aboutsummaryrefslogtreecommitdiff
path: root/timezone/northamerica
diff options
context:
space:
mode:
Diffstat (limited to 'timezone/northamerica')
-rw-r--r--timezone/northamerica244
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