39/Smooth was initially released as the debut album by the band Green Day in 1990 on Lookout! Records on vinyl (including limited quantities of clear green vinyl) and cassette. It would be combined with the Slappy and 1,000 Hours EPs, plus a track from a compilation, and released the following year as 1,039/Smoothed Out Slappy Hours on CD and cassette. removed their catalog from Lookout! Records.
All songs by Green Day, except where noted.