diff --git a/backend/handlers/bookings/manage.go b/backend/handlers/bookings/manage.go
index df3d5d4..91774dd 100644
--- a/backend/handlers/bookings/manage.go
+++ b/backend/handlers/bookings/manage.go
@@ -1957,6 +1957,12 @@ func AdminApproveEditRequestHandler(w http.ResponseWriter, r *http.Request) {
 			http.Error(w, "Cannot approve: the proposed time falls during a period when the salon is closed", http.StatusConflict)
 			return
 		}
+
+		// Also check the day isn't closed under a staged default hours change
+		if closeStr, err := getClosingTimeForDate(r.Context(), tx, weekday, localStart); err == nil && (closeStr == "00:00" || closeStr == "00:00:00") {
+			http.Error(w, "This day will be closed under the upcoming schedule change", http.StatusConflict)
+			return
+		}
 	}
 
 	// Build update query for bookings table