Green Day is an American rock trio formed in 1987. The band has consisted of Billie Joe Armstrong (vocals, guitar), Mike Dirnt (bass guitar, vocals), and Tré Cool (drums, percussion) for the majority of its existence. Green Day was originally part of the punk rock scene at 924 Gilman Street, Berkeley in East Bay, CA, United States . Its early releases for independent record label Lookout! Records earned them a grassroots fanbase, some of whom felt alienated when the band signed to a major label.

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