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<?php function isDST(\DateTime $date){ return $date->getTimezone()->getTransitions($date->getTimestamp(), $date->getTimestamp())[0]['isdst']; } $date = new \DateTime('2014-03-6', new \DateTimeZone('America/New_York')); var_dump(isDST($date)); $date = new \DateTime('2014-03-8', new \DateTimeZone('America/New_York')); var_dump(isDST($date));
Output for git.master, git.master_jit, rfc.property-hooks
bool(false) bool(false)

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