happy new year ✨

For future reference, this command did the trick:
ack -l 'Copyright 201' | xargs perl -pi -E 's/Copyright 201./Copyright 2013/'

beet

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 
 # This file is part of beets.
-# Copyright 2010, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/__init__.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/autotag/__init__.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/autotag/hooks.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/autotag/match.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/autotag/mb.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/importer.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/library.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/mediafile.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/plugins.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/ui/__init__.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/ui/commands.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/ui/migrate.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/util/__init__.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/util/artresizer.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Fabrice Laporte
+# Copyright 2013, Fabrice Laporte
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/util/confit.py

@@ -1,5 +1,5 @@
 # This file is part of Confit.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/util/enumeration.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2011, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/util/functemplate.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2011, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/util/pipeline.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2011, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beets/vfs.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2011, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/__init__.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2010, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/bench.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/bpd/__init__.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2010, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/bpd/gstplayer.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2010, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/chroma.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/convert.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Jakob Schnitzer.
+# Copyright 2013, Jakob Schnitzer.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/echonest_tempo.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, David Brenner <david.a.brenner gmail>
+# Copyright 2013, David Brenner <david.a.brenner gmail>
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/embedart.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/fetchart.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/fuzzy.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2011, Philippe Mongeau.
+# Copyright 2013, Philippe Mongeau.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/ihate.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Blemjhoo Tezoulbr <baobab@heresiarch.info>.
+# Copyright 2013, Blemjhoo Tezoulbr <baobab@heresiarch.info>.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/importfeeds.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Fabrice Laporte.
+# Copyright 2013, Fabrice Laporte.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/info.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/inline.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2011, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/lastgenre/__init__.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2011, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/lyrics.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/mpdupdate.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2010, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/random.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2011, Philippe Mongeau.
+# Copyright 2013, Philippe Mongeau.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/replaygain.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Fabrice Laporte.
+# Copyright 2013, Fabrice Laporte.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/rewrite.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/scrub.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/the.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Blemjhoo Tezoulbr <baobab@heresiarch.info>.
+# Copyright 2013, Blemjhoo Tezoulbr <baobab@heresiarch.info>.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/web/__init__.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

beetsplug/web/static/jquery.js

@@ -2,13 +2,13 @@
  * jQuery JavaScript Library v1.7.1
  * http://jquery.com/
  *
- * Copyright 2011, John Resig
+ * Copyright 2013, John Resig
  * Dual licensed under the MIT or GPL Version 2 licenses.
  * http://jquery.org/license
  *
  * Includes Sizzle.js
  * http://sizzlejs.com/
- * Copyright 2011, The Dojo Foundation
+ * Copyright 2013, The Dojo Foundation
  * Released under the MIT, BSD, and GPL Licenses.
  *
  * Date: Mon Nov 21 21:11:03 2011 -0500
@@ -3851,7 +3851,7 @@ jQuery.each( ("blur focus focusin focusout load resize scroll unload click dblcl
 
 /*!
  * Sizzle CSS Selector Engine
- *  Copyright 2011, The Dojo Foundation
+ *  Copyright 2013, The Dojo Foundation
  *  Released under the MIT, BSD, and GPL Licenses.
  *  More information: http://sizzlejs.com/
  */

beetsplug/zero.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Blemjhoo Tezoulbr <baobab@heresiarch.info>.
+# Copyright 2013, Blemjhoo Tezoulbr <baobab@heresiarch.info>.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

setup.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

test/_common.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2011, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

test/test_art.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

test/test_autotag.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2011, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

test/test_db.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2011, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

test/test_files.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2011, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

test/test_importer.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

test/test_mb.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

test/test_mediafile.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2010, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

test/test_mediafile_basic.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2012, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

test/test_pipeline.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2010, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

test/test_player.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2010, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

test/test_query.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2011, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

test/test_template.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2011, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

test/test_ui.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2011, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

test/test_vfs.py

@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2011, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the

test/testall.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 
 # This file is part of beets.
-# Copyright 2010, Adrian Sampson.
+# Copyright 2013, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the