JavaScript setDate Function

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

 Date.setDate(Day_Number)

JavaScript setDate Function Example

Here, we used the setDate function to set the current day to 25th.

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

  dt.setDate(25);
  document.write("After setDate() : " + dt);
</script>
</body>
</html>
JavaScript setDate Function Example

Date and Time: Mon Nov 05 2018 11:45:07 GMT+0530 (Indian Standard Time)
After setDate(): Sun Nov 25 2018 11:45:07 GMT+0530 (Indian Standard Time)

JavaScript set Date Example 2

In this setDate function example, we set the day number of a custom date to 31

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

  dt.setDate(31);
  document.write("After setDate() : " + dt);
</script>
</body>
</html>
JavaScript setDate Function 2

JavaScript set Date Example 3

In this JavaScript set Date example, we set the day number of custom date (without Day or Month) to 31.

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

  dt.setDate(31);
  document.write("After setDate() : " + dt);
</script>
</body>
</html>
JavaScript setDate Function Example

Date and Time: Fri Jan 01 2016 10:11:22 GMT+0530 (Indian Standard Time)
After setDate(): Sun Jan 31 2016 10:11:22 GMT+0530 (Indian Standard Time)