In 2012, Green Day released their most ambitious collection of music yet: A trilogy of albums - ¡Uno!, ¡Dos!, and ¡Tré! - over a period of three months. Unfortunately, the fun was cut short when frontman Billie Joe Armstrong had to go to rehab. Proper promo was out the window, though Green Day did end up touring in spring and summer 2013.
Naturally, the whole band felt like they needed to take a step back before moving on to the next Green Day project. Billie Joe was already writing songs in early 2013, but it would be a few more years before they'd be ready for fans to hear. Instead, he, Mike Dirnt, and Tré Cool turned to other projects and time with family.
Billie Joe released a covers album with Norah Jones, featured on a few songs with other artists, appeared in a few movies, wrote songs for said movies and a new original musical, and started up a guitar store. Mike spent time with his wife as she battled breast cancer, got involved with producing and writing music for an indie film, and started an organic coffee company with Billie Joe. Tré found love again and got married. On top of all that, Green Day was inducted into the Rock and Roll Hall of Fame in 2015 (the first year of eligibility), saw the release of two documentaries (one about their American Idiot musical, the other a long-awaited doc about making the album of the same name), and got started on another, still-unreleased documentary about the East Bay punk scene from which they came. In short: Green Day has been busy.
By April 2015, Billie had at least 5 demos ready for longtime producer Rob Cavallo. In January 2016, Green Day finally entered the studio to begin recording. The band has been quiet these last few months, working away on new music as anticipation builds among their eager fanbase. Word on the street is that Green Day's 12th studio album should be out sometime this fall. The first single from the album, "Bang Bang," will premiere on August 11th; more news should be announced around then!