$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})';