Photograph courtesy Smithsonian's National Zoo (where you still need to wear a mask). As the guidance around wearing masks continuously changes, it’s hard to keep track of where you can and can’t go maskless. Maryland Governor Larry Hogan and Virginia Governor Ralph Northam both lifted mask requirements for fully vaccinated people in their states on May 14. Most recently, DC Mayor Muriel Bowser lifted both indoor and outdoor mask mandates for fully vaccinated people unless a business specifically requests otherwise. More changes are coming. Starting Friday, May 21, most restrictions on public and commercial activity will be lifted. On June 11, bars, nightclubs, and large entertainment venues will be allowed to fully reopen.