Calendar events, or just events, are user posted calendar entries.

Unlike holidays, these are usually tied to a topic for the purpose of discussion, but as of SMF 1.1 they can be independent of any topic. They can often be helpful in coordinating real-world events in many situations, or reminding people of upcoming happenings.

Events can only be posted, seen, and modified when the calendar is enabled|Core Features#Calendar|enabled. The number of events you can have posted is limited to about 65,535 by default, but this limit can be raised.