Add Years to a Date Using JavaScript

To add years to a date, we can use the JavaScript getFullYear() method. The getFullYear() method gets the current year of a date object. We can then add more years to it and create a new Date using the Date() method.

var date1 = new Date();
var currYear = date1.getFullYear();
var currMonth = date1.getMonth();
var currDay = date1.getDate();
var currHours = date1.getHours();
var currMinutes = date1.getMinutes();
var currSeconds = date1.getSeconds();
var newDate = new Date(currYear + 5, currMonth, currDay, currHours, currMinutes, currSeconds);
//This will create a new date that will be 5 years ahead of the current date

We can also add negative milliseconds to subtract years from a date. Below are some examples of adding years to a date object with the help of the getTime() method.

var date1 = new Date();
var currYear = date1.getFullYear();
var currMonth = date1.getMonth();
var currDay = date1.getDate();
var currHours = date1.getHours();
var currMinutes = date1.getMinutes();
var currSeconds = date1.getSeconds();
var result1 = date1;
var result2 = new Date(currYear + 5, currMonth, currDay, currHours, currMinutes, currSeconds);
var result3 = new Date(currYear + 100, currMonth, currDay, currHours, currMinutes, currSeconds);
var result4 = new Date(currYear - 5, currMonth, currDay, currHours, currMinutes, currSeconds);
var result5 = new Date(currYear - 100, currMonth, currDay, currHours, currMinutes, currSeconds);

Which would result in the following:

Add Years to a Date Using JavaScript with a Click

In this example, we will let the user add years to the current date using an input field. We will use the getFullYear() method like we did above.

Here is our HTML setup:

<p>How many years do you want to add to the current date and time?</p>
<input id="userVal" type="text" value="">
<input id="submitNum" type="submit" onclick="addYears()" value="Submit">
<div id="results"></div>

Below is the JavaScript code which will take the user input using the onclick event and run the function below. The function will add the years to the current date like we did above. We will then update the #results div using the textContent property.

function addYears() {
  var date1 = new Date();
  var currYear = date1.getFullYear();
  var currMonth = date1.getMonth();
  var currDay = date1.getDate();
  var currHours = date1.getHours();
  var currMinutes = date1.getMinutes();
  var currSeconds = date1.getSeconds();
  var userYears = document.getElementById("userVal").value;
  var newDate = new Date(currYear + Number(userYears), currMonth, currDay, currHours, currMinutes, currSeconds);
  document.getElementById("results").textContent = newDate;
}

The final code and output for this example is below:

Code Output:

Full Code:

<p>How many years do you want to add to the current date and time?</p>
<input id="userVal" type="text" value="">
<input id="submitNum" type="submit" onclick="addYears()" value="Submit">
<div id="results"></div>

<script>

function addYears() {
  var date1 = new Date();
  var currYear = date1.getFullYear();
  var currMonth = date1.getMonth();
  var currDay = date1.getDate();
  var currHours = date1.getHours();
  var currMinutes = date1.getMinutes();
  var currSeconds = date1.getSeconds();
  var userYears = document.getElementById("userVal").value;
  var newDate = new Date(currYear + Number(userYears), currMonth, currDay, currHours, currMinutes, currSeconds);
  document.getElementById("results").textContent = newDate;
}

</script>

Hopefully this article has been useful in helping you understand how to Add Years to a Date Using JavaScript.