function addHoursToDate(hours, date = new Date()) {
date.setTime(date.getTime() + hours * 60 * 60 * 1000);
return date;
}
const date = new Date('2022-03-12T08:52:21');
console.log(addHoursToDate(5, date).toString());
/*
run:
"Sat Mar 12 2022 13:52:21 GMT+0200 (Israel Standard Time)"
*/