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JavaScript setMonth Function

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JavaScript setMonth function is one of the Date Function, which is used to set the Month number and Day Number of a given date as per local time. The syntax of the JavaScript setMonth function is:

 Date.setMonth(Month_Number, Day_Number)

Here, Day Number is an optional argument. Remember, Month_Number should be between 0 and 11 where 0 is January and 11 is December

JavaScript setMonth Function Example

The following example helps you understand the JavaScript set Month Function. Here, we are using setMonth to set the current Month to April.

<!DOCTYPE html>
<html>
<head>
    <title> JavaScript Set Month Functions </title>
</head>
<body>
    <h1> JavaScript setMonth Function Example </h1>
<script>
  var dt = Date();  
  document.write("Date and Time : " + dt + "<br/>");

  dt.setMonth(3);
  document.write("After setMonth() : " + dt);
</script>
</body>
</html>

OUTPUT

JavaScript setMonth Function 1

If you want to set the date to April 1 then use dt.setMonth(3, 1)

JavaScript set Month Function Example 2

In this example for JavaScript set Month, we set the month number of a custom date to 11 (December)

<!DOCTYPE html>
<html>
<head>
    <title> JavaScript Set Month Functions </title>
</head>
<body>
    <h1> JavaScript setMonth Function Example </h1>
<script>
  var dt = Date("April 1, 2016 10:11:22");
  document.write("Date and Time : " + dt + "<br/>");

  dt.setMonth(11);
  document.write("After setMonth() : " + dt);
</script>
</body>
</html>

OUTPUT

JavaScript setMonth Function 2

JavaScript set Month Function Example 3

In this setMonth example, we set the month number of custom date (without Month or day) to June.

This will take the default month January 01 and then sets the value to June.

<!DOCTYPE html>
<html>
<head>
    <title> JavaScript Set Month Functions </title>
</head>
<body>
    <h1> JavaScript setMonth Function Example </h1>
<script>
  var dt = Date("2016 10:11:22");
  document.write("Date and Time : " + dt + "<br/>");

  dt.setMonth(5);
  document.write("After setMonth() : " + dt);
</script>
</body>
</html>

OUTPUT

JavaScript setMonth Function 3