$month = '(Jan(?:uary)?|Feb(?:ruary)?|Mar(?:ch)?
              |Apr(?:il)?|May|Jun(?:e)?
              |Jul(?:y)?|Aug(?:ust)?|Sep(?:tember)?
              |Oct(?:ober)?|Nov(?:ember)?|Dec(?:ember)?)\s+';
  $day = '([0-3]?[0-9])(?:th|st|nd|rd)?,?\s+'; 
  $year = '([0-9]{2,4})';

##</code><code>##

if (( ($month, $day, $year) = (/$month$day$year/io) ) ||
    ( ($day, $month, $year) = (/$day$month$year/io) ) ) {
	$year += 1900 if $year < 100;
	$month = substr($month, 1, 3);
	print "$day-$month-$year\n";
}