diff --git a/frontend/app/services/timezone-service.js b/frontend/app/services/timezone-service.js
index 5bc3dd2865..15fe8f3537 100644
--- a/frontend/app/services/timezone-service.js
+++ b/frontend/app/services/timezone-service.js
@@ -1,3 +1,30 @@
+//-- copyright
+// OpenProject is a project management system.
+// Copyright (C) 2012-2015 the OpenProject Foundation (OPF)
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License version 3.
+//
+// OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
+// Copyright (C) 2006-2013 Jean-Philippe Lang
+// Copyright (C) 2010-2013 the ChiliProject Team
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+// See doc/COPYRIGHT.rdoc for more details.
+//++
 
 module.exports = function(ConfigurationService, I18n) {
   var TimezoneService = {
@@ -39,4 +66,4 @@ module.exports = function(ConfigurationService, I18n) {
   };
 
   return TimezoneService;
-};
\ No newline at end of file
+};