#42842 [Com]: dst information lost over Year 2038

ID: 42842 Comment by: judas dot iscariote at gmail dot com Reported By: giewont at gmail dot com Status: Open Bug Type: Date/time related Operating System: Windows NT 5.1 build 2600 PHP Version: 5.2.4 New Comment: Please read http://en.wikipedia.org/wiki/Year_2038_problem to know the cause. Previous Comments: ------------------------------------------------------------------------ [2007-10-03 16:01:14] giewont at gmail dot com Description: ------------ When I create DateTime object using UTC and then switch to timezone with DST eg. 'Europe/Warsaw' and i set Year to any after 2038 the DST doesn't work. like below: in may Warsaw is in GMT+2 time zone so when i set UTC time to 12:00:00 time in Warsaw should be 02:00:00 (14:00:00) Reproduce code: --------------- date_default_timezone_set('Europe/Warsaw'); $gmt = timezone_open('UTC'); $eu = timezone_open('Europe/Warsaw'); $date = new DateTime('2040-05-05 12:00:00', $gmt); echo $date->format('d-m-Y h:i:s') . '(' . $date->getTimezone()->getName() . ')<br>'; $date->setTimezone($eu); echo $date->format('d-m-Y h:i:s') . '(' . $date->getTimezone()->getName() . ')<br>'; $date->setTimezone($gmt); $date = new DateTime('2000-05-05 12:00:00', $gmt); echo $date->format('d-m-Y h:i:s') . '(' . $date->getTimezone()->getName() . ')<br>'; $date->setTimezone($eu); echo $date->format('d-m-Y h:i:s') . '(' . $date->getTimezone()->getName() . ')<br>'; $date->setTimezone($gmt); Expected result: ---------------- 05-05-2040 12:00:00(UTC) 05-05-2040 02:00:00(Europe/Warsaw) 05-05-2000 12:00:00(UTC) 05-05-2000 02:00:00(Europe/Warsaw) Actual result: -------------- 05-05-2040 12:00:00(UTC) 05-05-2040 01:00:00(Europe/Warsaw) 05-05-2000 12:00:00(UTC) 05-05-2000 02:00:00(Europe/Warsaw) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=42842&edit=1