Green Day will release 18 demos, including a previously unreleased track, on Record Store Day.
Record Store Day is April 19.
The releases will come from the sessions for the band's 2012 trilogy of albums, Uno, Dos, and Tre.
Green Day is not new to Record Store Day releases. They reissued their breakthrough album, Dookie, on Record Store Day in 2009 and they released a Husker Du cover in 2011.