1992-10-22T00:00:00.000Z code example
Example: 1992-10-22T00:00:00.000Z
echo date('c'); //2021-02-03T21:42:51-08:00
echo date(DATE_ISO8601); //2021-02-03T21:42:51-0800
$datetime = new DateTime();
echo $datetime->format(DateTime::ATOM); //2021-02-03T21:42:51-08:00