Update tzdata and zoneinfo to version 2018e.

Author: GitHub Actions

tzdata/Makefile

@@ -21,7 +21,7 @@ DATAFORM=		main
 
 # Change the line below for your time zone (after finding the zone you want in
 # the time zone files, or adding it to a time zone file).
-# Alternately, if you discover you've got the wrong time zone, you can just
+# Alternatively, if you discover you've got the wrong time zone, you can just
 #	zic -l rightzone
 # to correct things.
 # Use the command
@@ -38,7 +38,7 @@ LOCALTIME=	GMT
 # template file are used to determine "spring forward" and "fall back" days and
 # times; the environment variable itself specifies UT offsets of standard and
 # daylight saving time.
-# Alternately, if you discover you've got the wrong time zone, you can just
+# Alternatively, if you discover you've got the wrong time zone, you can just
 #	zic -p rightzone
 # to correct things.
 # Use the command
@@ -236,14 +236,16 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \
   $(GCC_INSTRUMENT) \
   -Wall -Wextra \
   -Walloc-size-larger-than=100000 -Warray-bounds=2 \
-  -Wbad-function-cast -Wcast-align -Wdate-time \
+  -Wbad-function-cast -Wcast-align=strict -Wdate-time \
   -Wdeclaration-after-statement -Wdouble-promotion \
   -Wformat=2 -Wformat-overflow=2 -Wformat-signedness -Wformat-truncation \
   -Winit-self -Wjump-misses-init -Wlogical-op \
   -Wmissing-declarations -Wmissing-prototypes -Wnested-externs \
   -Wold-style-definition -Woverlength-strings -Wpointer-arith \
-  -Wshadow -Wshift-overflow=2 -Wstrict-prototypes -Wstringop-overflow=5 \
+  -Wshadow -Wshift-overflow=2 -Wstrict-prototypes -Wstringop-overflow=4 \
+  -Wstringop-truncation -Wsuggest-attribute=cold \
   -Wsuggest-attribute=const -Wsuggest-attribute=format \
+  -Wsuggest-attribute=malloc \
   -Wsuggest-attribute=noreturn -Wsuggest-attribute=pure \
   -Wtrampolines -Wundef -Wuninitialized -Wunused \
   -Wvariadic-macros -Wvla -Wwrite-strings \
@@ -514,6 +516,7 @@ VERSION_DEPS= \
 		tzfile.5 tzfile.h tzselect.8 tzselect.ksh \
 		workman.sh yearistype.sh \
 		zdump.8 zdump.c zic.8 zic.c \
+		ziguard.awk zishrink.awk \
 		zone.tab zone1970.tab zoneinfo2tdf.pl
 
 # And for the benefit of csh users on systems that assume the user
@@ -559,8 +562,8 @@ version:	$(VERSION_DEPS)
 
 # These files can be tailored by setting BACKWARD, PACKRATDATA, etc.
 vanguard.zi main.zi rearguard.zi: $(DSTDATA_ZI_DEPS)
-		$(AWK) -v outfile='$@' -f ziguard.awk $(TDATA) $(PACKRATDATA) \
-		  >$@.out
+		$(AWK) -v DATAFORM=`expr $@ : '\(.*\).zi'` -f ziguard.awk \
+		  $(TDATA) $(PACKRATDATA) >$@.out
 		mv $@.out $@
 tzdata.zi:	$(DATAFORM).zi version
 		version=`sed 1q version` && \
@@ -900,19 +903,27 @@ check_time_t_alternatives:
 		done
 		rm -fr time_t.dir
 
+TRADITIONAL_ASC = \
+  tzcode$(VERSION).tar.gz.asc \
+  tzdata$(VERSION).tar.gz.asc
+ALL_ASC = $(TRADITIONAL_ASC) \
+  tzdata$(VERSION)-rearguard.tar.gz.asc \
+  tzdb-$(VERSION).tar.lz.asc
+
 tarballs traditional_tarballs signatures traditional_signatures: version
 		VERSION=`cat version` && \
 		$(MAKE) VERSION="$$VERSION" $@_version
 
 # These *_version rules are intended for use if VERSION is set by some
 # other means.  Ordinarily these rules are used only by the above
 # non-_version rules, which set VERSION on the 'make' command line.
-tarballs_version: traditional_tarballs_version tzdb-$(VERSION).tar.lz
+tarballs_version: traditional_tarballs_version \
+  tzdata$(VERSION)-rearguard.tar.gz \
+  tzdb-$(VERSION).tar.lz
 traditional_tarballs_version: \
   tzcode$(VERSION).tar.gz tzdata$(VERSION).tar.gz
-signatures_version: traditional_signatures_version tzdb-$(VERSION).tar.lz.asc
-traditional_signatures_version: \
-  tzcode$(VERSION).tar.gz.asc tzdata$(VERSION).tar.gz.asc \
+signatures_version: $(ALL_ASC)
+traditional_signatures_version: $(TRADITIONAL_ASC)
 
 tzcode$(VERSION).tar.gz: set-timestamps.out
 		LC_ALL=C && export LC_ALL && \
@@ -927,6 +938,26 @@ tzdata$(VERSION).tar.gz: set-timestamps.out
 		  gzip $(GZIPFLAGS) >[email protected]
 		mv [email protected] $@
 
+tzdata$(VERSION)-rearguard.tar.gz: rearguard.zi set-timestamps.out
+		rm -fr tzdata$(VERSION)-rearguard.dir
+		mkdir tzdata$(VERSION)-rearguard.dir
+		ln $(COMMON) $(DATA) $(MISC) tzdata$(VERSION)-rearguard.dir
+		cd tzdata$(VERSION)-rearguard.dir && \
+		  rm -f $(TDATA) $(PACKRATDATA) version
+		for f in $(TDATA) $(PACKRATDATA); do \
+		  rearf=tzdata$(VERSION)-rearguard.dir/$$f; \
+		  $(AWK) -v DATAFORM=rearguard -f ziguard.awk $$f >$$rearf && \
+		  touch -cmr `ls -t ziguard.awk $$f` $$rearf || exit; \
+		done
+		sed '1s/$$/-rearguard/' \
+		  <version >tzdata$(VERSION)-rearguard.dir/version
+		touch -cmr version tzdata$(VERSION)-rearguard.dir/version
+		LC_ALL=C && export LC_ALL && \
+		  (cd tzdata$(VERSION)-rearguard.dir && \
+		   tar $(TARFLAGS) -cf - $(COMMON) $(DATA) $(MISC) | \
+		     gzip $(GZIPFLAGS)) >[email protected]
+		mv [email protected] $@
+
 tzdb-$(VERSION).tar.lz: set-timestamps.out
 		rm -fr tzdb-$(VERSION)
 		mkdir tzdb-$(VERSION)
@@ -937,12 +968,10 @@ tzdb-$(VERSION).tar.lz: set-timestamps.out
 		mv [email protected] $@
 
 tzcode$(VERSION).tar.gz.asc: tzcode$(VERSION).tar.gz
-		gpg --armor --detach-sign $?
-
 tzdata$(VERSION).tar.gz.asc: tzdata$(VERSION).tar.gz
-		gpg --armor --detach-sign $?
-
+tzdata$(VERSION)-rearguard.tar.gz.asc: tzdata$(VERSION)-rearguard.tar.gz
 tzdb-$(VERSION).tar.lz.asc: tzdb-$(VERSION).tar.lz
+$(ALL_ASC):
 		gpg --armor --detach-sign $?
 
 typecheck:

tzdata/NEWS

@@ -1,5 +1,69 @@
 News for the tz database
 
+Release 2018e - 2018-05-01 23:42:51 -0700
+
+  Briefly:
+
+    North Korea switches back to +09 on 2018-05-05.
+    The main format uses negative DST again, for Ireland etc.
+    'make tarballs' now also builds a rearguard tarball.
+    New 's' and 'd' suffixes in SAVE columns of Rule and Zone lines.
+
+  Changes to past and future time stamps
+
+    North Korea switches back from +0830 to +09 on 2018-05-05.
+    (Thanks to Kang Seonghoon, Arthur David Olson, Seo Sanghyeon,
+    and Tim Parenti.)
+
+    Bring back the negative-DST changes of 2018a, except be more
+    compatible with data parsers that do not support negative DST.
+    Also, this now affects historical time stamps in Namibia and the
+    former Czechoslovakia, not just Ireland.  The main format now uses
+    negative DST to model time stamps in Europe/Dublin (from 1971 on),
+    Europe/Prague (1946/7), and Africa/Windhoek (1994/2017).  This
+    does not affect UT offsets, only time zone abbreviations and the
+    tm_isdst flag.  Also, this does not affect rearguard or vanguard
+    formats; effectively the main format now uses vanguard instead of
+    rearguard format.  Data parsers that do not support negative DST
+    can still use data from the rearguard tarball described below.
+
+  Changes to build procedure
+
+    The command 'make tarballs' now also builds the tarball
+    tzdataVERSION-rearguard.tar.gz, which is like tzdataVERSION.tar.gz
+    except that it uses rearguard format intended for trailing-edge
+    data parsers.
+
+  Changes to data format and to code
+
+    The SAVE column of Rule and Zone lines can now have an 's' or 'd'
+    suffix, which specifies whether the adjusted time is standard time
+    or daylight saving time.  If no suffix is given, daylight saving
+    time is used if and only if the SAVE column is nonzero; this is
+    the longstanding behavior.  Although this new feature is not used
+    in tzdata, it could be used to specify the legal time in Namibia
+    1994-2017, as opposed to the popular time (see below).
+
+  Changes to past time stamps
+
+    From 1994 through 2017 Namibia observed DST in winter, not summer.
+    That is, it used negative DST, as Ireland still does.  This change
+    does not affect UTC offsets; it affects only the tm_isdst flag and
+    the abbreviation used during summer, which is now CAT, not WAST.
+    Although (as noted by Michael Deckers) summer and winter time were
+    both simply called "standard time" in Namibian law, in common
+    practice winter time was considered to be DST (as noted by Stephen
+    Colebourne).  The full effect of this change is only in vanguard
+    format; in rearguard and main format, the tm_isdst flag is still
+    zero in winter and nonzero in summer.
+
+    In 1946/7 Czechoslovakia also observed negative DST in winter.
+    The full effect of this change is only in vanguard format; in
+    rearguard and main formats, it is modeled as plain GMT without
+    daylight saving.  Also, the dates of some 1944/5 DST transitions
+    in Czechoslovakia have been changed.
+
+
 Release 2018d - 2018-03-22 07:05:46 -0700
 
   Briefly:
@@ -39,7 +103,7 @@ Release 2018d - 2018-03-22 07:05:46 -0700
     Enderbury and Kiritimati skipped New Year's Eve 1994, not
     New Year's Day 1995.  (Thanks to Kerry Shetline.)
 
-    Fix the 1912-01-01 transition for Portugual and its colonies.
+    Fix the 1912-01-01 transition for Portugal and its colonies.
     This transition was at 00:00 according to the new UT offset, not
     according to the old one.  Also assume that Cape Verde switched on
     the same date as the rest, not in 1907.  This affects

tzdata/africa

@@ -6,7 +6,7 @@
 # [email protected] for general use in the future).  For more, please see
 # the file CONTRIBUTING in the tz distribution.
 
-# From Paul Eggert (2017-02-20):
+# From Paul Eggert (2017-04-09):
 #
 # Unless otherwise specified, the source for data through 1990 is:
 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
@@ -52,7 +52,7 @@
 # cannot now come up with solid citations.
 #
 # I invented the following abbreviations; corrections are welcome!
-#	 +02	WAST	West Africa Summer Time
+#	 +02	WAST	West Africa Summer Time (no longer used)
 #	 +03	CAST	Central Africa Summer Time (no longer used)
 #	 +03	SAST	South Africa Summer Time (no longer used)
 #	 +03	EAT	East Africa Time
@@ -967,6 +967,10 @@ Link Africa/Maputo Africa/Lusaka	# Zambia
 # commence at OOhOO on Monday 21 March 1994 and shall end at 02h00 on
 # Sunday 4 September 1994.
 
+# From Michael Deckers (2017-04-06):
+# ... both summer and winter time are called "standard"
+# (which differs from the use in Ireland) ...
+
 # From Petronella Sibeene (2007-03-30):
 # http://allafrica.com/stories/200703300178.html
 # While the entire country changes its time, Katima Mulilo and other
@@ -992,19 +996,42 @@ Link Africa/Maputo Africa/Lusaka	# Zambia
 # the same time they would normally start DST, the first Sunday in September:
 # https://www.timeanddate.com/news/time/namibia-new-time-zone.html
 
+# From Paul Eggert (2017-04-09):
+# Before the change, summer and winter time were both standard time legally.
+# However in common parlance, winter time was considered to be DST.  See, e.g.:
+# http://www.nbc.na/news/namibias-winter-time-could-be-scrapped.2706
+# https://zone.my.na/news/times-are-changing-in-namibia
+# https://www.newera.com.na/2017/02/23/namibias-winter-time-might-be-repealed/
+# Use plain "WAT" and "CAT" for the time zone abbreviations, to be compatible
+# with Namibia's neighbors.
+
 # RULE	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Namibia	1994	only	-	Mar	21	0:00	0	-
-Rule	Namibia	1994	2016	-	Sep	Sun>=1	2:00	1:00	S
-Rule	Namibia	1995	2017	-	Apr	Sun>=1	2:00	0	-
+# 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
+# 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
+# End of rearguard section.
+
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Africa/Windhoek	1:08:24 -	LMT	1892 Feb 8
 			1:30	-	+0130	1903 Mar
 			2:00	-	SAST	1942 Sep 20  2:00
 			2:00	1:00	SAST	1943 Mar 21  2:00
 			2:00	-	SAST	1990 Mar 21 # independence
-			2:00	-	CAT	1994 Mar 21  0:00
-			1:00	Namibia	WA%sT	2017 Sep  3  2:00
-			2:00	-	CAT
+# Vanguard section, for zic and other parsers that support negative DST.
+			2:00	Namibia	%s
+# Rearguard section, for parsers that do not support negative DST.
+#			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
+# End of rearguard section.
 
 # Niger
 # See Africa/Lagos.

tzdata/asia

@@ -1983,6 +1983,19 @@ Rule	ROK	1987	1988	-	Oct	Sun>=8	3:00	0	S
 # There is no common English-language abbreviation for this time zone.
 # Use KST, as that's what we already use for 1954-1961 in ROK.
 
+# From Kang Seonghoon (2018-04-29):
+# North Korea will revert its time zone from UTC+8:30 (PYT; Pyongyang
+# Time) back to UTC+9 (KST; Korea Standard Time).
+#
+# From Seo Sanghyeon (2018-04-30):
+# Rodong Sinmun 2018-04-30 announced Pyongyang Time transition plan.
+# https://www.nknews.org/kcna/wp-content/uploads/sites/5/2018/04/rodong-2018-04-30.pdf
+# ... the transition date is 2018-05-05 ...  Citation should be Decree
+# No. 2232 of April 30, 2018, of the Presidium of the Supreme People's
+# Assembly, as published in Rodong Sinmun.
+# From Tim Parenti (2018-04-29):
+# It appears to be the front page story at the top in the right-most column.
+
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Seoul	8:27:52	-	LMT	1908 Apr  1
 			8:30	-	KST	1912 Jan  1
@@ -1994,7 +2007,8 @@ Zone	Asia/Pyongyang	8:23:00 -	LMT	1908 Apr  1
 			8:30	-	KST	1912 Jan  1
 			9:00	-	JST	1945 Aug 24
 			9:00	-	KST	2015 Aug 15 00:00
-			8:30	-	KST
+			8:30	-	KST	2018 May  5
+			9:00	-	KST
 
 ###############################################################################
 
@@ -2658,7 +2672,7 @@ Zone	Asia/Karachi	4:28:12 -	LMT	1907
 # From Sharef Mustafa (2018-03-16):
 # Palestine summer time will start on Mar 24th 2018 by advancing the
 # clock by 60 minutes as per Palestinian cabinet decision published on
-# the offical website, though the decree did not specify the exact
+# 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
 #

tzdata/australasia

@@ -1085,6 +1085,15 @@ Zone	Pacific/Wallis	12:15:20 -	LMT	1901
 # (1999-09-27) writes that Giles Meteorological Station uses
 # South Australian time even though it's located in Western Australia.
 
+# From Paul Eggert (2018-04-01):
+# The Guardian Express of Perth, Australia reported today that the
+# government decided to advance the clocks permanently on January 1,
+# 2019, from UT +08 to UT +09.  The article noted that an exemption
+# would be made for people aged 61 and over, who "can apply in writing
+# to have the extra hour of sunshine removed from their area."  See:
+# Daylight saving coming to WA in 2019. Guardian Express. 2018-04-01.
+# https://www.communitynews.com.au/guardian-express/news/exclusive-daylight-savings-coming-wa-summer-2018/
+
 # Queensland
 
 # From Paul Eggert (2018-02-26):