Update.

	* timezone/antarctica: Update from tzdata2001a.
	* timezone/asia: Likewise.
	* timezone/australasia: Likewise.
	* timezone/backward: Likewise.
	* timezone/etcetera: Likewise.
	* timezone/europe: Likewise.
	* timezone/leapseconds: Likewise.
	* timezone/northamerica: Likewise.
	* timezone/southamerica: Likewise.
	* timezone/systemv: Likewise.
	* timezone/yearistype: Likewise.
	* timezone/zone.tab: Likewise.
	* timezone/tzdump.c: Update from tzcode2001a.

2001-03-15  H.J. Lu  <hjl@gnu.org>

	* intl/Makefile: Fix a typo.

2001-03-14  David Mosberger  <davidm@hpl.hp.com>

	* gmon/gmon.c (write_call_graph): Avoid unaligned accesses when
	writing arc structures.

2001-03-15  H.J. Lu  <hjl@gnu.org>

	* elf/Makefile ($(objpfx)tst-pathopt.out): Protected against
	cross-compiling.

2001-03-13  Andreas Schwab  <schwab@suse.de>

	* posix/PTESTS2C.sed: Replace literal CRs by `\r'.

2001-03-15  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/unix/sysv/linux/cmsg_nxthdr.c (__cmsg_nxthdr): Fix test
	for control message fitting into message data.
	Patch by James Antill <james@and.org>.

1 files changed, 167 insertions, 77 deletions

diff --git a/timezone/northamerica b/timezone/northamerica
index dbaae340eb..9266fab046 100644
--- a/timezone/northamerica
+++ b/timezone/northamerica
@@ -1,4 +1,4 @@
-# @(#)northamerica	7.54
+# @(#)northamerica	7.56
 # also includes Central America and the Caribbean
 
 # This data is by no means authoritative; if you think you know better,
@@ -31,9 +31,10 @@
 # Make sure you have the errata sheet; the book is somewhat useless without it.
 # It is the source for the US and Puerto Rico entries below.
 
-# From Paul Eggert (1996-06-12):
+# From Paul Eggert (2001-03-06):
 # Daylight Saving Time was first suggested as a joke by Benjamin Franklin
-# in his whimsical essay ``Turkey vs Eagle, McCauley is my Beagle'' (1784).
+# in his whimsical essay ``An Economical Project for Diminishing the Cost
+# of Light'' published in the Journal de Paris (1784-04-26).
 # Not everyone is happy with the results:
 #
 #	I don't really care how time is reckoned so long as there is some
@@ -48,6 +49,16 @@
 #	them healthy, wealthy and wise in spite of themselves.
 #
 #	-- Robertson Davies, The Diary of Samuel Marchbanks (1947), XIX, Sunday
+#
+# For more about the first ten years of DST in the United States, see
+# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html">
+# Ten years of daylight saving from the Pittsburgh standpoint
+# (Carnegie Library of Pittsburgh, 1927)</a>.
+#
+# Shanks says that DST was called "War Time" in the US in 1918 and 1919.
+# However, DST was imposed by the Standard Time Act of 1918, which
+# was the first nationwide legal time standard, and apparently
+# time was just called "Standard Time" or "Daylight Saving Time".
 
 # From Arthur David Olson:
 # US Daylight Saving Time ended on the last Sunday of *October* in 1974.
@@ -77,14 +88,8 @@
 # of surrender, all of whom interrupting the bells of Big Ben in
 # London which were to precede Mr. Atlee's speech.
 
-# From Paul Eggert (2000-10-02):
-# Shanks says that DST was called "War Time" in the US in 1919.
-# In the light of the above, this seems suspect;
-# but we have no better authority yet.
-
-
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	US	1918	1919	-	Mar	lastSun	2:00	1:00	W # War
+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	-	Aug	14	23:00u	1:00	P # Peace
@@ -174,6 +179,19 @@ Rule	US	1987	max	-	Apr	Sun>=1	2:00	1:00	D
 # From Paul Eggert (1995-12-19):
 # Shanks uses 1983-10-30, not 1983-11-30, for the 1983 transitions.
 # Go with Shanks.
+#
+# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
+# Public law 106-564 (2000-12-23) introduced the abbreviation
+# "Chamorro Standard Time" for time in Guam and the Northern Marianas.
+# See the file "australasia".
+
+# From Ryan Alessi of the Thousand Oaks Star (2001-02-15) via Rives McDow:
+# Brad Sherman, D-Sherman Oaks, introduced a bill in Congress on
+# Wednesday that could have California operating on Denver time as
+# early as this summer....  The options include keeping
+# daylight-saving time all year long, or setting clocks back two hours
+# -- instead of just one -- during the existing daylight-saving time.
+
 
 # US Eastern time, represented by New York
 
@@ -226,7 +244,8 @@ Zone America/Chicago	-5:50:36 -	LMT	1883 Nov 18 12:00
 #
 # Colorado, southern Idaho, far western Kansas, Montana, western
 # Nebraska, New Mexico, southwestern North Dakota, far eastern Oregon,
-# western South Dakota, far western Texas, Utah, Wyoming
+# western South Dakota, far western Texas (El Paso County, Hudspeth County,
+# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
 #
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
 Rule	Denver	1920	1921	-	Mar	lastSun	2:00	1:00	D
@@ -376,6 +395,13 @@ Zone America/Boise	-7:44:49 -	LMT	1883 Nov 18 12:00
 # So we reluctantly put them all in a subdirectory `America/Indiana'.
 #
 # Most of EST-only Indiana last observed DST in 1970.
+
+# From Paul Eggert (2001-03-06), following a tip by Markus Kuhn:
+# Pam Belluck reported in the New York Times (2001-01-31) that the
+# Indiana Legislature is considering a bill to adopt DST statewide.
+# Her article mentioned Vevay, whose post office observes a different
+# time zone than Danner's Hardware across the street.
+
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
 Rule Indianapolis 1941	only	-	Jun	22	2:00	1:00	D
 Rule Indianapolis 1941	1954	-	Sep	lastSun	2:00	0	S
@@ -521,6 +547,11 @@ Zone America/Kentucky/Monticello -5:39:24 - LMT	1883 Nov 18 12:00
 #
 # This story is too entertaining to be false, so go with Howse over Shanks.
 #
+# From Paul Eggert (2001-03-06):
+# Garland (1927) writes ``Cleveland and Detroit advanced their clocks
+# one hour in 1914.''  This change is not in Shanks.  We have no more
+# info, so omit this for now.
+#
 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
 Rule	Detroit	1948	only	-	Apr	lastSun	2:00	1:00	D
@@ -646,7 +677,7 @@ Link	Pacific/Honolulu	HST
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Canada	1918	only	-	Apr	14	2:00	1:00	D
 Rule	Canada	1918	only	-	Oct	31	2:00	0	S
-Rule	Canada	1942	only	-	Feb	 9	2:00	1:00	D
+Rule	Canada	1942	only	-	Feb	 9	2:00	1:00	W
 Rule	Canada	1945	only	-	Sep	30	2:00	0	S
 Rule	Canada	1974	1986	-	Apr	lastSun	2:00	1:00	D
 Rule	Canada	1974	max	-	Oct	lastSun	2:00	0	S
@@ -675,13 +706,13 @@ Rule	StJohns	1920	1935	-	Oct	lastSun	23:00	0	S
 Rule	StJohns	1936	1941	-	May	Sun>=8	0:00	1:00	D
 Rule	StJohns	1936	1941	-	Oct	Sun>=1	0:00	0	S
 # Shanks gives 1942 May 11 - 1945 Sep 30; go with Whitman.
-Rule	StJohns	1942	only	-	Mar	 1	0:00	1:00	D
+Rule	StJohns	1942	only	-	Mar	 1	0:00	1:00	W
 Rule	StJohns	1942	only	-	Dec	31	0:00	0	S
-Rule	StJohns	1943	only	-	May	30	0:00	1:00	D
+Rule	StJohns	1943	only	-	May	30	0:00	1:00	W
 Rule	StJohns	1943	only	-	Sep	 5	0:00	0	S
-Rule	StJohns	1944	only	-	Jul	10	0:00	1:00	D
+Rule	StJohns	1944	only	-	Jul	10	0:00	1:00	W
 Rule	StJohns	1944	only	-	Sep	 2	0:00	0	S
-Rule	StJohns	1945	only	-	Jan	 1	0:00	1:00	D
+Rule	StJohns	1945	only	-	Jan	 1	0:00	1:00	W
 Rule	StJohns	1945	only	-	Oct	 7	2:00	0	S
 # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
 # Apr 30 - Sep 24; go with Shanks.
@@ -765,7 +796,7 @@ Rule Halifax	1937	1938	-	May	Sun>=1	0:00	1:00	D
 Rule Halifax	1937	1941	-	Sep	Mon>=24	0:00	0	S
 Rule Halifax	1939	only	-	May	28	0:00	1:00	D
 Rule Halifax	1940	1941	-	May	Sun>=1	0:00	1:00	D
-Rule Halifax	1942	only	-	Feb	9	2:00	1:00	D
+Rule Halifax	1942	only	-	Feb	9	2:00	1:00	W
 Rule Halifax	1945	1959	-	Sep	lastSun	2:00	0	S
 Rule Halifax	1946	1959	-	Apr	lastSun	2:00	1:00	D
 Rule Halifax	1962	1986	-	Apr	lastSun	2:00	1:00	D
@@ -867,7 +898,7 @@ Rule	Winn	1918	only	-	Apr	14	2:00	1:00	D
 Rule	Winn	1918	only	-	Oct	31	2:00	0	S
 Rule	Winn	1937	only	-	May	16	2:00	1:00	D
 Rule	Winn	1937	only	-	Sep	26	2:00	0	S
-Rule	Winn	1942	only	-	Feb	 9	2:00	1:00	D
+Rule	Winn	1942	only	-	Feb	 9	2:00	1:00	W
 Rule	Winn	1945	only	-	Sep	lastSun	2:00	0	S
 Rule	Winn	1946	only	-	May	12	2:00	1:00	D
 Rule	Winn	1946	only	-	Oct	13	2:00	0	S
@@ -937,7 +968,7 @@ Rule	Regina	1937	1941	-	Apr	Sun>=8	0:00	1:00	D
 Rule	Regina	1937	only	-	Oct	Sun>=8	0:00	0	S
 Rule	Regina	1938	only	-	Oct	Sun>=1	0:00	0	S
 Rule	Regina	1939	1941	-	Oct	Sun>=8	0:00	0	S
-Rule	Regina	1942	only	-	Feb	 9	2:00	1:00	D
+Rule	Regina	1942	only	-	Feb	 9	2:00	1:00	W
 Rule	Regina	1945	only	-	Sep	lastSun	2:00	0	S
 Rule	Regina	1946	only	-	Apr	Sun>=8	2:00	1:00	D
 Rule	Regina	1946	only	-	Oct	Sun>=8	2:00	0	S
@@ -970,7 +1001,7 @@ Rule	Edm	1919	only	-	May	27	2:00	0	S
 Rule	Edm	1920	1923	-	Apr	lastSun	2:00	1:00	D
 Rule	Edm	1920	only	-	Oct	lastSun	2:00	0	S
 Rule	Edm	1921	1923	-	Sep	lastSun	2:00	0	S
-Rule	Edm	1942	only	-	Feb	 9	2:00	1:00	D
+Rule	Edm	1942	only	-	Feb	 9	2:00	1:00	W
 Rule	Edm	1945	only	-	Sep	lastSun	2:00	0	S
 Rule	Edm	1947	only	-	Apr	lastSun	2:00	1:00	D
 Rule	Edm	1947	only	-	Sep	lastSun	2:00	0	S
@@ -996,7 +1027,7 @@ Zone America/Edmonton	-7:33:52 -	LMT	1906 Sep
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Vanc	1918	only	-	Apr	14	2:00	1:00	D
 Rule	Vanc	1918	only	-	Oct	31	2:00	0	S
-Rule	Vanc	1942	only	-	Feb	 9	2:00	1:00	D
+Rule	Vanc	1942	only	-	Feb	 9	2:00	1:00	W
 Rule	Vanc	1945	only	-	Sep	30	2:00	0	S
 Rule	Vanc	1946	1986	-	Apr	lastSun	2:00	1:00	D
 Rule	Vanc	1946	only	-	Oct	13	2:00	0	S
@@ -1078,7 +1109,7 @@ Zone America/Dawson_Creek -8:00:56 -	LMT	1884
 # From Paul Eggert (2000-10-02):
 # Matthews and Vincent (1998) say the following, but we lack histories
 # for these potential new Zones.
-# 
+#
 # The Canadian Forces station at Alert uses Eastern Time while the
 # handful of residents at the Eureka weather station [in the Central
 # zone] skip daylight savings.  Baffin Island, which is crossed by the
@@ -1100,6 +1131,9 @@ Zone America/Dawson_Creek -8:00:56 -	LMT	1884
 # central time, while Kugluktuk, even farther west, reverted to
 # mountain time, which they had used before the advent of Nunavut's
 # unified time zone in 1999.
+#
+# From Rives McDow (2001-01-20), quoting the Nunavut government:
+# The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
 
 # From Paul Eggert (2000-12-04):
 # Let's just keep track of the official times for now.
@@ -1109,7 +1143,7 @@ Rule	NT_YK	1918	only	-	Apr	14	2:00	1:00	D
 Rule	NT_YK	1918	only	-	Oct	27	2:00	0	S
 Rule	NT_YK	1919	only	-	May	25	2:00	1:00	D
 Rule	NT_YK	1919	only	-	Nov	 1	0:00	0	S
-Rule	NT_YK	1942	only	-	Feb	 9	2:00	1:00	D
+Rule	NT_YK	1942	only	-	Feb	 9	2:00	1:00	W
 Rule	NT_YK	1945	only	-	Sep	30	2:00	0	S
 Rule	NT_YK	1965	only	-	Apr	lastSun	0:00	2:00	DD
 Rule	NT_YK	1965	only	-	Oct	lastSun	2:00	0	S
@@ -1131,6 +1165,8 @@ Zone America/Rankin_Inlet -6:08:40 -	LMT	1884
 			-5:00	-	EST
 Zone America/Cambridge_Bay -7:00:20 -	LMT	1884
 			-7:00	NT_YK	M%sT	1999 Oct 31 2:00
+			-6:00	Canada	C%sT	2000 Oct 29 2:00
+			-5:00	-	EST	2000 Nov  5 0:00
 			-6:00	Canada	C%sT
 Zone America/Yellowknife -7:37:24 -	LMT	1884
 			-7:00	NT_YK	M%sT
@@ -1149,31 +1185,29 @@ Zone America/Dawson	-9:17:40 -	LMT	1900 Aug 20
 
 # Mexico
 
-# Gwillim Law reports this source for daylight saving time in Mexico:
-# <a href="http://www.spin.com.mx/verano/">
-# Daylight saving time * SPIN-Internet (in Spanish)
-# </a>
-# Law (2000-03-09) translates it as follows:
-#
-# Standard time effective in Mexico takes its origin in the
-# presidential decree of April 24, 1942.  The time of the 120th
-# meridian applies to the state of Baja California; of the 105th
-# meridian to the states of Baja California Sur, Sonora, Sinaloa, and
-# Nayarit; and the time of the 90th meridian to the rest of the
-# country.
-#
-# In the country, there have been several attempts made to adapt
-# standard time with the object of arriving at a better use of
-# daylight for social and economic activities.  In December, 1981 a
-# permanent time zone was decreed for the states of Campeche, Yucatan,
-# and Quintana Roo, displacing them from the 90th to the 75th
-# meridian.  This disposition was annulled on December 2, 1982.
-#
-# In 1988 a Summer Time was established for the states of Tamaulipas,
-# Nuevo Leon, Coahuila, and Durango, which meant that from the first
-# Sunday in April to the last [Sunday] of October those states
-# displaced their time from the 90th to the 75th meridian.  That
-# disposition lasted for one year.
+# From Paul Eggert (2001-03-05):
+# The Investigation and Analysis Service of the
+# Mexican Library of Congress (MLoC) has published a
+# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/">
+# history of Mexican local time (in Spanish)
+# </a>.
+#
+# Here are the discrepancies between Shanks and the MLoC.
+# (In all cases we go with the MLoC.)
+# Shanks reports that Baja was at -8:00 in 1922/1923.
+# Shanks says the 1930 transition in Baja was 1930-11-16.
+# Shanks reports no DST during summer 1931.
+# Shanks reports a transition at 1032-03-30 23:00, not 1932-04-01.
+# Shanks does not report transitions for Baja in 1945 or 1948.
+# Shanks reports southern Mexico transitions on 1981-12-01, not 12-23.
+# Shanks says Quintana Roo switched to -6:00 on 1982-12-02, and to -5:00
+# on 1997-10-26 at 02:00.
+
+# From Gwillim Law (2001-02-20):
+# There are some other discrepancies between the Decrees page and the
+# tz database.  I think they can best be explained by supposing that
+# the researchers who prepared the Decrees page failed to find some of
+# the relevant documents.
 
 # From Paul Eggert (2000-07-26):
 # Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981
@@ -1223,54 +1257,91 @@ Zone America/Dawson	-9:17:40 -	LMT	1900 Aug 20
 # savings time so as to stay on the same time zone as the southern part of
 # Arizona year round.
 
-# From Jesper Norgaard (2000-12-02):
-# No changes have been implemented yet, but the new elected president
-# Vicente Fox seems to agree with his presidential candidate opponent
-# Labastida that daylight saving should not be discontinued, but maybe
-# reduced with a couple of months, e.g. starting one month later and
-# ending one month earlier:
-# http://www.reforma.com/nacional/articulo/044581/
+# From Jesper Norgaard, translating
+# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
+# In Oaxaca, the 55.000 teachers from the Section 22 of the National
+# Syndicate of Education Workers, refuse to apply daylight saving each
+# year, so that the more than 10,000 schools work at normal hour the
+# whole year.
+
+# From Gwillim Law (2001-01-19):
+# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
+# (translated):...
+# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
+# that Summer Time will be reduced from seven to five months, starting
+# this year....
+# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001>
+# [translated], says "summer time will ... take effect on the first Sunday
+# in May, and end on the last Sunday of September.
+
+# From Arthur David Olson (2001-01-25):
+# The 2001-01-24 traditional Washington Post contained the page one
+# story "Timely Issue Divides Mexicans."...
+# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
+# ... Mexico City Mayor Lopez Obrador "...is threatening to keep
+# Mexico City and its 20 million residents on a different time than
+# the rest of the country..." In particular, Lopez Obrador would abolish
+# observation of Daylight Saving Time.
+
+# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre">
+# Official statute published by the Energy Department
+# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
+# and Sonora with no DST.  This was reported by Jesper Norgaard (2001-02-03).
+
+# From Paul Eggert (2001-03-03):
+#
+# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html">
+# James F. Smith writes in today's LA Times
+# </a>
+# * Sonora will continue to observe standard time.
+# * Border states including Baja California, Chihuahua, and Nuevo Leon
+#   will use US rules,
+# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that
+#   the Federal District will not adopt DST.
+# * 4 of 16 district leaders announced they'll ignore the decree.
+# * The decree does not affect federal-controlled facilities including
+#   the airport, banks, hospitals, and schools.
+#
+# For now we'll assume that the Federal District will bow to federal rules
+# and that border states and Durango will stick with US rules.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Mexico	1939	only	-	Feb	5	0:00	1:00	D
 Rule	Mexico	1939	only	-	Jun	25	0:00	0	S
 Rule	Mexico	1940	only	-	Dec	9	0:00	1:00	D
 Rule	Mexico	1941	only	-	Apr	1	0:00	0	S
-Rule	Mexico	1943	only	-	Dec	16	0:00	1:00	D
+Rule	Mexico	1943	only	-	Dec	16	0:00	1:00	W
 Rule	Mexico	1944	only	-	May	1	0:00	0	S
 Rule	Mexico	1950	only	-	Feb	12	0:00	1:00	D
 Rule	Mexico	1950	only	-	Jul	30	0:00	0	S
-Rule	Mexico	1996	max	-	Apr	Sun>=1	2:00	1:00	D
-Rule	Mexico	1996	max	-	Oct	lastSun	2:00	0	S
-#
-Rule	BajaN	1954	1961	-	Apr	lastSun	2:00	1:00	D
-Rule	BajaN	1954	1961	-	Sep	lastSun	2:00	0	S
+Rule	Mexico	1996	2000	-	Apr	Sun>=1	2:00	1:00	D
+Rule	Mexico	1996	2000	-	Oct	lastSun	2:00	0	S
+Rule	Mexico	2001	max	-	May	Sun>=1	2:00	1:00	D
+Rule	Mexico	2001	max	-	Sep	lastSun	2:00	0	S
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 # Quintana Roo
 Zone America/Cancun	-5:47:04 -	LMT	1922 Jan  1  0:12:56
-			-6:00	-	CST	1981 Dec
-			-5:00	-	EST	1982 Dec  2
-			-6:00	-	CST	1996
-			-6:00	Mexico	C%sT	1997 Oct lastSun 2:00
+			-6:00	-	CST	1981 Dec 23
 			-5:00	Mexico	E%sT	1998 Aug  2  2:00
 			-6:00	Mexico	C%sT
 # Campeche, Yucatan
 Zone America/Merida	-5:58:28 -	LMT	1922 Jan  1  0:01:32
-			-6:00	-	CST	1981 Dec
+			-6:00	-	CST	1981 Dec 23
 			-5:00	-	EST	1982 Dec  2
 			-6:00	Mexico	C%sT
 # Coahuila, Durango, Nuevo Leon, Tamaulipas
-Zone America/Monterrey	-6:41:16 -	LMT	1922 Jan  1  0:01:32
+Zone America/Monterrey	-6:41:16 -	LMT	1921 Dec 31 23:18:44
 			-6:00	-	CST	1988
 			-6:00	US	C%sT	1989
-			-6:00	Mexico	C%sT
+			-6:00	Mexico	C%sT	2001
+			-6:00	US	C%sT
 # Central Mexico
 Zone America/Mexico_City -6:36:36 -	LMT	1922 Jan  1  0:23:24
 			-7:00	-	MST	1927 Jun 10 23:00
 			-6:00	-	CST	1930 Nov 15
 			-7:00	-	MST	1931 May  1 23:00
 			-6:00	-	CST	1931 Oct
-			-7:00	-	MST	1932 Mar 30 23:00
+			-7:00	-	MST	1932 Apr  1
 			-6:00	Mexico	C%sT
 # Chihuahua
 Zone America/Chihuahua	-7:04:20 -	LMT	1921 Dec 31 23:55:40
@@ -1278,18 +1349,19 @@ Zone America/Chihuahua	-7:04:20 -	LMT	1921 Dec 31 23:55:40
 			-6:00	-	CST	1930 Nov 15
 			-7:00	-	MST	1931 May  1 23:00
 			-6:00	-	CST	1931 Oct
-			-7:00	-	MST	1932 Mar 30 23:00
+			-7:00	-	MST	1932 Apr  1
 			-6:00	-	CST	1996
 			-6:00	Mexico	C%sT	1998
 			-6:00	-	CST	1998 Apr Sun>=1 3:00
-			-7:00	Mexico	M%sT
+			-7:00	Mexico	M%sT	2001
+			-7:00	US	M%sT
 # Sonora
 Zone America/Hermosillo	-7:23:52 -	LMT	1921 Dec 31 23:36:08
 			-7:00	-	MST	1927 Jun 10 23:00
 			-6:00	-	CST	1930 Nov 15
 			-7:00	-	MST	1931 May  1 23:00
 			-6:00	-	CST	1931 Oct
-			-7:00	-	MST	1932 Mar 30 23:00
+			-7:00	-	MST	1932 Apr  1
 			-6:00	-	CST	1942 Apr 24
 			-7:00	-	MST	1949 Jan 14
 			-8:00	-	PST	1970
@@ -1301,20 +1373,38 @@ Zone America/Mazatlan	-7:05:40 -	LMT	1921 Dec 31 23:54:20
 			-6:00	-	CST	1930 Nov 15
 			-7:00	-	MST	1931 May  1 23:00
 			-6:00	-	CST	1931 Oct
-			-7:00	-	MST	1932 Mar 30 23:00
+			-7:00	-	MST	1932 Apr  1
 			-6:00	-	CST	1942 Apr 24
 			-7:00	-	MST	1949 Jan 14
 			-8:00	-	PST	1970
 			-7:00	Mexico	M%sT
 # Baja California
 Zone America/Tijuana	-7:48:04 -	LMT	1922 Jan  1  0:11:56
+			-7:00	-	MST	1924
 			-8:00	-	PST	1927 Jun 10 23:00
-			-7:00	-	MST	1930 Nov 16
+			-7:00	-	MST	1930 Nov 15
+			-8:00	-	PST	1931 Apr  1
+			-8:00	1:00	PDT	1931 Sep 30
 			-8:00	-	PST	1942 Apr 24
-			-7:00	-	MST	1949 Jan 14
-			-8:00	BajaN	P%sT	1976
+			-8:00	1:00	PWT	1945 Nov 12
+			-8:00	-	PST	1948 Apr  5
+			-8:00	1:00	PDT	1949 Jan 14
+			-8:00	-	PST	1954
+			-8:00	CA	P%sT	1961
+			-8:00	-	PST	1976
 			-8:00	US	P%sT	1996
-			-8:00	Mexico	P%sT
+			-8:00	Mexico	P%sT	2001
+			-8:00	US	P%sT
+# From Paul Eggert (2001-03-05):
+# Formerly there was an America/Ensenada zone, which differed from
+# America/Tijuana only in that it did not observe DST from 1976
+# through 1995.  This was as per Shanks.  However, Guy Harris reports
+# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and
+# Tijuana observe DST," which contradicts Shanks but does imply that
+# DST-observance was a town-by-town matter back then.  This concerns
+# data after 1970 so most likely there should be at least one Zone
+# other than America/Tijuana for Baja, but it's not clear yet what its
+# name or contents should be.
 #
 # Revillagigedo Is
 # no information