Our web calendar is a central way we can keep track of what's going on, so that many of us have access to the latest updates at our convenience. It's based upon a calendar created by Ike McGowan called phpEventCalendar, but it has been modified heavily from his initial version.
If you would like to try our calendar software, the software is free. You can download it from here: Archives.
If you don't mind dealing with bugs, you could try the latest bleeding-edge development version of the calendar, available from its gitweb home. This is a Git repository, which lets you browse changesets and other things.