docs: def get_dst(date_obj):
      """Determine if dst is locally enabled at this time"""
      dst = 0
      if date_obj.year >= 1900:
          tmp_date = time.mktime(date_obj.timetuple())
          # DST is 1 so reduce time with 1 hour.
          dst = time.localtime(tmp_date)[-1]
      return dst