JavaScript Dates & ServiceNow

[Omender Singh]

Hello ServiceNow Ninjas,

Javascript & ServiceNow scripting run hand in hand. We often use both in a mixed way such as using javascript API within Glide APIs or vice versa. And when it comes to dates I have faced a lot of confusion. 

In this article, I am providing a few basics of Javascript Dates that help in identifying, managing & using javascript date objects in a better way.

All below code snippets are tested in the background script.

1. Declare a new date object:-

var d = new Date();
gs.print(d);

*** Script: Thu Sep 08 2022 03:29:47 GMT-0700 (PDT)

2. You can initialize the date as well:-

var d = new Date(2018, 11, 24, 10, 33, 30, 0);
gs.print(d);

*** Script: Mon Dec 24 2018 10:33:30 GMT-0800 (PST)

3. A date object can be created using "date strings" as well:-

var d = new Date("October 13, 2014 11:13:00");
gs.print(d);

*** Script: Mon Oct 13 2014 11:13:00 GMT-0700 (PDT)

4. How to parse date? 

If you have a valid date string, you can use the Date. parse() method to convert it to milliseconds. Then milliseconds can be converted into a date object.

var d1 = Date.parse("March 21, 2012");
gs.print("Date1 - "+d1);
var d2 = new Date(d1);
gs.print("Date2 - "+d2);

*** Script: Date1 - 1332313200000
*** Script: Date2 - Wed Mar 21 2012 00:00:00 GMT-0700 (PDT)

5. Use the following methods to extract information from the date object:-

Method	Description
getFullYear()	Get the year as a four-digit number (yyyy)
getMonth()	Get the month as a number (0-11)
getDate()	Get the day as a number (1-31)
getHours()	Get the hour (0-23)
getMinutes()	Get the minute (0-59)
getSeconds()	Get the second (0-59)
getMilliseconds()	Get the millisecond (0-999)
getTime()	Get the time (milliseconds since January 1, 1970)
getDay()	Get the weekday as a number (0-6)
Date.now()	Get the time. ECMAScript 5.

var d = new Date();
gs.print(d.getFullYear());
gs.print(d.getMonth());
gs.print(d.getDate());
gs.print(d.getHours());

*** Script: 2022
*** Script: 8
*** Script: 8
*** Script: 3

I hope this will help you in getting an edge over Javascript date objects and functions.

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[subbaraop]

// Create a GlideDateTime object for the current time (in UTC by default)
var currentTime = new GlideDateTime();

// Convert the current time to the 'America/New_York' timezone
var estTime = new GlideDateTime(currentTime.getDisplayValue());
var timeZone = new GlideTimeZone();
estTime = timeZone.convertTimeZone(estTime, 'America/New_York');

// Create a GlideDateTime object for 4:30 PM today in EST
var fourThirtyPmToday = new GlideDateTime();
fourThirtyPmToday.setDisplayValue(estTime.getDate().getByFormat('yyyy-MM-dd') + ' 16:30:00');
fourThirtyPmToday = timeZone.convertTimeZone(fourThirtyPmToday, 'America/New_York');

// Create a GlideDateTime object for 11:00 PM today in EST
var elevenPmToday = new GlideDateTime();
elevenPmToday.setDisplayValue(estTime.getDate().getByFormat('yyyy-MM-dd') + ' 23:00:00');
elevenPmToday = timeZone.convertTimeZone(elevenPmToday, 'America/New_York');

// Check if the current time is between 4:30 PM and 11:00 PM EST
if (estTime.after(fourThirtyPmToday) && estTime.before(elevenPmToday)) {
gs.info("True: The current time is between 4:30 PM and 11:00 PM EST.");
return true;
} else {
gs.info("False: The current time is not between 4:30 PM and 11​⬤