3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $xmas = new DateTime('+24 day first day of december this year'); echo $xmas->format('Ymd');
based on gO6kU
Output for 5.3.19 - 5.4.45, 5.6.28, 7.0.20 - 7.2.0
20151201
Output for 5.5.24 - 5.6.21, 7.0.0 - 7.0.6
20161201