@SteRDLK Please tell me you're joking. The song is about sectarianism and murder! Not that! Look up 'Bloody Sunday' on Wikipedia. They are two of the worst events to have ever occurred in irish history.
It really encapsulates the frustration of a Sunday, doesn't it? You wake up in the morning, you've got to read all the Sunday papers, the kids are running round, you've got to mow the lawn, wash the car, and you think "Sunday, bloody Sunday!".
Both the U2 original and the Paramore version are good but for different reasons. The Paramore version is maybe easier to listen to because of Hayley's near perfect vocals, whereas the U2 original has all the emotion and passion that Paramore lack because U2 are actually singing about their feelings about the events and the anger that they feel.