<?php $start = 1552211999; $dt = new DateTime('@'.$start); $dt->setTimezone(new DateTimeZone('America/Los_Angeles')); $dt->modify('+1 day');
Standard input is empty
object(DateTime)#1 (3) {
["date"]=>
string(26) "2019-03-10 01:59:59.000000"
["timezone_type"]=>
int(3)
["timezone"]=>
string(19) "America/Los_Angeles"
}
object(DateTime)#1 (3) {
["date"]=>
string(26) "2019-03-11 01:59:59.000000"
["timezone_type"]=>
int(3)
["timezone"]=>
string(19) "America/Los_Angeles"
}