Bug #74524 [NEW]: Date diff is bad calculated, in same time zone

From: kalita dot michal at gmail dot com Operating system: Linux PHP version: 7.1.4 Package: Date/time related Bug Type: Bug Bug description:Date diff is bad calculated, in same time zone Description: ------------ Calculated diff is 7 months, 14 days and -1 hour. It doen't make sense, why it is not 7 months, 13 days and 23 hours. This bug is in versions 5.4.45, 5.6.30, 7 and newest. (https://3v4l.org/6OOuG) Test script: --------------- $a = new DateTime("2017-11-17 22:05:26.000000"); $b = new DateTime("2017-04-03 22:29:15.079459"); $diff = $a->diff($b); return $diff->h; Expected result: ---------------- 23 Actual result: -------------- -1 -- Edit bug report at https://bugs.php.net/bug.php?id=74524&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=74524&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=74524&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=74524&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=74524&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=74524&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=74524&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=74524&r=needscript Try newer version: https://bugs.php.net/fix.php?id=74524&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=74524&r=support Expected behavior: https://bugs.php.net/fix.php?id=74524&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=74524&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=74524&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=74524&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=74524&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=74524&r=dst IIS Stability: https://bugs.php.net/fix.php?id=74524&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=74524&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=74524&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=74524&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=74524&r=mysqlcfg