Bug #76032 [NEW]: DateTime->diff having issues with leap days

From: simon at welsh-au dot com Operating system: Linux PHP version: 7.2.2 Package: Date/time related Bug Type: Bug Bug description:DateTime->diff having issues with leap days Description: ------------ When in a timezone that's ahead of UTC, DateTime->diff seems to have issues when the starting date falls on a leap day in UTC. In the test script, changing the dates from March 1 to March 2 has both var_dump calls showing 10. Test script: --------------- <?php date_default_timezone_set('UTC'); $d = new DateTime('2008-03-01'); $a = new DateTime('2018-03-01'); var_dump($d->diff($a)->y); date_default_timezone_set('Europe/Amsterdam'); $d = new DateTime('2008-03-01'); $a = new DateTime('2018-03-01'); var_dump($d->diff($a)->y); Expected result: ---------------- int(10) int(10) Actual result: -------------- int(10) int(9) -- Edit bug report at https://bugs.php.net/bug.php?id=76032&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=76032&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=76032&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=76032&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=76032&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=76032&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=76032&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=76032&r=needscript Try newer version: https://bugs.php.net/fix.php?id=76032&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=76032&r=support Expected behavior: https://bugs.php.net/fix.php?id=76032&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=76032&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=76032&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=76032&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=76032&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=76032&r=dst IIS Stability: https://bugs.php.net/fix.php?id=76032&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=76032&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=76032&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=76032&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=76032&r=mysqlcfg