published: 23 Apr 2022
2 min read
How to add months to a date in JavaScript
To add months to date in JavaScript:
- Use the
getMonth()method to get a zero-based value for the months of the given date. - Use the
setMonth()method by passing the result returned bygetMonth()plus the number of months you want to add. - The
setMonth()method sets the value on the given date.
Here is an example that adds 2 months to the current date in JavaScript:
const date = new Date()
date.setMonth(date.getMonth() + 2)
console.log(date)
// Thu Nov 10 2022 23:02:54 GMT+0500 (Pakistan Standard Time)
The getMonth() method returns a number between 0 (January) and 11 (December), presenting the number of months of the given date.
The setMonth() method takes a zero-based integer representing the month of the year and sets the value on the date.
The above methods also take care of the situation where adding a specific number of months to date results in the next day, month, or year:
const date = new Date('2022-09-10T23:33:45.900Z')
date.setMonth(date.getMonth() + 6)
console.log(date.toUTCString())
// Fri, 10 Mar 2023 23:33:45 GMT
If you frequently need to add months to date, create a reusable function that takes the number of months as a parameter and adds them to the current date, as shown below:
Date.prototype.addMonths = function (months) {
const date = new Date(this.valueOf())
date.setMonth(date.getMonth() + months)
return date
}
const date = new Date('2022-09-10T16:23:45.900Z')
// Add 3 months
const result = date.addMonths(3)
console.log(result.toUTCString())
// Sat, 10 Dec 2022 16:23:45 GMT
In the above example, we added a function called addMonths() to the Date object prototype. This function will be available to all instances of Date for adding months to date.
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How to add months to a date in JavaScript
To add months to date in JavaScript:
- Use the
getMonth()method to get a zero-based value for the months of the given date. - Use the
setMonth()method by passing the result returned bygetMonth()plus the number of months you want to add. - The
setMonth()method sets the value on the given date.
Here is an example that adds 2 months to the current date in JavaScript:
const date = new Date()
date.setMonth(date.getMonth() + 2)
console.log(date)
// Thu Nov 10 2022 23:02:54 GMT+0500 (Pakistan Standard Time)
The getMonth() method returns a number between 0 (January) and 11 (December), presenting the number of months of the given date.
The setMonth() method takes a zero-based integer representing the month of the year and sets the value on the date.
The above methods also take care of the situation where adding a specific number of months to date results in the next day, month, or year:
const date = new Date('2022-09-10T23:33:45.900Z')
date.setMonth(date.getMonth() + 6)
console.log(date.toUTCString())
// Fri, 10 Mar 2023 23:33:45 GMT
If you frequently need to add months to date, create a reusable function that takes the number of months as a parameter and adds them to the current date, as shown below:
Date.prototype.addMonths = function (months) {
const date = new Date(this.valueOf())
date.setMonth(date.getMonth() + months)
return date
}
const date = new Date('2022-09-10T16:23:45.900Z')
// Add 3 months
const result = date.addMonths(3)
console.log(result.toUTCString())
// Sat, 10 Dec 2022 16:23:45 GMT
In the above example, we added a function called addMonths() to the Date object prototype. This function will be available to all instances of Date for adding months to date.
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