Ahoy Scallywags!  Have ye ever wondered how to navigate the sea? Or what makes a sailing ship move? Visit the museum for Pirate Day and make your own map, explore the meaning of the “Jolly Roger” and other pirate flags, and sing pirate shanties (11am, 1pm, 3pm). 11am-4pm, Calvert Marine Museum, Solomons, $9 admission w/discounts: calvertmarinemuseum.com.