"Circadian" is a concept album and the first full length studio album by 5th Projekt. It was released on August 29, 2006 on 5th Projekt's Organik Rekords. The album explores the metaphysical relationship of humanity as it coexists with its environment and the cycles of which both partake and create. Music and lyrics were written by Tara Rice and/or Sködt D. McNalty. "Circadian" was recorded from May–November 2005 at Toronto's Chemical Sound with James Heidebrecht, produced by Tara Rice and Sködt D. McNalty, mixed by Ken Andrews (formerly of the band Failure) and mastered by Juno nominee João Carvalho.