1. Maryland was founded on March 3, 1634
On March 3, 1634, the first English settlers arrived in the colony that they named Maryland in honor of Queen Henrietta Maria, the wife of King Charles I.

2. The Battle of Hancock took place on March 3, 1862
During the American Civil War, the Battle of Hancock was fought on March 3, 1862, in Washington County, Maryland. The Confederate Army tried to cut off the Baltimore and Ohio Railroad line, but Union forces were able to defend the area.

3. Thurgood Marshall was sworn in as the first African American U.S. Supreme Court Justice on March 3, 1967
Thurgood Marshall, a Maryland native, was sworn in as the first African American U.S. Supreme Court Justice on March 3, 1967. He served on the court for 24 years, retiring in 1991.

4. The National Aquarium in Baltimore opened on March 3, 1981
The National Aquarium in Baltimore, one of the largest and most visited aquariums in the United States, opened its doors on March 3, 1981. It is home to thousands of marine animals and features exhibits on dolphins, sharks, and other creatures of the sea.

5. The Baltimore Ravens won Super Bowl XLVII on March 3, 2013
On March 3, 2013, the Baltimore Ravens won Super Bowl XLVII, defeating the San Francisco 49ers 34-31. The win marked the second Super Bowl victory in the franchise's history.