DateTime wierdness

Can someone explain to me this weierdness I see when using the DateTime module of PHP. Here I send 14/14/2012 which is not a valid date, and I would expect to recieve false, but instead, it looks like it wrapping to the next year, as if 14 monthas are 1 year and 2 months. That isn't what's supposed to happen, or is it? $ echo "<?php var_dump(DateTime::createFromFormat('j/n/Y', '14/14/2012')); ?> "|php object(DateTime)#1 (3) { ["date"]=> string(19) "2013-02-14 13:20:22" ["timezone_type"]=> int(3) ["timezone"]=> string(20) "America/Buenos_Aires" } -- Martín Marqués select 'martin.marques' || '@' || 'gmail.com' DBA, Programador, Administrador