(DC) (National Mall) The Smithsonian marks the first Saturday of summer—Solstice Saturday—by staying open late and hosting programs and performances throughout the day and night. Many of the museums on the National Mall will have extended hours, with two museums staying open until midnight. View participating museums and details below.

Solstice Saturday is held in association with Hofstra University’s Department of Physics and Astronomy. Hofstra University’s Astronomy Festival on the National Mall takes place Saturday, June 22, 6–11 p.m., in front of the Hirshhorn Museum.