zendframework/zf2 — pull request #4720 by intellix (2013-06-25 08:10:35+00:00)
Title: Update FormDateSelect and FormMonthSelect to support 5.3.3 as is recommended in composer.json

Support for passing in a DateTime object was only added in 5.3.4.
http://www.php.net/manual/en/intldateformatter.format.php