3v4l.org

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<?php $week_number = 53; $year = 2013; for($day=1; $day<=7; $day++) { echo date('m/d/Y', strtotime($year."W".$week_number.$day))."\n"; } ?>
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.31, 7.1.0 - 7.1.23, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
12/30/2013 12/31/2013 01/01/2014 01/02/2014 01/03/2014 01/04/2014 01/05/2014
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
01/01/1970 01/01/1970 01/01/1970 01/01/1970 01/01/1970 01/01/1970 01/01/1970
preferences:
258.34 ms | 401 KiB | 416 Q