code: def pre_save(self, model_instance, add):
          
          # pylint: disable=newstyle
          # Retrieve the currently entered datetime
          value = super(
              LinkedTZDateTimeField,
              self
          ).pre_save(
              model_instance=model_instance,
              add=add
          )
  
          # Convert the value to the correct time/timezone
          value = self._convert_value(
              value=value,
              model_instance=model_instance,
              add=add
          )
  
          setattr(model_instance, self.attname, value)
  
          return value
docs: Converts the value being saved based on `populate_from` and
          `time_override`