now.setTime(now.getTime() - 2 * 24 * 60 * 60 * 1000);

function getDeliveryDateObj(businessDaysLeftForDelivery) {
  var now = new Date();
  now.setTime(now.getTime() - 2 * 24 * 60 * 60 * 1000);
  var dayOfTheWeek = now.getDay();
  var calendarDays = businessDaysLeftForDelivery;
  var deliveryDay = dayOfTheWeek + businessDaysLeftForDelivery;
  if (deliveryDay >= 6) {
    businessDaysLeftForDelivery -= 6 - dayOfTheWeek;  //deduct this-week days
	calendarDays += 2;  //count this coming weekend
	deliveryWeeks = Math.floor(businessDaysLeftForDelivery / 5); //how many whole weeks?
	calendarDays += deliveryWeeks * 2;  //two days per weekend per week
  }
  now.setTime(now.getTime() + calendarDays * 24 * 60 * 60 * 1000);
  return now;
}

Click here to get the delivery date in 8 business days, starting from the day before yesterday.

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