Green Day is an American punk rock band formed in 1986. The group consists of Billie Joe Armstrong, Mike Dirnt, and Tré Cool. Green Day is known for their energetic performances, impactful lyrics, and groundbreaking albums. Albums like “Dookie,” “American Idiot,” and “21st Century Breakdown” have garnered them a wide fan base and a significant place in the music industry. Green Day is recognized for its influence and success in punk rock music, and they continue to actively make music.