php-workaround.php
A list of PHP timezones that were supported until 5.5.9, removed in PHP 5.5.10 and re-introduced in PHP 5.5.17.
DateTimeZone::listIdentifiers(DateTimeZone::ALL_WITH_BC) returns them, but they are invalid for new DateTimeZone(). Fixed in PHP 5.5.17. https://bugs.php.net/bug.php?id=66985
Some more info here: http://evertpot.com/php-5-5-10-timezone-changes/