In xbox live can anybody play from the calender of events? if so how do you know which game to join?

Question

In xbox live can anybody play from the calender of events? if so how do you know which game to join?

Answer 1

Well, it gives you a game and a date.

You don't neccessarily need to join anything.

Xbox just does it to get the community together, so your free to join the games.

Answer 2

just pick one?

what do you mean "how do you know which one to join?"