I recently added a new CLI command "marko show birthday" to svn trunk in revision 58742 to show "birthday information" for Mark Spencers upcoming 30th birthday.

To enable, run `make menuselect` and select the option MARKO_BDAY under Compiler Flags.

For details, see http://lists.digium.com/pipermail/svn-commits/2007-March/022271.html