- substr: documentation ( source)
- var_dump: documentation ( source)
- date: documentation ( source)
<?php
$d = new \DateTime('2016-03-31T00:00:04.917180', new \DateTimeZone('America/New_York'));
$d->setTimezone(new \DateTimeZone('UTC'));
echo $d->format('Y-m-d H:i:s') . ' ' . $d->getTimestamp();
var_dump(date('y-m-d H:i:s', substr(1459382404753609, 0, strlen(1459396804))));