#30357 [Bgs]: Date function returns incorrect results

ID: 30357 Updated by: derick@php.net Reported By: vidya at webwisesage dot com Status: Bogus Bug Type: Date/time related Operating System: Unix PHP Version: 4.3.8 New Comment: We are happy to tell you that you just discovered Daylight Savings Time. For more information see: http://webexhibits.org/daylightsaving/b.html Instead of using mktime/date consider using gmmktime and gmdate which do not suffer from DST. Previous Comments: ------------------------------------------------------------------------ [2004-10-08 06:41:04] gschlossnagle@php.net Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php congratulations, you\'ve discovered daylight savings time! ------------------------------------------------------------------------ [2004-10-08 06:35:18] vidya at webwisesage dot com Description: ------------ I wrote a little program below that shows the problem. This simply adds 1 day to the date and prints the date. At Oct 31st, 2004, it prints 2004-10-31 TWICE. In other words, the date function is returning an incorrect result. Reproduce code: --------------- <?php define("ONEDAY",86400); // seconds in a day $startdate = "20041001"; $timestamp = strtotime($startdate); for($i=0; $i<95; $i++): $timestamp = $timestamp + ONEDAY; $workingdate = date("Y-m-d",$timestamp); echo("NEXT DAY IS $workingdate <br>"); endfor; ?> Expected result: ---------------- All dates from 10-02-2004 until 01-02-2005 printed one after the other in sequence. Actual result: -------------- NEXT DAY IS 2004-10-26 NEXT DAY IS 2004-10-27 NEXT DAY IS 2004-10-28 NEXT DAY IS 2004-10-29 NEXT DAY IS 2004-10-30 NEXT DAY IS 2004-10-31 NEXT DAY IS 2004-10-31 NEXT DAY IS 2004-11-01 NEXT DAY IS 2004-11-02 NEXT DAY IS 2004-11-03 NEXT DAY IS 2004-11-04 NEXT DAY IS 2004-11-05 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=30357&edit=1