Bug #77741 [Asn->Nab]: DateTimeZone/setTimezone returns wrong values

Edit report at https://bugs.php.net/bug.php?id=77741&edit=1 ID: 77741 Updated by: cmb@php.net Reported by: info at akebono dot nl Summary: DateTimeZone/setTimezone returns wrong values -Status: Assigned +Status: Not a bug Type: Bug Package: Date/time related Operating System: Windows 10 PHP Version: 7.2.16 -Assigned To: derick +Assigned To: cmb Block user comment: N Private report: N New Comment: PST is UTC-8, and Europe/Amsterdam on 2019-3-20T23:59:00 is UTC+1, so nine hours difference are to be expected. PDT is also UTC-8 for the date extension, so the actual result is to be expected. Note also that[1]: | Please do not use any of the timezones listed here (besides | UTC), they only exist for backward compatible reasons, and may | expose erroneous behavior. [1] <https://www.php.net/manual/en/timezones.others.php> Previous Comments: ------------------------------------------------------------------------ [2019-03-16 15:31:08] girgias@php.net Seems like PHP assumes the transition from Standard time to Summertime occurs at the same time which is not the case with EU/USA. Can you confirm this @derick? ------------------------------------------------------------------------ [2019-03-14 12:32:09] info at akebono dot nl Description: ------------ Wrong value output. It does not matter whether TimeZoneNameFrom is set to PST or PDT. Test script: --------------- TimeZoneNameFrom = 'PST'; TimeZoneNameTo = 'Europe/Amsterdam'; TimeStr = '2019-3-20 23:59:00'; $convertedTime = date_create($TimeStr, new DateTimeZone($TimeZoneNameFrom))->setTimezone(new DateTimeZone($TimeZoneNameTo))->format("j F H.i"); Expected result: ---------------- 21 March 07.59 CET Actual result: -------------- 21 March 08.59 CET ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=77741&edit=1