1,039/Smoothed Out Slappy Hours is a compilation album comprising early recordings by American punk band Green Day, released October 1, 1991, on Lookout Records. Often erroneously referred to as the band's debut album, the compilation combines the band's actual debut, 39/Smooth (1990), and its first two EPs, 1,000 Hours (1989) and Slappy (1990), as suggested by the amalgamation of the titles of the debut album and two EPs for the resulting compilation album.