It is the biggest sporting event.
Cricket.
The Kentucky Derby
the olympics
soccer the fifa world cup
The London 2012 Paralympics
the european champions league
Olympics, College, High School Athletics!
French open
The Olympics involve every country, so people from every country tune in to watch whatever sporting event they are interested in. E.g. 100m Sprint, Archery.
The biggest individual sporting event in Ireland is the All-Ireland Senior Football Championship Final. It is the biggest event for Gaelic Football, one of Ireland's two main national sports. The other is Hurling. It also has an Ireland Final, which is also a major sporting event. The All-Ireland Hurling Final usually takes place on the first Sunday in September and the All-Ireland Football Final usually takes place on the third Sunday in September.
The Olympics is know as the biggest sporting event in the world and is held every four years in a different country. The gymnaestrada is also held every four years in a different country around the world. There are around 12,000 athletes in the Olympics but there are over 20,000 gymnasts in the gymnaestrada making it the biggest sporting event in the world for participants.