note 88404 added to function.strtotime

I'm trying to add 29 years to the current date <?php list($m,$d,$y) = explode('-',date('m-d-Y')); $now = mktime(0, 0, 0, $m, $d, $y); $expires = strtotime("+29 year",$now); $_ = date("m-d-Y", intval($expires)); echo 'Expires on '.$_; ?> Result is 'Expires on 01-01-1970' The same code but with "+28 year" produces the expected rusult 'Expires on 01-22-2037'. Where is the problem? What have I missed? (php 5.2.6) ---- Server IP: 91.196.196.205 Probable Submitter: 94.178.96.64 ---- Manual Page -- http://www.php.net/manual/en/function.strtotime.php Edit -- https://master.php.net/note/edit/88404 Del: integrated -- https://master.php.net/note/delete/88404/integrated Del: useless -- https://master.php.net/note/delete/88404/useless Del: bad code -- https://master.php.net/note/delete/88404/bad+code Del: spam -- https://master.php.net/note/delete/88404/spam Del: non-english -- https://master.php.net/note/delete/88404/non-english Del: in docs -- https://master.php.net/note/delete/88404/in+docs Del: other reasons-- https://master.php.net/note/delete/88404 Reject -- https://master.php.net/note/reject/88404 Search -- https://master.php.net/manage/user-notes.php