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<?php $dateTime = new DateTimeImmutable('2014-10-26 01:00:00', new DateTimeZone('Europe/Berlin'));var_dump($dateTime->format(DATE_ISO8601));$test = $dateTime->modify('+61 minutes');var_dump($test->format(DATE_ISO8601));$test = $dateTime->modify('+121 minutes');var_dump($test->format(DATE_ISO8601));

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