Apply https://unicode.org/cldr/trac/ticket/11972

am: 33c735084a

Change-Id: I43733c2fdff728237dfcdaeddaab63bc6756767d

7 files changed, 129 insertions, 82 deletions

diff --git a/tools/java/org/unicode/cldr/util/data/africa b/tools/java/org/unicode/cldr/util/data/africa
index 0a0f586..4028b0d 100644
--- a/tools/java/org/unicode/cldr/util/data/africa
+++ b/tools/java/org/unicode/cldr/util/data/africa
@@ -364,6 +364,11 @@ Zone	Africa/Cairo	2:05:09 -	LMT	1900 Oct
 # See Africa/Lagos.
 
 # Eritrea
+# See Africa/Nairobi.
+
+# Eswatini (formerly Swaziland)
+# See Africa/Johannesburg.
+
 # Ethiopia
 # See Africa/Nairobi.
 #
@@ -913,7 +918,7 @@ Rule	Morocco	2012	only	-	Aug	20	 2:00	1:00	-
 Rule	Morocco	2012	only	-	Sep	30	 3:00	0	-
 Rule	Morocco	2013	only	-	Jul	 7	 3:00	0	-
 Rule	Morocco	2013	only	-	Aug	10	 2:00	1:00	-
-Rule	Morocco	2013	2018	-	Oct	lastSun	 3:00	0	-
+Rule	Morocco	2013	2017	-	Oct	lastSun	 3:00	0	-
 Rule	Morocco	2014	2018	-	Mar	lastSun	 2:00	1:00	-
 Rule	Morocco	2014	only	-	Jun	28	 3:00	0	-
 Rule	Morocco	2014	only	-	Aug	 2	 2:00	1:00	-
@@ -925,53 +930,53 @@ Rule	Morocco	2017	only	-	May	21	 3:00	0	-
 Rule	Morocco	2017	only	-	Jul	 2	 2:00	1:00	-
 Rule	Morocco	2018	only	-	May	13	 3:00	0	-
 Rule	Morocco	2018	only	-	Jun	17	 2:00	1:00	-
-Rule	Morocco	2019	only	-	May	 5	 3:00	-1:00	-
-Rule	Morocco	2019	only	-	Jun	 9	 2:00	0	-
-Rule	Morocco	2020	only	-	Apr	19	 3:00	-1:00	-
-Rule	Morocco	2020	only	-	May	24	 2:00	0	-
-Rule	Morocco	2021	only	-	Apr	11	 3:00	-1:00	-
-Rule	Morocco	2021	only	-	May	16	 2:00	0	-
-Rule	Morocco	2022	only	-	Mar	27	 3:00	-1:00	-
-Rule	Morocco	2022	only	-	May	 8	 2:00	0	-
-Rule	Morocco	2023	only	-	Mar	19	 3:00	-1:00	-
-Rule	Morocco	2023	only	-	Apr	23	 2:00	0	-
-Rule	Morocco	2024	only	-	Mar	10	 3:00	-1:00	-
-Rule	Morocco	2024	only	-	Apr	14	 2:00	0	-
-Rule	Morocco	2025	only	-	Feb	23	 3:00	-1:00	-
-Rule	Morocco	2025	only	-	Apr	 6	 2:00	0	-
-Rule	Morocco	2026	only	-	Feb	15	 3:00	-1:00	-
-Rule	Morocco	2026	only	-	Mar	22	 2:00	0	-
-Rule	Morocco	2027	only	-	Feb	 7	 3:00	-1:00	-
-Rule	Morocco	2027	only	-	Mar	14	 2:00	0	-
-Rule	Morocco	2028	only	-	Jan	23	 3:00	-1:00	-
-Rule	Morocco	2028	only	-	Feb	27	 2:00	0	-
-Rule	Morocco	2029	only	-	Jan	14	 3:00	-1:00	-
-Rule	Morocco	2029	only	-	Feb	18	 2:00	0	-
-Rule	Morocco	2029	only	-	Dec	30	 3:00	-1:00	-
-Rule	Morocco	2030	only	-	Feb	10	 2:00	0	-
-Rule	Morocco	2030	only	-	Dec	22	 3:00	-1:00	-
-Rule	Morocco	2031	only	-	Jan	26	 2:00	0	-
-Rule	Morocco	2031	only	-	Dec	14	 3:00	-1:00	-
-Rule	Morocco	2032	only	-	Jan	18	 2:00	0	-
-Rule	Morocco	2032	only	-	Nov	28	 3:00	-1:00	-
-Rule	Morocco	2033	only	-	Jan	 9	 2:00	0	-
-Rule	Morocco	2033	only	-	Nov	20	 3:00	-1:00	-
-Rule	Morocco	2033	only	-	Dec	25	 2:00	0	-
-Rule	Morocco	2034	only	-	Nov	 5	 3:00	-1:00	-
-Rule	Morocco	2034	only	-	Dec	17	 2:00	0	-
-Rule	Morocco	2035	only	-	Oct	28	 3:00	-1:00	-
-Rule	Morocco	2035	only	-	Dec	 2	 2:00	0	-
-Rule	Morocco	2036	only	-	Oct	19	 3:00	-1:00	-
-Rule	Morocco	2036	only	-	Nov	23	 2:00	0	-
-Rule	Morocco	2037	only	-	Oct	 4	 3:00	-1:00	-
-Rule	Morocco	2037	only	-	Nov	15	 2:00	0	-
+Rule	Morocco	2019	only	-	May	 5	 3:00	0	-
+Rule	Morocco	2019	only	-	Jun	 9	 2:00	1:00	-
+Rule	Morocco	2020	only	-	Apr	19	 3:00	0	-
+Rule	Morocco	2020	only	-	May	24	 2:00	1:00	-
+Rule	Morocco	2021	only	-	Apr	11	 3:00	0	-
+Rule	Morocco	2021	only	-	May	16	 2:00	1:00	-
+Rule	Morocco	2022	only	-	Mar	27	 3:00	0	-
+Rule	Morocco	2022	only	-	May	 8	 2:00	1:00	-
+Rule	Morocco	2023	only	-	Mar	19	 3:00	0	-
+Rule	Morocco	2023	only	-	Apr	23	 2:00	1:00	-
+Rule	Morocco	2024	only	-	Mar	10	 3:00	0	-
+Rule	Morocco	2024	only	-	Apr	14	 2:00	1:00	-
+Rule	Morocco	2025	only	-	Feb	23	 3:00	0	-
+Rule	Morocco	2025	only	-	Apr	 6	 2:00	1:00	-
+Rule	Morocco	2026	only	-	Feb	15	 3:00	0	-
+Rule	Morocco	2026	only	-	Mar	22	 2:00	1:00	-
+Rule	Morocco	2027	only	-	Feb	 7	 3:00	0	-
+Rule	Morocco	2027	only	-	Mar	14	 2:00	1:00	-
+Rule	Morocco	2028	only	-	Jan	23	 3:00	0	-
+Rule	Morocco	2028	only	-	Feb	27	 2:00	1:00	-
+Rule	Morocco	2029	only	-	Jan	14	 3:00	0	-
+Rule	Morocco	2029	only	-	Feb	18	 2:00	1:00	-
+Rule	Morocco	2029	only	-	Dec	30	 3:00	0	-
+Rule	Morocco	2030	only	-	Feb	10	 2:00	1:00	-
+Rule	Morocco	2030	only	-	Dec	22	 3:00	0	-
+Rule	Morocco	2031	only	-	Jan	26	 2:00	1:00	-
+Rule	Morocco	2031	only	-	Dec	14	 3:00	0	-
+Rule	Morocco	2032	only	-	Jan	18	 2:00	1:00	-
+Rule	Morocco	2032	only	-	Nov	28	 3:00	0	-
+Rule	Morocco	2033	only	-	Jan	 9	 2:00	1:00	-
+Rule	Morocco	2033	only	-	Nov	20	 3:00	0	-
+Rule	Morocco	2033	only	-	Dec	25	 2:00	1:00	-
+Rule	Morocco	2034	only	-	Nov	 5	 3:00	0	-
+Rule	Morocco	2034	only	-	Dec	17	 2:00	1:00	-
+Rule	Morocco	2035	only	-	Oct	28	 3:00	0	-
+Rule	Morocco	2035	only	-	Dec	 2	 2:00	1:00	-
+Rule	Morocco	2036	only	-	Oct	19	 3:00	0	-
+Rule	Morocco	2036	only	-	Nov	23	 2:00	1:00	-
+Rule	Morocco	2037	only	-	Oct	 4	 3:00	0	-
+Rule	Morocco	2037	only	-	Nov	15	 2:00	1:00	-
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone Africa/Casablanca	-0:30:20 -	LMT	1913 Oct 26
 			 0:00	Morocco	+00/+01	1984 Mar 16
 			 1:00	-	+01	1986
 			 0:00	Morocco	+00/+01	2018 Oct 28  3:00
-			 1:00	Morocco	+01/+00
+			 0:00	Morocco	+00/+01
 
 # Western Sahara
 #
@@ -987,7 +992,7 @@ Zone Africa/Casablanca	-0:30:20 -	LMT	1913 Oct 26
 Zone Africa/El_Aaiun	-0:52:48 -	LMT	1934 Jan # El Aaiún
 			-1:00	-	-01	1976 Apr 14
 			 0:00	Morocco	+00/+01	2018 Oct 28  3:00
-			 1:00	Morocco	+01/+00
+			 0:00	Morocco	+00/+01
 
 # Mozambique
 #
@@ -1059,13 +1064,13 @@ Link Africa/Maputo Africa/Lusaka	# Zambia
 
 # RULE	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 # Vanguard section, for zic and other parsers that support negative DST.
-Rule	Namibia	1994	only	-	Mar	21	0:00	-1:00	WAT
-Rule	Namibia	1994	2017	-	Sep	Sun>=1	2:00	0	CAT
-Rule	Namibia	1995	2017	-	Apr	Sun>=1	2:00	-1:00	WAT
+#Rule	Namibia	1994	only	-	Mar	21	0:00	-1:00	WAT
+#Rule	Namibia	1994	2017	-	Sep	Sun>=1	2:00	0	CAT
+#Rule	Namibia	1995	2017	-	Apr	Sun>=1	2:00	-1:00	WAT
 # Rearguard section, for parsers that do not support negative DST.
-#Rule	Namibia	1994	only	-	Mar	21	0:00	0	WAT
-#Rule	Namibia	1994	2017	-	Sep	Sun>=1	2:00	1:00	CAT
-#Rule	Namibia	1995	2017	-	Apr	Sun>=1	2:00	0	WAT
+Rule	Namibia	1994	only	-	Mar	21	0:00	0	WAT
+Rule	Namibia	1994	2017	-	Sep	Sun>=1	2:00	1:00	CAT
+Rule	Namibia	1995	2017	-	Apr	Sun>=1	2:00	0	WAT
 # End of rearguard section.
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -1075,14 +1080,14 @@ Zone	Africa/Windhoek	1:08:24 -	LMT	1892 Feb 8
 			2:00	1:00	SAST	1943 Mar 21  2:00
 			2:00	-	SAST	1990 Mar 21 # independence
 # Vanguard section, for zic and other parsers that support negative DST.
-			2:00	Namibia	%s
+#			2:00	Namibia	%s
 # Rearguard section, for parsers that do not support negative DST.
-#			2:00	-	CAT	1994 Mar 21  0:00
+			2:00	-	CAT	1994 Mar 21  0:00
 # From Paul Eggert (2017-04-07):
 # The official date of the 2017 rule change was 2017-10-24.  See:
 # http://www.lac.org.na/laws/annoSTAT/Namibian%20Time%20Act%209%20of%202017.pdf
-#			1:00	Namibia	%s	2017 Oct 24
-#			2:00	-	CAT
+			1:00	Namibia	%s	2017 Oct 24
+			2:00	-	CAT
 # End of rearguard section.
 
 # Niger
@@ -1188,7 +1193,7 @@ Zone Africa/Johannesburg 1:52:00 -	LMT	1892 Feb 8
 			1:30	-	SAST	1903 Mar
 			2:00	SA	SAST
 Link Africa/Johannesburg Africa/Maseru	   # Lesotho
-Link Africa/Johannesburg Africa/Mbabane    # Swaziland
+Link Africa/Johannesburg Africa/Mbabane    # Eswatini
 #
 # Marion and Prince Edward Is
 # scientific station since 1947
@@ -1230,9 +1235,6 @@ Zone	Africa/Juba	2:06:28 -	LMT	1931
 			2:00	Sudan	CA%sT	2000 Jan 15 12:00
 			3:00	-	EAT
 
-# Swaziland
-# See Africa/Johannesburg.
-
 # Tanzania
 # See Africa/Nairobi.
 
diff --git a/tools/java/org/unicode/cldr/util/data/asia b/tools/java/org/unicode/cldr/util/data/asia
index 3165203..90a6d0a 100644
--- a/tools/java/org/unicode/cldr/util/data/asia
+++ b/tools/java/org/unicode/cldr/util/data/asia
@@ -1620,6 +1620,24 @@ Rule	Zion	1974	only	-	Jul	 7	0:00	1:00	D
 Rule	Zion	1974	only	-	Oct	13	0:00	0	S
 Rule	Zion	1975	only	-	Apr	20	0:00	1:00	D
 Rule	Zion	1975	only	-	Aug	31	0:00	0	S
+
+# From Alois Treindl (2019-03-06):
+# http://www.moin.gov.il/Documents/שעון קיץ/clock-50-years-7-2014.pdf
+# From Isaac Starkman (2019-03-06):
+# Summer time was in that period in 1980 and 1984, see
+# https://www.ynet.co.il/articles/0,7340,L-3951073,00.html
+# You can of course read it in translation.
+# I checked the local newspapers for that years.
+# It started on midnight and end at 01.00 am.
+# From Paul Eggert (2019-03-06):
+# Also see this thread about the moin.gov.il URL:
+# https://mm.icann.org/pipermail/tz/2018-November/027194.html
+Rule	Zion	1980	only	-	Aug	 2	0:00	1:00	D
+Rule	Zion	1980	only	-	Sep	13	1:00	0	S
+Rule	Zion	1984	only	-	May	 5	0:00	1:00	D
+Rule	Zion	1984	only	-	Aug	25	1:00	0	S
+
+# From Shanks & Pottenger:
 Rule	Zion	1985	only	-	Apr	14	0:00	1:00	D
 Rule	Zion	1985	only	-	Sep	15	0:00	0	S
 Rule	Zion	1986	only	-	May	18	0:00	1:00	D
@@ -1840,7 +1858,7 @@ Zone	Asia/Jerusalem	2:20:54 -	LMT	1880
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Japan	1948	only	-	May	Sat>=1	24:00	1:00	D
-Rule	Japan	1948	1951	-	Sep	Sat>=8	25:00	0	S
+Rule	Japan	1948	1951	-	Sep	Sun>=9	 1:00	0	S
 Rule	Japan	1949	only	-	Apr	Sat>=1	24:00	1:00	D
 Rule	Japan	1950	1951	-	May	Sat>=1	24:00	1:00	D
 
@@ -3071,9 +3089,15 @@ Zone	Asia/Karachi	4:28:12 -	LMT	1907
 # the official website, though the decree did not specify the exact
 # time of the time shift.
 # http://www.palestinecabinet.gov.ps/Website/AR/NDecrees/ViewFile.ashx?ID=e7a42ab7-ee23-435a-b9c8-a4f7e81f3817
+
+# From Even Scharning (2019-03-23):
+# DST in Palestine will start on 30 March this year, not 23 March as the time
+# zone database predicted.
+# https://ramallah.news/post/123610
 #
-# From Paul Eggert (2018-03-16):
-# For 2016 on, predict spring transitions on March's fourth Saturday at 01:00.
+# From Tim Parenti (2019-03-23):
+# Combining this with the rules observed since 2016, adjust our spring
+# transition guess to Mar Sat>=24.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule EgyptAsia	1957	only	-	May	10	0:00	1:00	S
@@ -3104,7 +3128,7 @@ Rule Palestine	2012	only	-	Sep	21	1:00	0	-
 Rule Palestine	2013	only	-	Sep	Fri>=21	0:00	0	-
 Rule Palestine	2014	2015	-	Oct	Fri>=21	0:00	0	-
 Rule Palestine	2015	only	-	Mar	lastFri	24:00	1:00	S
-Rule Palestine	2016	max	-	Mar	Sat>=22	1:00	1:00	S
+Rule Palestine	2016	max	-	Mar	Sat>=24	1:00	1:00	S
 Rule Palestine	2016	max	-	Oct	lastSat	1:00	0	-
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -3596,5 +3620,17 @@ Zone Asia/Ho_Chi_Minh	7:06:40 -	LMT	1906 Jul  1
 			8:00	-	+08	1975 Jun 13
 			7:00	-	+07
 
+# From Paul Eggert (2019-02-19):
+#
+# The Ho Chi Minh entry suffices for most purposes as it agrees with all of
+# Vietnam since 1975-06-13.  Presumably clocks often changed in south Vietnam
+# in the early 1970s as locations changed hands during the war; however the
+# details are unknown and would likely be too voluminous for this database.
+#
+# For timestamps in north Vietnam back to 1970 (the tzdb cutoff),
+# use Asia/Bangkok; see the VN entries in the file zone1970.tab.
+# For timestamps before 1970, see Asia/Hanoi in the file 'backzone'.
+
+
 # Yemen
 # See Asia/Riyadh.
diff --git a/tools/java/org/unicode/cldr/util/data/backward b/tools/java/org/unicode/cldr/util/data/backward
index 51e10f4..b4ae3cf 100644
--- a/tools/java/org/unicode/cldr/util/data/backward
+++ b/tools/java/org/unicode/cldr/util/data/backward
@@ -77,6 +77,7 @@ Link	Pacific/Easter		Chile/EasterIsland
 Link	America/Havana		Cuba
 Link	Africa/Cairo		Egypt
 Link	Europe/Dublin		Eire
+Link	Etc/UTC			Etc/UCT
 Link	Europe/London		Europe/Belfast
 Link	Europe/Chisinau		Europe/Tiraspol
 Link	Europe/London		GB
@@ -111,7 +112,7 @@ Link	Asia/Taipei		ROC
 Link	Asia/Seoul		ROK
 Link	Asia/Singapore		Singapore
 Link	Europe/Istanbul		Turkey
-Link	Etc/UCT			UCT
+Link	Etc/UTC			UCT
 Link	America/Anchorage	US/Alaska
 Link	America/Adak		US/Aleutian
 Link	America/Phoenix		US/Arizona
diff --git a/tools/java/org/unicode/cldr/util/data/etcetera b/tools/java/org/unicode/cldr/util/data/etcetera
index 91ded93..a1606bd 100644
--- a/tools/java/org/unicode/cldr/util/data/etcetera
+++ b/tools/java/org/unicode/cldr/util/data/etcetera
@@ -19,7 +19,6 @@
 
 Zone	Etc/GMT		0	-	GMT
 Zone	Etc/UTC		0	-	UTC
-Zone	Etc/UCT		0	-	UCT
 
 # The following link uses older naming conventions,
 # but it belongs here, not in the file 'backward',
diff --git a/tools/java/org/unicode/cldr/util/data/europe b/tools/java/org/unicode/cldr/util/data/europe
index 587f7b0..2728fac 100644
--- a/tools/java/org/unicode/cldr/util/data/europe
+++ b/tools/java/org/unicode/cldr/util/data/europe
@@ -530,13 +530,13 @@ Link	Europe/London	Europe/Isle_of_Man
 # summer and negative daylight saving time in winter.  It is for when
 # negative SAVE values are used.
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Eire	1971	only	-	Oct	31	 2:00u	-1:00	-
-Rule	Eire	1972	1980	-	Mar	Sun>=16	 2:00u	0	-
-Rule	Eire	1972	1980	-	Oct	Sun>=23	 2:00u	-1:00	-
-Rule	Eire	1981	max	-	Mar	lastSun	 1:00u	0	-
-Rule	Eire	1981	1989	-	Oct	Sun>=23	 1:00u	-1:00	-
-Rule	Eire	1990	1995	-	Oct	Sun>=22	 1:00u	-1:00	-
-Rule	Eire	1996	max	-	Oct	lastSun	 1:00u	-1:00	-
+#Rule	Eire	1971	only	-	Oct	31	 2:00u	-1:00	-
+#Rule	Eire	1972	1980	-	Mar	Sun>=16	 2:00u	0	-
+#Rule	Eire	1972	1980	-	Oct	Sun>=23	 2:00u	-1:00	-
+#Rule	Eire	1981	max	-	Mar	lastSun	 1:00u	0	-
+#Rule	Eire	1981	1989	-	Oct	Sun>=23	 1:00u	-1:00	-
+#Rule	Eire	1990	1995	-	Oct	Sun>=22	 1:00u	-1:00	-
+#Rule	Eire	1996	max	-	Oct	lastSun	 1:00u	-1:00	-
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Europe/Dublin	-0:25:00 -	LMT	1880 Aug  2
@@ -550,11 +550,11 @@ Zone	Europe/Dublin	-0:25:00 -	LMT	1880 Aug  2
 			 0:00	-	GMT	1948 Apr 18  2:00s
 			 0:00	GB-Eire	GMT/IST	1968 Oct 27
 # The next line is for when negative SAVE values are used.
-			 1:00	Eire	IST/GMT
+#			 1:00	Eire	IST/GMT
 # These three lines are for when SAVE values are always nonnegative.
-#			 1:00	-	IST	1971 Oct 31  2:00u
-#			 0:00	GB-Eire	GMT/IST	1996
-#			 0:00	EU	GMT/IST
+			 1:00	-	IST	1971 Oct 31  2:00u
+			 0:00	GB-Eire	GMT/IST	1996
+			 0:00	EU	GMT/IST
 
 
 ###############################################################################
@@ -992,9 +992,9 @@ Zone	Europe/Prague	0:57:44 -	LMT	1850
 			1:00	C-Eur	CE%sT	1945 May  9
 			1:00	Czech	CE%sT	1946 Dec  1  3:00
 # Vanguard section, for zic and other parsers that support negative DST.
-			1:00	-1:00	GMT	1947 Feb 23  2:00
+#			1:00	-1:00	GMT	1947 Feb 23  2:00
 # Rearguard section, for parsers that do not support negative DST.
-#			0:00	-	GMT	1947 Feb 23  2:00
+			0:00	-	GMT	1947 Feb 23  2:00
 # End of rearguard section.
 			1:00	Czech	CE%sT	1979
 			1:00	EU	CE%sT
@@ -1855,7 +1855,7 @@ Zone Europe/Luxembourg	0:24:36 -	LMT	1904 Jun
 			1:00	Belgium	CE%sT	1977
 			1:00	EU	CE%sT
 
-# Macedonia
+# North Macedonia
 # See Europe/Belgrade.
 
 # Malta
@@ -3359,7 +3359,7 @@ Zone	Europe/Belgrade	1:22:00	-	LMT	1884
 Link Europe/Belgrade Europe/Ljubljana	# Slovenia
 Link Europe/Belgrade Europe/Podgorica	# Montenegro
 Link Europe/Belgrade Europe/Sarajevo	# Bosnia and Herzegovina
-Link Europe/Belgrade Europe/Skopje	# Macedonia
+Link Europe/Belgrade Europe/Skopje	# North Macedonia
 Link Europe/Belgrade Europe/Zagreb	# Croatia
 
 # Slovakia
diff --git a/tools/java/org/unicode/cldr/util/data/leapseconds b/tools/java/org/unicode/cldr/util/data/leapseconds
index 325f3a1..886ae27 100644
--- a/tools/java/org/unicode/cldr/util/data/leapseconds
+++ b/tools/java/org/unicode/cldr/util/data/leapseconds
@@ -63,7 +63,7 @@ Leap	2016	Dec	31	23:59:60	+	S
 
 # POSIX timestamps for the data in this file:
 #updated 1467936000
-#expires 1561680000
+#expires 1577491200
 
-#	Updated through IERS Bulletin C56
-#	File expires on:  28 June 2019
+#	Updated through IERS Bulletin C57
+#	File expires on:  28 December 2019
diff --git a/tools/java/org/unicode/cldr/util/data/northamerica b/tools/java/org/unicode/cldr/util/data/northamerica
index faaf979..eee8de0 100644
--- a/tools/java/org/unicode/cldr/util/data/northamerica
+++ b/tools/java/org/unicode/cldr/util/data/northamerica
@@ -609,6 +609,15 @@ Zone America/Los_Angeles -7:52:58 -	LMT	1883 Nov 18 12:07:02
 # In a 2018-12-11 special election, Metlakatla voted to go back to
 # Alaska time (including daylight saving time) starting next year.
 # https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/
+#
+# From Ryan Stanley (2019-01-11):
+# The community will be changing back on the 20th of this month...
+# From Tim Parenti (2019-01-11):
+# Per an announcement on the Metlakatla community's official Facebook page, the
+# "fall back" will be on Sunday 2019-01-20 at 02:00:
+# https://www.facebook.com/141055983004923/photos/607150969728753/
+# So they won't be waiting for Alaska to join them on 2019-03-10, but will
+# rather change their clocks twice in seven weeks.
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone America/Juneau	 15:02:19 -	LMT	1867 Oct 19 15:33:32
@@ -637,7 +646,7 @@ Zone America/Metlakatla	 15:13:42 -	LMT	1867 Oct 19 15:44:55
 			 -8:00	US	P%sT	1983 Oct 30  2:00
 			 -8:00	-	PST	2015 Nov  1  2:00
 			 -9:00	US	AK%sT	2018 Nov  4  2:00
-			 -8:00	-	PST	2019 Mar Sun>=8 3:00
+			 -8:00	-	PST	2019 Jan 20  2:00
 			 -9:00	US	AK%sT
 Zone America/Yakutat	 14:41:05 -	LMT	1867 Oct 19 15:12:18
 			 -9:18:55 -	LMT	1900 Aug 20 12:00