HTML | DOM Input Datetime value Property

Last Updated : 29 Aug, 2022

The Input Datetime value property is used for setting or returning the value of the value attribute of a datetime field.
The Input Datetime value attribute can be used for specifying a date and time for the datetime field.

Syntax:

For returning the value property:

datetimeObject.value

For setting the value property:

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

Property Value:

YYYY-MM-DDThh:mm:ssTZD: It is used to specify the date and/or time.
- 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 represents the value of date and time for Datetime field.

The below program illustrates the Datetime value property :

Example 1: Returning the value of the date and time for the datetime field.

HTML

<!DOCTYPE html>
<html>
 
<head>
    <title>Input Datetime value 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 value Property</h2>
    <br> Date Of Birth:
    <input type="datetime" id="Test_Datetime" value="2019-11-11">
 
<p>To return a date and time for the datetime field,
    double-click the "Set Date And Time" button.</p>
 
    <button ondblclick="My_Datetime()">Return Date And Time</button>
 
    <p id="test"></p>
 
    <script>
        function My_Datetime() {
            var g = document.getElementById("Test_Datetime").value;
            document.getElementById("test").innerHTML = g;
                                         
        }
    </script>
 
</body>
 
</html>

Before:

After:

Example 2: Setting a date and time for a datetime field.

HTML

<!DOCTYPE html>
<html>
 
<head>
    <title>Input Datetime value 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 value Property</h2>
    <br> Date Of Birth:
    <input type="datetime" id="Test_Datetime">
 
<p>To set a date and time for the datetime field,
      double-click the "Set Date And Time" button.</p>
 
    <button ondblclick="My_Datetime()">Set Date And Time</button>
 
    <p id="test"></p>
 
    <script>
        function My_Datetime() {
            document.getElementById("Test_Datetime").value = 
                                         "2019-02-04T12:32Z";
        }
    </script>
 
</body>
 
</html>