diff --git a/Makefile b/Makefile
index 57206e0..d71f41f 100755
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: GPL-2.0
 # -*- makefile -*-
 #
-# Copyright (C) 2012-2021  B.A.T.M.A.N. contributors
+# Copyright (C) B.A.T.M.A.N. contributors
 #
 # License-Filename: LICENSES/preferred/GPL-2.0
 
diff --git a/alfred.h b/alfred.h
index 20d471b..1e2c058 100644
--- a/alfred.h
+++ b/alfred.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-/* Copyright (C) 2012-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Simon Wunderlich
  *
diff --git a/batadv_query.c b/batadv_query.c
index 410d271..d1853b7 100644
--- a/batadv_query.c
+++ b/batadv_query.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) 2012-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Simon Wunderlich
  *
diff --git a/batadv_query.h b/batadv_query.h
index f198de9..3b5ffba 100644
--- a/batadv_query.h
+++ b/batadv_query.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-/* Copyright (C) 2006-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Simon Wunderlich, Marek Lindner
  *
diff --git a/batadv_querynl.c b/batadv_querynl.c
index d9a6028..872cb85 100644
--- a/batadv_querynl.c
+++ b/batadv_querynl.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) 2009-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Marek Lindner <mareklindner@neomailbox.ch>, Andrew Lunn <andrew@lunn.ch>
  *
diff --git a/batadv_querynl.h b/batadv_querynl.h
index 7f969b9..70c2bb4 100644
--- a/batadv_querynl.h
+++ b/batadv_querynl.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-/* Copyright (C) 2009-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Marek Lindner <mareklindner@neomailbox.ch>, Andrew Lunn <andrew@lunn.ch>
  *
diff --git a/batman_adv.h b/batman_adv.h
index 27d35e7..35dc016 100644
--- a/batman_adv.h
+++ b/batman_adv.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: MIT */
-/* Copyright (C) 2016-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Matthias Schiffer
  */
diff --git a/bitops.h b/bitops.h
index 802fc25..582a1f2 100644
--- a/bitops.h
+++ b/bitops.h
@@ -2,7 +2,7 @@
 /* Minimal Linux-like bit manipulation helper functions
  * (reduced version for alfred)
  *
- * Copyright (c) 2012-2021, Sven Eckelmann <sven@narfation.org>
+ * Copyright (c) Sven Eckelmann <sven@narfation.org>
  *
  * License-Filename: LICENSES/preferred/MIT
  */
diff --git a/client.c b/client.c
index bd38c2f..dc643f3 100644
--- a/client.c
+++ b/client.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) 2012-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Simon Wunderlich
  *
diff --git a/gpsd/Makefile b/gpsd/Makefile
index b02404d..11ee7dd 100755
--- a/gpsd/Makefile
+++ b/gpsd/Makefile
@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: GPL-2.0
 # -*- makefile -*-
 #
-# Copyright (C) 2013-2021  B.A.T.M.A.N. contributors
+# Copyright (C) B.A.T.M.A.N. contributors
 #
 # License-Filename: LICENSES/preferred/GPL-2.0
 
diff --git a/gpsd/alfred-gpsd.c b/gpsd/alfred-gpsd.c
index ee9e6e8..20b3d98 100644
--- a/gpsd/alfred-gpsd.c
+++ b/gpsd/alfred-gpsd.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) 2013-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Andrew Lunn, Simon Wunderlich
  *
diff --git a/gpsd/alfred-gpsd.h b/gpsd/alfred-gpsd.h
index cea0e0c..3445bac 100644
--- a/gpsd/alfred-gpsd.h
+++ b/gpsd/alfred-gpsd.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-/* Copyright (C) 2013-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Andrew Lunn, Simon Wunderlich
  *
diff --git a/hash.c b/hash.c
index eb7ff1a..006d7ef 100644
--- a/hash.c
+++ b/hash.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) 2006-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Simon Wunderlich, Marek Lindner
  *
diff --git a/hash.h b/hash.h
index 0ff887a..36d7c41 100644
--- a/hash.h
+++ b/hash.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-/* Copyright (C) 2006-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Simon Wunderlich, Marek Lindner
  *
diff --git a/main.c b/main.c
index 37cc5eb..7b866cc 100644
--- a/main.c
+++ b/main.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) 2012-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Simon Wunderlich
  *
diff --git a/netlink.c b/netlink.c
index 5470b48..97a5936 100644
--- a/netlink.c
+++ b/netlink.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) 2009-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Marek Lindner <mareklindner@neomailbox.ch>, Andrew Lunn <andrew@lunn.ch>
  *
diff --git a/netlink.h b/netlink.h
index 74c32b5..45bff17 100644
--- a/netlink.h
+++ b/netlink.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-/* Copyright (C) 2009-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Marek Lindner <mareklindner@neomailbox.ch>, Andrew Lunn <andrew@lunn.ch>
  *
diff --git a/netsock.c b/netsock.c
index 28beef1..367b207 100644
--- a/netsock.c
+++ b/netsock.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) 2012-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Simon Wunderlich
  *
diff --git a/packet.h b/packet.h
index 7e91c58..678f939 100644
--- a/packet.h
+++ b/packet.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: MIT */
-/* Copyright (C) 2012-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Simon Wunderlich, Sven Eckelmann
  *
diff --git a/recv.c b/recv.c
index c4ac7e4..8acad10 100644
--- a/recv.c
+++ b/recv.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) 2012-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Simon Wunderlich
  *
diff --git a/send.c b/send.c
index 5afe374..10094ba 100644
--- a/send.c
+++ b/send.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) 2012-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Simon Wunderlich
  *
diff --git a/server.c b/server.c
index 5ea6683..fc27246 100644
--- a/server.c
+++ b/server.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) 2012-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Simon Wunderlich
  *
diff --git a/unix_sock.c b/unix_sock.c
index b05b8a2..d9ad07b 100644
--- a/unix_sock.c
+++ b/unix_sock.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) 2012-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Simon Wunderlich
  *
diff --git a/util.c b/util.c
index c1ee1fa..42a625a 100644
--- a/util.c
+++ b/util.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) 2012-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Simon Wunderlich
  *
diff --git a/vis/Makefile b/vis/Makefile
index ab79775..84917ea 100755
--- a/vis/Makefile
+++ b/vis/Makefile
@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: GPL-2.0
 # -*- makefile -*-
 #
-# Copyright (C) 2013-2021  B.A.T.M.A.N. contributors
+# Copyright (C) B.A.T.M.A.N. contributors
 #
 # License-Filename: LICENSES/preferred/GPL-2.0
 
diff --git a/vis/vis.c b/vis/vis.c
index 3b1f37c..387d166 100644
--- a/vis/vis.c
+++ b/vis/vis.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) 2013-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Simon Wunderlich
  *
diff --git a/vis/vis.h b/vis/vis.h
index f96253a..5a6ef5b 100644
--- a/vis/vis.h
+++ b/vis/vis.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-/* Copyright (C) 2013-2021  B.A.T.M.A.N. contributors:
+/* Copyright (C) B.A.T.M.A.N. contributors:
  *
  * Simon Wunderlich
  *
