Since 1991, some members of punk band Green Day have branched out past their "main band" and have started other projects with other musicians and have released full-length albums and several EPs.
 Notable related projects of Green Day include Billie Joe Armstrong's Pinhead Gunpowder (which also featured Green Day's other guitarist Jason White), The Frustrators in which Mike Dirnt plays bass, and The Network which many speculate has all three members of Green Day, although under stagenames.
39/Smooth is the debut studio album by American punk rock band Green Day, released on April 13, 1990, by Lookout Records on vinyl (black and green) and cassette.
 It is the band's only studio album to feature original drummer John Kiffmeyer.
 Jesse Michaels of Operation Ivy contributed the artwork on the album.
 The inner sleeve shows handwritten lyrics by Billie Joe Armstrong and letters by drummer John Kiffmeyer and Lookout owner Larry Livermore to I.R.S. Records, rejecting an offer to sign to the label and declaring its loyalty to Lookout!
 Records (however, the band would later leave Lookout!
 and move to a major label, Reprise Records).
 Although it is currently out of print, "39/Smooth" was later rereleased, along with the group's two previous extended plays "Slappy", "1,000 Hours" and the song "I Want to Be Alone" (from "The Big One", a compilation album released by Flipside Records in 1990) on the compilation album "1,039/Smoothed Out Slappy Hours" in 1991.
21st Century Breakdown is the eighth studio album by American punk rock band Green Day.
 It is the band's second rock opera, following "American Idiot" (2004), and their first album to be produced by Butch Vig.
 Green Day commenced work on the record in January 2006 and forty-five songs were written by vocalist/guitarist Billie Joe Armstrong by October 2007, but the band members did not enter studio work until January 2008.
The American punk rock band Green Day has released 12 studio albums, two live albums, four compilation albums, one soundtrack album, four video albums, 10 extended plays, four box sets, 43 singles, ten promotional singles, and 39 music videos.
 The band has sold over 85 million records worldwide, including more than 30 million in the United States alone.
 Green Day released their first two studio albums, "1,039/Smoothed Out Slappy Hours" (1991) (consisting of the original "39/Smooth" as well as their first two EP's "1,000 Hours" and "Slappy") and "Kerplunk" (1991), through the independent label Lookout!
 Records before signing to major label Reprise Records. "
Dookie", the band's first album on the label and third studio album overall, was released in February 1994.
 It was a breakout success, selling over 10 million copies in the United States and 20 million copies worldwide.
 "Dookie" spawned five singles, including the international hits "Longview", Basket Case" and "When I Come Around".
 The album placed Green Day at the forefront of the 1990s punk rock revival.
Jason White (born November 11, 1973) is an American musician, best known as the current touring guitarist for the American punk rock band Green Day.
 He has played as a touring member of Green Day since 1999.
 However, in 2012, he was promoted to being an official member of the band before demoting himself back to his touring guitarist role in 2016.
 He is also the guitarist/vocalist for the Californian punk band Pinhead Gunpowder, lead guitarist/lead vocalist for California, and co-founder of Adeline Records alongside Billie Joe Armstrong.
"J.A.R." is a song by the American punk rock band Green Day.
 The song was a previously unreleased track from the Dookie sessions but it was later featured on the soundtrack to the movie "Angus" in 1995.
 The acronym stands for 'Jason Andrew Relva', a childhood friend of Green Day bassist Mike Dirnt.
 Jason Relva was born on November 16, 1972 and died at the age of 19 on April 18, 1992 as the result of injuries sustained from a car accident.
 Mike Dirnt wrote the song in remembrance of him.
Green Day is an American punk rock band formed in 1986 by lead vocalist and guitarist Billie Joe Armstrong and bassist Mike Dirnt.
 For much of the group's career, the band has been a trio with drummer Tré Cool, who replaced former drummer John Kiffmeyer in 1990 prior to the recording of the band's second studio album, "Kerplunk" (1991).
 Guitarist Jason White, who has worked with the band as a touring member since 1999, was an official member from 2012 to 2016.
1,000 Hours is the debut EP by American punk rock band Green Day.
 It was released in April 1989 through Lookout Records, the label that nurtured the band's development in its early years before the group's signing with a major label in 1993.
Billie Joe Armstrong (born February 17, 1972) is an American musician, singer, songwriter and actor who is best known as the lead vocalist, primary songwriter, and guitarist of the punk rock band Green Day, which he co-founded with Mike Dirnt.
 He is also a guitarist and vocalist for the punk rock band Pinhead Gunpowder and provides lead vocals for Green Day's side projects Foxboro Hot Tubs and The Network.
Kerplunk is the second studio album by American punk rock band Green Day, released on December 17, 1991 by Lookout!
 Records.
 "Kerplunk" was Green Day's last release on the Lookout Records label, and was also the first album to feature Tré Cool on drums.
 The album sold 10,000 copies its first day and became Lookout!
's biggest selling release.
 After debuting it to their fans in the Berkeley, California area and receiving much approval from the critical 924 Gilman Street crowd, the band packed up in a cramped, converted Book Mobile and headed east.
 Green Day developed a fan base on the east coast, behind the determined grass root efforts of lead singer, Billie Joe Armstrong.
 The opportunity paid off as album sales reached over 50,000 copies.
 Along with the successful live shows, major labels took notice of "Kerplunk"'s phenomenal popularity, as a result, many approached the band.
 Green Day realized that they had outgrown their record distribution capacity with Lookout!
 and eventually signed with Reprise Records.
 With Reprise, Green Day recorded and released their next album "Dookie" (1994).
 The album officially includes only 12 tracks, but the versions released on CD and cassette also include the 4 tracks from the "Sweet Children" EP.
 One of those tracks is a cover of The Who's "My Generation".

Question: 1,000 Hours is the debut EP by American punk rock band Green Day, Green Day is an American punk rock band formed in which year, by lead vocalist and guitarist Billie Joe Armstrong and bassist Mike Dirnt?
Answer: 1986