in js/helpdesk-sla/time-operations.js [18:26]
var isWithinBusinessHours = function(date) {
var date1 = new Date(date);
var dayOfWeek = date1.getDay();
if (dayOfWeek === 0 || dayOfWeek === 1) {
return false;
}
var hour = date1.getHours();
return (hour >= START && hour < FINISH);
};