docs: def dt_from_http_datetime_str(http_full_datetime):
      """Parse HTTP Full Date formats and return as datetime.
  
      Args:
        http_full_datetime : str
          Each of the allowed formats are supported:
  
          - Sun, 06 Nov 1994 08:49:37 GMT  ; RFC 822, updated by RFC 1123
          - Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted by RFC 1036
          - Sun Nov  6 08:49:37 1994       ; ANSI C's asctime() format
  
          HTTP Full Dates are always in UTC.
  
      Returns:
        datetime
          The returned datetime is always timezone aware and in UTC.
  
      See Also:
        http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3.1
  
      """
      date_parts = list(email.utils.parsedate(http_full_datetime)[:6])
      year = date_parts[0]
      if year <= 99:
          year = year + 2000 if year < 50 else year + 1900
      return create_utc_datetime(year, *date_parts[1:])