demo.html

<html>
    <head>
        <title>Demo of jquery.countdown.js</title>
    </head>
    <body>
        <p data-countdown="32500886400000">
            There's only <i data-dd="1"></i> days and <i data-hh="1"></i> hours and <i data-mm="1"></i> minutes and <i data-ss="1"></i> seconds before 21 century end.
        </p>

        <script src="https://code.jquery.com/jquery-2.x-git.min.js"></script>
        <script src="jquery.countdown.js"></script>
    
    </body>
</html>