Example: In the top left-hand corner of this site.
The frame changes depending on the day of the month.

To get this effect:

Place the following in the head of the redirect page
<SCRIPT LANGUAGE="JavaScript">

<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->

<!-- Begin
var today = new Date();
var day = today.getDate();
window.location = day + ".html";
// End -->
</SCRIPT>
Then 31 pages will need to be created, named 1.html through 31.html