code: def daylight_utc(self, date, latitude, longitude, observer_elevation=0):
          
  
          start = self.sunrise_utc(date, latitude, longitude, observer_elevation)
          end = self.sunset_utc(date, latitude, longitude, observer_elevation)
  
          return start, end
docs: Calculate daylight start and end times in the UTC timezone.
  
          :param date:       Date to calculate for.
          :type date:        :class:`datetime.date`
          :param latitude:   Latitude - Northern latitudes should be positive
          :type latitude:    float
          :param longitude:  Longitude - Eastern longitudes should be positive
          :type longitude:   float
          :param observer_elevation:  Elevation in metres to calculate daylight for
          :type observer_elevation:   int
  
          :return: A tuple of the UTC date and time at which daylight starts and ends.
          :rtype: (:class:`~datetime.datetime`, :class:`~datetime.datetime`)