diff --git a/LICENSE b/LICENSE
index 78da19402..41a1e593b 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2013-2022 by the Babel Team, see AUTHORS for more information.
+Copyright (c) 2013-2023 by the Babel Team, see AUTHORS for more information.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
diff --git a/babel/__init__.py b/babel/__init__.py
index 225ec143c..9f40feb6b 100644
--- a/babel/__init__.py
+++ b/babel/__init__.py
@@ -12,7 +12,7 @@
        access to various locale display names, localized number and date
        formatting, etc.
 
-    :copyright: (c) 2013-2022 by the Babel Team.
+    :copyright: (c) 2013-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 
diff --git a/babel/core.py b/babel/core.py
index 57a6b63b3..6df585083 100644
--- a/babel/core.py
+++ b/babel/core.py
@@ -4,7 +4,7 @@
 
     Core locale representation and locale data access.
 
-    :copyright: (c) 2013-2022 by the Babel Team.
+    :copyright: (c) 2013-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 
diff --git a/babel/dates.py b/babel/dates.py
index 78c7facaf..eb1019e89 100644
--- a/babel/dates.py
+++ b/babel/dates.py
@@ -11,7 +11,7 @@
      * ``LC_ALL``, and
      * ``LANG``
 
-    :copyright: (c) 2013-2022 by the Babel Team.
+    :copyright: (c) 2013-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 
diff --git a/babel/lists.py b/babel/lists.py
index 97fc49a71..6ea4f014a 100644
--- a/babel/lists.py
+++ b/babel/lists.py
@@ -10,7 +10,7 @@
      * ``LC_ALL``, and
      * ``LANG``
 
-    :copyright: (c) 2015-2022 by the Babel Team.
+    :copyright: (c) 2015-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 from __future__ import annotations
diff --git a/babel/localedata.py b/babel/localedata.py
index a9c7c75ec..f1e8a1291 100644
--- a/babel/localedata.py
+++ b/babel/localedata.py
@@ -7,7 +7,7 @@
     :note: The `Locale` class, which uses this module under the hood, provides a
            more convenient interface for accessing the locale data.
 
-    :copyright: (c) 2013-2022 by the Babel Team.
+    :copyright: (c) 2013-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 
diff --git a/babel/localtime/__init__.py b/babel/localtime/__init__.py
index 29577fa37..e1ece7342 100644
--- a/babel/localtime/__init__.py
+++ b/babel/localtime/__init__.py
@@ -5,7 +5,7 @@
     Babel specific fork of tzlocal to determine the local timezone
     of the system.
 
-    :copyright: (c) 2013-2022 by the Babel Team.
+    :copyright: (c) 2013-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 
diff --git a/babel/messages/__init__.py b/babel/messages/__init__.py
index 60aeba0ed..883a2e055 100644
--- a/babel/messages/__init__.py
+++ b/babel/messages/__init__.py
@@ -4,7 +4,7 @@
 
     Support for ``gettext`` message catalogs.
 
-    :copyright: (c) 2013-2022 by the Babel Team.
+    :copyright: (c) 2013-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 
diff --git a/babel/messages/catalog.py b/babel/messages/catalog.py
index 47b9e62ea..20a3166e4 100644
--- a/babel/messages/catalog.py
+++ b/babel/messages/catalog.py
@@ -4,7 +4,7 @@
 
     Data structures for message catalogs.
 
-    :copyright: (c) 2013-2022 by the Babel Team.
+    :copyright: (c) 2013-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 from __future__ import annotations
diff --git a/babel/messages/checkers.py b/babel/messages/checkers.py
index 38a26e844..056f3e982 100644
--- a/babel/messages/checkers.py
+++ b/babel/messages/checkers.py
@@ -6,7 +6,7 @@
 
     :since: version 0.9
 
-    :copyright: (c) 2013-2022 by the Babel Team.
+    :copyright: (c) 2013-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 from __future__ import annotations
diff --git a/babel/messages/extract.py b/babel/messages/extract.py
index 5a34f645d..b6dce6fdb 100644
--- a/babel/messages/extract.py
+++ b/babel/messages/extract.py
@@ -12,7 +12,7 @@
     The main entry points into the extraction functionality are the functions
     `extract_from_dir` and `extract_from_file`.
 
-    :copyright: (c) 2013-2022 by the Babel Team.
+    :copyright: (c) 2013-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 from __future__ import annotations
diff --git a/babel/messages/frontend.py b/babel/messages/frontend.py
index 5baefbbb3..af7e1d11d 100644
--- a/babel/messages/frontend.py
+++ b/babel/messages/frontend.py
@@ -4,7 +4,7 @@
 
     Frontends for the message extraction functionality.
 
-    :copyright: (c) 2013-2022 by the Babel Team.
+    :copyright: (c) 2013-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 
diff --git a/babel/messages/jslexer.py b/babel/messages/jslexer.py
index 0563f6221..d3389d076 100644
--- a/babel/messages/jslexer.py
+++ b/babel/messages/jslexer.py
@@ -5,7 +5,7 @@
     A simple JavaScript 1.5 lexer which is used for the JavaScript
     extractor.
 
-    :copyright: (c) 2013-2022 by the Babel Team.
+    :copyright: (c) 2013-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 from __future__ import annotations
diff --git a/babel/messages/mofile.py b/babel/messages/mofile.py
index 0a432a792..4ec58cac7 100644
--- a/babel/messages/mofile.py
+++ b/babel/messages/mofile.py
@@ -4,7 +4,7 @@
 
     Writing of files in the ``gettext`` MO (machine object) format.
 
-    :copyright: (c) 2013-2022 by the Babel Team.
+    :copyright: (c) 2013-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 from __future__ import annotations
diff --git a/babel/messages/plurals.py b/babel/messages/plurals.py
index eb8de47e1..86ec8008b 100644
--- a/babel/messages/plurals.py
+++ b/babel/messages/plurals.py
@@ -4,7 +4,7 @@
 
     Plural form definitions.
 
-    :copyright: (c) 2013-2022 by the Babel Team.
+    :copyright: (c) 2013-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 from __future__ import annotations
diff --git a/babel/messages/pofile.py b/babel/messages/pofile.py
index 73d8cbe61..3c8a523e0 100644
--- a/babel/messages/pofile.py
+++ b/babel/messages/pofile.py
@@ -5,7 +5,7 @@
     Reading and writing of files in the ``gettext`` PO (portable object)
     format.
 
-    :copyright: (c) 2013-2022 by the Babel Team.
+    :copyright: (c) 2013-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 from __future__ import annotations
diff --git a/babel/numbers.py b/babel/numbers.py
index 1a86d9e62..de0f419d4 100644
--- a/babel/numbers.py
+++ b/babel/numbers.py
@@ -11,7 +11,7 @@
      * ``LC_ALL``, and
      * ``LANG``
 
-    :copyright: (c) 2013-2022 by the Babel Team.
+    :copyright: (c) 2013-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 # TODO:
diff --git a/babel/plural.py b/babel/plural.py
index 6cead04e9..c5c77161b 100644
--- a/babel/plural.py
+++ b/babel/plural.py
@@ -4,7 +4,7 @@
 
     CLDR Plural support.  See UTS #35.
 
-    :copyright: (c) 2013-2022 by the Babel Team.
+    :copyright: (c) 2013-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 from __future__ import annotations
diff --git a/babel/support.py b/babel/support.py
index 59593b86f..d6ff73aa2 100644
--- a/babel/support.py
+++ b/babel/support.py
@@ -7,7 +7,7 @@
 
     .. note: the code in this module is not used by Babel itself
 
-    :copyright: (c) 2013-2022 by the Babel Team.
+    :copyright: (c) 2013-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 from __future__ import annotations
diff --git a/babel/util.py b/babel/util.py
index 100e37dd1..17b08d1ec 100644
--- a/babel/util.py
+++ b/babel/util.py
@@ -4,7 +4,7 @@
 
     Various utility classes and functions.
 
-    :copyright: (c) 2013-2022 by the Babel Team.
+    :copyright: (c) 2013-2023 by the Babel Team.
     :license: BSD, see LICENSE for more details.
 """
 from __future__ import annotations
diff --git a/docs/conf.py b/docs/conf.py
index 45ce059fd..6a21fe607 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -44,7 +44,7 @@
 
 # General information about the project.
 project = 'Babel'
-copyright = '2022, The Babel Team'
+copyright = '2023, The Babel Team'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
diff --git a/scripts/dump_data.py b/scripts/dump_data.py
index 041a410e1..b17beb7be 100755
--- a/scripts/dump_data.py
+++ b/scripts/dump_data.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 #
-# Copyright (C) 2007-2011 Edgewall Software, 2013-2022 the Babel team
+# Copyright (C) 2007-2011 Edgewall Software, 2013-2023 the Babel team
 # All rights reserved.
 #
 # This software is licensed as described in the file LICENSE, which
diff --git a/scripts/dump_global.py b/scripts/dump_global.py
index 3fc95b6c9..1018a5392 100755
--- a/scripts/dump_global.py
+++ b/scripts/dump_global.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 #
-# Copyright (C) 2007-2011 Edgewall Software, 2013-2022 the Babel team
+# Copyright (C) 2007-2011 Edgewall Software, 2013-2023 the Babel team
 # All rights reserved.
 #
 # This software is licensed as described in the file LICENSE, which
diff --git a/scripts/import_cldr.py b/scripts/import_cldr.py
index 5d40e818a..5a4a3a817 100755
--- a/scripts/import_cldr.py
+++ b/scripts/import_cldr.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 #
-# Copyright (C) 2007-2011 Edgewall Software, 2013-2022 the Babel team
+# Copyright (C) 2007-2011 Edgewall Software, 2013-2023 the Babel team
 # All rights reserved.
 #
 # This software is licensed as described in the file LICENSE, which
diff --git a/tests/messages/test_catalog.py b/tests/messages/test_catalog.py
index b9d72bc39..da8ad5577 100644
--- a/tests/messages/test_catalog.py
+++ b/tests/messages/test_catalog.py
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2007-2011 Edgewall Software, 2013-2022 the Babel team
+# Copyright (C) 2007-2011 Edgewall Software, 2013-2023 the Babel team
 # All rights reserved.
 #
 # This software is licensed as described in the file LICENSE, which
diff --git a/tests/messages/test_checkers.py b/tests/messages/test_checkers.py
index 3ed9a1923..ac1e1bc46 100644
--- a/tests/messages/test_checkers.py
+++ b/tests/messages/test_checkers.py
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2007-2011 Edgewall Software, 2013-2022 the Babel team
+# Copyright (C) 2007-2011 Edgewall Software, 2013-2023 the Babel team
 # All rights reserved.
 #
 # This software is licensed as described in the file LICENSE, which
diff --git a/tests/messages/test_extract.py b/tests/messages/test_extract.py
index 7a0df8ecb..63f4d1052 100644
--- a/tests/messages/test_extract.py
+++ b/tests/messages/test_extract.py
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2007-2011 Edgewall Software, 2013-2022 the Babel team
+# Copyright (C) 2007-2011 Edgewall Software, 2013-2023 the Babel team
 # All rights reserved.
 #
 # This software is licensed as described in the file LICENSE, which
diff --git a/tests/messages/test_frontend.py b/tests/messages/test_frontend.py
index e540e7137..8e1e670ca 100644
--- a/tests/messages/test_frontend.py
+++ b/tests/messages/test_frontend.py
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2007-2011 Edgewall Software, 2013-2022 the Babel team
+# Copyright (C) 2007-2011 Edgewall Software, 2013-2023 the Babel team
 # All rights reserved.
 #
 # This software is licensed as described in the file LICENSE, which
diff --git a/tests/messages/test_mofile.py b/tests/messages/test_mofile.py
index 6a702edb4..986a74d6c 100644
--- a/tests/messages/test_mofile.py
+++ b/tests/messages/test_mofile.py
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2007-2011 Edgewall Software, 2013-2022 the Babel team
+# Copyright (C) 2007-2011 Edgewall Software, 2013-2023 the Babel team
 # All rights reserved.
 #
 # This software is licensed as described in the file LICENSE, which
diff --git a/tests/messages/test_plurals.py b/tests/messages/test_plurals.py
index df17fd866..56a22b9c5 100644
--- a/tests/messages/test_plurals.py
+++ b/tests/messages/test_plurals.py
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2007-2011 Edgewall Software, 2013-2022 the Babel team
+# Copyright (C) 2007-2011 Edgewall Software, 2013-2023 the Babel team
 # All rights reserved.
 #
 # This software is licensed as described in the file LICENSE, which
diff --git a/tests/messages/test_pofile.py b/tests/messages/test_pofile.py
index f668ea033..acd8c6e34 100644
--- a/tests/messages/test_pofile.py
+++ b/tests/messages/test_pofile.py
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2007-2011 Edgewall Software, 2013-2022 the Babel team
+# Copyright (C) 2007-2011 Edgewall Software, 2013-2023 the Babel team
 # All rights reserved.
 #
 # This software is licensed as described in the file LICENSE, which
diff --git a/tests/test_core.py b/tests/test_core.py
index 0023824f4..aa370131d 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2007-2011 Edgewall Software, 2013-2022 the Babel team
+# Copyright (C) 2007-2011 Edgewall Software, 2013-2023 the Babel team
 # All rights reserved.
 #
 # This software is licensed as described in the file LICENSE, which
diff --git a/tests/test_dates.py b/tests/test_dates.py
index 7ec4dc7cd..b94c710fd 100644
--- a/tests/test_dates.py
+++ b/tests/test_dates.py
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2007-2011 Edgewall Software, 2013-2022 the Babel team
+# Copyright (C) 2007-2011 Edgewall Software, 2013-2023 the Babel team
 # All rights reserved.
 #
 # This software is licensed as described in the file LICENSE, which
diff --git a/tests/test_localedata.py b/tests/test_localedata.py
index 75c34b19b..1cc3a63b3 100644
--- a/tests/test_localedata.py
+++ b/tests/test_localedata.py
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2007-2011 Edgewall Software, 2013-2022 the Babel team
+# Copyright (C) 2007-2011 Edgewall Software, 2013-2023 the Babel team
 # All rights reserved.
 #
 # This software is licensed as described in the file LICENSE, which
diff --git a/tests/test_numbers.py b/tests/test_numbers.py
index d6028b351..3674453f6 100644
--- a/tests/test_numbers.py
+++ b/tests/test_numbers.py
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2007-2011 Edgewall Software, 2013-2022 the Babel team
+# Copyright (C) 2007-2011 Edgewall Software, 2013-2023 the Babel team
 # All rights reserved.
 #
 # This software is licensed as described in the file LICENSE, which
diff --git a/tests/test_plural.py b/tests/test_plural.py
index e1e5ead60..6fbf3af7e 100644
--- a/tests/test_plural.py
+++ b/tests/test_plural.py
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2007-2011 Edgewall Software, 2013-2022 the Babel team
+# Copyright (C) 2007-2011 Edgewall Software, 2013-2023 the Babel team
 # All rights reserved.
 #
 # This software is licensed as described in the file LICENSE, which
diff --git a/tests/test_support.py b/tests/test_support.py
index 7c0235ca6..493d55151 100644
--- a/tests/test_support.py
+++ b/tests/test_support.py
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2007-2011 Edgewall Software, 2013-2022 the Babel team
+# Copyright (C) 2007-2011 Edgewall Software, 2013-2023 the Babel team
 # All rights reserved.
 #
 # This software is licensed as described in the file LICENSE, which
diff --git a/tests/test_util.py b/tests/test_util.py
index ae861ddc0..8ea68b2bb 100644
--- a/tests/test_util.py
+++ b/tests/test_util.py
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2007-2011 Edgewall Software, 2013-2022 the Babel team
+# Copyright (C) 2007-2011 Edgewall Software, 2013-2023 the Babel team
 # All rights reserved.
 #
 # This software is licensed as described in the file LICENSE, which