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Newsgroups: mod.sources
Subject: v06i070: Updates to "settz" data files (settz.patch)
Message-ID: <158@mirror.UUCP>
Date: Tue, 22-Jul-86 12:40:11 EDT
Article-I.D.: mirror.158
Posted: Tue Jul 22 12:40:11 1986
Date-Received: Wed, 23-Jul-86 05:49:02 EDT
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Submitted by: seismo!elsie!ado
Mod.sources: Volume 6, Issue 70
Archive-name: settz.patch
[ Volume 4 #14 is "settz," a program that generates datafiles with
detailed timezone information. With the recent change in US law,
this topic has been under renewed discussion, especially in
net.unix-wizards and mod.std.unix. If you missed the original
settz posting, please contact your nearest mod.sources archive
site. --r$]
: To unbundle, sh this file
echo EXPLANATION 1>&2
cat >EXPLANATION <<'End of EXPLANATION'
On July 8, Ronald Reagan signed a bill changing the United States' Daylight
Saving Time law.
Starting in 1987, US Daylight Saving is to be observed from the *first* Sunday
in April until the last Sunday in October. (Under recent law, it has been
observed from the *last* Sunday in April until the last Sunday in October.)
Here are updated versions of two data files that were part of the recently
posted time zone package.
--
Time is a Time Incorporated trademark.
--
UUCP: ..decvax!seismo!elsie!ado ARPA: elsie!...@seismo.ARPA
DEC, VAX, Elsie & Ado are Digital, Borden & Ampex trademarks.
End of EXPLANATION
echo northamerica 1>&2
cat >northamerica <<'End of northamerica'
# @(#)northamerica 2.2
# Bob Devine has written that ". . .your table is wrong for MostNA in 1974.
# The correct ending date is 10/27 not 11/24." Yet on a 4.1bsd VAX/11-750
# system, compiling and executing the program
#
# #include "time.h"
#
# long l = 152592000;
#
# main() {
# struct tm * tmp;
#
# tmp = localtime(&l);
# printf("%s", asctime(tmp));
# printf("isdst: %d\n", tmp->tm_isdst);
# }
#
# results in the output
#
# Fri Nov 1 22:40:00 1974
# isdst: 1
#
# For now we'll stay with 4.1bsd's version.
#
# Note also this from 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."
# If Canada or Mexico decide not to follow the US change in DST that takes
# effect in 1987, additions had best be made below.
# 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 MostNA 1918 1919 - Mar lastSun 2:00 1:00 D
Rule MostNA 1918 1919 - Oct lastSun 2:00 0 S
Rule MostNA 1942 only - Feb 9 2:00 1:00 W # War
Rule MostNA 1945 only - Sep 30 2:00 0 S
Rule MostNA 1967 1973 - Apr lastSun 2:00 1:00 D
Rule MostNA 1967 1973 - Oct lastSun 2:00 0 S
Rule MostNA 1974 only - Jan 6 2:00 1:00 D
Rule MostNA 1974 only - Nov 24 2:00 0 S
Rule MostNA 1975 only - Feb 23 2:00 1:00 D
Rule MostNA 1975 only - Oct 26 2:00 0 S
Rule MostNA 1976 1986 - Apr lastSun 2:00 1:00 D
Rule MostNA 1976 1986 - Oct lastSun 2:00 0 S
Rule MostNA 1987 2037 - Apr Sun>=1 2:00 1:00 D
Rule MostNA 1987 2037 - Oct lastSun 2:00 0 S
###############################################################################
# New names
# Zone NAME GMTOFF RULES FORMAT
Zone Atlantic -4:00 MostNA A%sT
Zone Eastern -5:00 MostNA E%sT
Zone Central -6:00 MostNA C%sT
Zone Mountain -7:00 MostNA M%sT
Zone Pacific -8:00 MostNA P%sT
Zone Yukon -9:00 MostNA Y%sT
Zone Aleutian -10:00 MostNA A%sT
Zone Newfoundland -3:30 - NST # Is DST now observed here?
# If so, when did it start?
# Old names
# Link LINK-FROM LINK-TO
Link Eastern EST5EDT
Link Central CST6CDT
Link Mountain MST7MDT
Link Pacific PST8PDT
# Nonstandard mainland areas:
Rule SomeUS 1918 1919 - Mar lastSun 2:00 1:00 D
Rule SomeUS 1918 1919 - Oct lastSun 2:00 0 S
Rule SomeUS 1942 only - Feb 9 2:00 1:00 W # War
Rule SomeUS 1945 only - Sep 30 2:00 0 S
Zone East-Indiana -5:00 SomeUS E%sT # Usually standard near South Bend
Zone Arizona -7:00 SomeUS M%sT # Usually standard in Arizona
# And then there's Hawaii.
# DST was observed for one day in 1933.
# Standard time was change by half an hour in 1947; this accounts for
# the half-hour offsets before then, and the peculiar first rule.
# (An alternative is to have "Zone Hawaiian -10:30..." with a
# current standard offset of 0:30; this seems a bit more obscure.)
#
# Things have been calm since 1947.
Rule Hawaii 1901 only - Dec 14 0:00 -0:30 S
Rule Hawaii 1918 1919 - Mar lastSun 2:00 0:30 D
Rule Hawaii 1918 1919 - Oct lastSun 2:00 -0:30 S
Rule Hawaii 1933 only - Apr 30 2:00 0:30 D
Rule Hawaii 1933 only - May 1 2:00 -0:30 S
Rule Hawaii 1942 only - Feb 9 2:00 0:30 W # War
Rule Hawaii 1945 only - Sep 30 2:00 -0:30 S
Rule Hawaii 1947 only - Jun 8 2:00 0 S
Zone Hawaiian -10:00 Hawaii H%sT
End of northamerica
echo pacificnew 1>&2
cat >pacificnew <<'End of pacificnew'
# @(#)pacificnew 2.2
# "Pacific Presidential Election Time" has been contemplated by the US Congress
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Twilite 1918 1919 - Mar lastSun 2:00 1:00 D
Rule Twilite 1918 1919 - Oct lastSun 2:00 0 S
Rule Twilite 1942 only - Feb 9 2:00 1:00 W # War
Rule Twilite 1945 only - Sep 30 2:00 0 S
Rule Twilite 1967 1973 - Apr lastSun 2:00 1:00 D
Rule Twilite 1967 1973 - Oct lastSun 2:00 0 S
Rule Twilite 1974 only - Jan 6 2:00 1:00 D
Rule Twilite 1974 only - Nov 24 2:00 0 S
Rule Twilite 1975 only - Feb 23 2:00 1:00 D
Rule Twilite 1975 only - Oct 26 2:00 0 S
Rule Twilite 1976 1986 - Apr lastSun 2:00 1:00 D
Rule Twilite 1976 1986 - Oct lastSun 2:00 0 S
Rule Twilite 1987 2037 - Apr Sun>=1 2:00 1:00 D
Rule Twilite 1987 2037 uspres Oct lastSun 2:00 1:00 PE
Rule Twilite 1987 2037 uspres Nov Sun>=7 2:00 0 S
Rule Twilite 1987 2037 nonpres Oct lastSun 2:00 0 S
# Zone NAME GMTOFF RULES FORMAT
Zone Pacific-New -8:00 Twilite P%sT
End of pacificnew
exit