--- a/calendar/chrome/calendar/calendar-event-dialog.properties
+++ b/calendar/chrome/calendar/calendar-event-dialog.properties
@@ -278,16 +278,17 @@ repeatDetailsMonth12=Децембар
 # "Occurs day 3 of every 5 month
 #  effective 1/1/2009"
 
 # LOCALIZATION NOTE (monthlyLastDay):
 # Edit recurrence window -> Recurrence details link on Event/Task dialog window
 # A monthly rule with one or more days of the month (monthlyDaysOfNth) and the
 # string "the last day" of the month.
 # e.g.: "Occurs day 15, 20, 25 and the last day of every 3 months"
+monthlyLastDay=последњи дан
 
 # LOCALIZATION NOTE (ruleTooComplex):
 # This string is shown in the repeat details area if our code can't handle the
 # complexity of the recurrence rule yet.
 ruleTooComplex=Кликните овде за детаље
 
 # LOCALIZATION NOTE (ruleTooComplexSummary):
 # This string is shown in the event summary dialog if our code can't handle the