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<?php $tz = new DateTimeZone('Europe/Prague'); $dt = new DateTimeImmutable('2014-10-26 01:00:00', $tz); var_dump($dt); var_dump($dt->modify('+1 hour')->format(DATE_ISO8601));
Output for git.master, git.master_jit, rfc.property-hooks
object(DateTimeImmutable)#2 (3) { ["date"]=> string(26) "2014-10-26 01:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(13) "Europe/Prague" } string(24) "2014-10-26T02:00:00+0200"

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