Calculate Due date using user defined schedules (#1894)

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Author: sivamuruganandam-coder

Core ServiceNow APIs/GlideDateTime/Calculate Due date using user defined schedules/README.md

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+**Description:**
+This  Script Include  calculates a future due date by adding a specified number of business days to a given start date, based on a defined schedule.
+This can be used anywhere within the server side scripts like fix scripts, background scripts, UI Action (server script).
+
+**Pre-requisite:**
+A schedule record with valid schedule entries should be created in the cmn_schedule table
+A business hours value per day need to be configured
+In this sample, the business hours per day is configured as 8 hours i.e 9AM - 5PM.
+
+**Sample:**
+var daysToAdd = 4; // No of days need to be added
+var script = new CaclculateDueDate().calculateDueDate(new GlideDateTime(),daysToAdd); // Passing the current date and daysToAdd value to script include
+gs.print(script);
+
+**Output:**
+*** Script: 2025-10-13 13:56:07

Core ServiceNow APIs/GlideDateTime/Calculate Due date using user defined schedules/script.js

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+var CaclculateDueDate = Class.create();
+CaclculateDueDate.prototype = {
+    initialize: function() {},
+
+    calculateDueDate: function(date, days_to_add) {
+        var business_hour_per_day = 8; // This can be stored in the system property (Value in Hours) and reused
+        var duration_script = new DurationCalculator(); // OOB Script include
+        var tz = gs.getSysTimeZone(); // Get the system timezone
+
+        duration_script.setSchedule('c798c1dfc3907e1091ea5242b40131c8', tz); // Sys id of the schedule
+        duration_script.setStartDateTime(new GlideDateTime(date));
+        var total_duration = days_to_add * (business_hour_per_day * 60 * 60); // Converting the days to seconds
+        duration_script.calcDuration(total_duration);
+
+        var calculated_due_date = duration_script.getEndDateTime();
+        return calculated_due_date.getDisplayValue();
+    },
+
+    type: 'CaclculateDueDate'
+};