Bug #66453 [NEW]: Datetime modify bad result

From: mail at piotrantosik dot com Operating system: Linux PHP version: 5.5.7 Package: *Calendar problems Bug Type: Bug Bug description:Datetime modify bad result Description: ------------ DateTime object return non exist day in calendar. Test script: --------------- $d = new \DateTime('2014-01-08'); $d->modify('-8 day'); Expected result: ---------------- echo $d->format('Y-m-d')) //2013-12-30 Actual result: -------------- echo $d->format('Y-m-d')) //2013-12-31 -- Edit bug report at https://bugs.php.net/bug.php?id=66453&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=66453&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=66453&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=66453&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=66453&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=66453&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=66453&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=66453&r=needscript Try newer version: https://bugs.php.net/fix.php?id=66453&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=66453&r=support Expected behavior: https://bugs.php.net/fix.php?id=66453&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=66453&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=66453&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=66453&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=66453&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=66453&r=dst IIS Stability: https://bugs.php.net/fix.php?id=66453&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=66453&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=66453&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=66453&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=66453&r=mysqlcfg