"Dirty Day is a father and son song. 'It's a dirty day', was an expression my dad would use and there is a lot of him in there but it was also influenced by Charles Bukowski, the great American writer and drinker. The song is about a character who has walked out on his family and, years later, meets the son he's abandoned. It's not about my father but I used some of my dad's attitude in it."
Twenty songs were recorded for Zooropa during the sessions, but ultimately 10 were chosen for the final track listing. One piece that was left off the record was "In Cold Blood", which featured somber lyrics written by Bono in response to the Bosnian War and was previewed prior to the album's release.