ServiceNow Script Include, called by Client Script. This script calculates the difference between the current date and a date passed in as a parameter using 8X5 Business Workday Schedule.

AjaxDateDiffCalcBusDays.js

/*
* Called by Client Script. This script calculates the difference between the current date and a date passed in as a parameter
* using 8X5 Business Workday Schedule.
*/
var AjaxDateDiffCalcBusDays = Class.create();
AjaxDateDiffCalcBusDays.prototype = Object.extendsObject(AbstractAjaxProcessor, {
 dateDiffNow: function()
{
 // Get Catalog Item
 var cat = new GlideRecord('sc_cat_item');
 cat.addQuery('sys_id',this.getParameter('sysparm_itemID'));
 cat.query();
 cat.next();
 // Get Catalog Item Delivery Time Duration
 var deliveryTime = new Packages.com.glide.glideobject.GlideDuration();
 deliveryTime.setValue(cat.delivery_time);
 // Get Number of Days from Delivery Time (Milliseconds)
 var deliveryTimeDays = deliveryTime.getNumericValue() / 86400000; //60*60*24*1000 = 1 day in milliseconds
 // Get the User Timezone
 var usr = new GlideRecord('sys_user');
 usr.get(gs.getUserID());
 var usrTZ = usr.time_zone;
 // If User Timezone is Empty Get Timezone from System Default
 if (usrTZ == '')
 {
 usrTZ = gs.getProperty("glide.sys.default.tz");
 }
 // Create schedule - pass in the sys_id of your standard 8X5 work day schedule and pass in the users timezone
 var sched = new Packages.com.glide.schedules.Schedule('08fcd0830a0a0b2600079f56b1adb9ae',usrTZ);
 // Calculate Delivery Date using 8X5 Business Working Hours Schedule
 // specify the number of milliseconds to add, based on calendar
 // this will add 1000ms*60sec*60mins*8hour(biz hours in a day)*(Catlog Item delivery days)
 // the calculation makes more sense if you think of it as how many business hours to add, Not days.
 var duration = new Packages.com.glide.glideobject.GlideDuration();
 duration.setValue(1000*60*60*8*deliveryTimeDays);
 var actualDateTime = new Packages.com.glide.glideobject.GlideDateTime();
 var calcDeliverDateTime = new Packages.com.glide.glideobject.GlideDateTime();
 actualDateTime.setDisplayValue(gs.nowDateTime());
 calcDeliverDateTime.setValue(sched.add(actualDateTime,duration));
 var diff = gs.dateDiff(calcDeliverDateTime, this.getParameter('sysparm_newDate'), true);
 return diff;
}
});