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Rule	StJohns	1917	1918	-	Apr	Sun>=8	2:00	1:00	D
Rule	StJohns	1917	only	-	Sep	17	2:00	0	S
Rule	StJohns	1918	only	-	Oct	31	2:00	0	S
# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks.
Rule	StJohns	1919	only	-	May	 5	23:00	1:00	D
Rule	StJohns	1919	only	-	Aug	12	23:00	0	S
# For 1931-1935 Whitman gives Apr same date; go with Shanks.
Rule	StJohns	1920	1935	-	May	Sun>=1	23:00	1:00	D
Rule	StJohns	1920	1935	-	Oct	lastSun	23:00	0	S
# For 1936-1941 Shanks gives May Mon>=9 and Oct Mon>=2; go with Whitman.
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	-	Dec	31	0:00	0	S
Rule	StJohns	1943	only	-	May	30	0:00	1:00	D
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	-	Sep	 2	0:00	0	S
Rule	StJohns	1945	only	-	Jan	 1	0:00	1:00	D
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.
Rule	StJohns	1946	1950	-	May	Sun>=8	2:00	1:00	D
Rule	StJohns	1946	1950	-	Oct	Sun>=2	2:00	0	S
Rule	StJohns	1951	1986	-	Apr	lastSun	2:00	1:00	D
Rule	StJohns	1951	1959	-	Sep	lastSun	2:00	0	S
Rule	StJohns	1960	max	-	Oct	lastSun	2:00	0	S
Rule	StJohns	1987	only	-	Apr	Sun>=1	2:00	1:00	D
Rule	StJohns	1988	only	-	Apr	Sun>=1	2:00	2:00	D
Rule	StJohns	1989	max	-	Apr	Sun>=1	2:00	1:00	D
# St John's has an apostrophe, but Posix file names can't have apostrophes.
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/St_Johns	-3:30:52 -	LMT	1884
			-3:31	StJohns	N%sT	1935 Mar 30
			-3:30	StJohns	N%sT

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule Halifax	1902	only	-	Jun	15	0:00	0	S
Rule Halifax	1916	only	-	Apr	 1	0:00	1:00	D
Rule Halifax	1916	only	-	Oct	 1	0:00	0	S
Rule Halifax	1918	only	-	Apr	14	2:00	1:00	D
Rule Halifax	1918	only	-	Oct	31	2:00	0	S
Rule Halifax	1920	only	-	May	 9	0:00	1:00	D
Rule Halifax	1920	only	-	Aug	29	0:00	0	S
Rule Halifax	1921	only	-	May	 6	0:00	1:00	D
Rule Halifax	1921	1922	-	Sep	 5	0:00	0	S
Rule Halifax	1922	only	-	Apr	30	0:00	1:00	D
Rule Halifax	1923	1925	-	May	Sun>=1	0:00	1:00	D
Rule Halifax	1923	only	-	Sep	 4	0:00	0	S
Rule Halifax	1924	only	-	Sep	15	0:00	0	S
Rule Halifax	1925	only	-	Sep	28	0:00	0	S
Rule Halifax	1926	only	-	May	16	0:00	1:00	D
Rule Halifax	1926	only	-	Sep	13	0:00	0	S
Rule Halifax	1927	only	-	May	 1	0:00	1:00	D
Rule Halifax	1927	only	-	Sep	26	0:00	0	S
Rule Halifax	1928	1931	-	May	Sun>=8	0:00	1:00	D
Rule Halifax	1928	only	-	Sep	 9	0:00	0	S
Rule Halifax	1929	only	-	Sep	 3	0:00	0	S
Rule Halifax	1930	only	-	Sep	15	0:00	0	S
Rule Halifax	1931	1932	-	Sep	Mon>=24	0:00	0	S
Rule Halifax	1933	only	-	Apr	30	0:00	1:00	D
Rule Halifax	1933	only	-	Oct	 2	0:00	0	S
Rule Halifax	1934	only	-	May	20	0:00	1:00	D
Rule Halifax	1934	only	-	Sep	16	0:00	0	S
Rule Halifax	1935	only	-	Jun	 2	0:00	1:00	D
Rule Halifax	1935	only	-	Sep	30	0:00	0	S
Rule Halifax	1936	only	-	Jun	 1	0:00	1:00	D
Rule Halifax	1936	only	-	Sep	14	0:00	0	S
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	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
Rule Halifax	1962	max	-	Oct	lastSun	2:00	0	S
Rule Halifax	1987	max	-	Apr	Sun>=1	2:00	1:00	D
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Halifax	-4:14:24 -	LMT	1902 Jun 15
			-4:00	Halifax	A%sT

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Mont	1884	only	-	Jan	 1	0:00	0	S
Rule	Mont	1917	only	-	Mar	25	2:00	1:00	D
Rule	Mont	1917	only	-	Apr	24	0:00	0	S
Rule	Mont	1918	only	-	Apr	14	2:00	1:00	D
Rule	Mont	1918	only	-	Oct	31	2:00	0	S
Rule	Mont	1919	only	-	Mar	31	2:30	1:00	D
Rule	Mont	1919	only	-	Oct	25	2:30	0	S
Rule	Mont	1920	only	-	May	 2	2:30	1:00	D
Rule	Mont	1920	only	-	Oct	 3	2:30	0	S
Rule	Mont	1921	only	-	May	 1	2:00	1:00	D
Rule	Mont	1921	only	-	Oct	 2	2:30	0	S
Rule	Mont	1922	only	-	Apr	30	2:00	1:00	D
Rule	Mont	1922	only	-	Oct	 1	2:30	0	S
Rule	Mont	1924	only	-	May	17	2:00	1:00	D
Rule	Mont	1924	1926	-	Sep	lastSun	2:30	0	S
Rule	Mont	1925	1926	-	May	Sun>=1	2:00	1:00	D
Rule	Mont	1927	only	-	May	 1	0:00	1:00	D
Rule	Mont	1927	1932	-	Sep	Sun>=25	0:00	0	S
Rule	Mont	1928	1931	-	Apr	Sun>=25	0:00	1:00	D
Rule	Mont	1932	only	-	May	 1	0:00	1:00	D
Rule	Mont	1933	1940	-	Apr	Sun>=24	0:00	1:00	D
Rule	Mont	1933	only	-	Oct	 1	0:00	0	S
Rule	Mont	1934	1939	-	Sep	Sun>=24	0:00	0	S
Rule	Mont	1945	1948	-	Sep	lastSun	2:00	0	S
Rule	Mont	1946	1986	-	Apr	lastSun	2:00	1:00	D
Rule	Mont	1949	1950	-	Oct	lastSun	2:00	0	S
Rule	Mont	1951	1956	-	Sep	lastSun	2:00	0	S
Rule	Mont	1957	max	-	Oct	lastSun	2:00	0	S
Rule	Mont	1987	max	-	Apr	Sun>=1	2:00	1:00	D
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Montreal	-4:54:16 -	LMT	1884
			-5:00	Mont	E%sT

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Winn	1887	only	-	Jul	16	0:00	0	S
Rule	Winn	1916	only	-	Apr	23	0:00	1:00	D
Rule	Winn	1916	only	-	Sep	17	0:00	0	S
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	23	2:00	0	S
Rule	Winn	1942	only	-	Feb	 9	2:00	1:00	D
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
Rule	Winn	1947	1949	-	Apr	lastSun	2:00	1:00	D
Rule	Winn	1947	1958	-	Sep	lastSun	2:00	0	S
Rule	Winn	1948	only	-	May	 1	2:00	1:00	D
Rule	Winn	1948	1960	-	Apr	lastSun	2:00	1:00	D
Rule	Winn	1959	only	-	Oct	lastSun	2:00	0	S
Rule	Winn	1960	only	-	Sep	lastSun	2:00	0	S
Rule	Winn	1963	only	-	Apr	lastSun	2:00	1:00	D
Rule	Winn	1963	only	-	Sep	lastSun	2:00	0	S
Rule	Winn	1966	1986	-	Apr	lastSun	2:00	1:00	D
Rule	Winn	1966	max	-	Sep	lastSun	2:00	0	S
Rule	Winn	1987	max	-	Apr	Sun>=1	2:00	1:00	D
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Winnipeg	-6:28:36 -	LMT	1887 Jul 16
			-6:00	Winn	C%sT

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Regina	1905	only	-	Sep	 1	0:00	0	S
Rule	Regina	1918	only	-	Apr	14	2:00	1:00	D
Rule	Regina	1918	only	-	Oct	31	2:00	0	S
Rule	Regina	1930	1934	-	May	Sun>=1	0:00	1:00	D
Rule	Regina	1930	1934	-	Oct	Sun>=1	0:00	0	S
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	1945	only	-	Sep	lastSun	2:00	0	S
Rule	Regina	1946	only	-	Apr	14	2:00	1:00	D
Rule	Regina	1946	only	-	Oct	13	2:00	0	S
Rule	Regina	1947	1960	-	Apr	lastSun	2:00	1:00	D
Rule	Regina	1947	1959	-	Sep	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	America/Regina	-6:58:36 -	LMT	1905 Sep
			-7:00	Regina	M%sT	1966 Apr 15
			-6:00	-	CST

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Edm	1906	only	-	Sep	 1	0:00	0	S
Rule	Edm	1918	1919	-	Apr	Sun>=8	2:00	1:00	D
Rule	Edm	1918	only	-	Oct	31	2:00	0	S
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	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
Rule	Edm	1967	only	-	Apr	lastSun	2:00	1:00	D
Rule	Edm	1967	only	-	Oct	lastSun	2:00	0	S
Rule	Edm	1969	only	-	Apr	lastSun	2:00	1:00	D
Rule	Edm	1969	only	-	Oct	lastSun	2:00	0	S
Rule	Edm	1972	1986	-	Apr	lastSun	2:00	1:00	D
Rule	Edm	1972	max	-	Oct	lastSun	2:00	0	S
Rule	Edm	1987	max	-	Apr	Sun>=1	2:00	1:00	D
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Edmonton	-7:33:52 -	LMT	1906 Sep
			-7:00	Edm	M%sT

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Vanc	1884	only	-	Jan	 1	0:00	0	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	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
Rule	Vanc	1947	1961	-	Sep	lastSun	2:00	0	S
Rule	Vanc	1962	max	-	Oct	lastSun	2:00	0	S
Rule	Vanc	1987	max	-	Apr	Sun>=1	2:00	1:00	D
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Vancouver	-8:12:28 -	LMT	1884
			-8:00	Vanc	P%sT

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Yukon	1900	only	-	Jan	 1	0:00	0	S
Rule	Yukon	1918	only	-	Apr	14	2:00	1:00	D
Rule	Yukon	1918	only	-	Oct	27	2:00	0	S
Rule	Yukon	1919	only	-	May	25	2:00	1:00	D
Rule	Yukon	1919	only	-	Nov	 1	0:00	0	S
Rule	Yukon	1942	only	-	Feb	 9	2:00	1:00	D
Rule	Yukon	1965	only	-	Apr	25	0:00	1:00	D
Rule	Yukon	1965	only	-	Oct	31	2:00	0	S
Rule	Yukon	1980	1986	-	Apr	lastSun	2:00	1:00	D
Rule	Yukon	1980	max	-	Oct	lastSun	2:00	0	S
Rule	Yukon	1987	max	-	Apr	Sun>=1	2:00	1:00	D
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Whitehorse	-9:00:12 -	LMT	1900 Aug 20
			-9:00	Yukon	Y%sT	1966 Jul
			-8:00	Yukon	P%sT
# Parts of Yukon (e.g. Dawson) didn't switch to -8:00 until 1973 Oct 28.

###############################################################################

# Mexico

# From Guy Harris:
# 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)."

# From Bob Devine (January 28, 1988):
# The Federal District (where Mexico City is) has observed [DST] several
# times but not recently.
#
# I don't where to drawn the line in the North Baja area.  28th latitude
# sounds good -- but it may be higher (how far [d]o radio stations from
# San Diego affect culture?).
#
# The dates of DST probably go back to 1981.  The rules are the same as
# US's.  This is going to be a headache for US presidential electi[o]n years!

# From Arthur David Olson (February 13, 1988)
# Since the 1981 starting date is only "probable," we'll keep the 1987
# starting date below.

# From U. S. Naval Observatory (January 19, 1989):
# MEXICO BAJA CAL N   7 H  BEHIND UTC    BAJA CALIFORNIA SUR AND
# MEXICO BAJA CAL N                      N. PACIFIC COAST (STATES
# MEXICO BAJA CAL N                      OF SINALOA AND SONORA)
# MEXICO BAJA CAL N   8 H  BEHIND UTC    ABOVE 28TH PARALLAL APR 3
# MEXICO BAJA CAL N                      - OCT 29
# MEXICO BAJA CAL N   7 H  BEHIND UTC    ABOVE 28TH PARALLAL APR 3
# MEXICO BAJA CAL N                      - 0CT 29
# MEXICO              6 H  BEHIND UTC    STATES OF DURANGO,
# MEXICO                                 COAHUILA, NUEVO LEON,
# MEXICO                                 TAMAULIPAS
# MEXICO              5 H  BEHIND UTC    STATES OF DURANGO,
# MEXICO                                 COAHUILA, NUEVO LEON,
# MEXICO                                 TAMAULIPAS  APR 3 - OCT 29
# MEXICO              6 H  BEHIND UTC    GENERAL MEXICO, STATES OF
# MEXICO                                 CAMPECHE, QUINTANA ROO AND
# MEXICO                                 YUCATAN

# From Arthur David Olson (January 21, 1989):
# April 3 fell on a Sunday in 1988; October 29 fell on a Sunday in 1989.  Ahem.
# USNO claims there should be four Mexican zones rather than three:
# a zone that's GMT-8 with DST; a zone that's always GMT-7;
# a zone that's GMT-6 with DST; and a zone that's always GMT-6.

# From Paul Eggert <[e-mail]> (November 18, 1993):
# Shanks also says there are four zones, but disagrees about the fourth.
# Instead of GMT-6 with DST, he says there's GMT-8 without DST.

# From Shanks (1991):
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Mexico	1922	only	-	Jan	1	0:00	0	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	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	BajaN	1950	1966	-	Apr	lastSun	2:00	1:00	D
Rule	BajaN	1950	1961	-	Sep	lastSun	2:00	0	S
Rule	BajaN	1961	1966	-	Oct	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
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
			-6:00	Mexico	C%sT
Zone America/Mazatlan	-7:05:40 -	LMT	1921 Dec 31 23:54:20
			-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
			-6:00	-	CST	1942 Apr
			-7:00	-	MST	1949 Jan 14
			-8:00	-	PST	1970