Green Day are a rock band from Berkeley in California. Some people will call them punk, others won't. That's up to you personally :)

There are 3 members in the band. Billie Joe Armstrong (guitar and vocals), Mike Dirnt/Pritchard (bass) and Tre Cool/Frank Edwin Wright III (drums). Most songs are written by Billie Joe, and the music by Green Day. The original drummer was John Kiffmeyer, also known as Al Sobrante. He left Green Day after 39/Smooth to go to college.

Green Day started off as Sweet Children, in 1988. They changed their name to Green Day in 1990, and were signed to Lookout! Records. In 1993 they signed to Reprise Records, a major label, whom they are still signed to now.

Green Day have 5 albums, 1,039 Smoothed Out Slappy Hours (Originally it was 1000 hours, 39/Smooth, Slappy EP and a song from a Flipside compilation, now all put together), Kerplunk!, Dookie, Insomniac and Nimrod. The first two are released on Lookout! and the other ones on Reprise. The Kerplunk! CD and tape have an extra 4 songs on a Sweet Children release, which is no longer issued.

The birthdays of Green Day: Billie Joe is February 17th 1972, Mike is May 4th, 1972, and Tre Cool is December 9th 1972.

Billie Joe is married to Adrienne, and has a son, Joseph Marcicano and is expecting another baby in September. Mike is divorced (ex-wife Anastasia) with a daughter, Estelle Desiree. Tre is also divorced (ex-wife Lisea) with a daughter, Ramona.