start_date.setHours(start_date.getHours() + offsetHours); start_date.setMinutes(start_date.getMinutes() + offsetMinutes); start_date.setHours(start_date.getHours() + (-5)); start_date.setMinutes(start_date.getMinutes() + (0));*/
var diff = (end_date.getTime() - start_date.getTime()) / 1000;