Roots of Operation Ivy

1,000 Hours is the debut extended play (EP) by American rock band Green Day, released in April 1989 through Lookout Records. Through a shared interest in music, school friends Billie Joe Armstrong and Mike Dirnt formed the band Sweet Children. With the addition of drummer John Kiffmeyer, they played at the local punk club 924 Gilman Street in Berkeley, California, where they started attracting a following. After playing a show with the Lookouts, one of their members, Larry Livermore, signed Sweet Children to his label Lookout Records. They co-produced their debut EP, 1,000 Hours, with Andy Ernst at the Art of Ears Studio in San Francisco, California, in early 1989.