note 77130 added to function.mktime

Hello, im found some strange behaviour. Someone knows whats is going on or it is a bug?: lets do like this: three dates in timestamp: 27.10.2007: 1193436000 28.10.2007: 1193522400 29.10.2007: 1193612400 convert back: 1193436000: 27.10.2007 00:00:00 1193522400: 28.10.2007 00:00:00 1193612400: 29.10.2007 00:00:00 And one day is always 24 hours * 60 minutes * 60 secondes = 86400. So the difference between these three dates in timestamp should also be the same.But: day2-day1 = 86400 day3-day2 = 90000 Here is my code, im using PHP Version 5.1.6: echo ' three dates in timestamp: <br>'; $day1 = mktime(0, 0, 0, 10, 27, 2007); $day2 = mktime(0, 0, 0, 10, 28, 2007); $day3 = mktime(0, 0, 0, 10, 29, 2007); echo '27.10.2007: '.$day1.'<br>'; echo '28.10.2007: '.$day2.'<br>'; echo '29.10.2007: '.$day3.'<br><br>'; echo 'convert back: <br>'; echo $day1.': '.date('d.m.Y H:i:s',$day1).'<br>'; echo $day2.': '.date('d.m.Y H:i:s',$day2).'<br>'; echo $day3.': '.date('d.m.Y H:i:s',$day3).'<br><br><br>'; echo 'And one day is always 24 hours * 60 minutes * 60 secondes = 86400. So the difference between these three dates in timestamp should also be the same.But: <br>'; echo 'day2-day1 = '.($day2-$day1).'<br>'; echo 'day3-day2 = '.($day3-$day2).'<br>'; ---- Server IP: 91.185.195.14 Probable Submitter: 213.250.30.129 ---- Manual Page -- http://www.php.net/manual/en/function.mktime.php Edit -- https://master.php.net/note/edit/77130 Del: integrated -- https://master.php.net/note/delete/77130/integrated Del: useless -- https://master.php.net/note/delete/77130/useless Del: bad code -- https://master.php.net/note/delete/77130/bad+code Del: spam -- https://master.php.net/note/delete/77130/spam Del: non-english -- https://master.php.net/note/delete/77130/non-english Del: in docs -- https://master.php.net/note/delete/77130/in+docs Del: other reasons-- https://master.php.net/note/delete/77130 Reject -- https://master.php.net/note/reject/77130 Search -- https://master.php.net/manage/user-notes.php