Bug #77232 [NEW]: Wrong week of month for 2018-12-31

From: uli dot staerk at dc1 dot com Operating system: Linux PHP version: 7.0.32 Package: Date/time related Bug Type: Bug Bug description:Wrong week of month for 2018-12-31 Description: ------------ The output for date("Y/W") is not correct for 2018-12-31! Test script: --------------- php > echo date("Y/W", strtotime('2018-12-30')); 2018/52 php > echo date("Y/W", strtotime('2018-12-31')); 2018/01 php > echo date("Y/W", strtotime('2019-01-01')); 2019/01 Expected result: ---------------- php > echo date("Y/W", strtotime('2018-12-31')); 2019/01 Actual result: -------------- php > echo date("Y/W", strtotime('2018-12-31')); 2018/01 -- Edit bug report at https://bugs.php.net/bug.php?id=77232&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=77232&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=77232&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=77232&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=77232&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=77232&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=77232&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=77232&r=needscript Try newer version: https://bugs.php.net/fix.php?id=77232&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=77232&r=support Expected behavior: https://bugs.php.net/fix.php?id=77232&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=77232&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=77232&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=77232&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77232&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=77232&r=dst IIS Stability: https://bugs.php.net/fix.php?id=77232&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=77232&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=77232&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=77232&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=77232&r=mysqlcfg