code: def make_date(df:DataFrame, date_field:str):
      "Make sure `df[field_name]` is of the right date type."
      field_dtype = df[date_field].dtype
      if isinstance(field_dtype, pd.core.dtypes.dtypes.DatetimeTZDtype):
          field_dtype = np.datetime64
      if not np.issubdtype(field_dtype, np.datetime64):
          df[date_field] = pd.to_datetime(df[date_field], infer_datetime_format=Truef make_date(df:DataFrame, date_field:str):
      "Make sure `df[field_name]` is of the right date type."
      field_dtype = df[date_field].dtype
      if isinstance(field_dtype, pd.core.dtypes.dtypes.DatetimeTZDtype):
          field_dtype = np.datetime64
      if not np.issubdtype(field_dtype, np.datetime64):
          df[date_field] = pd.to_datetime(df[date_field], infer_datetime_format=True)
docs: Make sure `df[field_name]` is of the right date type.