diff --git a/LICENSE b/LICENSE
index 4633666..3c339ef 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 The MIT License (MIT) http://opensource.org/licenses/MIT
 
-Copyright (c) 2013-2017 Thijs Schreijer
+Copyright (c) 2013-2021 Thijs Schreijer
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/docs/index.html b/docs/index.html
index 34b322e..8368152 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -32,11 +32,11 @@
         </div>
 
         <div>
-          <p class="copyright">Copyright &copy; 2005, 2006 Jas Latrix <code class=
+          <p class="copyright">Copyright &copy; 2005-2006 Jas Latrix <code class=
           "email">&lt;<a href=
           "mailto:jastejada@yahoo.com">jastejada@yahoo.com</a>&gt;</code></p>
 
-          <p class="copyright">Copyright &copy; 2013-2014 Thijs
+          <p class="copyright">Copyright &copy; 2013-2021 Thijs
           Schreijer</p>
         </div>
 
diff --git a/src/date.lua b/src/date.lua
index c031ab5..4d50e5d 100644
--- a/src/date.lua
+++ b/src/date.lua
@@ -2,8 +2,8 @@
 -- Module for date and time calculations
 --
 -- Version 2.1.2
--- Copyright (C) 2006, by Jas Latrix (jastejada@yahoo.com)
--- Copyright (C) 2013-2014, by Thijs Schreijer
+-- Copyright (C) 2005-2006, by Jas Latrix (jastejada@yahoo.com)
+-- Copyright (C) 2013-2021, by Thijs Schreijer
 -- Licensed under MIT, http://opensource.org/licenses/MIT
 
 --[[ CONSTANTS ]]--