Date setMonth() Method - Javascript Date

Javascript examples for Date:setMonth

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Description

The setMonth() method sets the month of a date object.

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

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

Syntax 

date.setMonth(month,day)

Parameter Values

Parameter Description
month Required. An integer representing the month
day Optional. An integer representing the day of month

month expected values are 0-11, but other values are allowed:

  • -1 sets the last month of the previous year
  • 12 sets the first month of the next year 13 sets the second month of the next year

day expected values are 1-31, but other values are allowed:

  • 0 sets the last day of the previous month
  • -1 sets the day before the last day of the previous month
  • If the month has 31 days: 32 sets the first day of the next month
  • If the month has 30 days: 32 sets the second day of the next month

Return Value:

A Number, representing the number of milliseconds between the date object and midnight January 1 1970

display the date after setting the date to be the last day of last month.

Demo Code

ResultView the demo in separate window 

<!DOCTYPE html>
<html>
<body>

<button onclick="myFunction()">Test</button>

<p id="demo"></p>

<script>
function myFunction() {//  w  w w.  ja va 2s.  c  o  m
    var d = new Date();
    d.setMonth(d.getMonth(), 0);
    document.getElementById("demo").innerHTML = d;
}
</script>

</body>
</html>

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