That was fun, let's do it again

The crowd at the main stage during Of Monsters and Men

Before wrapping up Sunday night, the Boston Calling Music Festival announced that it will be back on Boston's City Hall Plaza on Sept. 7 and 8 with Vampire Weekend, Passion Pit, Kendrick Lamar, Gaslight Anthem, and several others.

Aaron Dessner of the National will once again curate the modern-rock fest, and the announcement came during his band's headlining set Sunday night.

Early bird tickets go on sale May 31.

Before the National's set, Of Monsters and Men whipped up sing-along after sing-along with its lavishly arranged folk pop.

Young the Giant played its first show in several months, emerging from the studio to pepper new tracks among the alt-rock staples from its self-titled debut. Singer Sameer Gadhia noted the band's first Boston show was two years ago at Great Scott in Allston, capacity 240. Yesterday, the band preceded the headliner with a crowd of 19,500 on hand.

Personal fave award on Sunday goes to Andrew Bird who was simply encyclopedic in scope but completely chill in attack.

And for MVP yesterday: the sun.

Look forward to September.