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<?php $tz = new DateTimeZone('America/Chicago'); // A timezone that has DST $five_hours_interval = new DateInterval('PT5H'); $date = new DateTime("2019-11-03 00:00:00", $tz); // goes backward at 2am echo $date->format('c') . "\n"; // Add five hours and subtract 5 hours. The $newDate should then equal the date. $five_hours_later = $date->add($five_hours_interval); $newDate = $five_hours_later->sub($five_hours_interval); echo $newDate->format('c');
Output for git.master, git.master_jit, rfc.property-hooks
2019-11-03T00:00:00-05:00 2019-11-03T00:00:00-05:00

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