diff --git a/frontend/src/pages/Kalender.tsx b/frontend/src/pages/Kalender.tsx
index 70d3608..4594101 100644
--- a/frontend/src/pages/Kalender.tsx
+++ b/frontend/src/pages/Kalender.tsx
@@ -1544,8 +1544,6 @@ function VeranstaltungFormDialog({
                 : new Date(raw + ':00');
               if (isNaN(d.getTime())) return;
               handleChange('datum_bis', d.toISOString());
-            }}
-              handleChange('datum_bis', iso);
             }}
             InputLabelProps={{ shrink: true }}
             fullWidth