Every year there is an Anniversary-celebration at Outpost 10F, usually the weekend closest to August 22nd, which is the day of the actual founding. Except for 2009 when Anniversary took place mid September...
During the Anniversary weekend there are activities ranging from random shooting at poor bullseyes (to avoid saying IS-Agents) to equally random guessing during usually 2 Trivias (one of which is an OTF-Trivia) to an Awards- and Promotion ceremony.
Some speeches are being held too, the occasional Food Fight to interrupt, and then there are the Voting Booth results.
And in between always shooting at those Bullseyes...
Well, if you never participated in an Anniversary you probably won't understand much of what I just said. Don't worry though, click on the year in the right, if you are lucky you'll find some chatsaves from Anniversary-events next to the schedule.
If you have participated in at least one Anniversary before, you are welcome to do the same, to step back into your past and see some old friends again who haven't been in for a while.