Proposed changes to tz package
Paul Eggert
eggert at twinsun.com
Wed Dec 10 08:37:57 UTC 2003
At Thu, 4 Dec 2003 12:19:40 -0500, "Olson, Arthur David (NIH/NCI)" <olsona at dc37a.nci.nih.gov> writes:
> Here are proposed change to the time zone package.
Those changes look good. Here is a set of proposed further changes to
fix a few minor typos, and correct some other historical data. None
of these are urgent, but while we're fixing things we might as well
get up-to-date.
I've sent you the Makefile changes by private mail so that part may be
repetitive, but the other stuff should be all new.
Makefile changes:
* Add a 'maintainer-clean' action to remove files that the maintainers
know how to recreate.
* Exit immediately if an iteration of a for-loop fails.
Historical time-stamp changes:
* America/Cuiaba did not observe DST in 1994/1995. Also, assume that
America/Noronha was like Pernambuco, as Brazilian law specifies,
and observed DST in 1999/2000 and 2001/2002. (Thanks to
Rodrigo Severo for this info.)
* Peru observed DST in early 1986. (Thanks to Evelyn C. Leeper via
Mark Brader for this info.)
* Fix several Malaysia and Singapore entries before 1983.
Among other things, they enjoyed 20-minute DST from 1933 to 1936,
and we have more-accurate dates for WWII transitions.
(Thanks to Mok Ly Yng for this info.)
* Toronto transitions in the 1930s were at 02:00, not at 00:00, says Shanks.
(This fixes a typo that I introduced earlier; sorry.)
* Thunder Bay did not officially observe DST before 1942.
(Thanks to David Bryan and the Thunder Bay Museum for this info.)
Data cleanup that should not result in any user-visible change:
* Simplify the representation of the Montreal transitions in the 1930s.
Commentary changes:
* Normalize some spellings of Russian districts (Thanks to Oscar van
Vlijmen for this info.)
* Mention more details about time zone boundaries in the US.
* Chiselhurst -> Chislehurst (Thanks to Gwillim Law for this.)
HTML changes:
* Add references to the Perl DateTime Project.
* Add reference to the munnari archive for old tz data.
* Add reference to "Time zone boundaries for multizone countries".
* Add references for Malaysia, Singapore.
* Vzic and Statoids moved.
Man page change:
* Italicize "zic".
diff -pru tz-tmp/Makefile tz/Makefile
--- tz-tmp/Makefile 2003-12-09 21:45:59.395178000 -0800
+++ tz/Makefile 2003-12-10 00:08:36.000000000 -0800
@@ -376,6 +376,11 @@ clean:
rm -f core *.o *.out tzselect zdump zic yearistype date \
,* *.tar.gz
+maintainer-clean: clean
+ @echo 'This command is intended for maintainers to use; it'
+ @echo 'deletes files that may need special tools to rebuild.'
+ rm -f *.txt
+
names:
@echo $(ENCHILADA)
@@ -384,9 +389,9 @@ names:
public: $(ENCHILADA) zic
-mkdir /tmp/,tzpublic
-for i in $(TDATA) ; do zic -v -d /tmp/,tzpublic $$i 2>&1 | grep -v "starting year" ; done
- for i in $(TDATA) ; do zic -d /tmp/,tzpublic $$i; done
+ for i in $(TDATA) ; do zic -d /tmp/,tzpublic $$i || exit; done
rm -f -r /tmp/,tzpublic
- for i in *.[1-8] ; do sh workman.sh $$i > $$i.txt; done
+ for i in *.[1-8] ; do sh workman.sh $$i > $$i.txt || exit; done
$(AWK) -f checktab.awk $(PRIMARY_YDATA)
tar cf - $(DOCS) $(SOURCES) $(MISC) *.[1-8].txt | gzip -9 > tzcode.tar.gz
tar cf - $(DATA) | gzip -9 > tzdata.tar.gz
diff -pru tz-tmp/asia tz/asia
--- tz-tmp/asia 2003-10-06 06:32:20.000000000 -0700
+++ tz/asia 2003-12-10 00:08:36.000000000 -0800
@@ -1011,22 +1011,33 @@ Zone Asia/Beirut 2:22:00 - LMT 1880
Rule NBorneo 1935 1941 - Sep 14 0:00 0:20 TS # one-Third Summer
Rule NBorneo 1935 1941 - Dec 14 0:00 0 -
#
-# Zone NAME GMTOFF RULES FORMAT [UNTIL]
# peninsular Malaysia
+# From Paul Eggert (2003-11-01):
+# The data here are taken from Mok Ly Yng (2003-10-30)
+# <http://www.math.nus.edu.sg/aslaksen/teaching/timezone.html>.
+# Before 1901, Penang, Malacca and Singapore each had their own time zone;
+# assume Kuala Lumpur used Malaccan time.
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Kuala_Lumpur 6:46:48 - LMT 1880
- 6:55:24 - SMT 1905 Jun # Singapore Mean Time
- 7:00 - MALT 1933 # Malaya Time
- 7:20 - MALT 1942 Feb 15
- 9:00 - JST 1945 Sep 2
- 7:20 - MALT 1950
- 7:30 - MALT 1982 May
+ 6:49:00 - MMT 1901 Jan 1 # Malacca Mean Time
+ 6:55:25 - SMT 1905 Jun 1 # Singapore M.T.
+ 7:00 - MALT 1933 Jan 1 # Malaya Time
+ 7:00 0:20 MALST 1936
+ 7:20 - MALT 1941 Sep 1
+ 7:30 - MALT 1942 Feb 16
+ 9:00 - JST 1945 Sep 12
+ 7:30 - MALT 1982 Jan 1
8:00 - MYT # Malaysia Time
# Sabah & Sarawak
+# From Paul Eggert (2003-11-01):
+# The data here are mostly from Shanks, but the 1942, 1945 and 1982
+# transition dates are from Mok Ly Yng.
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Kuching 7:21:20 - LMT 1926 Mar
7:30 - BORT 1933 # Borneo Time
- 8:00 NBorneo BOR%sT 1942
- 9:00 - JST 1945 Sep 2
- 8:00 - BORT 1982 May
+ 8:00 NBorneo BOR%sT 1942 Feb 16
+ 9:00 - JST 1945 Sep 12
+ 8:00 - BORT 1982 Jan 1
8:00 - MYT
# Maldives
@@ -1295,15 +1306,18 @@ Zone Asia/Riyadh 3:06:52 - LMT 1950
3:00 - AST
# Singapore
+# The data here are taken from Mok Ly Yng (2003-10-30)
+# <http://www.math.nus.edu.sg/aslaksen/teaching/timezone.html>.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone Asia/Singapore 6:55:24 - LMT 1880
- 6:55:24 - SMT 1905 Jun # Singapore Mean Time
- 7:00 - MALT 1933 # Malaya Time
- 7:20 - MALT 1942 Feb 15
- 9:00 - JST 1945 Sep 2
- 7:20 - MALT 1950
+Zone Asia/Singapore 6:55:25 - LMT 1880
+ 6:55:25 - SMT 1905 Jun 1 # Singapore M.T.
+ 7:00 - MALT 1933 Jan 1 # Malaya Time
+ 7:00 0:20 MALST 1936
+ 7:20 - MALT 1941 Sep 1
+ 7:30 - MALT 1942 Feb 16
+ 9:00 - JST 1945 Sep 12
7:30 - MALT 1965 Aug 9 # independence
- 7:30 - SGT 1982 May # Singapore Time
+ 7:30 - SGT 1982 Jan 1 # Singapore Time
8:00 - SGT
# Spratly Is
diff -pru tz-tmp/europe tz/europe
--- tz-tmp/europe 2003-12-09 21:44:55.825043000 -0800
+++ tz/europe 2003-12-10 00:08:36.000000000 -0800
@@ -129,7 +129,7 @@
# transition date for London, namely 1847-12-01. We don't know as much
# about Dublin, so we use 1880-08-02, the legal transition time.
-# From Paul Eggert (2003-07-29):
+# From Paul Eggert (2003-09-27):
# Summer Time was first seriously proposed by William Willett (1857-1915),
# a London builder and member of the Royal Astronomical Society
# who circulated a pamphlet ``The Waste of Daylight'' (1907)
@@ -141,7 +141,7 @@
# it was eventually adopted as a wartime measure in 1916.
# See: Summer Time Arrives Early, The Times (2000-05-18).
# A monument to Willett was unveiled on 1927-05-21, in an open space in
-# a 45-acre wood near Chiselhurst, Kent that was purchased by popular
+# a 45-acre wood near Chislehurst, Kent that was purchased by popular
# subscription and open to the public. On the south face of the monolith,
# designed by G. W. Miller, is the the William Willett Memorial Sundial,
# which is permanently set to Summer Time.
@@ -1952,28 +1952,26 @@ Zone Asia/Irkutsk 6:57:20 - LMT 1880
7:00 Russia IRK%sT 1992 Jan 19 2:00s
8:00 Russia IRK%sT
#
-# From Oscar van Vlijmen (2001-08-25): [This region consists of]
+# From Oscar van Vlijmen (2003-10-18): [This region consists of]
# Aginskij Buryatskij avtonomnyj okrug, Amurskaya oblast',
# [parts of] Respublika Sakha (Yakutiya), Chitinskaya oblast'.
-#
-# From Alan Pritchard (2001-08-24): [The Sakha districts are:]
-# Aldansky, Amginsky, Anabarsky, Bulunsky, Churapchinsky,
-# Eveno-Bytantaisky, Gorny, Khangalassky, Kobyaisky, Lensky,
-# Megino-Kangalassky, Mirninsky, Namsky, Nyurbinsky, Olenyoksky,
-# Olyokminsky, Srednekolymsky, Suntarsky, Tattinsky, Ust-Aldansky,
-# Verkhnekolymsky, Verkhnevilyuisky, Vilyuisky, Zhigansky.
+# The Sakha districts are: Aldanskij, Amginskij, Anabarskij,
+# Bulunskij, Verkhnekolymskij, Verkhnevilyujskij, Vilyujskij, Gornyj,
+# Zhiganskij, Kobyajskij, Lenskij, Megino-Kangalasskij, Mirninskij,
+# Namskij, Nyurbinskij, Olenekskij, Olekminskij, Srednekolymskij,
+# Suntarskij, Tattinskij, Ust'-Aldanskij, Khangalasskij,
+# Churapchinskij, Eveno-Bytantajskij.
Zone Asia/Yakutsk 8:38:40 - LMT 1919 Dec 15
8:00 - YAKT 1930 Jun 21 # Yakutsk Time
9:00 Russia YAK%sT 1991 Mar 31 2:00s
8:00 Russia YAK%sT 1992 Jan 19 2:00s
9:00 Russia YAK%sT
#
-# From Oscar van Vlijmen (2001-08-25): [This region consists of]
+# From Oscar van Vlijmen (2003-10-18): [This region consists of]
# Evrejskaya avtonomnaya oblast', Khabarovskij kraj, Primorskij kraj,
# [parts of] Respublika Sakha (Yakutiya).
-#
-# From Alan Pritchard (2001-08-24): [The Sakha districts are:]
-# Tomponsky, Ust-Maisky, Ust-Yansky, Verkhoyansky.
+# The Sakha districts are: Verkhoyanskij, Tomponskij, Ust'-Majskij,
+# Ust'-Yanskij.
Zone Asia/Vladivostok 8:47:44 - LMT 1922 Nov 15
9:00 - VLAT 1930 Jun 21 # Vladivostok Time
10:00 Russia VLA%sT 1991 Mar 31 2:00s
@@ -1990,11 +1988,11 @@ Zone Asia/Sakhalin 9:30:48 - LMT 1905 A
11:00 Russia SAK%sT 1997 Mar lastSun 2:00s
10:00 Russia SAK%sT
#
-# From Oscar van Vlijmen (2001-08-25): [This region consists of]
+# From Oscar van Vlijmen (2003-10-18): [This region consists of]
# Magadanskaya oblast', Respublika Sakha (Yakutiya).
-#
-# From Alan Pritchard (2001-08-24): [The Sakha districts are:]
-# Abyisky, Allaikhovsky, Momsky, Nizhnekolymsky, Oimyakonsky.
+# Probably also: Kuril Islands.
+# The Sakha districts are: Abyjskij, Allaikhovskij, Momskij,
+# Nizhnekolymskij, Ojmyakonskij.
Zone Asia/Magadan 10:03:12 - LMT 1924 May 2
10:00 - MAGT 1930 Jun 21 # Magadan Time
11:00 Russia MAG%sT 1991 Mar 31 2:00s
diff -pru tz-tmp/northamerica tz/northamerica
--- tz-tmp/northamerica 2003-12-09 21:46:30.175249000 -0800
+++ tz/northamerica 2003-12-10 00:08:36.000000000 -0800
@@ -228,7 +228,9 @@ Zone America/New_York -4:56:02 - LMT 188
# US central time, represented by Chicago
-# Alabama, Arkansas, Florida panhandle, Illinois, western Indiana
+# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
+# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
+# Washington counties), Illinois, western Indiana
# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
@@ -258,7 +260,7 @@ Zone America/North_Dakota/Center -6:45:1
# US mountain time, represented by Denver
#
-# Colorado, southern Idaho, far western Kansas, Montana, western
+# Colorado, far western Kansas, Montana, western
# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
# New Mexico, southwestern North Dakota, far eastern Oregon,
# western South Dakota, far western Texas (El Paso County, Hudspeth County,
@@ -280,7 +282,9 @@ Zone America/Denver -6:59:56 - LMT 1883
# US Pacific time, represented by Los Angeles
#
-# California, northern Idaho, most of Nevada, most of Oregon, and Washington
+# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
+# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties),
+# most of Nevada, most of Oregon, and Washington
#
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
Rule CA 1948 only - Mar 14 2:00 1:00 D
@@ -412,7 +416,13 @@ Zone America/Phoenix -7:28:18 - LMT 1883
Link America/Denver America/Shiprock
-# Southern Idaho and eastern Oregon switched four weeks late in 1974.
+# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
+# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
+# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
+# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
+# Teton, Twin Falls, Valley, Washington counties) and eastern Oregon
+# switched four weeks late in 1974.
+#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:00
-8:00 US P%sT 1923 May 13 2:00
@@ -957,14 +967,12 @@ Rule Mont 1925 1926 - May Sun>=1 2:00 1:
# The rules below avoid use of 24:00
# (which pre-1998 versions of zic cannot handle).
Rule Mont 1927 only - May 1 0:00 1:00 D
+Rule Mont 1927 1932 - Sep lastSun 0:00 0 S
Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D
Rule Mont 1932 only - May 1 0:00 1:00 D
-Rule Mont 1933 1937 - Apr lastSun 0:00 1:00 D
-Rule Mont 1927 1932 - Sep lastSun 0:00 0 S
+Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D
Rule Mont 1933 only - Oct 1 0:00 0 S
-Rule Mont 1934 1937 - Sep lastSun 0:00 0 S
-Rule Mont 1938 1940 - Apr lastSun 0:00 1:00 D
-Rule Mont 1938 1939 - Sep lastSun 0:00 0 S
+Rule Mont 1934 1939 - Sep lastSun 0:00 0 S
Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D
Rule Mont 1945 1948 - Sep lastSun 2:00 0 S
Rule Mont 1949 1950 - Oct lastSun 2:00 0 S
@@ -983,21 +991,14 @@ Rule Toronto 1922 1926 - Sep Sun>=15 2:0
Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D
Rule Toronto 1927 1928 - Sep lastSun 2:00 0 S
Rule Toronto 1928 only - Apr lastSun 2:00 1:00 D
-Rule Toronto 1929 only - Apr lastSun 0:00 1:00 D
-Rule Toronto 1929 only - Sep lastSun 0:00 0 S
-# The 1930-to-1937 rules can be expressed more simply as
-# Rule Toronto 1930 1937 - Apr lastSat 24:00 1:00 D
-# Rule Toronto 1930 1937 - Sep lastSat 24:00 0 S
-# The rules below avoid use of 24:00
-# (which pre-1998 versions of zic cannot handle).
-Rule Toronto 1930 1931 - Apr lastSun 0:00 1:00 D
-Rule Toronto 1932 only - May 1 0:00 1:00 D
-Rule Toronto 1933 1937 - Apr lastSun 0:00 1:00 D
-Rule Toronto 1930 1932 - Sep lastSun 0:00 0 S
-Rule Toronto 1933 only - Oct 1 0:00 0 S
-Rule Toronto 1934 1937 - Sep lastSun 0:00 0 S
-Rule Toronto 1938 1940 - Apr lastSun 0:00 1:00 D
-Rule Toronto 1938 1939 - Sep lastSun 0:00 0 S
+Rule Toronto 1929 only - Apr lastSun 2:00 1:00 D
+Rule Toronto 1929 only - Sep lastSun 2:00 0 S
+Rule Toronto 1930 1931 - Apr lastSun 2:00 1:00 D
+Rule Toronto 1930 1932 - Sep lastSun 2:00 0 S
+Rule Toronto 1932 only - May 1 2:00 1:00 D
+Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D
+Rule Toronto 1933 only - Oct 1 2:00 0 S
+Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S
Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S
Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D
Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D
@@ -1015,15 +1016,19 @@ Rule Toronto 1957 1973 - Oct lastSun 2:0
# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
# Port Arthur, Ontario, the principle of the Bill has been in
# operation for the past three years, and in the City of Moose Jaw,
-# Saskatchewan, for one year." Assume that the Thunder Bay region
-# observed DST starting 1910, and Moose Jaw starting 1912, as this
-# matches the Toronto Star report about Moose Jaw. For lack of better
-# info, assume the Thunder Bay region used Willett's proposal, namely
-# third Sunday in April at 02:00 to third Sunday in September at
-# 03:00; also assume that they continued until Canada instituted
-# uniform DST in 1918.
-Rule Thunder 1910 1917 - Apr Sun>=15 2:00s 1:00 D
-Rule Thunder 1910 1917 - Sep Sun>=15 2:00s 0 S
+# Saskatchewan, for one year."
+
+# From David Bryan via Tory Tronrud, Director/Curator,
+# Thunder Bay Museum (2003-11-12):
+# There is some suggestion, however, that, by-law or not, daylight
+# savings time was being practiced in Fort William and Port Arthur
+# before 1909.... [I]n 1910, the line between the Eastern and Central
+# Time Zones was permanently moved about two hundred miles west to
+# include the Thunder Bay area.... When Canada adopted daylight
+# savings time in 1916, Fort William and Port Arthur, having done so
+# already, did not change their clocks.... During the Second World
+# War,... [t]he cities agreed to implement DST during the summer
+# months for the remainder of the war years.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Montreal -4:54:16 - LMT 1884
@@ -1040,9 +1045,8 @@ Zone America/Toronto -5:17:32 - LMT 1895
-5:00 Toronto E%sT 1974
-5:00 Canada E%sT
Zone America/Thunder_Bay -5:57:00 - LMT 1895
- -5:00 Thunder E%sT 1918
- -5:00 Canada E%sT 1940 Sep 29
- -5:00 1:00 EDT 1942 Feb 9 2:00s
+ -6:00 - CST 1910
+ -5:00 - EST 1942
-5:00 Canada E%sT 1970
-5:00 Mont E%sT 1973
-5:00 - EST 1974
diff -pru tz-tmp/southamerica tz/southamerica
--- tz-tmp/southamerica 2003-10-06 06:34:33.000000000 -0700
+++ tz/southamerica 2003-12-10 00:08:36.000000000 -0800
@@ -390,9 +390,9 @@ Rule Brazil 1993 only - Jan 31 0:00 0 -
# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28)
# adopted by same states, plus AM.
# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22)
-# adopted by same states, minus AM.
+# adopted by same states, minus AM and MT.
# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14)
-# adopted by same states, plus TO.
+# adopted by same states, plus MT and TO.
# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13)
# adds AL, SE.
Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
@@ -455,11 +455,19 @@ Rule Brazil 2003 max - Oct Sun>=15 0:00
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
#
-# Atlantic islands: Fernando de Noronha, Trindade, Martin Vaz,
-# Atol das Rocas, and Penedos de Sao Pedro e Sao Paulo
+# Fernando de Noronha (administratively part of PE)
Zone America/Noronha -2:09:40 - LMT 1914
-2:00 Brazil FN%sT 1990 Sep 17
+ -2:00 - FNT 1999 Sep 30
+ -2:00 Brazil FN%sT 2000 Oct 15
+ -2:00 - FNT 2001 Sep 13
+ -2:00 Brazil FN%sT 2002 Oct 1
-2:00 - FNT
+# Other Atlantic islands have no permanent settlement.
+# These include Trindade and Martin Vaz (administratively part of ES),
+# Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE).
+# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
+# it also included the Penedos.
#
# Amapa (AP), east Para (PA)
# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu.
@@ -528,6 +536,8 @@ Zone America/Campo_Grande -3:38:28 - LMT
#
# Mato Grosso (MT)
Zone America/Cuiaba -3:44:20 - LMT 1914
+ -4:00 Brazil AM%sT 1994 Sep 22
+ -4:00 - AMT 1995 Sep 14
-4:00 Brazil AM%sT 2003 Sep 24
-4:00 - AMT
#
@@ -811,13 +821,22 @@ Zone America/Asuncion -3:50:40 - LMT 189
-4:00 Para PY%sT
# Peru
+#
+# <a href="news:xrGmb.39935$gA1.13896113 at news4.srv.hcvlny.cv.net">
+# From Evelyn C. Leeper via Mark Brader (2003-10-26):</a>
+# When we were in Peru in 1985-1986, they apparently switched over
+# sometime between December 29 and January 3 while we were on the Amazon.
+#
+# From Paul Eggert (2003-11-02):
+# Shanks doesn't have this transition. Assume 1986 was like 1987.
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Peru 1938 only - Jan 1 0:00 1:00 S
Rule Peru 1938 only - Apr 1 0:00 0 -
Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
-Rule Peru 1987 only - Jan 1 0:00 1:00 S
-Rule Peru 1987 only - Apr 1 0:00 0 -
+Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
+Rule Peru 1986 1987 - Apr 1 0:00 0 -
Rule Peru 1990 only - Jan 1 0:00 1:00 S
Rule Peru 1990 only - Apr 1 0:00 0 -
# IATA is ambiguous for 1993/1995; go with Shanks.
diff -pru tz-tmp/tz-link.htm tz/tz-link.htm
--- tz-tmp/tz-link.htm 2003-10-06 06:32:21.000000000 -0700
+++ tz/tz-link.htm 2003-12-10 00:08:36.000000000 -0800
@@ -88,9 +88,11 @@ The data are by no means authoritative.
send changes to the <a href="mailto:tz at elsie.nci.nih.gov">time zone
mailing list</a>. You can also <a
href="mailto:tz-request at elsie.nci.nih.gov">subscribe</a> to the
-mailing list, or retrieve the <a
+mailing list, retrieve the <a
href="ftp://elsie.nci.nih.gov/pub/tzarchive.gz">archive of old
-messages</a> (in gzip compressed format).</p>
+messages</a> (in gzip compressed format), or retrieve <a
+href="ftp://munnari.oz.au/pub/oldtz/">archived older versions of code
+and data</a>.</p>
<p>
The Web has several other sources for time zone and daylight saving time data.
Here are some recent links that may be of interest.
@@ -124,7 +126,7 @@ href="http://www.ietf.org/html.charters/
Calendaring and Scheduling Working Group (calsch)</a> covers time zone
data; see its VTIMEZONE calendar component.</li>
<li>The <a
-href="http://lists.w3.org/Archives/Public/www-rdf-calendar/"><samp>www-rdf-calendar</samp></a>
+href="http://lists.w3.org/Archives/Public/www-rdf-calendar/">www-rdf-calendar</a>
list discusses <a href="http://www.w3.org/RDF/">RDF</a>-based calendar
and group scheduling systems, and has a <a
href="http://www.w3.org/2002/12/cal/#tzd">workspace on time zone
@@ -138,11 +140,23 @@ definition that corresponded to iCalenda
</ul>
<h2>Other <code>tz</code> compilers</h2>
<ul>
-<li><a href="http://primates.ximian.com/~damon/icalendar/">Olson ->
-VTIMEZONE Converter</a> describes a program Vzic that
-compiles <code>tz</code> source into iCalendar format. Vzic is freely
+<li><a href="http://www.dachaplin.dsl.pipex.com/vzic">Vzic iCalendar
+Timezone Converter</a> describes a program Vzic that compiles
+<code>tz</code> source into iCalendar-compatible VTIMEZONE files.
+Vzic is freely
available under the <a href="http://www.gnu.org/copyleft/gpl.html">GNU
General Public License (GPL)</a>.</li>
+<li><a
+href="http://search.cpan.org/dist/DateTime-TimeZone/">DateTime::TimeZone</a>
+contains a script <code>parse_olson</code> that compiles
+<code>tz</code> source into <a href="http://www.perl.org/">Perl</a>
+modules. It is part of the Perl <a
+href="http://datetime.perl.org/">DateTime Project</a>, which is freely
+available under both the GPL and the Perl <a
+href="http://www.perl.com/language/misc/Artistic.html">Artistic
+License</a>. DateTime::TimeZone also contains a script
+<code>tests_from_zdump</code> that generates test cases for each clock
+transition in the <code>tz</code> database.</li>
</ul>
<h2>Other <code>tz</code> binary file readers</h2>
<ul>
@@ -220,6 +234,9 @@ but the maps are more up to date.</li>
</ul>
<h2>Time zone boundaries</h2>
<ul>
+<li><a href="http://home-4.tiscali.nl/~t876506/Multizones.html">Time
+zone boundaries for multizone countries</a> summarizes legal
+boundaries between time zones within countries.</li>
<li>Manifold.net's <a
href="http://www.manifold.net/download/freemaps.html">Free Maps and
GIS Data</a> includes a Manifold-format map of world time zone
@@ -248,7 +265,7 @@ The time zone map is out of date, howeve
<li><a href="http://www.phys.uu.nl/~vgent/idl/idl.htm">A History of
the International Date Line</a> tells the story of the most important
time zone boundary.</li>
-<li><a href="http://www.mindspring.com/~gwil/tconcept.html">Basic Time
+<li><a href="http://www.statoids.com/tconcept.html">Basic Time
Zone Concepts</a> discusses terminological issues behind time zones.</li>
</ul>
<h2>National histories of legal time</h2>
@@ -294,6 +311,8 @@ hreflang="he">announcements (in Hebrew)<
Congress has published a <a
href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"
hreflang="es">history of Mexican local time (in Spanish)</a>.</dd>
+<dt>Malaysia</dt>
+<dd>See Singapore below.</dd>
<dt>Netherlands</dt>
<dd><a href="http://www.phys.uu.nl/~vgent/wettijd/wettijd.htm"
hreflang="nl">Legal time in the Netherlands (in Dutch)</a>
@@ -304,6 +323,11 @@ href="http://www.dia.govt.nz/diawebsite.
daylight saving</a>. The privately-maintained <a
href="http://www.astrologyhouse.co.nz/timechanges.htm">Time Changes in
New Zealand</a> has more details.</dd>
+<dt>Singapore</dt>
+<dd><a
+href="http://www.math.nus.edu.sg/aslaksen/teaching/timezone.html">Why
+is Singapore in the "Wrong" Time Zone?</a> details the
+history of legal time in Singapore and Malaysia.</dd>
<dt>United Kingdom</dt>
<dd><a
href="http://student.cusu.cam.ac.uk/~jsm28/british-time/">History of
diff -pru tz-tmp/zic.8 tz/zic.8
--- tz-tmp/zic.8 2003-12-09 21:47:02.455313000 -0800
+++ tz/zic.8 2003-12-10 00:08:36.000000000 -0800
@@ -82,7 +82,8 @@ of years representable by
.IR time (2)
values.
Also complain if a time of 24:00
-(which cannot be handled by pre-1998 versions of zic)
+(which cannot be handled by pre-1998 versions of
+.IR zic )
appears in the input.
.TP
.B \-s
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