Bug #53370 [NEW]: Some relative date/time format returns incorrect result at the end of DST

From: Operating system: Linux and MacOSX PHP version: 5.3.3 Package: Date/time related Bug Type: Bug Bug description:Some relative date/time format returns incorrect result at the end of DST Description: ------------ Relative date/time format '+[number]sec', '+[number]min', '+[number]hour' returns incorrect time when the current time is in daylight saving time and the result of calculation is non-daylight saving time. For example, daylight saving time of this year in the USA was started at 2010-03-14 02:00:00, and finished at 2010-11-07 02:00:00. However, '2010-11-07 01:59:59 +1sec' advance to 3601 sec after. Test script: --------------- <?php date_default_timezone_set('America/Los_Angeles'); echo date("c", strtotime("2010-03-14 01:59:59")) . PHP_EOL; echo date("c", strtotime("2010-03-14 01:59:59 +1sec")) . PHP_EOL; echo date("c", strtotime("2010-11-07 01:59:59")) . PHP_EOL; echo date("c", strtotime("2010-11-07 01:59:59 +1sec")) . PHP_EOL; Expected result: ---------------- 2010-03-14T01:59:59-08:00 2010-03-14T03:00:00-07:00 2010-11-07T01:59:59-07:00 2010-11-07T01:00:00-08:00 Actual result: -------------- 2010-03-14T01:59:59-08:00 2010-03-14T03:00:00-07:00 2010-11-07T01:59:59-07:00 2010-11-07T02:00:00-08:00 -- Edit bug report at http://bugs.php.net/bug.php?id=53370&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=53370&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=53370&r=trysnapshot53 Try a snapshot (trunk): http://bugs.php.net/fix.php?id=53370&r=trysnapshottrunk Fixed in SVN: http://bugs.php.net/fix.php?id=53370&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=53370&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=53370&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=53370&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=53370&r=needscript Try newer version: http://bugs.php.net/fix.php?id=53370&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=53370&r=support Expected behavior: http://bugs.php.net/fix.php?id=53370&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=53370&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=53370&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=53370&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=53370&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=53370&r=dst IIS Stability: http://bugs.php.net/fix.php?id=53370&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=53370&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=53370&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=53370&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=53370&r=mysqlcfg