Seriously there is only one thing you should all do this weekend and it's the Star-Spangled Weekend at Fort McHenry. It is the celebration of Defenders Day, the (sadly) little known state holiday in Maryland that commemorates the successful defense of Baltimore and Fort McHenry from a British attack on September 12,13,14, 1814. What the Brits attacked Baltimore? YES! Read your history books people!
Anyways, starting Friday there will be a parade from Little Italy to the Flag House and then to the Inner Harbor. Afterwards the parade will move through Tide Point to Locust Point and ending at Fort McHenry. There will be events all day Saturday with living historians (reenactors) and then a large concert and fireworks display at dusk.
So head down to the Fort and bring your copy of the Star Spangled Banner, and an umbrella since there is a chance of showers, and help bring back an old holiday!