This is an easy answer for me.
FIFA World Cup.
It only comes every 4 years and lasts for a month.
Favourite stretch would be the group the stage.
The whole country goes nuts when England is playing and theres no better excuse than to go to the pub and watch the match.
FAO - Dana White. You think MMA is bigger than Soccer in Brazil. Take note this summer as Brazil is hosting the World Cup Finals, prepare to be humbled.