--TEST-- Bug #65683 IntlDateFormatter accepts DateTimeImmutable --SKIPIF-- <?php if (!extension_loaded('intl')) die('skip intl extension not enabled'); ?> --FILE-- <?php $formatter = new IntlDateFormatter('en-US', IntlDateFormatter::FULL, IntlDateFormatter::NONE, new DateTimeZone("UTC")); var_dump($formatter->format(new DateTimeImmutable('2017-03-27 00:00:00 UTC'))) . "\n"; ?> ==DONE== --EXPECTF-- string(%s) "Monday, March %d, 2017" ==DONE==