Bug #80974 [Com]: Wrong diff between 2 dates in different timezones

Edit report at https://bugs.php.net/bug.php?id=80974&edit=1 ID: 80974 Comment by: corey dot taylor dot fl at gmail dot com Reported by: kylekatarnls at gmail dot com Summary: Wrong diff between 2 dates in different timezones Status: Assigned Type: Bug Package: Date/time related Operating System: Ubuntu PHP Version: master-Git-2021-04-21 (Git) Assigned To: derick Block user comment: N Private report: N New Comment: I assume this is related since it was closed with the large patch from derick. https://bugs.php.net/bug.php?id=79452 Previous Comments: ------------------------------------------------------------------------ [2021-04-22 09:50:36] cmb@php.net The following pull request has been associated: Patch Name: Fix #80974: Wrong diff between 2 dates in different timezones On GitHub: https://github.com/php/php-src/pull/6896 Patch: https://github.com/php/php-src/pull/6896.patch ------------------------------------------------------------------------ [2021-04-21 22:00:40] kylekatarnls at gmail dot com Description: ------------ In PHP < 8.1, comparing 2 date-times from different timezones would consider the real moment they represent to return the diff, which is completly relevant. But it's no longer true (sounds like introduced by 091c0920b9db057a54dc43ece6e864bce6818d5e). Test script: --------------- $dtToronto = new DateTime('2012-01-01 00:00:00.000000 America/Toronto'); $dtVancouver = new DateTime('2012-01-01 00:00:00.000000 America/Vancouver'); echo $dtVancouver->diff($dtToronto)->format('%h'); Expected result: ---------------- 3 Actual result: -------------- 0 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=80974&edit=1