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<?php //set timezone to UTC to disregard daylight savings ini_set('date.timezone', 'America/New_York'); $date1 = new \DateTime('2006-01-01T12:00:00'); $date2 = new \DateTime('2006-06-01T12:00:00'); $interval = new \DateInterval('PT1H'); $periods = new \DatePeriod($date1, $interval, $date2); $hours = iterator_count($periods); echo $hours . ' hours';
Output for git.master, git.master_jit, rfc.property-hooks
3623 hours

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