Songfacts®:

• The title track of The Prodigy's sixth album, the song was inspired by Ella Fitzgerald's version of the Cole Porter tune "All Through the Night," in particular its lyrics "the day is my enemy, the night my friend."
• Like The Prodigy's previous albums, The Day Is My Enemy is imbued with a sense of aggression. "I can't tell you why this record came out so angry, I think its just inbuilt in me," explained keyboardist/producer Liam Howlett. "It's more about what I like music to do."
  
  "I've always seen music I like as a form of attack," he added. "That's what I use music for, it's an attack. I didn't plan this album to sound violent, it's just the sound that came out of the studio, a kind of build up over the last four years."
  
  "'Anger is an energy', that's a lyric which always resonated with me," Howlett concluded. "The tension is buried deep in the music right from the first drop. It's all about the sound having that sense of danger. That's what The Prodigy sound is about."
• The song features vocals by Martina Topley-Bird, who is known for her work with Tricky and Massive Attack. Her singing was actually done for a completely different track that Howlett had done. He loved her contribution, but just didn't like the song. Howlett told Spin: "I tucked it away for the right moment, and so I pulled it back out without the track. It was really perfect for the concept of this album."