Javascript Reference - JavaScript setMonth() Method








setMonth(month)
Sets the month of the date, which is any number 0 or greater. Numbers greater than 11 add years.

January is 0, February is 1, and so on.

This method can also be used to set the day of the month.

Browser Support

setMonth() Yes Yes Yes Yes Yes

Syntax

dateObject.setMonth(month, day);




Parameter Values

Parameter Description
month Required. An integer representing the month
Expected values are 0-11, but other values are allowed:
-1 will result in the last month of the previous year
12 will result in the first month of the next year
day Optional. An integer representing the day of month

Expected values are 1-31, but other values are allowed:
0 will be the last day of the previous month
-1 will be the day before the last day of the previous month

If the month has 31 days, 32 will be the first day of the next month

If the month has 30 days, 32 will be the second day of the next month




Return Value

return a number representing the number of milliseconds between the date object and midnight January 1 1970.

Example


      var myDate = new Date();
      
      myDate.setMonth(2);
      console.log(myDate.toString());

The code above generates the following result.

Example 2

The following code sets date value to May 21st.


<!DOCTYPE html>
<html>
<body>
<button onclick="myFunction()">test</button>
<p id="demo"></p>
<script>
function myFunction() {<!--   ww  w .ja v a2  s. co m-->
    var d = new Date();
    d.setMonth(4, 21);
    document.getElementById("demo").innerHTML = d;
}
</script>
</body>
</html>

The code above is rendered as follows:

Example 3

The following code set the date to the last day of last month.


<!DOCTYPE html>
<html>
<body>
<button onclick="myFunction()">test</button>
<p id="demo"></p>
<script>
function myFunction() {<!--  ww  w .  j a v  a  2  s . c om-->
    var d = new Date();
    d.setMonth(d.getMonth(), 0);
    document.getElementById("demo").innerHTML = d;
}
</script>
</body>
</html>

The code above is rendered as follows: