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<?php date_default_timezone_set('Europe/Prague'); $d = new DateTime('@-21474836470'); $d->setTimezone(new DateTimeZone(date_default_timezone_get())); echo $d->format('c'); echo "\n"; echo $d->format('U'); echo "\n"; $d = new DateTime('1289-06-27 15:58:22'); echo $d->format('c'); echo "\n"; echo $d->format('U');
Output for git.master, git.master_jit, rfc.property-hooks
1289-06-27T16:36:34+00:57 -21474836470 1289-06-27T15:58:22+00:57 -21474838762

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