How to set up the countdown clock? on the landing page

Hi Tobias,
This is instruction to setup a landing-page:
Step 1
Go to Dashboard => Add new page -> On “Page attributes”, select “Landing Page”

This is the HTML markup:

<h1>Under Construction.</h1>
We create awesome designs and modern resoponsive templates for your pleasure.
All this and more will be available to you in:
<div id="countdown" data-until="2012-12-25 10:00:00"></div>
<h3>Stay Tuned.</h3>
<p class="sub">Subscribe to get notified when we launch.</p>
[contact-form-7 id="253" title="Landing form"]

Step 2
If you want to set the landing page as home page, go to Setting -> reading :

Hope this help.
Regards,
Terry Strong

Thank you Terry. Wonderfully helpful. Please add this to the general documentation of the theme.