Bug #74274 [Opn->Csd]: Handling DST transitions correctly

Edit report at https://bugs.php.net/bug.php?id=74274&edit=1 ID: 74274 Updated by: derick@php.net Reported by: heiglandreas@php.net Summary: Handling DST transitions correctly -Status: Open +Status: Closed Type: Bug Package: Date/time related Operating System: Irrelelvant PHP Version: 7.1.3 -Assigned To: +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: ------------------------------------------------------------------------ [2018-11-07 21:14:55] oliverpool at hotmail dot fr I found a simple test case where the DateInterval returned from diff looks quite strange (a complete day is missing): $tz = new DateTimeZone("Europe/Paris"); $startDate = new \DateTime('2018-10-28 00:00:00', $tz); $endDateBuggy = new \DateTime('2018-10-29 23:00:00', $tz); $endDateCorrect = new \DateTime('2018-10-29 22:59:59', $tz); // Buggy output print_r($startDate->diff($endDateBuggy)); /* DateInterval Object ( [y] => 0 [m] => 0 [d] => 2 [h] => -1 [i] => 0 [s] => 0 [f] => 0 [weekday] => 0 [weekday_behavior] => 0 [first_last_day_of] => 0 [invert] => 0 [days] => 1 ///////////////////// This is lower than [d]! This should be 2 [special_type] => 0 [special_amount] => 0 [have_weekday_relative] => 0 [have_special_relative] => 0 ) */ // Correct Output print_r($startDate->diff($endDateCorrect)); /* DateInterval Object ( [y] => 0 [m] => 0 [d] => 1 [h] => 22 [i] => 59 [s] => 59 [f] => 0 [weekday] => 0 [weekday_behavior] => 0 [first_last_day_of] => 0 [invert] => 0 [days] => 1 [special_type] => 0 [special_amount] => 0 [have_weekday_relative] => 0 [have_special_relative] => 0 ) */ This impacts Carbon: https://github.com/briannesbitt/Carbon/issues/1496 ------------------------------------------------------------------------ [2018-11-06 03:08:13] Jeremy at jcarnus dot fr Hi Is there a way to know when this will be solved ? Thanks ------------------------------------------------------------------------ [2017-04-05 11:48:54] requinix@php.net Related To: Bug #74374 ------------------------------------------------------------------------ [2017-03-19 12:10:06] heiglandreas@php.net Further related issues: https://bugs.php.net/bug.php?id=62331 https://bugs.php.net/bug.php?id=63311 https://bugs.php.net/bug.php?id=63459 https://bugs.php.net/bug.php?id=65811 https://bugs.php.net/bug.php?id=66187 https://bugs.php.net/bug.php?id=67269 https://bugs.php.net/bug.php?id=68286 https://bugs.php.net/bug.php?id=69943 https://bugs.php.net/bug.php?id=72255 https://bugs.php.net/bug.php?id=72398 https://bugs.php.net/bug.php?id=72486 Somewhat related but not actual duplicates: https://bugs.php.net/bug.php?id=73255 ------------------------------------------------------------------------ [2017-03-19 10:09:47] heiglandreas@php.net Description: ------------ A lot of issues have been tracked regarding DST-Transitions. There also has been an RFC in 2011 (https://wiki.php.net/rfc/datetime_and_daylight_saving_time) which seems to be not implemented yet. This is supposed to be a collection of all the issues that have been raised up to now that all revolve around the same thing: DateTime doesn't handle the transition from Daylight Saving Time back to Standard Time correctly. https://bugs.php.net/bug.php?id=51051 https://bugs.php.net/bug.php?id=61530 https://bugs.php.net/bug.php?id=62185 This is closely related to an often claimed feature request to evaluate the Timezone-Parameter when a Timezone-identifier is given in the datetime-string. That would allow DateTime to realize whether the given time is DaylightSavingTime or Standard-Time and be a much less error prone way than using 'DT' and 'ST' as described in the RFC. Related to this are: https://bugs.php.net/bug.php?id=61022 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=74274&edit=1