Update tzdata to version 2026c

# 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.

Author: actions-user

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/Africa/Casablanca

@@ -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