DateMonthYear describe themselves not as a band, but as "a flexible recording/performing unit". It had existed as three entities; 1) as "DateMonthYear-lite", comprising solo or unplugged work, 2) as a more conventional ‘live’ band, and 3) as a group combining experimental and electronic elements to their live sound. The band-name DateMonthYear came while core-member Trevor Faville worked at a London hospital where, for fun, he decided with colleagues to find band names based on anything they could see around them; the phrase Date: Month: Year: was on a patient admission form.
DateMonthYear have released one EP, Sampler (2003), and three albums - 7Ghosts (2004), Thegreatdatemonthyearguitaremixchallenge remix album (2007), and Pot/Kettle/Black (2008). Five songs from the 7Ghosts album were used in a feature film, the New Zealand "erotic thriller" Luella Miller (2005). A song called Riverdragon was released in 2011, a song originally written by students of Fairfield College with Faville years earlier.
Performances have included a concert with Trust Waikato Symphony Orchestra, where Faville arranged the bands music for a full orchestra. In January 2016, DMY undertook a triple music video release, where three different film-makers were invited to make videos for a DMY song of their choice. These included a video for River, written with Jae Lurman.
- Sampler EP, 2003
- 7Ghosts album, 2004
- Thegreatdatemonthyearguitaremixchallenge remix album, 2007
- Pot/Kettle/Black album, 2008
- DateMonthYear (album), 2020
- Prelude appears on the 2009 compilation One
- Work appears on the 2009 compilation Two
- Spit Out the Sun appears on the 2016 compilation Lost on a Highwire
- Trevor Faville from DateMonthYear, with Ian Duggan, Hamilton Underground Press, 15 December 2015 
- ‘The Ind[i]efatigables’: An Interview with DateMonthYear’s Trevor Faville, with Ian Duggan, Hamilton Underground Press, 5 December 2019