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<?php echo date_default_timezone_get(); echo "\n\n"; $dateTime = new DateTime('2016-10-29 10:00:00'); // back one hour echo $dateTime->format(DateTime::RFC3339); echo "\n"; $dateTime->add(new DateInterval('PT23H')); echo $dateTime->format(DateTime::RFC3339); echo "\n\n"; $dateTime = new DateTime('2016-03-26 10:00:00'); // forward one hour echo $dateTime->format(DateTime::RFC3339); echo "\n"; $dateTime->add(new DateInterval('PT23H')); echo $dateTime->format(DateTime::RFC3339); echo "\n\n"; $dateTime = new DateTime('2016-05-26 10:00:00'); // no DST change echo $dateTime->format(DateTime::RFC3339); echo "\n"; $dateTime->add(new DateInterval('PT23H')); echo $dateTime->format(DateTime::RFC3339);
Output for git.master, git.master_jit, rfc.property-hooks
Europe/Amsterdam 2016-10-29T10:00:00+02:00 2016-10-30T08:00:00+01:00 2016-03-26T10:00:00+01:00 2016-03-27T10:00:00+02:00 2016-05-26T10:00:00+02:00 2016-05-27T09:00:00+02:00

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