There are 302 events in 26 sports for the 2012 London Olympics
A sport with 10 events
the summer olyimpics occur every 2 years
Swimming, Track and Field, and other sport they show at midnight.
The equestrian events at the Olympics 2012 are: Eventing, Show jumping and dressage. In all the events, teams compete together then the best riders from that go through to the individuals.
The next winter olyimpics is in 2016