High On Fire will be celebrating twenty years as a band in 2018 and will be touring to celebrate the occasion. While no dates have been announced, High On Fire is currently taking requests for the tour's setlist and has dubbed the tour "Twenty Sunless Years with High On Fire." You can hit the band up on Facebook here for requests, and I'd imagine you'll also hear some new material on the tour as High On Fire is currently working on a new album.
Plus Sleep is coming out with a new album in 2018 too, so hey – maybe we'll get a High On Fire / Sleep tour.