Help wanted in updating time zone information files
Arthur David Olson
ado
Sat Jan 2 21:35:36 UTC 1988
I'm hoping to send some updated time zone information files to
comp.sources.unix soon (as soon as I can learn the equation of time for 1988
and, with that information, do up the 1988 Riyadh table). I've attached a
bundle of the new files that would be used in making the posting; I'd
appreciate any corrections or additional information that folks might
provide.
Here's a summary of the changes these files reflect. Thanks to Guy Harris
for providing the vast majority of the changes.
* The "northamerica" file has information about Mexico and about DST
being observed on Navajo lands within Arizona.
* The "pacificnew" file has information on the status of H.R. 435
(the bill whose passage would necessitate use of the "pacificnew"
stuff).
* The "southamerica" file is completely new.
* The "asia" file is almost completely new; it now covers both Chinas
and the Republic of Korea.
--ado
: To unbundle, sh this file
echo 'northamerica' 1>&2
cat >'northamerica' <<'End of northamerica'
# @(#)northamerica 3.4
# 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.
# Note also this 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."
# The above has been confirmed by Bob Devine; we'll go with it here.
# 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
###############################################################################
# New names
# 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/Yukon -9:00 US Y%sT
# 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
# 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."
Link US/Mountain Navajo
# 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 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.
# 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
# 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)."
# 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
End of northamerica
echo 'pacificnew' 1>&2
cat >'pacificnew' <<'End of pacificnew'
# @(#)pacificnew 3.4
# The U.S. House of Representatives passed a bill (H.R. 435) establishing
# "Pacific Presidential Election Time" on November 10, 1987;
# it has yet (as of January 2, 1988) been approved by the U.S. Senate
# or signed into law by the U.S. President.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Twilite 1987 max - Apr Sun>=1 2:00 1:00 D
Rule Twilite 1987 max uspres Oct lastSun 2:00 1:00 PE
Rule Twilite 1987 max uspres Nov Sun>=7 2:00 0 S
Rule Twilite 1987 max nonpres Oct lastSun 2:00 0 S
# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
Zone US/Pacific-New -8:00 US P%sT 1987
-8:00 Twilite P%sT
End of pacificnew
echo 'southamerica' 1>&2
cat >'southamerica' <<'End of southamerica'
# @(#)southamerica 1.1
# From Official Airline Guide - Worldwide Edition (1987). Countries not
# listed here do not observe DST, according to the OAG. Time zone names
# are pure inventions, and none are supplied for countries not observing
# DST; updates from natives would be appreciated. The times that DST
# starts and ends are based on the assumption that they switch a 2AM just
# as everybody else does.
# Brazil
# The OAG lists October 25, 1987 and February 12, 1988 as the starting and
# ending dates, giving them as "estimated date(s) based on previous year". We
# infer a rule here from one example, always a dangerous practice.... Yes,
# they really do switch on Saturday, according to the OAG.
# "Brazil/Acre" is for the Territory of Acre; "Brazil/DeNoronha" is for
# Fernando De Noronha.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Brazil 1987 max - Feb Sat<=14 2:00 0 S
Rule Brazil 1987 max - Oct Sat<=28 2:00 1:00 D
# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
Zone Brazil/East -3:00 Brazil E%sT
Zone Brazil/West -4:00 Brazil W%sT
Zone Brazil/Acre -5:00 Brazil A%sT
Zone Brazil/DeNoronha -2:00 Brazil F%sT
# Chile
# The OAG lists October 11, 1987 and March 12, 1988 as the starting and
# ending dates, giving them as "estimated date(s) based on previous year."
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Chile 1987 max - Mar Sun<=14 2:00 0 S
Rule Chile 1987 max - Oct Sun<=14 2:00 1:00 D
# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
Zone Chile/Continental -4:00 Chile C%sT
Zone Chile/EasterIsland -6:00 Chile E%sT
End of southamerica
echo 'asia' 1>&2
cat >'asia' <<'End of asia'
# @(#)asia 3.3
# Incorporates data for Singapore from Robert Elz' asia 1.1, as well as
# additional information from Tom Yap, Sun Microsystems Intercontinental
# Technical Support (including a page from the Official Airline Guide -
# Worldwide Edition). The names for time zones are guesses.
# People's Republic of China. Yes, they really have only one time zone.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule PRC 1970 max - Apr Sun<=14 2:00 1:00 D
Rule PRC 1970 max - Sep Sun<=14 3:00 0 S
# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
Zone PRC 8:00 PRC C%sT
# Republic of Korea. According to someone at the Korean Times in San Francisco,
# Daylight Savings Time was not observed until 1987. He did not know
# at what time of day DST starts or ends.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule ROK 1987 max - May Sun<=14 2:00 1:00 D
Rule ROK 1987 max - Oct Sun<=14 3:00 0 S
# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
Zone ROK 9:00 - KST 1987
9:00 ROK K%sT
# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
Zone Japan 9:00 - JST
Zone Singapore 8:00 - SST
Zone Hongkong 8:00 - HKT
Zone ROC 8:00 - CST
# Israel
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Israel 1987 max - Apr Sun<=21 2:00 1:00 D
Rule Israel 1987 max - Aug Sat<=28 2:00 0 S
# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
Zone Israel 3:00 Israel I%sT
End of asia
exit
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