diff --git a/calendar/resources/locale/fr-FR/dateFormat.properties b/calendar/resources/locale/fr-FR/dateFormat.properties
index 1bf3184b170e..89b56f031086 100644
--- a/calendar/resources/locale/fr-FR/dateFormat.properties
+++ b/calendar/resources/locale/fr-FR/dateFormat.properties
@@ -91,7 +91,7 @@ day.7.short=S
 am-string=AM
 pm-string=PM
 
-AllDay=Toute la journée
+AllDay=Toute la journ\u00e9e
 
 # Added to support localization of messages within eventDialog.js
 #   Day ordinals imply order within a list.