Green Day is an American punk rock band formed in 1986 in Berkeley, California. Comprising lead vocalist Billie Joe Armstrong, bassist Mike Dirnt, and drummer Tré Cool, the band gained fame in the 1990s with their groundbreaking album Dookie, which catapulted them into mainstream success and helped revive interest in punk rock. Known for their energetic performances and socially conscious lyrics, Green Day has continued to evolve over the years, producing hits like “Basket Case,” “American Idiot,” and “Boulevard of Broken Dreams.” The band is celebrated not only for their musical contributions but also for their outspoken views on political and social issues.