- var_dump: documentation ( source)
<?php
$timezoneDST = new DateTimeZone('America/New_York');
$date = new DateTime("2020-11-01", $timezoneDST);
$dateInterval = new DateInterval('PT15M');
$counter = 0;
while($counter < 500){
$date->add($dateInterval);
$counter++;
}
var_dump($date);