Update tzdata to version 2026f

NEWS.md

@@ -1,3 +1,39 @@
+# Version 2026.6
+Upstream version 2026f released 2026-10-28T06:16:49+00:00
+
+## Briefly:
+
+Cuba will not fall back 2026-11-01; stays on -04 through 2027-11-07. No more
+leap seconds, and leap second tables no longer expire. Improve 1965/1966 data
+for Brazil.
+
+## Changes to future timestamps
+
+Cuba will not fall back to -05 on 2026-11-01 and instead plans to maintain -04
+through 2027-11-07.
+
+## Changes to past timestamps
+
+In 1965 Brazil ended DST on 03-31 at 24:00 not 00:00, and in 1966 it ended DST
+on 03-01 at 01:00 not 00:00.  (Thanks to Daniel Dias Rodrigues.)
+
+## Changes to documentation and commentary
+
+Documentation and commentary now reflect leap seconds’ demise.
+
+## Changes to commentary
+
+Discussion on timekeeping in northwestern Ontario has been updated to reflect
+that provincial regulation has been issued to allow these areas to stay aligned
+with America/Winnipeg and follow Manitoba’s adoption of year-round -05 after
+all.  (Thanks to Aoun Khan, Chris Walton, and Heitor David Pinto.)
+
+Discussion on timekeeping in Saskatchewan has been updated to document its new
+Time Act, 2026 which comes into force on 2026-10-30.  (Thanks to Heitor David
+Pinto.)  No change is expected.
+
+---
+
 # Version 2026.5
 Upstream version 2026e released 2026-09-30T00:14:38+00:00
 

VERSION

@@ -1 +1 @@
-2026.5
+2026.6

news.d/2026f.md

@@ -0,0 +1,33 @@
+# Version 2026.6
+Upstream version 2026f released 2026-10-28T06:16:49+00:00
+
+## Briefly:
+
+Cuba will not fall back 2026-11-01; stays on -04 through 2027-11-07. No more
+leap seconds, and leap second tables no longer expire. Improve 1965/1966 data
+for Brazil.
+
+## Changes to future timestamps
+
+Cuba will not fall back to -05 on 2026-11-01 and instead plans to maintain -04
+through 2027-11-07.
+
+## Changes to past timestamps
+
+In 1965 Brazil ended DST on 03-31 at 24:00 not 00:00, and in 1966 it ended DST
+on 03-01 at 01:00 not 00:00.  (Thanks to Daniel Dias Rodrigues.)
+
+## Changes to documentation and commentary
+
+Documentation and commentary now reflect leap seconds’ demise.
+
+## Changes to commentary
+
+Discussion on timekeeping in northwestern Ontario has been updated to reflect
+that provincial regulation has been issued to allow these areas to stay aligned
+with America/Winnipeg and follow Manitoba’s adoption of year-round -05 after
+all.  (Thanks to Aoun Khan, Chris Walton, and Heitor David Pinto.)
+
+Discussion on timekeeping in Saskatchewan has been updated to document its new
+Time Act, 2026 which comes into force on 2026-10-30.  (Thanks to Heitor David
+Pinto.)  No change is expected.

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__ = "2026.5"
+__version__ = "2026.6"
 
 # This exposes the original IANA version number.
-IANA_VERSION = "2026e"
+IANA_VERSION = "2026f"

src/tzdata/zoneinfo/leapseconds

@@ -1,12 +1,12 @@
-# Allowance for leap seconds added to each time zone file.
+# Leap seconds (1972-2016) optionally added to TZif files.
 
 # This file is in the public domain.
 
 # This file is generated automatically from the data in the public-domain
 # NIST/IERS format leap-seconds.list file, which can be copied from
 # <https://hpiers.obspm.fr/iers/bul/bulc/ntp/leap-seconds.list>
 # or via a less-secure protocol and with different comments and
-# less volatile last-modified and expiration timestamps, from
+# less volatile timestamp metadata, from
 # <ftp://ftp.boulder.nist.gov/pub/time/leap-seconds.list>.
 # For more about leap-seconds.list, please see
 # The NTP Timescale and Leap Seconds
@@ -18,10 +18,8 @@
 # (ITU-R) Recommendation TF.460-6 (02/2002)
 # <https://www.itu.int/rec/R-REC-TF.460-6-200202-I/>.
 # The International Earth Rotation and Reference Systems Service (IERS)
-# periodically uses leap seconds to keep UTC to within 0.9 s of UT1
-# (a proxy for Earth's angle in space as measured by astronomers)
-# and publishes leap second data in a copyrighted file
-# <https://hpiers.obspm.fr/iers/bul/bulc/Leap_Second.dat>.
+# periodically used leap seconds to keep UTC to within 0.9 s of UT1
+# (a proxy for Earth's angle in space as measured by astronomers).
 # See: Levine J. Coordinated Universal Time and the leap second.
 # URSI Radio Sci Bull. 2016;89(4):30-6. doi:10.23919/URSIRSB.2016.7909995
 # <https://ieeexplore.ieee.org/document/7909995>.
@@ -33,8 +31,8 @@
 # of UTC.
 
 # All leap-seconds are Stationary (S) at the given UTC time.
-# The correction (+ or -) is made at the given time, so in the unlikely
-# event of a negative leap second, a line would look like this:
+# The correction (+ or -) is made at the given time, so if a negative
+# leap second had ever occurred, a line would have looked like this:
 # Leap	YEAR	MON	DAY	23:59:59	-	S
 # Typical lines look like this:
 # Leap	YEAR	MON	DAY	23:59:60	+	S
@@ -67,19 +65,19 @@ Leap	2015	Jun	30	23:59:60	+	S
 Leap	2016	Dec	31	23:59:60	+	S
 
 # UTC timestamp when this leap second list expires.
-# Any additional leap seconds will come after this.
-# This Expires line is commented out for now,
+# The idea was that any additional leap seconds would come after this.
+# This timestamp is obsolete as there will be no more leap seconds.
+# This Expires line is commented out, to avoid confusion, and
 # so that pre-2020a zic implementations do not reject this file.
 #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
 # or, if this file was derived from the IERS leap-seconds.list,
 # the last time that file changed in any way.
-# "#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 1783323897 (2026-07-06 07:44:57 UTC)
+# "#expires" gives the first time this file might be wrong.
+# This timestamp is obsolete as there will be no more leap seconds.
 #expires 1814140800 (2027-06-28 00:00:00 UTC)
 
 #	Updated through IERS Bulletin C (https://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat)

src/tzdata/zoneinfo/tzdata.zi

@@ -1,4 +1,4 @@
-# version 2026e
+# version 2026f
 # redo posix_only
 # This zic input file is in the public domain.
 R d 1916 o - Jun 14 23s 1 S
@@ -1700,8 +1700,10 @@ R Q 2009 2010 - Mar Su>=8 0s 1 D
 R Q 2011 o - Mar Su>=15 0s 1 D
 R Q 2011 o - N 13 0s 0 S
 R Q 2012 o - Ap 1 0s 1 D
-R Q 2012 ma - N Su>=1 0s 0 S
-R Q 2013 ma - Mar Su>=8 0s 1 D
+R Q 2012 2025 - N Su>=1 0s 0 S
+R Q 2013 2026 - Mar Su>=8 0s 1 D
+R Q 2027 ma - N Su>=1 0s 0 S
+R Q 2028 ma - Mar Su>=8 0s 1 D
 R DO 1966 o - O 30 0 1 EDT
 R DO 1967 o - F 28 0 0 EST
 R DO 1969 1973 - O lastSu 0 0:30 -0430
@@ -1771,19 +1773,20 @@ R A 2008 o - O Su>=15 0 1 -
 R Sa 2008 2009 - Mar Su>=8 0 0 -
 R Sa 2007 2008 - O Su>=8 0 1 -
 R B 1931 o - O 3 11 1 -
-R B 1932 1933 - Ap 1 0 0 -
+R B 1932 1933 - Mar 31 24 0 -
 R B 1932 o - O 3 0 1 -
 R B 1949 1952 - D 1 0 1 -
 R B 1950 o - Ap 16 1 0 -
-R B 1951 1952 - Ap 1 0 0 -
-R B 1953 o - Mar 1 0 0 -
+R B 1951 1952 - Mar 31 24 0 -
+R B 1953 o - F 28 24 0 -
 R B 1963 o - D 9 0 1 -
 R B 1964 o - Mar 1 0 0 -
 R B 1965 o - Ja 31 0 1 -
-R B 1965 o - Mar 31 0 0 -
-R B 1965 o - D 1 0 1 -
-R B 1966 1968 - Mar 1 0 0 -
+R B 1965 o - Mar 31 24 0 -
+R B 1965 o - N 30 24 1 -
+R B 1966 o - Mar 1 1 0 -
 R B 1966 1967 - N 1 0 1 -
+R B 1967 1968 - Mar 1 0 0 -
 R B 1985 o - N 2 0 1 -
 R B 1986 o - Mar 15 0 0 -
 R B 1986 o - O 25 0 1 -