Finally. It’s taken more than a year, but reunited college-rock icons The Replacements finally will play a hometown gig this September, as the band has been announced to headline the soon-to-be-razed Midway Stadium in St. Paul, marking the first Twin Cities appearance by the ‘Mats since 1991.

Coachella’s second weekend is under way now, and The Replacements took the stage tonight for the second of the reunited band’s appearances at the two-weekend fest — and dropped a big surprise on the crowd, as Green Day’ Billie Joe Armstrong joined the ‘Mats for part of the band’s set.

Since reuniting last summer for their first shows in 22 years, The Replacements have been nothing if not cagey about their intentions, and that continues with the band’s posting on Facebook this afternoon of an unexplained 12-second clip of “Can’t Hardly Wait” being performed live in an undisclosed recording studio.

It’s perhaps not surprising that The Replacements’ reunion has been a ramshackle affair, with the band playing three festivals last year, and, at this point, slated to perform five more times this spring and summer. To hear bassist Tommy Stinson tell it, that may continue for a while.

Following the first-ever U.S. vinyl release of The Replacements’ final album, 1990′s All Shook Down, on Record Store Day’s Black Friday later this month comes word that bandleader Paul Westerberg’s second solo effort, 1996’s Eventually, also will make its debut on vinyl early next year.

The Replacements staged their third of three announced reunion shows last night in a dusty farm field about 45 minutes east of Denver, the site of the third installment of this summer Riot Fest and what may or may not have been the final appearance by the 2013 incarnation of the ‘Mats, performing for the first time in 22 years.