diff --git a/calendar/locales/en-US/chrome/calendar/aboutDialog.dtd b/calendar/locales/en-US/chrome/calendar/aboutDialog.dtd
index 0aa64771dd0..f1741ea3a3b 100644
--- a/calendar/locales/en-US/chrome/calendar/aboutDialog.dtd
+++ b/calendar/locales/en-US/chrome/calendar/aboutDialog.dtd
@@ -39,7 +39,7 @@
 <!ENTITY copyright              "Credits">
 <!ENTITY aboutLink              "&lt; About &brandFullName;">
 <!ENTITY aboutVersion           "version">
-<!ENTITY copyrightText          "&#169;1998-2005 Contributors. All rights
+<!ENTITY copyrightText          "&#169;1998-2006 Contributors. All rights
                                  reserved. Mozilla Sunbird, Sunbird, and the
                                  Sunbird logos are trademarks of the Mozilla
                                  Foundation. All rights reserved.">