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Diffstat (limited to 'share/zoneinfo/datfiles/northamerica')
| -rw-r--r-- | share/zoneinfo/datfiles/northamerica | 321 |
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diff --git a/share/zoneinfo/datfiles/northamerica b/share/zoneinfo/datfiles/northamerica new file mode 100644 index 0000000..53a1df1 --- /dev/null +++ b/share/zoneinfo/datfiles/northamerica @@ -0,0 +1,321 @@ +# @(#)northamerica 4.8 + +############################################################################### + +# United States + +# From Arthur David Olson: +# US Daylight Saving Time ended on the last Sunday of *October* in 1974. +# See, for example, the front page of the Saturday, October 26, 1974 +# and Sunday, October 27, 1974 editions of the Washington Post. + +# From seismo!munnari!kre: +# I recall also being told by someone once that Canada didn't have +# the DST variations in 74/75 that the US did, but I am not nearly +# sure enough of this to add anything. + +# From Arthur David Olson: +# The above has been confirmed by Bob Devine; we'll go with it here. + +# From Arthur David Olson: +# Before the Uniform Time Act of 1966 took effect in 1967, observance of +# Daylight Saving Time in the US was by local option, except during wartime. + +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S +Rule US 1918 1919 - Mar lastSun 2:00 1:00 D +Rule US 1918 1919 - Oct lastSun 2:00 0 S +Rule US 1942 only - Feb 9 2:00 1:00 W # War +Rule US 1945 only - Sep 30 2:00 0 S +Rule US 1967 max - Oct lastSun 2:00 0 S +Rule US 1967 1973 - Apr lastSun 2:00 1:00 D +Rule US 1974 only - Jan 6 2:00 1:00 D +Rule US 1975 only - Feb 23 2:00 1:00 D +Rule US 1976 1986 - Apr lastSun 2:00 1:00 D +Rule US 1987 max - Apr Sun>=1 2:00 1:00 D + +# From Bob Devine (January 28, 1988): +# ...Alaska (and Hawaii) had the timezone names changed in 1967. +# old new +# Pacific Standard Time(PST) -same- +# Yukon Standard Time(YST) -same- +# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) +# Nome Standard Time (NT) Bering Standard Time (BST) +# +# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. +# The YST zone now covers nearly all of the state, AHST just part +# of the Aleutian islands. No DST. + +# From U. S. Naval Observatory (January 19, 1989): +# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON +# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 +# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON +# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 +# USA MOUNTAIN 7 H BEHIND UTC DENVER +# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 +# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO +# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 +# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) +# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) +# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W +# USA - " - 9 H BEHIND UTC APR 3 - OCT 30 +# USA HAWAII 10 H BEHIND UTC +# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY + +# From Arthur David Olson (January 21, 1989): +# The above dates are for 1988. +# Note the "AKST" and "AKDT" abbreviations, the claim that there's +# no DST in Samoa, and the claim that there is DST in Alaska and the +# Aleutians. + +# From Arthur David Olson (February 13, 1988): +# Legal standard time zone names, from United States Code (1982 Edition and +# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names +# up to April 1, 1967 (when most provisions of the Uniform Time Act of 1966 +# took effect), as explained in sections 263 and 261: +# (none) +# United States standard eastern time +# United States standard mountain time +# United States standard central time +# United States standard Pacific time +# (none) +# United States standard Alaska time +# (none) +# Next, names from April 1, 1967 until November 30, 1983 (the date for +# public law 98-181): +# Atlantic standard time +# eastern standard time +# central standard time +# mountain standard time +# Pacific standard time +# Yukon standard time +# Alaska-Hawaii standard time +# Bering standard time +# And after November 30, 1983: +# Atlantic standard time +# eastern standard time +# central standard time +# mountain standard time +# Pacific standard time +# Alaska standard time +# Hawaii-Aleutian standard time +# Samoa standard time +# The law doesn't give abbreviations. + +# Easy stuff first--including Alaska, where we ignore history (since we +# can't tell if we should give Yukon time or Alaska-Hawaii time for "old" +# times). + +# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL] +Zone US/Eastern -5:00 US E%sT +Zone US/Central -6:00 US C%sT +Zone US/Mountain -7:00 US M%sT +Zone US/Pacific -8:00 US P%sT +Zone US/Alaska -9:00 US AK%sT # Abbreviation per USNO + +# Mainland US areas that are always Standard as of 1986. + +Zone US/East-Indiana -5:00 US E%sT 1946 + -5:00 - EST # Always EST as of 1986 +Zone US/Arizona -7:00 US M%sT 1946 + -7:00 - MST # Always MST as of 1986 + +# From Arthur David Olson (February 13, 1988): +# However. . .a writer from the Inter Tribal Council of Arizona, Inc., +# notes in private correspondence dated 12/28/87 that "Presently, only the +# Navajo Nation participates in the Daylight Saving Time policy, due to its +# large size and location in three states." (The "only" means that other +# tribal nations don't use DST.) + +Link US/Mountain Navajo + +# From Bob Devine (January 28, 1988): +# Michigan didn't observe DST from 1968 to 1973. + +Zone US/Michigan -5:00 US E%sT 1968 + -5:00 - EST 1973 + -5:00 US E%sT + +# Samoa just changes names. No DST, per Naval Observatory. + +Zone US/Samoa -11:00 - NST 1967 Apr 1 # N=Nome + -11:00 - BST 1983 Nov 30 # B=Bering + -11:00 - SST # S=Samoa + +# Aleutian has a name change. DST, per Naval Observatory. + +Zone US/Aleutian -10:00 US AH%sT 1983 Nov 30 + -10:00 US HA%sT + +# From Arthur David Olson: +# And then there's Hawaii. +# DST was observed for one day in 1933; +# Standard time was change by half an hour in 1947; +# it's always standard as of 1986. + +Zone US/Hawaii -10:30 US H%sT 1933 Apr 30 2:00 + -10:30 1:00 HDT 1933 May 1 2:00 + -10:30 US H%sT 1947 Jun 8 2:00 + -10:00 - HST + +# Old names, for S5 users + +# Link LINK-FROM LINK-TO +# Link US/Eastern EST5EDT +# Link US/Central CST6CDT +# Link US/Mountain MST7MDT +# Link US/Pacific PST8PDT +# Link US/East-Indiana EST +# Link US/Arizona MST +# Link US/Hawaii HST + +################################################################################ + +# Canada + +# Canada is reportedly lots easier than the US--leastways since 1951. +# I don't know what they did before then. +# 4.3BSD claims that it's perfectly regular. +# According to a posting in "comp.bugs.misc", "comp.unix.wizards", etc. +# on February 8, 1987, by Dave Sherman of the Law Society of Upper Canada, +# "...Canada (well, Ontario and at least some of the other provinces) are +# adopting the new daylight savings time rules...". We assume all of +# Canada is doing so. + +# From Bob Devine (January 28, 1988): +# All of Canada did have DST from your first rule except Saskatchewan. +# Which parts did not observe DST is hard to pinpoint but most of the +# province follows the rules. +# NOTE: those that didn't have DST for that rule, also +# probably did not have it for several years previous. + +# From U. S. Naval Observatory (January 19, 1989): +# CANADA NEW FDL 3.5H BEHIND UTC ST.JOHN'S +# CANADA NEW FDL 1.5H BEHIND UTC APR 3 - OCT 29 +# CANADA ATLANTIC 4 H BEHIND UTC HALIFAX +# CANADA ATLANTIC 3 H BEHIND UTC APR 3 - OCT 29 +# CANADA EASTERN 5 H BEHIND UTC TORONTO, MONTREAL, OTTAWA +# CANADA EASTERN 4 H BEHIND UTC APR 3 - OCT 29 +# CANADA CENTRAL 6 H BEHIND UTC REGINA, WINNIPEG +# CANADA CENTRAL 5 H BEHIND UTC APR 3 - OCT 29 +# CANADA MOUNTAIN 7 H BEHIND UTC CALGARY, EDMONTON +# CANADA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 29 +# CANADA PACIFIC 8 H BEHIND UTC VANCOUVER +# CANADA PACIFIC 7 H BEHIND UTC APR 3 - OCT 29 +# CANADA YUKON SAME AS PACIFIC DAWSON + +# From Arthur David Olson (January 21, 1989): +# April 3 fell on a Sunday in 1988; October 29 fell on a Sunday in 1989. Ahem. +# Note claim that there's double DST in Newfoundland and that Yukon should +# be same as Pacific. Stick with rules posted in 1988 until more authoritative +# information is available. + +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S +Rule Canada 1969 max - Oct lastSun 2:00 0 S +Rule Canada 1969 1986 - Apr lastSun 2:00 1:00 D +Rule Canada 1987 max - Apr Sun>=1 2:00 1:00 D + +# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL] +# Bob Devine says that DST *is* observed in Newfoundland +Zone Canada/Newfoundland -3:30 Canada N%sT +Zone Canada/Atlantic -4:00 Canada A%sT +Zone Canada/Eastern -5:00 Canada E%sT +Zone Canada/Central -6:00 Canada C%sT +Zone Canada/East-Saskatchewan -6:00 - CST # No DST as of 1987 +Zone Canada/Mountain -7:00 Canada M%sT +Zone Canada/Pacific -8:00 Canada P%sT +Zone Canada/Yukon -9:00 Canada Y%sT + +############################################################################### + +# Mexico + +# From Guy Harris: +# Rules are from the Official Airline Guide, Worldwide Edition, for 1987. +# Rules prior to 1987 are unknown. +# The comments in the OAG say "Only Ensenada, Mexicale, San Felipe and Tijuana +# observe DST." This is presumably Baja California Norte, above 28th parallel, +# as listed there; Mexico/BajaSur is for "Baja California Sur and N. Pacific +# Coast (States of Sinaloa and Sonora)." + +# From Bob Devine (January 28, 1988): +# The Federal District (where Mexico City is) has observed [DST] several +# times but not recently. +# +# I don't where to drawn the line in the North Baja area. 28th latitude +# sounds good -- but it may be higher (how far [d]o radio stations from +# San Diego affect culture?). +# +# The dates of DST probably go back to 1981. The rules are the same as +# US's. This is going to be a headache for US presidential electi[o]n years! + +# From Arthur David Olson (February 13, 1988) +# Since the 1981 starting date is only "probable," we'll keep the 1987 +# starting date below. + +# From U. S. Naval Observatory (January 19, 1989): +# MEXICO BAJA CAL N 7 H BEHIND UTC BAJA CALIFORNIA SUR AND +# MEXICO BAJA CAL N N. PACIFIC COAST (STATES +# MEXICO BAJA CAL N OF SINALOA AND SONORA) +# MEXICO BAJA CAL N 8 H BEHIND UTC ABOVE 28TH PARALLAL APR 3 +# MEXICO BAJA CAL N - OCT 29 +# MEXICO BAJA CAL N 7 H BEHIND UTC ABOVE 28TH PARALLAL APR 3 +# MEXICO BAJA CAL N - 0CT 29 +# MEXICO 6 H BEHIND UTC STATES OF DURANGO, +# MEXICO COAHUILA, NUEVO LEON, +# MEXICO TAMAULIPAS +# MEXICO 5 H BEHIND UTC STATES OF DURANGO, +# MEXICO COAHUILA, NUEVO LEON, +# MEXICO TAMAULIPAS APR 3 - OCT 29 +# MEXICO 6 H BEHIND UTC GENERAL MEXICO, STATES OF +# MEXICO CAMPECHE, QUINTANA ROO AND +# MEXICO YUCATAN + +# From Arthur David Olson (January 21, 1989): +# April 3 fell on a Sunday in 1988; October 29 fell on a Sunday in 1989. Ahem. +# USNO claims there should be four Mexican zones rather than three: +# a zone that's GMT-8 with DST; a zone that's always GMT-7; +# a zone that's GMT-6 with DST; and a zone that's always GMT-6. +# Wait for more authoritative information before changing. + +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S +Rule Mexico 1987 max - Oct lastSun 2:00 0 S +Rule Mexico 1987 max - Apr Sun>=1 2:00 1:00 D + +# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL] +Zone Mexico/BajaNorte -8:00 Mexico P%sT +Zone Mexico/BajaSur -7:00 - MST +Zone Mexico/General -6:00 - CST + +############################################################################### + +# Jamaica + +# From Bob Devine (January 28, 1988): +# Follows US rules. + +# From U. S. Naval Observatory (January 19, 1989): +# JAMAICA 5 H BEHIND UTC + +Link US/Eastern Jamaica + +############################################################################### + +# Cuba + +# From Bob Devine (January 28, 1988): +# . . .DST is from 2nd Sunday in May to 2nd Sunday in October since 1981. +# Change at midnight. In 1979 & 1980, started at 3rd Sunday in March +# (I think). + +# From U. S. Naval Observatory (January 19, 1989): +# CUBA 5 H BEHIND UTC +# CUBA 4 H BEHIND UTC MAR 20 - OCT 8 + +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S +Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D +Rule Cuba 1979 1980 - Oct Sun>=8 0:00 0 S +Rule Cuba 1981 max - May Sun>=8 0:00 1:00 D +Rule Cuba 1981 max - Oct Sun>=8 0:00 0 S + +# Zone NAME GMTOFF RULES/SAVE FORMAT +Zone Cuba -5:00 Cuba C%sT |
