Musically, "First of the Year (Equinox)" is prominently a Dubstep song that uses elements of electro house. The song has since become a moderate commercial success, peaking within the charts of the United States, Australia, Canada, Norway and Sweden. A music video directed by Tony Truand premiered on August 10, 2011, and was nominated at the 54th Grammy Awards for Best Short Form Music Video.
- "Call 911 now!" is a sample taken from an infamous YouTube video of a woman yelling at a group of photographers in an illegal area to loiter. The full sample is: "I'm calling the police now! Call 911 now!" See here; https://www.youtube.com/watch?v=LgGgmOy2av4
- The chopped up vocals are sampled from the chorus to Equinox, one of Sonny Moore's pre-Skrillex songs.