fix

service/service.py

@@ -55,6 +55,7 @@ class PointService:
     def to_excel(qs: models.PlacementPoint):
         data = pd.DataFrame(list(qs.values()))
         if not data.empty:
+            if data['start_date'].any():
                 data['start_date'] = data.get('start_date').dt.tz_localize(None)
             data['sample_trn'] = data['sample_trn'].astype(int)
             data.rename(columns={'district_id': 'district', 'area_id': 'area'}, inplace=True)