diff --git a/libs/pytz/__init__.py b/libs/pytz/__init__.py
index 2e4dc394f..98b66553c 100644
--- a/libs/pytz/__init__.py
+++ b/libs/pytz/__init__.py
@@ -22,8 +22,8 @@ from pytz.tzfile import build_tzinfo
 
 
 # The IANA (nee Olson) database is updated several times a year.
-OLSON_VERSION = '2022f'
-VERSION = '2022.6'  # pip compatible version number.
+OLSON_VERSION = '2023c'
+VERSION = '2023.3'  # pip compatible version number.
 __version__ = VERSION
 
 OLSEN_VERSION = OLSON_VERSION  # Old releases had this misspelling
@@ -202,7 +202,7 @@ def _case_insensitive_zone_lookup(zone):
     """case-insensitively matching timezone, else return zone unchanged"""
     global _all_timezones_lower_to_standard
     if _all_timezones_lower_to_standard is None:
-        _all_timezones_lower_to_standard = dict((tz.lower(), tz) for tz in all_timezones)  # noqa
+        _all_timezones_lower_to_standard = dict((tz.lower(), tz) for tz in _all_timezones_unchecked)  # noqa
     return _all_timezones_lower_to_standard.get(zone.lower()) or zone  # noqa
 
 
@@ -514,7 +514,7 @@ def _test():
 
 if __name__ == '__main__':
     _test()
-all_timezones = \
+_all_timezones_unchecked = \
 ['Africa/Abidjan',
  'Africa/Accra',
  'Africa/Addis_Ababa',
@@ -610,6 +610,7 @@ all_timezones = \
  'America/Cayman',
  'America/Chicago',
  'America/Chihuahua',
+ 'America/Ciudad_Juarez',
  'America/Coral_Harbour',
  'America/Cordoba',
  'America/Costa_Rica',
@@ -1111,7 +1112,7 @@ all_timezones = \
  'WET',
  'Zulu']
 all_timezones = LazyList(
-        tz for tz in all_timezones if resource_exists(tz))
+        tz for tz in _all_timezones_unchecked if resource_exists(tz))
         
 all_timezones_set = LazySet(all_timezones)
 common_timezones = \
@@ -1204,6 +1205,7 @@ common_timezones = \
  'America/Cayman',
  'America/Chicago',
  'America/Chihuahua',
+ 'America/Ciudad_Juarez',
  'America/Costa_Rica',
  'America/Creston',
  'America/Cuiaba',
@@ -1275,7 +1277,6 @@ common_timezones = \
  'America/Nuuk',
  'America/Ojinaga',
  'America/Panama',
- 'America/Pangnirtung',
  'America/Paramaribo',
  'America/Phoenix',
  'America/Port-au-Prince',
@@ -1310,7 +1311,6 @@ common_timezones = \
  'America/Whitehorse',
  'America/Winnipeg',
  'America/Yakutat',
- 'America/Yellowknife',
  'Antarctica/Casey',
  'Antarctica/Davis',
  'Antarctica/DumontDUrville',
diff --git a/libs/pytz/tests/test_tzinfo.py b/libs/pytz/tests/test_tzinfo.py
index 70914eeac..7d6d7887b 100644
--- a/libs/pytz/tests/test_tzinfo.py
+++ b/libs/pytz/tests/test_tzinfo.py
@@ -27,8 +27,8 @@ from pytz.tzinfo import DstTzInfo, StaticTzInfo  # noqa
 
 # I test for expected version to ensure the correct version of pytz is
 # actually being tested.
-EXPECTED_VERSION = '2022.6'
-EXPECTED_OLSON_VERSION = '2022f'
+EXPECTED_VERSION = '2023.3'
+EXPECTED_OLSON_VERSION = '2023c'
 
 fmt = '%Y-%m-%d %H:%M:%S %Z%z'
 
diff --git a/libs/pytz/zoneinfo/Africa/Cairo b/libs/pytz/zoneinfo/Africa/Cairo
index d3f819623..dd538c65d 100644
Binary files a/libs/pytz/zoneinfo/Africa/Cairo and b/libs/pytz/zoneinfo/Africa/Cairo differ
diff --git a/libs/pytz/zoneinfo/Africa/Casablanca b/libs/pytz/zoneinfo/Africa/Casablanca
index 17e0d1b89..d39016b89 100644
Binary files a/libs/pytz/zoneinfo/Africa/Casablanca and b/libs/pytz/zoneinfo/Africa/Casablanca differ
diff --git a/libs/pytz/zoneinfo/Africa/El_Aaiun b/libs/pytz/zoneinfo/Africa/El_Aaiun
index 64f1b7694..066fbed00 100644
Binary files a/libs/pytz/zoneinfo/Africa/El_Aaiun and b/libs/pytz/zoneinfo/Africa/El_Aaiun differ
diff --git a/libs/pytz/zoneinfo/America/Bogota b/libs/pytz/zoneinfo/America/Bogota
index c274baee5..331a1b7c4 100644
Binary files a/libs/pytz/zoneinfo/America/Bogota and b/libs/pytz/zoneinfo/America/Bogota differ
diff --git a/libs/pytz/zoneinfo/America/Cambridge_Bay b/libs/pytz/zoneinfo/America/Cambridge_Bay
index f8db4b6eb..7e58a203c 100644
Binary files a/libs/pytz/zoneinfo/America/Cambridge_Bay and b/libs/pytz/zoneinfo/America/Cambridge_Bay differ
diff --git a/libs/pytz/zoneinfo/America/Ciudad_Juarez b/libs/pytz/zoneinfo/America/Ciudad_Juarez
new file mode 100644
index 000000000..eb1e53961
Binary files /dev/null and b/libs/pytz/zoneinfo/America/Ciudad_Juarez differ
diff --git a/libs/pytz/zoneinfo/America/Godthab b/libs/pytz/zoneinfo/America/Godthab
index 0d2149cc0..adb7934aa 100644
Binary files a/libs/pytz/zoneinfo/America/Godthab and b/libs/pytz/zoneinfo/America/Godthab differ
diff --git a/libs/pytz/zoneinfo/America/Inuvik b/libs/pytz/zoneinfo/America/Inuvik
index 87bb35529..04c2df456 100644
Binary files a/libs/pytz/zoneinfo/America/Inuvik and b/libs/pytz/zoneinfo/America/Inuvik differ
diff --git a/libs/pytz/zoneinfo/America/Iqaluit b/libs/pytz/zoneinfo/America/Iqaluit
index c8138bdbb..0b47b9032 100644
Binary files a/libs/pytz/zoneinfo/America/Iqaluit and b/libs/pytz/zoneinfo/America/Iqaluit differ
diff --git a/libs/pytz/zoneinfo/America/Nuuk b/libs/pytz/zoneinfo/America/Nuuk
index 0d2149cc0..adb7934aa 100644
Binary files a/libs/pytz/zoneinfo/America/Nuuk and b/libs/pytz/zoneinfo/America/Nuuk differ
diff --git a/libs/pytz/zoneinfo/America/Ojinaga b/libs/pytz/zoneinfo/America/Ojinaga
index f81827e84..f97946d1e 100644
Binary files a/libs/pytz/zoneinfo/America/Ojinaga and b/libs/pytz/zoneinfo/America/Ojinaga differ
diff --git a/libs/pytz/zoneinfo/America/Pangnirtung b/libs/pytz/zoneinfo/America/Pangnirtung
index 3e4e0db6a..0b47b9032 100644
Binary files a/libs/pytz/zoneinfo/America/Pangnirtung and b/libs/pytz/zoneinfo/America/Pangnirtung differ
diff --git a/libs/pytz/zoneinfo/America/Rankin_Inlet b/libs/pytz/zoneinfo/America/Rankin_Inlet
index 3a7058747..e2714921a 100644
Binary files a/libs/pytz/zoneinfo/America/Rankin_Inlet and b/libs/pytz/zoneinfo/America/Rankin_Inlet differ
diff --git a/libs/pytz/zoneinfo/America/Resolute b/libs/pytz/zoneinfo/America/Resolute
index 0a73b753b..19668900d 100644
Binary files a/libs/pytz/zoneinfo/America/Resolute and b/libs/pytz/zoneinfo/America/Resolute differ
diff --git a/libs/pytz/zoneinfo/America/Whitehorse b/libs/pytz/zoneinfo/America/Whitehorse
index 9ee229c0e..318c4a8e4 100644
Binary files a/libs/pytz/zoneinfo/America/Whitehorse and b/libs/pytz/zoneinfo/America/Whitehorse differ
diff --git a/libs/pytz/zoneinfo/America/Yellowknife b/libs/pytz/zoneinfo/America/Yellowknife
index e6afa390e..cd78a6f8b 100644
Binary files a/libs/pytz/zoneinfo/America/Yellowknife and b/libs/pytz/zoneinfo/America/Yellowknife differ
diff --git a/libs/pytz/zoneinfo/Asia/Gaza b/libs/pytz/zoneinfo/Asia/Gaza
index 22c47593d..c9b2ff908 100644
Binary files a/libs/pytz/zoneinfo/Asia/Gaza and b/libs/pytz/zoneinfo/Asia/Gaza differ
diff --git a/libs/pytz/zoneinfo/Asia/Hebron b/libs/pytz/zoneinfo/Asia/Hebron
index 0ee464803..64194fd85 100644
Binary files a/libs/pytz/zoneinfo/Asia/Hebron and b/libs/pytz/zoneinfo/Asia/Hebron differ
diff --git a/libs/pytz/zoneinfo/Asia/Kuala_Lumpur b/libs/pytz/zoneinfo/Asia/Kuala_Lumpur
index adb41cf4c..3d9f191e3 100644
Binary files a/libs/pytz/zoneinfo/Asia/Kuala_Lumpur and b/libs/pytz/zoneinfo/Asia/Kuala_Lumpur differ
diff --git a/libs/pytz/zoneinfo/Asia/Singapore b/libs/pytz/zoneinfo/Asia/Singapore
index adb41cf4c..3d9f191e3 100644
Binary files a/libs/pytz/zoneinfo/Asia/Singapore and b/libs/pytz/zoneinfo/Asia/Singapore differ
diff --git a/libs/pytz/zoneinfo/Canada/Yukon b/libs/pytz/zoneinfo/Canada/Yukon
index 9ee229c0e..318c4a8e4 100644
Binary files a/libs/pytz/zoneinfo/Canada/Yukon and b/libs/pytz/zoneinfo/Canada/Yukon differ
diff --git a/libs/pytz/zoneinfo/Egypt b/libs/pytz/zoneinfo/Egypt
index d3f819623..dd538c65d 100644
Binary files a/libs/pytz/zoneinfo/Egypt and b/libs/pytz/zoneinfo/Egypt differ
diff --git a/libs/pytz/zoneinfo/Europe/Kirov b/libs/pytz/zoneinfo/Europe/Kirov
index 61e17f2b5..0cfb956be 100644
Binary files a/libs/pytz/zoneinfo/Europe/Kirov and b/libs/pytz/zoneinfo/Europe/Kirov differ
diff --git a/libs/pytz/zoneinfo/Europe/Volgograd b/libs/pytz/zoneinfo/Europe/Volgograd
index 5539bac6c..9d51a38c0 100644
Binary files a/libs/pytz/zoneinfo/Europe/Volgograd and b/libs/pytz/zoneinfo/Europe/Volgograd differ
diff --git a/libs/pytz/zoneinfo/Singapore b/libs/pytz/zoneinfo/Singapore
index adb41cf4c..3d9f191e3 100644
Binary files a/libs/pytz/zoneinfo/Singapore and b/libs/pytz/zoneinfo/Singapore differ
diff --git a/libs/pytz/zoneinfo/iso3166.tab b/libs/pytz/zoneinfo/iso3166.tab
index a4ff61a4d..be3348d11 100644
--- a/libs/pytz/zoneinfo/iso3166.tab
+++ b/libs/pytz/zoneinfo/iso3166.tab
@@ -3,13 +3,13 @@
 # This file is in the public domain, so clarified as of
 # 2009-05-17 by Arthur David Olson.
 #
-# From Paul Eggert (2015-05-02):
+# From Paul Eggert (2022-11-18):
 # This file contains a table of two-letter country codes.  Columns are
 # separated by a single tab.  Lines beginning with '#' are comments.
 # All text uses UTF-8 encoding.  The columns of the table are as follows:
 #
 # 1.  ISO 3166-1 alpha-2 country code, current as of
-#     ISO 3166-1 N976 (2018-11-06).  See: Updates on ISO 3166-1
+#     ISO 3166-1 N1087 (2022-09-02).  See: Updates on ISO 3166-1
 #     https://isotc.iso.org/livelink/livelink/Open/16944257
 # 2.  The usual English name for the coded region,
 #     chosen so that alphabetic sorting of subsets produces helpful lists.
@@ -238,7 +238,7 @@ SY	Syria
 SZ	Eswatini (Swaziland)
 TC	Turks & Caicos Is
 TD	Chad
-TF	French Southern & Antarctic Lands
+TF	French S. Terr.
 TG	Togo
 TH	Thailand
 TJ	Tajikistan
diff --git a/libs/pytz/zoneinfo/leapseconds b/libs/pytz/zoneinfo/leapseconds
index 6826ac4a3..a6a170aa7 100644
--- a/libs/pytz/zoneinfo/leapseconds
+++ b/libs/pytz/zoneinfo/leapseconds
@@ -72,11 +72,11 @@ 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 2023	Jun	28	00:00:00
+#Expires 2023	Dec	28	00:00:00
 
 # POSIX timestamps for the data in this file:
 #updated 1467936000 (2016-07-08 00:00:00 UTC)
-#expires 1687910400 (2023-06-28 00:00:00 UTC)
+#expires 1703721600 (2023-12-28 00:00:00 UTC)
 
-#	Updated through IERS Bulletin C64
-#	File expires on:  28 June 2023
+#	Updated through IERS Bulletin C65
+#	File expires on:  28 December 2023
diff --git a/libs/pytz/zoneinfo/tzdata.zi b/libs/pytz/zoneinfo/tzdata.zi
index d8c78d476..23d99be45 100644
--- a/libs/pytz/zoneinfo/tzdata.zi
+++ b/libs/pytz/zoneinfo/tzdata.zi
@@ -75,6 +75,8 @@ R K 2014 o - May 15 24 1 S
 R K 2014 o - Jun 26 24 0 -
 R K 2014 o - Jul 31 24 1 S
 R K 2014 o - S lastTh 24 0 -
+R K 2023 ma - Ap lastF 0 1 S
+R K 2023 ma - O lastTh 24 0 -
 Z Africa/Cairo 2:5:9 - LMT 1900 O
 2 K EE%sT
 Z Africa/Bissau -1:2:20 - LMT 1912 Ja 1 1u
@@ -172,7 +174,7 @@ R M 2021 o - May 16 2 0 -
 R M 2022 o - Mar 27 3 -1 -
 R M 2022 o - May 8 2 0 -
 R M 2023 o - Mar 19 3 -1 -
-R M 2023 o - Ap 30 2 0 -
+R M 2023 o - Ap 23 2 0 -
 R M 2024 o - Mar 10 3 -1 -
 R M 2024 o - Ap 14 2 0 -
 R M 2025 o - F 23 3 -1 -
@@ -188,7 +190,7 @@ 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 - F 2 2 0 -
+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 -
@@ -204,7 +206,7 @@ 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 - N 7 2 0 -
+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 -
@@ -220,7 +222,7 @@ 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 12 2 0 -
+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 -
@@ -236,7 +238,7 @@ 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 17 2 0 -
+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 -
@@ -252,7 +254,7 @@ 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 19 2 0 -
+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 -
@@ -268,7 +270,7 @@ 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 24 2 0 -
+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 -
@@ -284,7 +286,7 @@ 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 29 2 0 -
+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 -
@@ -294,13 +296,13 @@ 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 - Jul 5 2 0 -
+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 - Jun 3 2 0 -
+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 -
@@ -997,8 +999,86 @@ R P 2020 2021 - Mar Sa<=30 0 1 S
 R P 2020 o - O 24 1 0 -
 R P 2021 o - O 29 1 0 -
 R P 2022 o - Mar 27 0 1 S
-R P 2022 ma - O Sa<=30 2 0 -
-R P 2023 ma - Mar Sa<=30 2 1 S
+R P 2022 2035 - O Sa<=30 2 0 -
+R P 2023 o - Ap 29 2 1 S
+R P 2024 o - Ap 13 2 1 S
+R P 2025 o - Ap 5 2 1 S
+R P 2026 2054 - Mar Sa<=30 2 1 S
+R P 2036 o - O 18 2 0 -
+R P 2037 o - O 10 2 0 -
+R P 2038 o - S 25 2 0 -
+R P 2039 o - S 17 2 0 -
+R P 2039 o - O 22 2 1 S
+R P 2039 2067 - O Sa<=30 2 0 -
+R P 2040 o - S 1 2 0 -
+R P 2040 o - O 13 2 1 S
+R P 2041 o - Au 24 2 0 -
+R P 2041 o - S 28 2 1 S
+R P 2042 o - Au 16 2 0 -
+R P 2042 o - S 20 2 1 S
+R P 2043 o - Au 1 2 0 -
+R P 2043 o - S 12 2 1 S
+R P 2044 o - Jul 23 2 0 -
+R P 2044 o - Au 27 2 1 S
+R P 2045 o - Jul 15 2 0 -
+R P 2045 o - Au 19 2 1 S
+R P 2046 o - Jun 30 2 0 -
+R P 2046 o - Au 11 2 1 S
+R P 2047 o - Jun 22 2 0 -
+R P 2047 o - Jul 27 2 1 S
+R P 2048 o - Jun 6 2 0 -
+R P 2048 o - Jul 18 2 1 S
+R P 2049 o - May 29 2 0 -
+R P 2049 o - Jul 3 2 1 S
+R P 2050 o - May 21 2 0 -
+R P 2050 o - Jun 25 2 1 S
+R P 2051 o - May 6 2 0 -
+R P 2051 o - Jun 17 2 1 S
+R P 2052 o - Ap 27 2 0 -
+R P 2052 o - Jun 1 2 1 S
+R P 2053 o - Ap 12 2 0 -
+R P 2053 o - May 24 2 1 S
+R P 2054 o - Ap 4 2 0 -
+R P 2054 o - May 16 2 1 S
+R P 2055 o - May 1 2 1 S
+R P 2056 o - Ap 22 2 1 S
+R P 2057 o - Ap 7 2 1 S
+R P 2058 ma - Mar Sa<=30 2 1 S
+R P 2068 o - O 20 2 0 -
+R P 2069 o - O 12 2 0 -
+R P 2070 o - O 4 2 0 -
+R P 2071 o - S 19 2 0 -
+R P 2072 o - S 10 2 0 -
+R P 2072 o - O 15 2 1 S
+R P 2073 o - S 2 2 0 -
+R P 2073 o - O 7 2 1 S
+R P 2074 o - Au 18 2 0 -
+R P 2074 o - S 29 2 1 S
+R P 2075 o - Au 10 2 0 -
+R P 2075 o - S 14 2 1 S
+R P 2075 ma - O Sa<=30 2 0 -
+R P 2076 o - Jul 25 2 0 -
+R P 2076 o - S 5 2 1 S
+R P 2077 o - Jul 17 2 0 -
+R P 2077 o - Au 28 2 1 S
+R P 2078 o - Jul 9 2 0 -
+R P 2078 o - Au 13 2 1 S
+R P 2079 o - Jun 24 2 0 -
+R P 2079 o - Au 5 2 1 S
+R P 2080 o - Jun 15 2 0 -
+R P 2080 o - Jul 20 2 1 S
+R P 2081 o - Jun 7 2 0 -
+R P 2081 o - Jul 12 2 1 S
+R P 2082 o - May 23 2 0 -
+R P 2082 o - Jul 4 2 1 S
+R P 2083 o - May 15 2 0 -
+R P 2083 o - Jun 19 2 1 S
+R P 2084 o - Ap 29 2 0 -
+R P 2084 o - Jun 10 2 1 S
+R P 2085 o - Ap 21 2 0 -
+R P 2085 o - Jun 2 2 1 S
+R P 2086 o - Ap 13 2 0 -
+R P 2086 o - May 18 2 1 S
 Z Asia/Gaza 2:17:52 - LMT 1900 O
 2 Z EET/EEST 1948 May 15
 2 K EE%sT 1967 Jun 5
@@ -1040,7 +1120,7 @@ Z Asia/Singapore 6:55:25 - LMT 1901
 7:20 - +0720 1941 S
 7:30 - +0730 1942 F 16
 9 - +09 1945 S 12
-7:30 - +0730 1982
+7:30 - +0730 1981 D 31 16u
 8 - +08
 Z Asia/Colombo 5:19:24 - LMT 1880
 5:19:32 - MMT 1906
@@ -1754,7 +1834,8 @@ Z America/Scoresbysund -1:27:52 - LMT 1916 Jul 28
 -1 E -01/+00
 Z America/Nuuk -3:26:56 - LMT 1916 Jul 28
 -3 - -03 1980 Ap 6 2
--3 E -03/-02
+-3 E -03/-02 2023 O 29 1u
+-2 E -02/-01
 Z America/Thule -4:35:8 - LMT 1916 Jul 28
 -4 Th A%sT
 Z Europe/Tallinn 1:39 - LMT 1880
@@ -2174,13 +2255,13 @@ Z Europe/Volgograd 2:57:40 - LMT 1920 Ja 3
 3 - +03 1930 Jun 21
 4 - +04 1961 N 11
 4 R +04/+05 1988 Mar 27 2s
-3 R +03/+04 1991 Mar 31 2s
+3 R MSK/MSD 1991 Mar 31 2s
 4 - +04 1992 Mar 29 2s
-3 R +03/+04 2011 Mar 27 2s
-4 - +04 2014 O 26 2s
-3 - +03 2018 O 28 2s
+3 R MSK/MSD 2011 Mar 27 2s
+4 - MSK 2014 O 26 2s
+3 - MSK 2018 O 28 2s
 4 - +04 2020 D 27 2s
-3 - +03
+3 - MSK
 Z Europe/Saratov 3:4:18 - LMT 1919 Jul 1 0u
 3 - +03 1930 Jun 21
 4 R +04/+05 1988 Mar 27 2s
@@ -2193,11 +2274,11 @@ Z Europe/Saratov 3:4:18 - LMT 1919 Jul 1 0u
 Z Europe/Kirov 3:18:48 - LMT 1919 Jul 1 0u
 3 - +03 1930 Jun 21
 4 R +04/+05 1989 Mar 26 2s
-3 R +03/+04 1991 Mar 31 2s
+3 R MSK/MSD 1991 Mar 31 2s
 4 - +04 1992 Mar 29 2s
-3 R +03/+04 2011 Mar 27 2s
-4 - +04 2014 O 26 2s
-3 - +03
+3 R MSK/MSD 2011 Mar 27 2s
+4 - MSK 2014 O 26 2s
+3 - MSK
 Z Europe/Samara 3:20:20 - LMT 1919 Jul 1 0u
 3 - +03 1930 Jun 21
 4 - +04 1935 Ja 27
@@ -3044,16 +3125,11 @@ R Y 1919 o - N 1 0 0 S
 R Y 1942 o - F 9 2 1 W
 R Y 1945 o - Au 14 23u 1 P
 R Y 1945 o - S 30 2 0 S
-R Y 1965 o - Ap lastSu 0 2 DD
-R Y 1965 o - O lastSu 2 0 S
-R Y 1980 1986 - Ap lastSu 2 1 D
-R Y 1980 2006 - O lastSu 2 0 S
+R Y 1972 1986 - Ap lastSu 2 1 D
+R Y 1972 2006 - O lastSu 2 0 S
 R Y 1987 2006 - Ap Su>=1 2 1 D
-Z America/Pangnirtung 0 - -00 1921
--4 Y A%sT 1995 Ap Su>=1 2
--5 C E%sT 1999 O 31 2
--6 C C%sT 2000 O 29 2
--5 C E%sT
+R Yu 1965 o - Ap lastSu 0 2 DD
+R Yu 1965 o - O lastSu 2 0 S
 Z America/Iqaluit 0 - -00 1942 Au
 -5 Y E%sT 1999 O 31 2
 -6 C C%sT 2000 O 29 2
@@ -3074,21 +3150,20 @@ Z America/Cambridge_Bay 0 - -00 1920
 -5 - EST 2000 N 5
 -6 - CST 2001 Ap 1 3
 -7 C M%sT
-Z America/Yellowknife 0 - -00 1935
--7 Y M%sT 1980
--7 C M%sT
 Z America/Inuvik 0 - -00 1953
 -8 Y P%sT 1979 Ap lastSu 2
 -7 Y M%sT 1980
 -7 C M%sT
 Z America/Whitehorse -9:0:12 - LMT 1900 Au 20
--9 Y Y%sT 1967 May 28
--8 Y P%sT 1980
+-9 Y Y%sT 1965
+-9 Yu Y%sT 1966 F 27
+-8 - PST 1980
 -8 C P%sT 2020 N
 -7 - MST
 Z America/Dawson -9:17:40 - LMT 1900 Au 20
--9 Y Y%sT 1973 O 28
--8 Y P%sT 1980
+-9 Y Y%sT 1965
+-9 Yu Y%sT 1973 O 28
+-8 - PST 1980
 -8 C P%sT 2020 N
 -7 - MST
 R m 1931 o - May 1 23 1 D
@@ -3132,6 +3207,17 @@ Z America/Mexico_City -6:36:36 - LMT 1922 Ja 1 7u
 -6 m C%sT 2001 S 30 2
 -6 - CST 2002 F 20
 -6 m C%sT
+Z America/Ciudad_Juarez -7:5:56 - LMT 1922 Ja 1 7u
+-7 - MST 1927 Jun 10 23
+-6 - CST 1930 N 15
+-7 m M%sT 1932 Ap
+-6 - CST 1996
+-6 m C%sT 1998
+-6 - CST 1998 Ap Su>=1 3
+-7 m M%sT 2010
+-7 u M%sT 2022 O 30 2
+-6 - CST 2022 N 30
+-7 u M%sT
 Z America/Ojinaga -6:57:40 - LMT 1922 Ja 1 7u
 -7 - MST 1927 Jun 10 23
 -6 - CST 1930 N 15
@@ -3141,7 +3227,8 @@ Z America/Ojinaga -6:57:40 - LMT 1922 Ja 1 7u
 -6 - CST 1998 Ap Su>=1 3
 -7 m M%sT 2010
 -7 u M%sT 2022 O 30 2
--6 - CST
+-6 - CST 2022 N 30
+-6 u C%sT
 Z America/Chihuahua -7:4:20 - LMT 1922 Ja 1 7u
 -7 - MST 1927 Jun 10 23
 -6 - CST 1930 N 15
@@ -3771,7 +3858,7 @@ Z Antarctica/Palmer 0 - -00 1965
 -4 x -04/-03 2016 D 4
 -3 - -03
 R CO 1992 o - May 3 0 1 -
-R CO 1993 o - Ap 4 0 0 -
+R CO 1993 o - F 6 24 0 -
 Z America/Bogota -4:56:16 - LMT 1884 Mar 13
 -4:56:16 - BMT 1914 N 23
 -5 CO -05/-04
@@ -4154,12 +4241,14 @@ L America/Tijuana America/Ensenada
 L America/Indiana/Indianapolis America/Fort_Wayne
 L America/Toronto America/Montreal
 L America/Toronto America/Nipigon
+L America/Iqaluit America/Pangnirtung
 L America/Rio_Branco America/Porto_Acre
 L America/Winnipeg America/Rainy_River
 L America/Argentina/Cordoba America/Rosario
 L America/Tijuana America/Santa_Isabel
 L America/Denver America/Shiprock
 L America/Toronto America/Thunder_Bay
+L America/Edmonton America/Yellowknife
 L Pacific/Auckland Antarctica/South_Pole
 L Asia/Shanghai Asia/Chongqing
 L Asia/Shanghai Asia/Harbin
diff --git a/libs/pytz/zoneinfo/zone.tab b/libs/pytz/zoneinfo/zone.tab
index 2636e21a9..dbcb61793 100644
--- a/libs/pytz/zoneinfo/zone.tab
+++ b/libs/pytz/zoneinfo/zone.tab
@@ -114,17 +114,15 @@ CA	+4606-06447	America/Moncton	Atlantic - New Brunswick
 CA	+5320-06025	America/Goose_Bay	Atlantic - Labrador (most areas)
 CA	+5125-05707	America/Blanc-Sablon	AST - QC (Lower North Shore)
 CA	+4339-07923	America/Toronto	Eastern - ON, QC (most areas)
-CA	+6344-06828	America/Iqaluit	Eastern - NU (most east areas)
-CA	+6608-06544	America/Pangnirtung	Eastern - NU (Pangnirtung)
+CA	+6344-06828	America/Iqaluit	Eastern - NU (most areas)
 CA	+484531-0913718	America/Atikokan	EST - ON (Atikokan); NU (Coral H)
 CA	+4953-09709	America/Winnipeg	Central - ON (west); Manitoba
 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); SK (W)
+CA	+5333-11328	America/Edmonton	Mountain - AB; BC (E); NT (E); SK (W)
 CA	+690650-1050310	America/Cambridge_Bay	Mountain - NU (west)
-CA	+6227-11421	America/Yellowknife	Mountain - NT (central)
 CA	+682059-1334300	America/Inuvik	Mountain - NT (west)
 CA	+4906-11631	America/Creston	MST - BC (Creston)
 CA	+5546-12014	America/Dawson_Creek	MST - BC (Dawson Cr, Ft St John)
@@ -140,7 +138,7 @@ CG	-0416+01517	Africa/Brazzaville
 CH	+4723+00832	Europe/Zurich
 CI	+0519-00402	Africa/Abidjan
 CK	-2114-15946	Pacific/Rarotonga
-CL	-3327-07040	America/Santiago	Chile (most areas)
+CL	-3327-07040	America/Santiago	most of Chile
 CL	-5309-07055	America/Punta_Arenas	Region of Magallanes
 CL	-2709-10926	Pacific/Easter	Easter Island
 CM	+0403+00942	Africa/Douala
@@ -152,10 +150,10 @@ CU	+2308-08222	America/Havana
 CV	+1455-02331	Atlantic/Cape_Verde
 CW	+1211-06900	America/Curacao
 CX	-1025+10543	Indian/Christmas
-CY	+3510+03322	Asia/Nicosia	Cyprus (most areas)
+CY	+3510+03322	Asia/Nicosia	most of Cyprus
 CY	+3507+03357	Asia/Famagusta	Northern Cyprus
 CZ	+5005+01426	Europe/Prague
-DE	+5230+01322	Europe/Berlin	Germany (most areas)
+DE	+5230+01322	Europe/Berlin	most of Germany
 DE	+4742+00841	Europe/Busingen	Busingen
 DJ	+1136+04309	Africa/Djibouti
 DK	+5540+01235	Europe/Copenhagen
@@ -188,7 +186,7 @@ GF	+0456-05220	America/Cayenne
 GG	+492717-0023210	Europe/Guernsey
 GH	+0533-00013	Africa/Accra
 GI	+3608-00521	Europe/Gibraltar
-GL	+6411-05144	America/Nuuk	Greenland (most areas)
+GL	+6411-05144	America/Nuuk	most of Greenland
 GL	+7646-01840	America/Danmarkshavn	National Park (east coast)
 GL	+7029-02158	America/Scoresbysund	Scoresbysund/Ittoqqortoormiit
 GL	+7634-06847	America/Thule	Thule/Pituffik
@@ -236,7 +234,7 @@ KP	+3901+12545	Asia/Pyongyang
 KR	+3733+12658	Asia/Seoul
 KW	+2920+04759	Asia/Kuwait
 KY	+1918-08123	America/Cayman
-KZ	+4315+07657	Asia/Almaty	Kazakhstan (most areas)
+KZ	+4315+07657	Asia/Almaty	most of Kazakhstan
 KZ	+4448+06528	Asia/Qyzylorda	Qyzylorda/Kyzylorda/Kzyl-Orda
 KZ	+5312+06337	Asia/Qostanay	Qostanay/Kostanay/Kustanay
 KZ	+5017+05710	Asia/Aqtobe	Aqtobe/Aktobe
@@ -260,12 +258,12 @@ MD	+4700+02850	Europe/Chisinau
 ME	+4226+01916	Europe/Podgorica
 MF	+1804-06305	America/Marigot
 MG	-1855+04731	Indian/Antananarivo
-MH	+0709+17112	Pacific/Majuro	Marshall Islands (most areas)
+MH	+0709+17112	Pacific/Majuro	most of Marshall Islands
 MH	+0905+16720	Pacific/Kwajalein	Kwajalein
 MK	+4159+02126	Europe/Skopje
 ML	+1239-00800	Africa/Bamako
 MM	+1647+09610	Asia/Yangon
-MN	+4755+10653	Asia/Ulaanbaatar	Mongolia (most areas)
+MN	+4755+10653	Asia/Ulaanbaatar	most of Mongolia
 MN	+4801+09139	Asia/Hovd	Bayan-Olgiy, Govi-Altai, Hovd, Uvs, Zavkhan
 MN	+4804+11430	Asia/Choibalsan	Dornod, Sukhbaatar
 MO	+221150+1133230	Asia/Macau
@@ -277,17 +275,18 @@ MT	+3554+01431	Europe/Malta
 MU	-2010+05730	Indian/Mauritius
 MV	+0410+07330	Indian/Maldives
 MW	-1547+03500	Africa/Blantyre
-MX	+1924-09909	America/Mexico_City	Central Time
-MX	+2105-08646	America/Cancun	Eastern Standard Time - Quintana Roo
-MX	+2058-08937	America/Merida	Central Time - Campeche, Yucatan
-MX	+2540-10019	America/Monterrey	Central Time - Durango; Coahuila, Nuevo Leon, Tamaulipas (most areas)
-MX	+2550-09730	America/Matamoros	Central Time US - Coahuila, Nuevo Leon, Tamaulipas (US border)
-MX	+2313-10625	America/Mazatlan	Mountain Time - Baja California Sur, Nayarit, Sinaloa
-MX	+2838-10605	America/Chihuahua	Mountain Time - Chihuahua (most areas)
-MX	+2934-10425	America/Ojinaga	Mountain Time US - Chihuahua (US border)
-MX	+2904-11058	America/Hermosillo	Mountain Standard Time - Sonora
-MX	+3232-11701	America/Tijuana	Pacific Time US - Baja California
-MX	+2048-10515	America/Bahia_Banderas	Central Time - Bahia de Banderas
+MX	+1924-09909	America/Mexico_City	Central Mexico
+MX	+2105-08646	America/Cancun	Quintana Roo
+MX	+2058-08937	America/Merida	Campeche, Yucatan
+MX	+2540-10019	America/Monterrey	Durango; Coahuila, Nuevo Leon, Tamaulipas (most areas)
+MX	+2550-09730	America/Matamoros	Coahuila, Nuevo Leon, Tamaulipas (US border)
+MX	+2838-10605	America/Chihuahua	Chihuahua (most areas)
+MX	+3144-10629	America/Ciudad_Juarez	Chihuahua (US border - west)
+MX	+2934-10425	America/Ojinaga	Chihuahua (US border - east)
+MX	+2313-10625	America/Mazatlan	Baja California Sur, Nayarit (most areas), Sinaloa
+MX	+2048-10515	America/Bahia_Banderas	Bahia de Banderas
+MX	+2904-11058	America/Hermosillo	Sonora
+MX	+3232-11701	America/Tijuana	Baja California
 MY	+0310+10142	Asia/Kuala_Lumpur	Malaysia (peninsula)
 MY	+0133+11020	Asia/Kuching	Sabah, Sarawak
 MZ	-2558+03235	Africa/Maputo
@@ -302,7 +301,7 @@ NO	+5955+01045	Europe/Oslo
 NP	+2743+08519	Asia/Kathmandu
 NR	-0031+16655	Pacific/Nauru
 NU	-1901-16955	Pacific/Niue
-NZ	-3652+17446	Pacific/Auckland	New Zealand (most areas)
+NZ	-3652+17446	Pacific/Auckland	most of New Zealand
 NZ	-4357-17633	Pacific/Chatham	Chatham Islands
 OM	+2336+05835	Asia/Muscat
 PA	+0858-07932	America/Panama
@@ -310,7 +309,7 @@ PE	-1203-07703	America/Lima
 PF	-1732-14934	Pacific/Tahiti	Society Islands
 PF	-0900-13930	Pacific/Marquesas	Marquesas Islands
 PF	-2308-13457	Pacific/Gambier	Gambier Islands
-PG	-0930+14710	Pacific/Port_Moresby	Papua New Guinea (most areas)
+PG	-0930+14710	Pacific/Port_Moresby	most of Papua New Guinea
 PG	-0613+15534	Pacific/Bougainville	Bougainville
 PH	+1435+12100	Asia/Manila
 PK	+2452+06703	Asia/Karachi
@@ -356,7 +355,7 @@ RU	+4310+13156	Asia/Vladivostok	MSK+07 - Amur River
 RU	+643337+1431336	Asia/Ust-Nera	MSK+07 - Oymyakonsky
 RU	+5934+15048	Asia/Magadan	MSK+08 - Magadan
 RU	+4658+14242	Asia/Sakhalin	MSK+08 - Sakhalin Island
-RU	+6728+15343	Asia/Srednekolymsk	MSK+08 - Sakha (E); North Kuril Is
+RU	+6728+15343	Asia/Srednekolymsk	MSK+08 - Sakha (E); N Kuril Is
 RU	+5301+15839	Asia/Kamchatka	MSK+09 - Kamchatka
 RU	+6445+17729	Asia/Anadyr	MSK+09 - Bering Sea
 RW	-0157+03004	Africa/Kigali
@@ -397,7 +396,7 @@ TT	+1039-06131	America/Port_of_Spain
 TV	-0831+17913	Pacific/Funafuti
 TW	+2503+12130	Asia/Taipei
 TZ	-0648+03917	Africa/Dar_es_Salaam
-UA	+5026+03031	Europe/Kyiv	Ukraine (most areas)
+UA	+5026+03031	Europe/Kyiv	most of Ukraine
 UG	+0019+03225	Africa/Kampala
 UM	+2813-17722	Pacific/Midway	Midway Islands
 UM	+1917+16637	Pacific/Wake	Wake Island
@@ -420,7 +419,7 @@ US	+465042-1012439	America/North_Dakota/New_Salem	Central - ND (Morton rural)
 US	+471551-1014640	America/North_Dakota/Beulah	Central - ND (Mercer)
 US	+394421-1045903	America/Denver	Mountain (most areas)
 US	+433649-1161209	America/Boise	Mountain - ID (south); OR (east)
-US	+332654-1120424	America/Phoenix	MST - Arizona (except Navajo)
+US	+332654-1120424	America/Phoenix	MST - AZ (except Navajo)
 US	+340308-1181434	America/Los_Angeles	Pacific
 US	+611305-1495401	America/Anchorage	Alaska (most areas)
 US	+581807-1342511	America/Juneau	Alaska - Juneau area
@@ -428,7 +427,7 @@ US	+571035-1351807	America/Sitka	Alaska - Sitka area
 US	+550737-1313435	America/Metlakatla	Alaska - Annette Island
 US	+593249-1394338	America/Yakutat	Alaska - Yakutat
 US	+643004-1652423	America/Nome	Alaska (west)
-US	+515248-1763929	America/Adak	Aleutian Islands
+US	+515248-1763929	America/Adak	Alaska - western Aleutians
 US	+211825-1575130	Pacific/Honolulu	Hawaii
 UY	-345433-0561245	America/Montevideo
 UZ	+3940+06648	Asia/Samarkand	Uzbekistan (west)
diff --git a/libs/pytz/zoneinfo/zone1970.tab b/libs/pytz/zoneinfo/zone1970.tab
index 75372e3fa..1f1cecb84 100644
--- a/libs/pytz/zoneinfo/zone1970.tab
+++ b/libs/pytz/zoneinfo/zone1970.tab
@@ -18,7 +18,10 @@
 #     Please see the theory.html file for how these names are chosen.
 #     If multiple timezones overlap a country, each has a row in the
 #     table, with each column 1 containing the country code.
-# 4.  Comments; present if and only if a country has multiple timezones.
+# 4.  Comments; present if and only if countries have multiple timezones,
+#     and useful only for those countries.  For example, the comments
+#     for the row with countries CH,DE,LI and name Europe/Zurich
+#     are useful only for DE, since CH and LI have no other timezones.
 #
 # If a timezone covers multiple countries, the most-populous city is used,
 # and that country is listed first in column 1; any other countries
@@ -34,7 +37,7 @@
 #country-
 #codes	coordinates	TZ	comments
 AD	+4230+00131	Europe/Andorra
-AE,OM,RE,SC,TF	+2518+05518	Asia/Dubai	UAE, Oman, Réunion, Seychelles, Crozet, Scattered Is
+AE,OM,RE,SC,TF	+2518+05518	Asia/Dubai	Crozet, Scattered Is
 AF	+3431+06912	Asia/Kabul
 AL	+4120+01950	Europe/Tirane
 AM	+4011+04430	Asia/Yerevan
@@ -45,7 +48,7 @@ AQ	-6448-06406	Antarctica/Palmer	Palmer
 AQ	-6734-06808	Antarctica/Rothera	Rothera
 AQ	-720041+0023206	Antarctica/Troll	Troll
 AR	-3436-05827	America/Argentina/Buenos_Aires	Buenos Aires (BA, CF)
-AR	-3124-06411	America/Argentina/Cordoba	Argentina (most areas: CB, CC, CN, ER, FM, MN, SE, SF)
+AR	-3124-06411	America/Argentina/Cordoba	most areas: CB, CC, CN, ER, FM, MN, SE, SF
 AR	-2447-06525	America/Argentina/Salta	Salta (SA, LP, NQ, RN)
 AR	-2411-06518	America/Argentina/Jujuy	Jujuy (JY)
 AR	-2649-06513	America/Argentina/Tucuman	Tucumán (TM)
@@ -56,7 +59,7 @@ AR	-3253-06849	America/Argentina/Mendoza	Mendoza (MZ)
 AR	-3319-06621	America/Argentina/San_Luis	San Luis (SL)
 AR	-5138-06913	America/Argentina/Rio_Gallegos	Santa Cruz (SC)
 AR	-5448-06818	America/Argentina/Ushuaia	Tierra del Fuego (TF)
-AS,UM	-1416-17042	Pacific/Pago_Pago	Samoa, Midway
+AS,UM	-1416-17042	Pacific/Pago_Pago	Midway
 AT	+4813+01620	Europe/Vienna
 AU	-3133+15905	Australia/Lord_Howe	Lord Howe Island
 AU	-5430+15857	Antarctica/Macquarie	Macquarie Island
@@ -101,27 +104,25 @@ CA	+4439-06336	America/Halifax	Atlantic - NS (most areas); PE
 CA	+4612-05957	America/Glace_Bay	Atlantic - NS (Cape Breton)
 CA	+4606-06447	America/Moncton	Atlantic - New Brunswick
 CA	+5320-06025	America/Goose_Bay	Atlantic - Labrador (most areas)
-CA,BS	+4339-07923	America/Toronto	Eastern - ON, QC (most areas), Bahamas
-CA	+6344-06828	America/Iqaluit	Eastern - NU (most east areas)
-CA	+6608-06544	America/Pangnirtung	Eastern - NU (Pangnirtung)
+CA,BS	+4339-07923	America/Toronto	Eastern - ON, QC (most areas)
+CA	+6344-06828	America/Iqaluit	Eastern - NU (most areas)
 CA	+4953-09709	America/Winnipeg	Central - ON (west); Manitoba
 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); SK (W)
+CA	+5333-11328	America/Edmonton	Mountain - AB; BC (E); NT (E); SK (W)
 CA	+690650-1050310	America/Cambridge_Bay	Mountain - NU (west)
-CA	+6227-11421	America/Yellowknife	Mountain - NT (central)
 CA	+682059-1334300	America/Inuvik	Mountain - NT (west)
 CA	+5546-12014	America/Dawson_Creek	MST - BC (Dawson Cr, Ft St John)
 CA	+5848-12242	America/Fort_Nelson	MST - BC (Ft Nelson)
 CA	+6043-13503	America/Whitehorse	MST - Yukon (east)
 CA	+6404-13925	America/Dawson	MST - Yukon (west)
 CA	+4916-12307	America/Vancouver	Pacific - BC (most areas)
-CH,DE,LI	+4723+00832	Europe/Zurich	Swiss time
+CH,DE,LI	+4723+00832	Europe/Zurich	Büsingen
 CI,BF,GH,GM,GN,IS,ML,MR,SH,SL,SN,TG	+0519-00402	Africa/Abidjan
 CK	-2114-15946	Pacific/Rarotonga
-CL	-3327-07040	America/Santiago	Chile (most areas)
+CL	-3327-07040	America/Santiago	most of Chile
 CL	-5309-07055	America/Punta_Arenas	Region of Magallanes
 CL	-2709-10926	Pacific/Easter	Easter Island
 CN	+3114+12128	Asia/Shanghai	Beijing Time
@@ -130,10 +131,10 @@ CO	+0436-07405	America/Bogota
 CR	+0956-08405	America/Costa_Rica
 CU	+2308-08222	America/Havana
 CV	+1455-02331	Atlantic/Cape_Verde
-CY	+3510+03322	Asia/Nicosia	Cyprus (most areas)
+CY	+3510+03322	Asia/Nicosia	most of Cyprus
 CY	+3507+03357	Asia/Famagusta	Northern Cyprus
 CZ,SK	+5005+01426	Europe/Prague
-DE,DK,NO,SE,SJ	+5230+01322	Europe/Berlin	Germany (most areas), Scandinavia
+DE,DK,NO,SE,SJ	+5230+01322	Europe/Berlin	most of Germany
 DO	+1828-06954	America/Santo_Domingo
 DZ	+3647+00303	Africa/Algiers
 EC	-0210-07950	America/Guayaquil	Ecuador (mainland)
@@ -154,7 +155,7 @@ GB,GG,IM,JE	+513030-0000731	Europe/London
 GE	+4143+04449	Asia/Tbilisi
 GF	+0456-05220	America/Cayenne
 GI	+3608-00521	Europe/Gibraltar
-GL	+6411-05144	America/Nuuk	Greenland (most areas)
+GL	+6411-05144	America/Nuuk	most of Greenland
 GL	+7646-01840	America/Danmarkshavn	National Park (east coast)
 GL	+7029-02158	America/Scoresbysund	Scoresbysund/Ittoqqortoormiit
 GL	+7634-06847	America/Thule	Thule/Pituffik
@@ -184,12 +185,12 @@ JO	+3157+03556	Asia/Amman
 JP	+353916+1394441	Asia/Tokyo
 KE,DJ,ER,ET,KM,MG,SO,TZ,UG,YT	-0117+03649	Africa/Nairobi
 KG	+4254+07436	Asia/Bishkek
-KI,MH,TV,UM,WF	+0125+17300	Pacific/Tarawa	Gilberts, Marshalls, Tuvalu, Wallis & Futuna, Wake
+KI,MH,TV,UM,WF	+0125+17300	Pacific/Tarawa	Gilberts, Marshalls, Wake
 KI	-0247-17143	Pacific/Kanton	Phoenix Islands
 KI	+0152-15720	Pacific/Kiritimati	Line Islands
 KP	+3901+12545	Asia/Pyongyang
 KR	+3733+12658	Asia/Seoul
-KZ	+4315+07657	Asia/Almaty	Kazakhstan (most areas)
+KZ	+4315+07657	Asia/Almaty	most of Kazakhstan
 KZ	+4448+06528	Asia/Qyzylorda	Qyzylorda/Kyzylorda/Kzyl-Orda
 KZ	+5312+06337	Asia/Qostanay	Qostanay/Kostanay/Kustanay
 KZ	+5017+05710	Asia/Aqtobe	Aqtöbe/Aktobe
@@ -206,26 +207,27 @@ MA	+3339-00735	Africa/Casablanca
 MD	+4700+02850	Europe/Chisinau
 MH	+0905+16720	Pacific/Kwajalein	Kwajalein
 MM,CC	+1647+09610	Asia/Yangon
-MN	+4755+10653	Asia/Ulaanbaatar	Mongolia (most areas)
+MN	+4755+10653	Asia/Ulaanbaatar	most of Mongolia
 MN	+4801+09139	Asia/Hovd	Bayan-Ölgii, Govi-Altai, Hovd, Uvs, Zavkhan
 MN	+4804+11430	Asia/Choibalsan	Dornod, Sükhbaatar
 MO	+221150+1133230	Asia/Macau
 MQ	+1436-06105	America/Martinique
 MT	+3554+01431	Europe/Malta
 MU	-2010+05730	Indian/Mauritius
-MV,TF	+0410+07330	Indian/Maldives	Maldives, Kerguelen, St Paul I, Amsterdam I
-MX	+1924-09909	America/Mexico_City	Central Time
-MX	+2105-08646	America/Cancun	Eastern Standard Time - Quintana Roo
-MX	+2058-08937	America/Merida	Central Time - Campeche, Yucatán
-MX	+2540-10019	America/Monterrey	Central Time - Durango; Coahuila, Nuevo León, Tamaulipas (most areas)
-MX	+2550-09730	America/Matamoros	Central Time US - Coahuila, Nuevo León, Tamaulipas (US border)
-MX	+2313-10625	America/Mazatlan	Mountain Time - Baja California Sur, Nayarit, Sinaloa
-MX	+2838-10605	America/Chihuahua	Mountain Time - Chihuahua (most areas)
-MX	+2934-10425	America/Ojinaga	Mountain Time US - Chihuahua (US border)
-MX	+2904-11058	America/Hermosillo	Mountain Standard Time - Sonora
-MX	+3232-11701	America/Tijuana	Pacific Time US - Baja California
-MX	+2048-10515	America/Bahia_Banderas	Central Time - Bahía de Banderas
-MY,BN	+0133+11020	Asia/Kuching	Sabah, Sarawak, Brunei
+MV,TF	+0410+07330	Indian/Maldives	Kerguelen, St Paul I, Amsterdam I
+MX	+1924-09909	America/Mexico_City	Central Mexico
+MX	+2105-08646	America/Cancun	Quintana Roo
+MX	+2058-08937	America/Merida	Campeche, Yucatán
+MX	+2540-10019	America/Monterrey	Durango; Coahuila, Nuevo León, Tamaulipas (most areas)
+MX	+2550-09730	America/Matamoros	Coahuila, Nuevo León, Tamaulipas (US border)
+MX	+2838-10605	America/Chihuahua	Chihuahua (most areas)
+MX	+3144-10629	America/Ciudad_Juarez	Chihuahua (US border - west)
+MX	+2934-10425	America/Ojinaga	Chihuahua (US border - east)
+MX	+2313-10625	America/Mazatlan	Baja California Sur, Nayarit (most areas), Sinaloa
+MX	+2048-10515	America/Bahia_Banderas	Bahía de Banderas
+MX	+2904-11058	America/Hermosillo	Sonora
+MX	+3232-11701	America/Tijuana	Baja California
+MY,BN	+0133+11020	Asia/Kuching	Sabah, Sarawak
 MZ,BI,BW,CD,MW,RW,ZM,ZW	-2558+03235	Africa/Maputo	Central Africa Time
 NA	-2234+01706	Africa/Windhoek
 NC	-2216+16627	Pacific/Noumea
@@ -237,7 +239,7 @@ NR	-0031+16655	Pacific/Nauru
 NU	-1901-16955	Pacific/Niue
 NZ,AQ	-3652+17446	Pacific/Auckland	New Zealand time
 NZ	-4357-17633	Pacific/Chatham	Chatham Islands
-PA,CA,KY	+0858-07932	America/Panama	EST - Panama, Cayman, ON (Atikokan), NU (Coral H)
+PA,CA,KY	+0858-07932	America/Panama	EST - ON (Atikokan), NU (Coral H)
 PE	-1203-07703	America/Lima
 PF	-1732-14934	Pacific/Tahiti	Society Islands
 PF	-0900-13930	Pacific/Marquesas	Marquesas Islands
@@ -285,13 +287,13 @@ RU	+4310+13156	Asia/Vladivostok	MSK+07 - Amur River
 RU	+643337+1431336	Asia/Ust-Nera	MSK+07 - Oymyakonsky
 RU	+5934+15048	Asia/Magadan	MSK+08 - Magadan
 RU	+4658+14242	Asia/Sakhalin	MSK+08 - Sakhalin Island
-RU	+6728+15343	Asia/Srednekolymsk	MSK+08 - Sakha (E); North Kuril Is
+RU	+6728+15343	Asia/Srednekolymsk	MSK+08 - Sakha (E); N Kuril Is
 RU	+5301+15839	Asia/Kamchatka	MSK+09 - Kamchatka
 RU	+6445+17729	Asia/Anadyr	MSK+09 - Bering Sea
-SA,AQ,KW,YE	+2438+04643	Asia/Riyadh	Arabia, Syowa
-SB,FM	-0932+16012	Pacific/Guadalcanal	Solomons, Pohnpei
+SA,AQ,KW,YE	+2438+04643	Asia/Riyadh	Syowa
+SB,FM	-0932+16012	Pacific/Guadalcanal	Pohnpei
 SD	+1536+03232	Africa/Khartoum
-SG,MY	+0117+10351	Asia/Singapore	Singapore, peninsular Malaysia
+SG,MY	+0117+10351	Asia/Singapore	peninsular Malaysia
 SR	+0550-05510	America/Paramaribo
 SS	+0451+03137	Africa/Juba
 ST	+0020+00644	Africa/Sao_Tome
@@ -299,7 +301,7 @@ SV	+1342-08912	America/El_Salvador
 SY	+3330+03618	Asia/Damascus
 TC	+2128-07108	America/Grand_Turk
 TD	+1207+01503	Africa/Ndjamena
-TH,CX,KH,LA,VN	+1345+10031	Asia/Bangkok	Indochina (most areas)
+TH,CX,KH,LA,VN	+1345+10031	Asia/Bangkok	north Vietnam
 TJ	+3835+06848	Asia/Dushanbe
 TK	-0922-17114	Pacific/Fakaofo
 TL	-0833+12535	Asia/Dili
@@ -308,7 +310,7 @@ TN	+3648+01011	Africa/Tunis
 TO	-210800-1751200	Pacific/Tongatapu
 TR	+4101+02858	Europe/Istanbul
 TW	+2503+12130	Asia/Taipei
-UA	+5026+03031	Europe/Kyiv	Ukraine (most areas)
+UA	+5026+03031	Europe/Kyiv	most of Ukraine
 US	+404251-0740023	America/New_York	Eastern (most areas)
 US	+421953-0830245	America/Detroit	Eastern - MI (most areas)
 US	+381515-0854534	America/Kentucky/Louisville	Eastern - KY (Louisville area)
@@ -328,7 +330,7 @@ US	+465042-1012439	America/North_Dakota/New_Salem	Central - ND (Morton rural)
 US	+471551-1014640	America/North_Dakota/Beulah	Central - ND (Mercer)
 US	+394421-1045903	America/Denver	Mountain (most areas)
 US	+433649-1161209	America/Boise	Mountain - ID (south); OR (east)
-US,CA	+332654-1120424	America/Phoenix	MST - Arizona (except Navajo), Creston BC
+US,CA	+332654-1120424	America/Phoenix	MST - AZ (most areas), Creston BC
 US	+340308-1181434	America/Los_Angeles	Pacific
 US	+611305-1495401	America/Anchorage	Alaska (most areas)
 US	+581807-1342511	America/Juneau	Alaska - Juneau area
@@ -336,13 +338,13 @@ US	+571035-1351807	America/Sitka	Alaska - Sitka area
 US	+550737-1313435	America/Metlakatla	Alaska - Annette Island
 US	+593249-1394338	America/Yakutat	Alaska - Yakutat
 US	+643004-1652423	America/Nome	Alaska (west)
-US	+515248-1763929	America/Adak	Aleutian Islands
-US,UM	+211825-1575130	Pacific/Honolulu	Hawaii
+US	+515248-1763929	America/Adak	Alaska - western Aleutians
+US	+211825-1575130	Pacific/Honolulu	Hawaii
 UY	-345433-0561245	America/Montevideo
 UZ	+3940+06648	Asia/Samarkand	Uzbekistan (west)
 UZ	+4120+06918	Asia/Tashkent	Uzbekistan (east)
 VE	+1030-06656	America/Caracas
-VN	+1045+10640	Asia/Ho_Chi_Minh	Vietnam (south)
+VN	+1045+10640	Asia/Ho_Chi_Minh	south Vietnam
 VU	-1740+16825	Pacific/Efate
 WS	-1350-17144	Pacific/Apia
 ZA,LS,SZ	-2615+02800	Africa/Johannesburg
diff --git a/libs/version.txt b/libs/version.txt
index 878cf53d2..77ca95e1e 100644
--- a/libs/version.txt
+++ b/libs/version.txt
@@ -26,7 +26,7 @@ pyrsistent==0.19.2
 pysubs2==1.4.4
 python-engineio==4.3.4
 python-socketio==5.7.2
-pytz==2022.6
+pytz==2023.3
 pytz_deprecation_shim==0.1.0.post0
 rarfile==4.0
 requests==2.28.1