Kae Verens has posted a quick post looking at combining the jQuery javascript library with a PHP backend to create a more advanced calendaring system for your site.

I was supposed to write about Datatables for chapter 6, but the website of the plugin I was going to use (http://www.datatables.net/) was down for about a week, and so I wrote about Calendars instead. [...] In chapter 6 of the book, I'll walk through how to build a simple calendar, including creation and editing of events, and including once-off and recurring events.

You can see a demo of the script, an image of the result and download the code if you want to get started directly.