After several years in the works, the National's massive Grateful Dead tribute is finally here. Day of the Dead, a 59-track, six-hour-long all-star box set, is out May 20 via 4AD. Like the 2009 compilation Dark Was the Night, also spearheaded by Aaron and Bryce Dessner, Day of the Dead is a benefit for Red Hot, the HIV/AIDS not-for-profit. The project features Dead covers by the National, Wilco, the Flaming Lips, Courtney Barnett, Anohni, the War on Drugs, Bruce Hornsby with Justin Vernon's band DeYarmond Edison and Megafaun, Bill Callahan, the Walkmen, Kurt Vile and J Mascis, Jenny Lewis, TV on the Radio's Tunde Adebimpe, Unknown Mortal Orchestra, Real Estate, Perfume Genius with Sharon Van Etten, Fucked Up, My Morning Jacket's Jim James, Bonnie "Prince" Billy, members of Grizzly Bear, Phosphorescent, Terry Riley and his son Gyan, Stephen Malkmus, Lucinda Williams, Angel Olsen, Sonic Youth's Lee Ranaldo, Yo La Tengo's Ira Kaplan, Cass McCombs, Arcade Fire's Richard Reed Parry, the Band's Garth Hudson, Caroline Shaw, and many others. Find the tracklist below.

The compilation was produced by Aaron Dessner and co-produced by Bryce Dessner and Josh Kaufman. Several songs feature the house band: the Dessners, Scott and Bryan Devendorf (also of the National), Kaufman, Conrad Doucette, Sam Cohen, and Walter Martin (the Walkmen). Day of the Dead will be available digitally, as a 5xCD set, and as a limited edition vinyl box set.

It was previously announced that an all-star Day of the Dead set would take place at this year's Eaux Claires (August 12-13), the festival co-curated by Aaron Dessner and Justin Vernon. The lineup has now been announced. The National will be joined by Vernon, Jenny Lewis, Phosphorescent's Matthew Houck, Will Oldham, Sam Amidon, Richard Reed Parry, Lucius, Bruce Hornsby, and UMO's Ruban Nielson.

Below the tracklist, find quotes from Bill Callahan, Tunde Adebimpe, and Will Oldham about Day of the Dead and the Grateful Dead's influence.

Day of the Dead: