JavaScript Date Calculation: Computing the Difference Between Two Dates

In this comprehensive tutorial, we delve into the process of calculating the difference between two dates using JavaScript.

Understanding date calculations is essential for various web development projects, and with the methods and techniques covered in this tutorial, you’ll gain the necessary expertise to accomplish this task effortlessly.

JavaScript gives you a comprehensive set of tools to work on dates, times, and other information which makes it simple to calculate differences between dates. In the article below we’ll examine different methods and strategies to calculate date differences by using JavaScript

The Date Object in JavaScript

JavaScript comes with an inbuilt Date object that enables users to manipulate dates as well as times. You can create new Date objects by using the new Date() constructor and using various parameters like the year month or day and hour, minute, second, millisecond and more. Here’s an example of how:

const date1 = new Date('30/09/2023');
const date2 = new Date('10/09/2023');

Calculating Date Differences

One way of calculating date differences is to convert dates to timestamps (milliseconds since January 1, 1970) and subtract them one from another. Here’s an example:

const timestamp1 = date1.getTime();
const timestamp2 = date2.getTime();
const differenceInMilliseconds = timestamp1 - timestamp2;
const differenceInDays = differenceInMilliseconds / (1000 * 60 * 60 * 24);

console.log(`The difference in days is: ${differenceInDays}`);

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