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>'; -- PHP Windows Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php