What is Green Day?
{{Infobox musical artist <!-- See Wikipedia:WikiProject Musicians --> | name = Green Day | image = Green Day 2017 Germany.png | caption = Green Day performing in January 2017; from left to right: [[Jason White (musician)|Jason White]], Jeff Matika, {{nowrap|[[Billie Joe Armstrong]]}}, [[Tré Cool]], [[Jason Freese]], and [[Mike Dirnt]] | alias = Sweet Children (1987–1989) | landscape = yes | background = group_or_band | origin = [[East Bay]], [[California]], U.S. | genre = {{flatlist| * [[Punk rock]] * [[pop punk]] * {{nowrap|[[alternative rock]]}} * [[power pop]] * [[skate punk]] * [[Heavy metal music|heavy metal]] }} | years_active = 1987–present | label = {{flatlist| * [[Reprise Records|Reprise]] * [[Warner Records|Warner]] * [[Lookout Records|Lookout!]] }} | associated_acts = {{flatlist| * [[Pinhead Gunpowder]] * [[The Network]] * [[Foxboro Hot Tubs]] * [[The Coverups]] }} | website = {{URL|greenday.com}} | current_members = * [[Billie Joe Armstrong]] * [[Mike Dirnt]] * [[Tré Cool]] | past_members = * Sean Hughes * Raj Punjabi * [[John Kiffmeyer]] * [[Jason White (musician)|Jason White]] }} '''Green Day''' is an [[United States|American]] [[Rock music|rock]] [[Trio (music)|trio]] that [[form]]ed in 1987. The members of the band are [[Billie Joe Armstrong]] ([[lead vocals|vocals]], [[guitar]]), [[Mike Dirnt]] ([[bass guitar]], [[backing vocals|vocals]]), and [[Tré Cool]] ([[drum kit|drums]], [[percussion instrument|percussion]]), [[Jason White (musician)|Jason White]] (guitar/vocals) and [[Jason Freese]] ([[Keyboard instrument|keyboard]]). Jason Freese only participates in concert tours. '''Green Day''' is often celebrated as one of the best punk rock bands currently performing. At first, Green Day was part of the [[punk rock]] [[culture]] at [[924 Gilman Street]] in [[Berkeley, California]]. Its album ''[[Dookie]]'' (1994) became a success. Soon, it [[sold]] more than [[ten]] [[million]] copies in the [