official Newspaper on January 4th. 119258787Sru# 119317200Swollman# -------------- End Forwarded Message -------------- 119417200Swollman# From Paul Eggert (1996-06-12): 119543014Swollman# For an English translation of the decree, see 119643014Swollman# <a href="http://mexico-travel.com/extra/timezone_eng.html"> 119743014Swollman# ``Diario Oficial: Time Zone Changeover'' (1996-01-04). 119843014Swollman# </a> 119914343Swollman 120043543Swollman# From Rives McDow (1998-10-08): 120143543Swollman# The State of Quintana Roo has reverted back to central STD and DST times 120243543Swollman# (i.e. UTC -0600 and -0500 as of 1998-08-02). 120343543Swollman 120458787Sru# From Rives McDow (2000-01-10): 120558787Sru# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 120658787Sru# zone 5 hours from the International Date Line, and will not observe daylight 120758787Sru# savings time so as to stay on the same time zone as the southern part of 120858787Sru# Arizona year round. 120958787Sru 12102742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 12112742SwollmanRule Mexico 1939 only - Feb 5 0:00 1:00 D 12122742SwollmanRule Mexico 1939 only - Jun 25 0:00 0 S 12132742SwollmanRule Mexico 1940 only - Dec 9 0:00 1:00 D 12142742SwollmanRule Mexico 1941 only - Apr 1 0:00 0 S 12152742SwollmanRule Mexico 1943 only - Dec 16 0:00 1:00 D 12162742SwollmanRule Mexico 1944 only - May 1 0:00 0 S 12172742SwollmanRule Mexico 1950 only - Feb 12 0:00 1:00 D 12182742SwollmanRule Mexico 1950 only - Jul 30 0:00 0 S 121914343SwollmanRule Mexico 1996 max - Apr Sun>=1 2:00 1:00 D 122014343SwollmanRule Mexico 1996 max - Oct lastSun 2:00 0 S 122114343Swollman# 122258787SruRule BajaN 1954 1961 - Apr lastSun 2:00 1:00 D 122358787SruRule BajaN 1954 1961 - Sep lastSun 2:00 0 S 12242742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 122543014Swollman# Quintana Roo 122658787SruZone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 122764499Swollman -6:00 - CST 1981 Dec 122864499Swollman -5:00 - EST 1982 Dec 2 122943014Swollman -6:00 - CST 1996 123043014Swollman -6:00 Mexico C%sT 1997 Oct lastSun 2:00 123143543Swollman -5:00 Mexico E%sT 1998 Aug 2 2:00 123243543Swollman -6:00 Mexico C%sT 123364499Swollman# Campeche, Yucatan 123464499SwollmanZone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 123564499Swollman -6:00 - CST 1981 Dec 123664499Swollman -5:00 - EST 1982 Dec 2 123764499Swollman -6:00 Mexico C%sT 123864499Swollman# Coahuila, Durango, Nuevo Leon, Tamaulipas 123964499SwollmanZone America/Monterrey -6:41:16 - LMT 1922 Jan 1 0:01:32 124064499Swollman -6:00 - CST 1988 124164499Swollman -6:00 US C%sT 1989 124264499Swollman -6:00 Mexico C%sT 124343014Swollman# Central Mexico 12442742SwollmanZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 12452742Swollman -7:00 - MST 1927 Jun 10 23:00 12462742Swollman -6:00 - CST 1930 Nov 15 12472742Swollman -7:00 - MST 1931 May 1 23:00 12482742Swollman -6:00 - CST 1931 Oct 12492742Swollman -7:00 - MST 1932 Mar 30 23:00 12502742Swollman -6:00 Mexico C%sT 125143014Swollman# Chihuahua 125258787SruZone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 125343014Swollman -7:00 - MST 1927 Jun 10 23:00 125443014Swollman -6:00 - CST 1930 Nov 15 125543014Swollman -7:00 - MST 1931 May 1 23:00 125643014Swollman -6:00 - CST 1931 Oct 125743014Swollman -7:00 - MST 1932 Mar 30 23:00 125843014Swollman -6:00 - CST 1996 125943014Swollman -6:00 Mexico C%sT 1998 126043014Swollman -6:00 - CST 1998 Apr Sun>=1 3:00 126143014Swollman -7:00 Mexico M%sT 126258787Sru# Sonora 126358787SruZone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 126458787Sru -7:00 - MST 1927 Jun 10 23:00 126558787Sru -6:00 - CST 1930 Nov 15 126658787Sru -7:00 - MST 1931 May 1 23:00 126758787Sru -6:00 - CST 1931 Oct 126858787Sru -7:00 - MST 1932 Mar 30 23:00 126964499Swollman -6:00 - CST 1942 Apr 24 127058787Sru -7:00 - MST 1949 Jan 14 127158787Sru -8:00 - PST 1970 127258787Sru -7:00 Mexico M%sT 1999 127358787Sru -7:00 - MST 127464499Swollman# Baja California Sur, Nayarit, Sinaloa 12752742SwollmanZone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 12762742Swollman -7:00 - MST 1927 Jun 10 23:00 12772742Swollman -6:00 - CST 1930 Nov 15 12782742Swollman -7:00 - MST 1931 May 1 23:00 12792742Swollman -6:00 - CST 1931 Oct 12802742Swollman -7:00 - MST 1932 Mar 30 23:00 128164499Swollman -6:00 - CST 1942 Apr 24 12822742Swollman -7:00 - MST 1949 Jan 14 12832742Swollman -8:00 - PST 1970 128414343Swollman -7:00 Mexico M%sT 128558787Sru# Baja California 12862742SwollmanZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 12872742Swollman -8:00 - PST 1927 Jun 10 23:00 12882742Swollman -7:00 - MST 1930 Nov 16 128964499Swollman -8:00 - PST 1942 Apr 24 12902742Swollman -7:00 - MST 1949 Jan 14 129158787Sru -8:00 BajaN P%sT 1976 129214343Swollman -8:00 US P%sT 1996 129314343Swollman -8:00 Mexico P%sT 12942742Swollman# 12952742Swollman# Revillagigedo Is 12962742Swollman# no information 12972742Swollman 12982742Swollman############################################################################### 12992742Swollman 13002742Swollman# Anguilla 13012742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 13022742SwollmanZone America/Anguilla -4:12:16 - LMT 1912 Mar 2 13032742Swollman -4:00 - AST 13042742Swollman 13052742Swollman# Antigua and Barbuda 13062742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 13072742SwollmanZone America/Antigua -4:07:12 - LMT 1912 Mar 2 13082742Swollman -5:00 - EST 1951 13092742Swollman -4:00 - AST 13102742Swollman 13112742Swollman# Bahamas 13122742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 13132742SwollmanRule Bahamas 1964 max - Oct lastSun 2:00 0 S 13142742SwollmanRule Bahamas 1964 1986 - Apr lastSun 2:00 1:00 D 13152742SwollmanRule Bahamas 1987 max - Apr Sun>=1 2:00 1:00 D 13162742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 13172742SwollmanZone America/Nassau -5:09:24 - LMT 1912 Mar 2 13182742Swollman -5:00 Bahamas E%sT 13192742Swollman 13202742Swollman# Barbados 13212742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 13222742SwollmanRule Barb 1977 only - Jun 12 2:00 1:00 D 13232742SwollmanRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 13242742SwollmanRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 13252742SwollmanRule Barb 1979 only - Sep 30 2:00 0 S 13262742SwollmanRule Barb 1980 only - Sep 25 2:00 0 S 13272742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 13282742SwollmanZone America/Barbados -3:58:28 - LMT 1924 # Bridgetown 132943014Swollman -3:58:28 - BMT 1932 # Bridgetown Mean Time 13302742Swollman -4:00 Barb A%sT 13312742Swollman 13322742Swollman# Belize 13332742Swollman# Whitman entirely disagrees with Shanks; go with Shanks. 13342742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 13352742SwollmanRule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 13362742SwollmanRule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 13372742SwollmanRule Belize 1973 only - Dec 5 0:00 1:00 D 13382742SwollmanRule Belize 1974 only - Feb 9 0:00 0 S 13392742SwollmanRule Belize 1982 only - Dec 18 0:00 1:00 D 13402742SwollmanRule Belize 1983 only - Feb 12 0:00 0 S 13412742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 13422742SwollmanZone America/Belize -5:52:48 - LMT 1912 Apr 13432742Swollman -6:00 Belize C%sT 13442742Swollman 13452742Swollman# Bermuda 13462742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 13472742SwollmanZone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton 13482742Swollman -4:00 - AST 1974 Apr 28 2:00 13492742Swollman -4:00 Bahamas A%sT 13502742Swollman 13512742Swollman# Cayman Is 13522742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 13532742SwollmanZone America/Cayman -5:25:32 - LMT 1890 # Georgetown 135443014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 13552742Swollman -5:00 - EST 13562742Swollman 13572742Swollman# Costa Rica 13582742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 13592742SwollmanRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 13602742SwollmanRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 136120094SwollmanRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 136220094Swollman# IATA SSIM (1991-09) says the following was at 1:00; go with Shanks. 136320094SwollmanRule CR 1991 only - Jul 1 0:00 0 S 136420094SwollmanRule CR 1992 only - Mar 15 0:00 0 S 13652742Swollman# There are too many San Joses elsewhere, so we'll use `Costa Rica'. 13662742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 13672742SwollmanZone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose 136858787Sru -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time 13692742Swollman -6:00 CR C%sT 13702742Swollman# Coco 13712742Swollman# no information; probably like America/Costa_Rica 13722742Swollman 13732742Swollman# Cuba 13742742Swollman 137558787Sru# From Arthur David Olson (1999-03-29): 137658787Sru# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 137758787Sru# the Cuban National Team and the Baltimore Orioles was carried live on 137858787Sru# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 137958787Sru# During the game, play-by-play announcer Jim Hunter noted that 138058787Sru# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 138158787Sru# Time today." (The "two hour" remark referred to losing one hour of 138258787Sru# sleep on 1999-03-28--when the announcers were in Cuba as it switched 138358787Sru# to DST--and one more hour on 1999-04-04--when the announcers will have 138458787Sru# returned to Baltimore, which switches on that date.) 13852742Swollman 13862742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 13872742SwollmanRule Cuba 1928 only - Jun 10 0:00 1:00 D 13882742SwollmanRule Cuba 1928 only - Oct 10 0:00 0 S 13892742SwollmanRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 13902742SwollmanRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 13912742SwollmanRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 13922742SwollmanRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 13932742SwollmanRule Cuba 1965 only - Jun 1 0:00 1:00 D 13942742SwollmanRule Cuba 1965 only - Sep 30 0:00 0 S 13952742SwollmanRule Cuba 1966 only - May 29 0:00 1:00 D 13962742SwollmanRule Cuba 1966 only - Oct 2 0:00 0 S 13972742SwollmanRule Cuba 1967 only - Apr 8 0:00 1:00 D 13982742SwollmanRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 13992742SwollmanRule Cuba 1968 only - Apr 14 0:00 1:00 D 14002742SwollmanRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 14012742SwollmanRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 14022742SwollmanRule Cuba 1972 1974 - Oct 8 0:00 0 S 14032742SwollmanRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 14042742SwollmanRule Cuba 1978 only - May 7 0:00 1:00 D 140530711SwollmanRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 14062742SwollmanRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 14072742SwollmanRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 14082742SwollmanRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 140943014SwollmanRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 141020094SwollmanRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 141143014SwollmanRule Cuba 1996 only - Oct 6 0:00s 0 S 141243014SwollmanRule Cuba 1997 only - Oct 12 0:00s 0 S 141358787SruRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 141443014SwollmanRule Cuba 1998 max - Oct lastSun 0:00s 0 S 141558787SruRule Cuba 2000 max - Apr Sun>=1 0:00s 1:00 D 14162742Swollman 14172742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14182742SwollmanZone America/Havana -5:29:28 - LMT 1890 141958787Sru -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 14202742Swollman -5:00 Cuba C%sT 14212742Swollman 14222742Swollman# Dominica 14232742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14242742SwollmanZone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau 14252742Swollman -4:00 - AST 14262742Swollman 14272742Swollman# Dominican Republic 14282742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 14292742SwollmanRule DR 1966 only - Oct 30 0:00 1:00 D 14302742SwollmanRule DR 1967 only - Feb 28 0:00 0 S 14312742SwollmanRule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 14322742SwollmanRule DR 1970 only - Feb 21 0:00 0 S 14332742SwollmanRule DR 1971 only - Jan 20 0:00 0 S 14342742SwollmanRule DR 1972 1974 - Jan 21 0:00 0 S 14352742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14362742SwollmanZone America/Santo_Domingo -4:39:36 - LMT 1890 14372742Swollman -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 14382742Swollman -5:00 DR E%sT 1974 Oct 27 14392742Swollman -4:00 - AST 14402742Swollman 14412742Swollman# El Salvador 14422742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 14432742SwollmanRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 14442742SwollmanRule Salv 1987 1988 - Sep lastSun 0:00 0 S 14452742Swollman# There are too many San Salvadors elsewhere, so we'll use `El Salvador'. 14462742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14472742SwollmanZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 14482742Swollman -6:00 Salv C%sT 14492742Swollman 14502742Swollman# Grenada 14512742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 145219878SwollmanZone America/Grenada -4:07:00 - LMT 1911 Jul # St George's 14532742Swollman -4:00 - AST 14542742Swollman 14552742Swollman# Guadeloupe 14562742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14572742SwollmanZone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre 14582742Swollman -4:00 - AST 14592742Swollman 14602742Swollman# Guatemala 14612742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 14622742SwollmanRule Guat 1973 only - Nov 25 0:00 1:00 D 14632742SwollmanRule Guat 1974 only - Feb 24 0:00 0 S 14642742SwollmanRule Guat 1983 only - May 21 0:00 1:00 D 14652742SwollmanRule Guat 1983 only - Sep 22 0:00 0 S 146620094SwollmanRule Guat 1991 only - Mar 23 0:00 1:00 D 146720094SwollmanRule Guat 1991 only - Sep 7 0:00 0 S 14682742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14692742SwollmanZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 14702742Swollman -6:00 Guat C%sT 14712742Swollman 14722742Swollman# Haiti 14732742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 14742742SwollmanRule Haiti 1983 only - May 8 0:00 1:00 D 14752742SwollmanRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 14762742SwollmanRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 147758787Sru# Shanks says AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. Go with IATA. 147843014SwollmanRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 147943014SwollmanRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 14802742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14812742SwollmanZone America/Port-au-Prince -4:49:20 - LMT 1890 14822742Swollman -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 14832742Swollman -5:00 Haiti E%sT 14842742Swollman 14852742Swollman# Honduras 14862742Swollman# Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1. 14872742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14882742SwollmanZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 14892742Swollman -6:00 Salv C%sT 149043543Swollman# 149143543Swollman# Great Swan I ceded by US to Honduras in 1972 14922742Swollman 14932742Swollman# Jamaica 14942742Swollman 149519878Swollman# From Bob Devine (1988-01-28): 14962742Swollman# Follows US rules. 14972742Swollman 149819878Swollman# From U. S. Naval Observatory (1989-01-19): 14992742Swollman# JAMAICA 5 H BEHIND UTC 15002742Swollman 150158787Sru# From Shanks: 15022742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15032742SwollmanZone America/Jamaica -5:07:12 - LMT 1890 # Kingston 150443014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 150558787Sru -5:00 - EST 1974 Apr 28 2:00 150620094Swollman -5:00 US E%sT 1984 150720094Swollman -5:00 - EST 15082742Swollman 15092742Swollman# Martinique 15102742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15112742SwollmanZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 15122742Swollman -4:04 - FFMT 1911 May # Fort-de-France MT 15132742Swollman -4:00 - AST 1980 Apr 6 15142742Swollman -4:00 1:00 ADT 1980 Sep 28 15152742Swollman -4:00 - AST 15162742Swollman 15172742Swollman# Montserrat 151830711Swollman# From Paul Eggert (1997-08-31): 151930711Swollman# Recent volcanic eruptions have forced evacuation of Plymouth, the capital. 152030711Swollman# Luckily, Olveston, the current de facto capital, has the same longitude. 15212742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 152230711SwollmanZone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Olveston 15232742Swollman -4:00 - AST 15242742Swollman 15252742Swollman# Nicaragua 152643543Swollman# 152743543Swollman# From Steffen Thorsen (1998-12-29): 152843543Swollman# Nicaragua seems to be back at -6:00 but I have not been able to find when 152943543Swollman# they changed from -5:00. 153043543Swollman# 15312742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 15322742SwollmanRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 15332742SwollmanRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 153420094SwollmanRule Nic 1992 only - Jan 1 4:00 1:00 D 153520094SwollmanRule Nic 1992 only - Sep 24 0:00 0 S 15362742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15372742SwollmanZone America/Managua -5:45:08 - LMT 1890 15382742Swollman -5:45 - MMT 1934 Jun 23 # Managua Mean Time 15392742Swollman -6:00 - CST 1973 May 15402742Swollman -5:00 - EST 1975 Feb 16 154120094Swollman -6:00 Nic C%sT 1993 Jan 1 4:00 154243543Swollman -5:00 - EST 1998 Dec 154343543Swollman -6:00 - CST 15442742Swollman 15452742Swollman# Panama 15462742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15472742SwollmanZone America/Panama -5:18:08 - LMT 1890 15482742Swollman -5:20 - PMT 1908 Apr 22 # Panama Mean Time 15492742Swollman -5:00 - EST 15502742Swollman 15512742Swollman# Puerto Rico 15522742Swollman# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. 15532742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 155414343SwollmanZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 15552742Swollman -4:00 - AST 1942 May 3 155614343Swollman -4:00 1:00 AWT 1945 Sep 30 2:00 15572742Swollman -4:00 - AST 15582742Swollman 15592742Swollman# St Kitts-Nevis 15602742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15612742SwollmanZone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre 15622742Swollman -4:00 - AST 15632742Swollman 15642742Swollman# St Lucia 15652742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15662742SwollmanZone America/St_Lucia -4:04:00 - LMT 1890 # Castries 15672742Swollman -4:04 - CMT 1912 # Castries Mean Time 15682742Swollman -4:00 - AST 15692742Swollman 15702742Swollman# St Pierre and Miquelon 15712742Swollman# There are too many St Pierres elsewhere, so we'll use `Miquelon'. 15722742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15732742SwollmanZone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 15742742Swollman -4:00 - AST 1980 May 157519878Swollman -3:00 Mont PM%sT # Pierre & Miquelon Time 15762742Swollman 15772742Swollman# St Vincent and the Grenadines 15782742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15792742SwollmanZone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown 158043014Swollman -4:04:56 - KMT 1912 # Kingstown Mean Time 15812742Swollman -4:00 - AST 15822742Swollman 15832742Swollman# Turks and Caicos 158443014Swollman# From Paul Eggert (1998-08-06): 158543014Swollman# Shanks says they use US DST rules, but IATA SSIM (1991/1998) 158620094Swollman# says they switch at midnight. Go with IATA SSIM. 158720094Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 158820094SwollmanRule TC 1979 1986 - Apr lastSun 0:00 1:00 D 158920094SwollmanRule TC 1979 max - Oct lastSun 0:00 0 S 159020094SwollmanRule TC 1987 max - Apr Sun>=1 0:00 1:00 D 15912742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15922742SwollmanZone America/Grand_Turk -4:44:32 - LMT 1890 159343014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 159420094Swollman -5:00 TC E%sT 15958029Swollman 159614343Swollman# British Virgin Is 15972742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 159814343SwollmanZone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town 15992742Swollman -4:00 - AST 16008029Swollman 160114343Swollman# Virgin Is 160214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 160314343SwollmanZone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie 160414343Swollman -4:00 - AST 1605