note 117963 added to datetime.add

When a datetime object has date '2012-01-30', we have the following object: object(DateTime)#1233 (3) { ["date"]=> string(19) "2012-01-30 00:00:00" ["timezone_type"]=> int(3) ["timezone"]=> string(9) "ETC/GMT+3" } But, when a month is added: $date->add(new DateInterval('P1M')); It will result the following object: object(DateTime)#1233 (3) { ["date"]=> string(19) "2012-03-01 00:00:00" ["timezone_type"]=> int(3) ["timezone"]=> string(9) "ETC/GMT+3" } It should add a month, so the date to be displayed should be '2012-02-28', therefore february of 2012, instead of march of 2012. ---- Server IP: 72.52.91.14 Probable Submitter: 177.19.136.2 ---- Manual Page -- http://php.net/manual/en/datetime.add.php Edit -- https://master.php.net/note/edit/117963 Del: integrated -- https://master.php.net/note/delete/117963/integrated Del: useless -- https://master.php.net/note/delete/117963/useless Del: bad code -- https://master.php.net/note/delete/117963/bad+code Del: spam -- https://master.php.net/note/delete/117963/spam Del: non-english -- https://master.php.net/note/delete/117963/non-english Del: in docs -- https://master.php.net/note/delete/117963/in+docs Del: other reasons-- https://master.php.net/note/delete/117963 Reject -- https://master.php.net/note/reject/117963 Search -- https://master.php.net/manage/user-notes.php