Update tzdata to version 2026c

NEWS.md

@@ -1,19 +1,34 @@
-# Version 2026.2
-Upstream version 2026b released 2026-04-23T06:06:43+00:00
+# Version 2026.3
+Upstream version 2026c released 2026-07-08T17:23:58+00:00
 
 ## Briefly:
 
-British Columbia moved to permanent -07 on 2026-03-09. Some more overflow bugs
-have been fixed in zic.
+Alberta moved to permanent -06 on 2026-06-18. Morocco moves to permanent +00 on
+2026-09-20. More integer overflow bugs have been fixed in zic.
 
 ## Changes to future timestamps
 
-British Columbia’s 2026-03-08 spring forward was its last foreseeable clock
-change, as it moved to permanent -07 thereafter. (Thanks to Arthur David Olson.)
-Although the change to permanent -07 legally took place on 2026-03-09,
-temporarily model the change to occur on 2026-11-01 at 02:00 instead.  This
-works around a limitation in CLDR v48.2 (2026-03-17).  This temporary hack is
-planned to be removed after CLDR is fixed.
+Alberta’s 2026-03-08 spring forward was its last foreseeable clock change, as it
+moved to permanent -06 thereafter.  (Thanks to Roozbeh Pournader and others.)
+Model this with its traditional abbreviation CST.  Although the change to
+permanent -06 legally took place on 2026-06-18, temporarily model the change to
+occur on 2026-11-01 at 02:00 instead, for the same reason we introduced a
+similarly temporary hack for British Columbia in 2026b.
+
+Although another TZDB release will likely be needed soon because Northwest
+Territories will likely follow Alberta, the legal formalities have not yet taken
+place.
+
+Morocco plans to move back to permanent UTC, without daylight saving time
+transitions, on 2026-09-20 at 02:00.  This also affects Western Sahara.
+
+## Changes to commentary
+
+Northwest Territories is expected to move to permanent -06 prior to 2026-11-01
+02:00, when clocks would otherwise fall back.  (Thanks to Tim Parenti and James
+Bellaire.)  Model this with its traditional abbreviation CST.  Unfortunately the
+change is not yet official, so it is currently present only as comments that can
+be uncommented as needed.
 
 ---
 

VERSION

@@ -1 +1 @@
-2026.2
+2026.3rc0

news.d/2026c.md

@@ -0,0 +1,31 @@
+# Version 2026.3
+Upstream version 2026c released 2026-07-08T17:23:58+00:00
+
+## Briefly:
+
+Alberta moved to permanent -06 on 2026-06-18. Morocco moves to permanent +00 on
+2026-09-20. More integer overflow bugs have been fixed in zic.
+
+## Changes to future timestamps
+
+Alberta’s 2026-03-08 spring forward was its last foreseeable clock change, as it
+moved to permanent -06 thereafter.  (Thanks to Roozbeh Pournader and others.)
+Model this with its traditional abbreviation CST.  Although the change to
+permanent -06 legally took place on 2026-06-18, temporarily model the change to
+occur on 2026-11-01 at 02:00 instead, for the same reason we introduced a
+similarly temporary hack for British Columbia in 2026b.
+
+Although another TZDB release will likely be needed soon because Northwest
+Territories will likely follow Alberta, the legal formalities have not yet taken
+place.
+
+Morocco plans to move back to permanent UTC, without daylight saving time
+transitions, on 2026-09-20 at 02:00.  This also affects Western Sahara.
+
+## Changes to commentary
+
+Northwest Territories is expected to move to permanent -06 prior to 2026-11-01
+02:00, when clocks would otherwise fall back.  (Thanks to Tim Parenti and James
+Bellaire.)  Model this with its traditional abbreviation CST.  Unfortunately the
+change is not yet official, so it is currently present only as comments that can
+be uncommented as needed.

src/tzdata/__init__.py

@@ -1,6 +1,6 @@
 # IANA versions like 2020a are not valid PEP 440 identifiers; the recommended
 # way to translate the version is to use YYYY.n where `n` is a 0-based index.
-__version__ = "2026.2"
+__version__ = "2026.3rc0"
 
 # This exposes the original IANA version number.
-IANA_VERSION = "2026b"
+IANA_VERSION = "2026c"

src/tzdata/zoneinfo/leapseconds

@@ -70,7 +70,7 @@ Leap	2016	Dec	31	23:59:60	+	S
 # Any additional leap seconds will come after this.
 # This Expires line is commented out for now,
 # so that pre-2020a zic implementations do not reject this file.
-#Expires 2026	Dec	28	00:00:00
+#Expires 2027	Jun	28	00:00:00
 
 # Here are POSIX timestamps for the data in this file.
 # "#updated" gives the last time the leap seconds data changed
@@ -79,8 +79,8 @@ Leap	2016	Dec	31	23:59:60	+	S
 # "#expires" gives the first time this file might be wrong;
 # if this file was derived from the IERS leap-seconds.list,
 # this is typically a bit less than one year after "updated".
-#updated 1767698058 (2026-01-06 11:14:18 UTC)
-#expires 1798416000 (2026-12-28 00:00:00 UTC)
+#updated 1783323897 (2026-07-06 07:44:57 UTC)
+#expires 1814140800 (2027-06-28 00:00:00 UTC)
 
 #	Updated through IERS Bulletin C (https://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat)
-#	File expires on 28 December 2026
+#	File expires on 28 June 2027

src/tzdata/zoneinfo/tzdata.zi

@@ -1,4 +1,4 @@
-# version 2026b-dirty
+# version 2026c
 # redo posix_only
 # This zic input file is in the public domain.
 R d 1916 o - Jun 14 23s 1 S
@@ -135,132 +135,6 @@ R M 2025 o - F 23 3 -1 -
 R M 2025 o - Ap 6 2 0 -
 R M 2026 o - F 15 3 -1 -
 R M 2026 o - Mar 22 2 0 -
-R M 2027 o - F 7 3 -1 -
-R M 2027 o - Mar 14 2 0 -
-R M 2028 o - Ja 23 3 -1 -
-R M 2028 o - Mar 5 2 0 -
-R M 2029 o - Ja 14 3 -1 -
-R M 2029 o - F 18 2 0 -
-R M 2029 o - D 30 3 -1 -
-R M 2030 o - F 10 2 0 -
-R M 2030 o - D 22 3 -1 -
-R M 2031 o - Ja 26 2 0 -
-R M 2031 o - D 14 3 -1 -
-R M 2032 o - Ja 18 2 0 -
-R M 2032 o - N 28 3 -1 -
-R M 2033 o - Ja 9 2 0 -
-R M 2033 o - N 20 3 -1 -
-R M 2033 o - D 25 2 0 -
-R M 2034 o - N 5 3 -1 -
-R M 2034 o - D 17 2 0 -
-R M 2035 o - O 28 3 -1 -
-R M 2035 o - D 9 2 0 -
-R M 2036 o - O 19 3 -1 -
-R M 2036 o - N 23 2 0 -
-R M 2037 o - O 4 3 -1 -
-R M 2037 o - N 15 2 0 -
-R M 2038 o - S 26 3 -1 -
-R M 2038 o - O 31 2 0 -
-R M 2039 o - S 18 3 -1 -
-R M 2039 o - O 23 2 0 -
-R M 2040 o - S 2 3 -1 -
-R M 2040 o - O 14 2 0 -
-R M 2041 o - Au 25 3 -1 -
-R M 2041 o - S 29 2 0 -
-R M 2042 o - Au 10 3 -1 -
-R M 2042 o - S 21 2 0 -
-R M 2043 o - Au 2 3 -1 -
-R M 2043 o - S 13 2 0 -
-R M 2044 o - Jul 24 3 -1 -
-R M 2044 o - Au 28 2 0 -
-R M 2045 o - Jul 9 3 -1 -
-R M 2045 o - Au 20 2 0 -
-R M 2046 o - Jul 1 3 -1 -
-R M 2046 o - Au 5 2 0 -
-R M 2047 o - Jun 23 3 -1 -
-R M 2047 o - Jul 28 2 0 -
-R M 2048 o - Jun 7 3 -1 -
-R M 2048 o - Jul 19 2 0 -
-R M 2049 o - May 30 3 -1 -
-R M 2049 o - Jul 4 2 0 -
-R M 2050 o - May 15 3 -1 -
-R M 2050 o - Jun 26 2 0 -
-R M 2051 o - May 7 3 -1 -
-R M 2051 o - Jun 18 2 0 -
-R M 2052 o - Ap 28 3 -1 -
-R M 2052 o - Jun 2 2 0 -
-R M 2053 o - Ap 13 3 -1 -
-R M 2053 o - May 25 2 0 -
-R M 2054 o - Ap 5 3 -1 -
-R M 2054 o - May 10 2 0 -
-R M 2055 o - Mar 28 3 -1 -
-R M 2055 o - May 2 2 0 -
-R M 2056 o - Mar 12 3 -1 -
-R M 2056 o - Ap 23 2 0 -
-R M 2057 o - Mar 4 3 -1 -
-R M 2057 o - Ap 8 2 0 -
-R M 2058 o - F 17 3 -1 -
-R M 2058 o - Mar 31 2 0 -
-R M 2059 o - F 9 3 -1 -
-R M 2059 o - Mar 23 2 0 -
-R M 2060 o - F 1 3 -1 -
-R M 2060 o - Mar 7 2 0 -
-R M 2061 o - Ja 16 3 -1 -
-R M 2061 o - F 27 2 0 -
-R M 2062 o - Ja 8 3 -1 -
-R M 2062 o - F 12 2 0 -
-R M 2062 o - D 31 3 -1 -
-R M 2063 o - F 4 2 0 -
-R M 2063 o - D 16 3 -1 -
-R M 2064 o - Ja 27 2 0 -
-R M 2064 o - D 7 3 -1 -
-R M 2065 o - Ja 11 2 0 -
-R M 2065 o - N 22 3 -1 -
-R M 2066 o - Ja 3 2 0 -
-R M 2066 o - N 14 3 -1 -
-R M 2066 o - D 26 2 0 -
-R M 2067 o - N 6 3 -1 -
-R M 2067 o - D 11 2 0 -
-R M 2068 o - O 21 3 -1 -
-R M 2068 o - D 2 2 0 -
-R M 2069 o - O 13 3 -1 -
-R M 2069 o - N 17 2 0 -
-R M 2070 o - O 5 3 -1 -
-R M 2070 o - N 9 2 0 -
-R M 2071 o - S 20 3 -1 -
-R M 2071 o - N 1 2 0 -
-R M 2072 o - S 11 3 -1 -
-R M 2072 o - O 16 2 0 -
-R M 2073 o - Au 27 3 -1 -
-R M 2073 o - O 8 2 0 -
-R M 2074 o - Au 19 3 -1 -
-R M 2074 o - S 30 2 0 -
-R M 2075 o - Au 11 3 -1 -
-R M 2075 o - S 15 2 0 -
-R M 2076 o - Jul 26 3 -1 -
-R M 2076 o - S 6 2 0 -
-R M 2077 o - Jul 18 3 -1 -
-R M 2077 o - Au 22 2 0 -
-R M 2078 o - Jul 10 3 -1 -
-R M 2078 o - Au 14 2 0 -
-R M 2079 o - Jun 25 3 -1 -
-R M 2079 o - Au 6 2 0 -
-R M 2080 o - Jun 16 3 -1 -
-R M 2080 o - Jul 21 2 0 -
-R M 2081 o - Jun 1 3 -1 -
-R M 2081 o - Jul 13 2 0 -
-R M 2082 o - May 24 3 -1 -
-R M 2082 o - Jun 28 2 0 -
-R M 2083 o - May 16 3 -1 -
-R M 2083 o - Jun 20 2 0 -
-R M 2084 o - Ap 30 3 -1 -
-R M 2084 o - Jun 11 2 0 -
-R M 2085 o - Ap 22 3 -1 -
-R M 2085 o - May 27 2 0 -
-R M 2086 o - Ap 14 3 -1 -
-R M 2086 o - May 19 2 0 -
-R M 2087 o - Mar 30 3 -1 -
-R M 2087 o - May 11 2 0 -
 R NA 1994 o - Mar 21 0 -1 WAT
 R NA 1994 2017 - S Su>=1 2 0 CAT
 R NA 1995 2017 - Ap Su>=1 2 -1 WAT
@@ -2106,7 +1980,8 @@ Z Africa/Casablanca -0:30:20 - LMT 1913 O 26
 0 M %z 1984 Mar 16
 1 - %z 1986
 0 M %z 2018 O 28 3
-1 M %z
+1 M %z 2026 S 20 2
+0 - %z
 Z Africa/Ceuta -0:21:16 - LMT 1901 Ja 1 0u
 0 - WET 1918 May 6 23
 0 1 WEST 1918 O 7 23
@@ -2119,7 +1994,8 @@ Z Africa/Ceuta -0:21:16 - LMT 1901 Ja 1 0u
 Z Africa/El_Aaiun -0:52:48 - LMT 1934
 -1 - %z 1976 Ap 14
 0 M %z 2018 O 28 3
-1 M %z
+1 M %z 2026 S 20 2
+0 - %z
 Z Africa/Johannesburg 1:52 - LMT 1892 F 8
 1:30 - SAST 1903 Mar
 2 SA SAST
@@ -2483,7 +2359,9 @@ Z America/Detroit -5:32:11 - LMT 1905
 -5 u E%sT
 Z America/Edmonton -7:33:52 - LMT 1906 S
 -7 Ed M%sT 1987
--7 C M%sT
+-7 C M%sT 2026 Jun 18
+-7 1 MDT 2026 N 1 2
+-6 - CST
 Z America/Eirunepe -4:39:28 - LMT 1914
 -5 B %z 1988 S 12
 -5 - %z 1993 S 28

src/tzdata/zoneinfo/zone.tab

@@ -121,7 +121,7 @@ CA	+744144-0944945	America/Resolute	Central - NU (Resolute)
 CA	+624900-0920459	America/Rankin_Inlet	Central - NU (central)
 CA	+5024-10439	America/Regina	CST - SK (most areas)
 CA	+5017-10750	America/Swift_Current	CST - SK (midwest)
-CA	+5333-11328	America/Edmonton	Mountain - AB, BC(E), NT(E), SK(W)
+CA	+5333-11328	America/Edmonton	CST - AB, BC(E), NT(E), SK(W)
 CA	+690650-1050310	America/Cambridge_Bay	Mountain - NU (west)
 CA	+682059-1334300	America/Inuvik	Mountain - NT (west)
 CA	+4916-12307	America/Vancouver	MST - BC (most areas)

src/tzdata/zoneinfo/zone1970.tab

@@ -112,7 +112,7 @@ CA	+744144-0944945	America/Resolute	Central - NU (Resolute)
 CA	+624900-0920459	America/Rankin_Inlet	Central - NU (central)
 CA	+5024-10439	America/Regina	CST - SK (most areas)
 CA	+5017-10750	America/Swift_Current	CST - SK (midwest)
-CA	+5333-11328	America/Edmonton	Mountain - AB, BC(E), NT(E), SK(W)
+CA	+5333-11328	America/Edmonton	CST - AB, BC(E), NT(E), SK(W)
 CA	+690650-1050310	America/Cambridge_Bay	Mountain - NU (west)
 CA	+682059-1334300	America/Inuvik	Mountain - NT (west)
 CA	+4916-12307	America/Vancouver	MST - BC (most areas)

src/tzdata/zoneinfo/zonenow.tab

@@ -56,16 +56,19 @@ XX	+611305-1495401	America/Anchorage	most of Alaska (AKST/AKDT)
 XX	-2504-13005	Pacific/Pitcairn	Pitcairn
 #
 # -08/-07 - PST/PDT (North America DST)
-XX	+340308-1181434	America/Los_Angeles	Pacific (PST/PDT) - US & Canada; Mexico near US border
+XX	+340308-1181434	America/Los_Angeles	Pacific (PST/PDT) - US; Mexico near US border
 #
 # -08/-07 - PST/PDT (North America DST) until 2026-11-01 02:00; then MST
-XX	+4916-12307	America/Vancouver	MST - BC (most areas)
+XX	+4916-12307	America/Vancouver	Mountain Standard (MST) - British Columbia (most areas)
 #
 # -07 - MST
 XX	+332654-1120424	America/Phoenix	Mountain Standard (MST) - Arizona; western Mexico; Yukon
 #
 # -07/-06 - MST/MDT (North America DST)
-XX	+394421-1045903	America/Denver	Mountain (MST/MDT) - US & Canada; Mexico near US border
+XX	+394421-1045903	America/Denver	Mountain (MST/MDT) - US; Mexico near US border; northern Canada
+#
+# -07/-06 - MST/MDT (North America DST) until 2026-11-01 02:00; then CST
+XX	+5333-11328	America/Edmonton	Central Standard (CST) - Alberta and some neighbors
 #
 # -06
 XX	-0054-08936	Pacific/Galapagos	Galápagos