Advent Calendar

Latest calendar

Each year a series of 25 articles is published rather humorously as the Catalyst Advent Calendar.

Previous calendars

Please note that some of the techniques in older articles may now be obsolete.


Catalyst Advent Calendar 2007


Catalyst Advent Calendar 2006


Catalyst Advent Calendar 2005

How To Contribute An Article

If you'd like to contribute an article, either get on to IRC channel #catalyst-dev on or post a message to the catalyst-dev list in November suggesting a topic and asking for feedback. Assuming the topic is accepted, ask for a Subversion login and password.

The site is run using the \CatalystAdvent application. The code may be checked out of the Subversion repository at (Instructions on using Subversion are at

Draft articles pending approval are held in the root/<year>/pen directory. Approved articles are held below root/<year>. E.g. root/2007/1.pod holds the day 1 article for 2007. Draft articles are moved up to root/<year> once checked and approved.

Articles are written in POD format. If you're not sure about POD formatting, look at previous articles to see how to insert titles, quote code etc.


Say you have been allocated day 10 in 2008.