Argo observes a real world time progression. The current year is 2416; i.e., the current OOC year plus 399.
How do I use this thing?
By default, the timeline will show all events that have been recorded. The control box at the top allows you to filter based on the category. The sto category means the event has to do with Argo's integration of STO story canon.
Expand All will allow you to see every event's description (which you can also activate for a single event when you click on the event itself).
The arc menu will let you select particular items of interest, like argo will show you all the major events that affected the fleet as a whole, while ds13 shows you all of the events that affected just the station.
How can I add my events or my characters?
Argo members can use this form to submit events/information for admins to process into the timeline itself. Please check out the Argo Timeline thread for more information.