Bug #74173 [Asn->Csd]: DateTimeImmutable::getTimestamp() triggers DST switch in incorrect time

Edit report at https://bugs.php.net/bug.php?id=74173&edit=1 ID: 74173 Updated by: derick@php.net Reported by: mailtomuller at gmail dot com Summary: DateTimeImmutable::getTimestamp() triggers DST switch in incorrect time -Status: Assigned +Status: Closed Type: Bug Package: Date/time related Operating System: Debian PHP Version: 5.6.30 Assigned To: derick Block user comment: N Private report: N New Comment: The fix for this bug has been committed. If you are still experiencing this bug, try to check out latest source from https://github.com/php/php-src and re-test. Thank you for the report, and for helping us make PHP better. Fixed for PHP 8.1. Previous Comments: ------------------------------------------------------------------------ [2017-02-27 14:56:11] mailtomuller at gmail dot com The possibly related bug is https://bugs.php.net/bug.php?id=67634 , I crosspasted the links. ------------------------------------------------------------------------ [2017-02-27 10:55:38] mailtomuller at gmail dot com step #4 in the description should be call getTimestamp(), not getTimeZone() ------------------------------------------------------------------------ [2017-02-27 10:53:52] mailtomuller at gmail dot com Description: ------------ All PHP versions affected: 5.6.0 - 5.6.30, 7.0.0 - 7.1.2 - create DateTimeImmutable in UTC, hour before the actual DST switch - change its timezone to Europe/Prague that observes DST - absolute date/time stays the same, UTC offset is correctly changed - call getTimeZone() on the instance - the offset moves as if it went past the DST switch Might be related to https://bugs.php.net/bug.php?id=65502 Online test script: https://3v4l.org/pQaKo Expected: 2016-10-30T02:00:00+02:00 2016-10-30T02:00:00+02:00 Actual: 2016-10-30T02:00:00+02:00 2016-10-30T02:00:00+01:00 Test script: --------------- <?php $utc = new \DateTimeImmutable('2016-10-30T00:00:00+00:0'); // reproduces too: // $utc = new \DateTimeImmutable('2016-10-30T00:00:00', new \DateTimeZone('UTC')); // $utc = new \DateTimeImmutable('2016-10-30T00:00:00+00:0'); $prg = $utc->setTimeZone(new \DateTimeZone('Europe/Prague')); echo $prg->format('c') . "\n"; $prg->getTimestamp(); echo $prg->format('c') . "\n"; Expected result: ---------------- 2016-10-30T02:00:00+02:00 2016-10-30T02:00:00+02:00 Actual result: -------------- 2016-10-30T02:00:00+02:00 2016-10-30T02:00:00+01:00 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=74173&edit=1