code: def _parse_date_perforce(aDateString):
      
      # Fri, 2006/09/15 08:19:53 EDT
      _my_date_pattern = re.compile( \
          r'(\w{,3}), (\d{,4})/(\d{,2})/(\d{2}) (\d{,2}):(\d{2}):(\d{2}) (\w{,3})')
  
      m = _my_date_pattern.search(aDateString)
      if m is None:
          return None
      dow, year, month, day, hour, minute, second, tz = m.groups()
      months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
      dateString = "%s, %s %s %s %s:%s:%s %s" % (dow, day, months[int(month) - 1], year, hour, minute, second, tz)
      tm = rfc822.parsedate_tz(dateString)
      if tm:
          return time.gmtime(rfc822.mktime_tz(tm))
docs: parse a date in yyyy/mm/dd hh:mm:ss TTT format