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This tutorial shows you how to add one or more months to a date in JavaScript.
Node.js Series Overview
- Increase the Memory Limit for Your Process
- Why You Should Add “node” in Your Travis Config
- Create a PDF from HTML with Puppeteer and Handlebars
- Create Your Own Custom Error
- Extend Multiple Classes (Multi Inheritance)
- Get a File’s Created Date
- Get a File’s Last Modified/Updated Date
- Write a JSON Object to a File
- How to Create an Empty File
- Generate a Random Number in Range With JavaScript/Node.js
- How to Merge Objects
- Retrieve a Request’s IP Address in Node.js
- Detect the Node.js Version in a Running Process or App
- Install Dependencies for a Specific Package
- String Replace All Appearances
- Remove All Whitespace From a String in JavaScript
- Generate a Random String in Node.js or JavaScript
- Remove Extra Spaces From a String in JavaScript or Node.js
- Remove Numbers From a String in JavaScript or Node.js
- Get the Part Before a Character in a String in JavaScript or Node.js
- Get the Part After a Character in a String in JavaScript or Node.js
- How to Check if a Value is a String in JavaScript or Node.js
- Check If a String Includes All Strings in JavaScript/Node.js/TypeScript
- Get Number of Seconds Since Epoch in JavaScript
- Get Tomorrow’s Date in JavaScript
- Increase a Date in JavaScript by One Week
- Add Seconds to a Date in Node.js and JavaScript
- Add Month(s) to a Date in JavaScript or Node.js
- How to Run an Asynchronous Function in Array.map()
- How to Reset and Empty an Array
- for…of vs. for…in Loops
- Clone/Copy an Array in JavaScript and Node.js
- Get an Array With Unique Values (Delete Duplicates)
- Sort an Array of Integers in JavaScript and Node.js
- Sort a Boolean Array in JavaScript, TypeScript, or Node.js
- Check If an Array Contains a Given Value in JavaScript or Node.js
- Add an Item to the Beginning of an Array in JavaScript or Node.js (Coming soon)
- Append an Item at the End of an Array in JavaScript or Node.js (Coming soon)
- Callback and Promise Support in your Node.js Modules
- Run Async Functions/Promises in Sequence
- Run Async Functions/Promises in Parallel
- Run Async Functions in Batches
- How to Fix “Promise resolver undefined is not a function” in Node.js or JavaScript
- Detect if Value Is a Promise in Node.js and JavaScript
- How to Check if an Object is Empty in JavaScript or Node.js
- How to CamelCase Keys of an Object in JavaScript or Node.js (Coming soon)
Add Month(s) to a Date in JavaScript
JavaScript comes with a Date class providing useful date handling. You can customize a date instance by adding the units you need. A date instance comes with .setX methods to customize it.
In this case, you want to add a given number of months to a date. Add the given amount of months to a date instance using date.setMonth(currentMonth + delay).
/**
* Returns the date with added `months` of delay.
*
* @param {Number} months - the delay in months
*
* @returns {Date}
*/
function dateWithMonthsDelay (months) {
const date = new Date()
date.setMonth(date.getMonth() + months)
return date
}
Notice that date.setMonth directly changes the date instance.
A nice benefit of using this built-in method is that JavaScript takes care of switching the unit. For example, JavaScript also adjusts the years of your date instance if adding the months would exceed December. Sweet!
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