By the People Festival: At the inaugural By the People festival, created by the start-up incubator Halcyon House, artists will cover the District with yarn (as in Stacy Cantrell’s yarn-bomb at the Parks at Walter Reed), light (Nick Cave’s “Untitled” projection at Washington National Cathedral), fabric (Chloe Bensahel’s installation at Union Market) and more in a series of installations and performances, most of them free. There’s plenty to listen to at this self-described “arts and dialogue” festival, too, including talks from activist Yousef Bashir, astrobiologist Lucianne Walkowicz and psychiatrist Robert Waldinger. Through June 24. Times, prices and locations vary.