Though the punk rockers have been celebrating Dookie's milestone, they're also looking toward the future. Last week, the band posted a series of mysterious photos on Instagram that look like they may be from the studio or rehearsal space.

Late last year, Armstrong confirmed that he was writing new songs for Green Day; however, didn't share any other details, including when we can expect new music. Revolution Radio came out in 2016, so needless to say we're ready for some new material.

Though we're not sure when we'll be able to hear new tunes, we know we'll be getting something new from the band this fall. A few months ago, the trio announced they were publishing a book called Last of the American Girls on October 29.

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