diff --git a/htdocs/langs/en_US/eventorganization.lang b/htdocs/langs/en_US/eventorganization.lang
index 17cdda6525e..e406566100e 100644
--- a/htdocs/langs/en_US/eventorganization.lang
+++ b/htdocs/langs/en_US/eventorganization.lang
@@ -172,3 +172,5 @@ ErrorSeveralCompaniesWithEmailContactUs=Several companies with this email has be
 ErrorSeveralCompaniesWithNameContactUs=Several companies with this name has been found so we can't validate automaticaly your registration. Please contact us at %s for a manual validation
 NoPublicActionsAllowedForThisEvent=No public actions are open to public for this event
 MaxNbOfAttendees=Max number of attendees
+DateStartEvent=Event start date
+DateEndEvent=Event end date