JavaScript Program to Convert Date to Number

JavaScript Date objects represent a single moment in time in a platform-independent format. Date objects contain a Number that represents milliseconds since 1 January 1970 UTC.

Prerequisites

• Basic understanding of JavaScript
• JavaScript's Built-in Date.getTime() Method

Convert Date to Number in JavaScript

We will be using the Date.getTime() method to convert a date to a number.

In the example below, the new Date() constructor is used to create a date object. It returns the current date and time. The getTime() method returns the number of milliseconds since January 1, 1970, 00:00:00 UTC.

// function to convert date to number
function convertDateToNumber(currentDate) {
  // date.getTime() returns the number of milliseconds since January 1, 1970, 00:00:00 UTC
  var dateNumber = date.getTime();
  return dateNumber;
}

// store the current date in a variable
const currentDate = new Date();
console.log(currentDate); // Fri Jul 22 2022 15:09:41 GMT-0600 (Mountain Daylight Time)

// pass the current date as an argument to the function convertDateToNumber
console.log(convertDateToNumber(date)); // 1658524181766

Summary

In this tutorial, we have learnt how to convert a date to a number using the JavaScript's built-in Date.getTime() method. We also looked into the Date() constructor to create a date object.

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