After a 13-year hiatus, who’s playing at HFStival in DC?

One of the D.C. area’s most popular music festivals — the HFStival — is returning in September, and relocating to Nationals Park. After a week of buzz, generated last week by a post on social media, I.M.P and Nationals Park announced the lineup for the show, Saturday, Sept. 21. Billed as “one day, one stage,” headliners include The Postal Service and Death Cab For Cutie. Many of the bands in this year’s 11-band lineup played at earlier HFStivals at RFK …