HTML | DOM Input Datetime max Property

Last Updated : 24 Jan, 2022

The Input Datetime max property is used for setting or returning the value of the max attribute of a datetime field.
The Input Datetime max attribute returns a string that represents the maximum date and time allowed.
Syntax:

For returning the max property:

datetimeObject.max

For setting the max property:

datetimeObject.max = YYYY-MM-DDThh:mm:ssTZD

Property Value:

YYYY-MM-DDThh:mm:ssTZD : It is used to specify the maximum date and time allowed.
- YYYY : It specifies the year.
- MM : It specifies the month.
- DD : It specifies the day of the month.
- T : It specifies the separator if time is also entered.
- hh : It specifies the hour.
- mm : It specifies the minutes.
- ss : It specifies the seconds.
- TZD : It specifies the Time Zone Designator.

Return Values: It returns a string value which defines the maximum date and time for the DateTime Field.

Below program illustrates the Datetime Max property :
Example 1: Getting the maximum date and time allowed for a datetime field.

html

<!DOCTYPE html>
<html>

<head>
    <title>Input Datetime max Property in HTML</title>
    <style>
        h1 {
            color: green;
        }
        
        h2 {
            font-family: Impact;
        }
        
        body {
            text-align: center;
        }
    </style>
</head>

<body>

    <h1>GeeksforGeeks</h1>
    <h2>Input Datetime max Property</h2>
    <br>

    


<p>The range of date and time accepted is between
      2019-02-18 12:00 AM and 2019-02-20 12:00 AM:</p>



  
        <input type="datetime" id="Test_Datetime" 
        min="2019-02-18T12:00Z" max="2019-02-20T12:00Z">

        


<p>To return the max range of the datetime field,
               double click the "Return Max" button.</p>




        <button ondblclick="My_Datetime()">Return Max</button>

        <p id="test"></p>




        <script>
            function My_Datetime() {
                var d = document.getElementById("Test_Datetime").max;
                document.getElementById("test").innerHTML = d;
            }
        </script>

</body>

</html>

Output:
Before:

After clicking the button

Example 2: Setting the datetime max property

HTML

<!DOCTYPE html>
<html>

<head>
    <title>Input Datetime max Property in HTML</title>
    <style>
        h1 {
            color: green;
        }
        
        h2 {
            font-family: Impact;
        }
        
        body {
            text-align: center;
        }
    </style>
</head>

<body>

    <h1>GeeksforGeeks</h1>
    <h2>Input Datetime max Property</h2>
    <br>
  
        <input type="datetime" id="Test_Datetime" 
        min="2019-02-18T12:00Z" max="2019-02-20T12:00Z">

        


<p>To set the max range of the datetime field,
               double click the "Set Max" button.</p>




        <button ondblclick="My_Datetime()">Set Max</button>

        <p id="test"></p>




        <script>
            function My_Datetime() {
                var d = document.getElementById("Test_Datetime").max =
                    "2020-02-02";
                document.getElementById("test").innerHTML = d;
            }
        </script>

</body>

</html>