Hot on the heels of the ground breaking (ok, not really) photo display system is the stupendous, incredible Calendar! It'll let you keep track of your day in some rudimentary fashion. You can post events that are either private (only you can see them) or public so that the whole spine.cx community can share them.
If anybody actually decides to use it, please let me know if you run into any bugs or other unexpected annoyances. You can get to the Calendar by clicking on the item in the main menu that says "Calendar" ;)