diff --git a/config/locales/app.admin.fr.yml b/config/locales/app.admin.fr.yml
index d85548e9e..0b41d0be1 100644
--- a/config/locales/app.admin.fr.yml
+++ b/config/locales/app.admin.fr.yml
@@ -98,7 +98,8 @@ fr:
         delete_this_slot: "Uniquement ce créneau"
         delete_this_and_next: "Ce créneau et tous les suivants"
         delete_all: "Tous les créneaux"
-        event_in_the_past: "Impossible de créer un créneau dans le passé."
+        event_in_the_past: "Create a slot in the past"
+        confirm_create_event_in_the_past: "You are about to create a slot in the past. Are you sure you want to do this? Members will not be able to book this slot."
         edit_event: "Modifier l'événement"
         view_reservations: "Voir les réservations"
         legend: "Légende"