Bug #52152 [Opn->Wfx]: DST detection works wrong with late dates (TS over int32)

Edit report at https://bugs.php.net/bug.php?id=52152&edit=1 ID: 52152 Updated by: heiglandreas@php.net Reported by: danikas2k2 at gmail dot com Summary: DST detection works wrong with late dates (TS over int32) -Status: Open +Status: Wont fix Type: Bug Package: Date/time related Operating System: Ubuntu i686 2.6.32-22-generic PHP Version: 5.3.2 Block user comment: N Private report: N New Comment: DST information is provided by IANAs timezonedb. That DB is considered accurate only with in half a year. No one knows whether a certain area still has DST within the next 10 years, So requesting that information 40 years in advance needs to result in a wrong information. You can NOT relly on that as it is subject to change on short notice. Depending on your use-case you should consider a different approach. Previous Comments: ------------------------------------------------------------------------ [2010-06-23 07:29:56] danikas2k2 at gmail dot com Description: ------------ DST detection for late dates (timestamp over int32) Test script: --------------- $date = new DateTime('2020-05-25 12:00:00', new DateTimeZone('Europe/Warsaw')); echo $date->format(DateTime::ATOM), ' ', $date->format('I U'); $date = new DateTime('2050-05-25 12:00:00', new DateTimeZone('Europe/Warsaw')); echo $date->format(DateTime::ATOM), ' ', $date->format('I U'); Expected result: ---------------- 2020-05-25T12:00:00+02:00 1 1590400800 2050-05-25T12:00:00+02:00 1 2537089200 Actual result: -------------- 2020-05-25T12:00:00+02:00 1 1590400800 2050-05-25T12:00:00+01:00 0 2537089200 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=52152&edit=1