\b\d{4}[\-/](0?[1-9]|1[0-2]|(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)?)\-\d{4}[\-/](0?[1-9]|1[0-2]|(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