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.
Tenis or Horse racing
Catholicism.
Christmas
The main lough is Lough Neagh.
Belfast
Ireland's main trading partner is Britain, if that is what you mean.
EuroGames - LGBT sporting event - was created in 1992.
Agriculture probably
It is the biggest sporting event.
yum! brands has sponsored every sporting event since 1945
The longest runing sporting event in the USA is the Kentucky Derby
Dick Fosbury created the Fosbury flop. The sporting event is high jump.