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<?php $tz = new DateTimeZone('Europe/Prague'); $dt = new DateTimeImmutable('2014-03-30 01:00:00', $tz); var_dump($dt->format(DATE_ISO8601)); var_dump($dt->modify('+1 hour')->format(DATE_ISO8601));
Output for git.master, git.master_jit, rfc.property-hooks
string(24) "2014-03-30T01:00:00+0100" string(24) "2014-03-30T03:00:00+0200"

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