diff --git a/modules/default/calendar/calendar.js b/modules/default/calendar/calendar.js
index 213f1024..c90153a0 100644
--- a/modules/default/calendar/calendar.js
+++ b/modules/default/calendar/calendar.js
@@ -31,7 +31,8 @@ Module.register("calendar",{
 			},
 		],
 		titleReplace: {
-			"De verjaardag van ": ""
+			"De verjaardag van ": "",
+			"'s birthday": ""
 		},
 	},