\b(1st|2nd|3rd|4th|5th|6th|7th|8th|9th|10th|11th|12th|13th|14th|15th|16th|17th|18th|19th|20th|21st|22nd|23rd|24th|25th|26th|27th|28th|29th|30th|31st|32nd|33rd|34th|35th|36th|37th|38th|39th|40th|41st|42nd|43rd|44th|45th|46th|47th|48th|49th|50th)\sof\s((J|j)an(uary)?|JAN(UARY)?|(F|f)eb(ruary)?|FEB(RUARY)?|(M|m)ar(ch)?|MAR(CH)?|(A|a)pr(il)?|APR(IL)?|May|MAY|(J|j)un(e)?|JUN(E)?|(J|j)ul(y)?|JUL(Y)?|(A|a)ug(ust)?|AUG(UST)?|(S|s)ep(tember)?|SEP(TEMBER)?|SEPT|Sept|(O|o)ct(ober)?|OCT(OBER)?|(N|n)ov(ember)?|NOV(EMBER)?|(D|d)ec(ember)?|DEC(EMBER)?)\b