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91 lines
3.0 KiB
Plaintext
91 lines
3.0 KiB
Plaintext
# %W%
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# Despite the performance of existing (4.[123]BSD, System V Release 2.0) code,
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# US Daylight Saving Time ended on the last Sunday of *October* in 1974.
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# See, for example, the front page of the Saturday, October 26, 1974
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# and Sunday, October 27, 1974 editions of the Washington Post.
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# Note also this from seismo!munnari!kre:
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# "I recall also being told by someone once that Canada didn't have
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# the DST variations in 74/75 that the US did, but I am not nearly
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# sure enough of this to add anything."
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# The above has been confirmed by Bob Devine; we'll go with it here.
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# Before the Uniform Time Act of 1966 took effect in 1967, observance of
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# Daylight Saving Time in the US was by local option, except during wartime.
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# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
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Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
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Rule US 1918 1919 - Oct lastSun 2:00 0 S
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Rule US 1942 only - Feb 9 2:00 1:00 W # War
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Rule US 1945 only - Sep 30 2:00 0 S
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Rule US 1967 max - Oct lastSun 2:00 0 S
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Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
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Rule US 1974 only - Jan 6 2:00 1:00 D
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Rule US 1975 only - Feb 23 2:00 1:00 D
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Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
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Rule US 1987 max - Apr Sun>=1 2:00 1:00 D
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###############################################################################
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# New names
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# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
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Zone US/Eastern -5:00 US E%sT
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Zone US/Central -6:00 US C%sT
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Zone US/Mountain -7:00 US M%sT
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Zone US/Pacific -8:00 US P%sT
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Zone US/Yukon -9:00 US Y%sT
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# Mainland US areas that are always Standard as of 1986.
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Zone US/East-Indiana -5:00 US E%sT 1946
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-5:00 - EST # Always EST as of 1986
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Zone US/Arizona -7:00 US M%sT 1946
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-7:00 - MST # Always MST as of 1986
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# And then there's Hawaii.
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# DST was observed for one day in 1933;
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# Standard time was change by half an hour in 1947;
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# It's always standard as of 1986.
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Zone US/Hawaii -10:30 US H%sT 1933 Apr 30 2:00
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-10:30 1:00 HDT 1933 May 1 2:00
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-10:30 US H%sT 1947 Jun 8 2:00
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-10:00 - HST
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# Old names, for S5 users
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# Link LINK-FROM LINK-TO
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Link US/Eastern EST5EDT
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Link US/Central CST6CDT
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Link US/Mountain MST7MDT
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Link US/Pacific PST8PDT
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Link US/East-Indiana EST
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Link US/Arizona MST
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Link US/Hawaii HST
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################################################################################
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# Canada is reportedly lots easier than the US--leastways since 1951.
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# I don't know what they did before then.
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# 4.3BSD claims that it's perfectly regular.
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# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
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Rule Canada 1967 max - Apr lastSun 2:00 1:00 D
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Rule Canada 1967 max - Oct lastSun 2:00 0 S
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# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
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# Bob Devine says that DST *is* observed in Newfoundland
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Zone Canada/Newfoundland -3:30 Canada N%sT
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Zone Canada/Atlantic -4:00 Canada A%sT
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Zone Canada/Eastern -5:00 Canada E%sT
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Zone Canada/Central -6:00 Canada C%sT
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Zone Canada/Mountain -7:00 Canada M%sT
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Zone Canada/Pacific -8:00 Canada P%sT
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Zone Canada/Yukon -9:00 Canada Y%sT
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################################################################################
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# ?Mexico? !Quien sabe!
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