The new dates are part of MMJ’s “Spontaneous Curation Series,” in which fan club members and concertgoers help the band come up with each night’s setlist through Twitter. Fans can submit songs as far back as 1999’s The Tennessee Fire because the series will feature rarities and tunes from all six of MMJ’s studio albums.

Members of the MMJ “Roll Call” fan club will have the honor of choosing the opening song on each and every show of the tour, including festival appearances. The Roll Call members will be getting details soon on how to participate.

Fans will want to follow MMJ on Twitter to play along with “Encore Curation.” The band will send out tweets days before every show with further instructions about how to submit songs for the nightly encores.

The “Spontaneous Curation Series” begins with MMJ’s previously announced European tour, which kicks off June 16 at Azkena Rock Festival in Vitoria, Spain. Previously announced U.S. dates are booked Aug. 3-26.

The new West Coast tour stars off Sept. 7 in Redmond, Wash., at Marymoore Amphitheatre, followed by Sept. 8 in Troutdale, Ore., at McMenamins Edgefield Amphitheatre and Sept. 9 in Boise at Idaho Botanical Garden.

Jim James and the guys then head to California for three nights in Los Angeles at The Wiltern Sept. 11-13. The final stop on the route is Sept. 15 in Berkeley, Calif., at the Greek Theatre.   

Iron and Wine support Sept. 12, and Shabazz Palaces open Sept. 7-9, Sept. 13 and Sept 15. The Sept. 11 support act hasn't been announced yet.

A presale for select dates begins June 7. Tickets go on sale to the general public June 8. My Morning Jacket will donate $1 from every U.S. ticket sold to a local charity.

For more information visit MyMorningJacket.com