document.lastModified property to know the date & time in JavaScript

WE can collect the last modified or created date of the current file by using document object lastModified property.
Here is the syntax

document.write(document.lastModified);

The above command is case sensitive

The output of current page is here Here is the complete code for you to try.

<html>
<head>
<title></title>
<script type="text/javascript">
document.write(document.lastModified);
</script>
</head>
<body>

</body>
</html>

Creating Date object

Date Object and formats

<script type="text/javascript">
var dt= new Date(document.lastModified) // Date object 
var str=dt.getDate() +'/'+dt.getMonth()+'/'+dt.getFullYear() // date/month/year 
document.write(str);
</script>

Output
document Object Sending output to screen

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document.lastModified of a page

Creating Date object