1. Maryland Day: March 30th marks the anniversary of the founding of the Maryland colony in 1634. On this day, a group of colonists led by Governor Leonard Calvert landed on St. Clement's Island, near present-day St. Mary's City. This event is celebrated as Maryland Day, a state holiday in Maryland.

2. The first woman governor: On March 30, 1987, Maryland made history by swearing in its first female governor. Lieutenant Governor J. Joseph Curran became acting governor when Governor William Donald Schaefer resigned to become head of the Environmental Protection Agency.

3. The assassination of Malcolm X: On March 30, 1964, civil rights leader Malcolm X gave a speech in Maryland just weeks before he was assassinated. In his speech, he criticized the government and called for black self-defense.

4. The Battle of Snow Hill: During the Civil War, on March 26-30, 1865, Union forces under General J. Kilpatrick defeated Confederate forces in the Battle of Snow Hill. The battle took place in Worcester County, Maryland, and resulted in an estimated 70 casualties.

5. The first telegraph sent: On March 30, 1844, Samuel Morse sent the first telegraph message from Washington, D.C., to Baltimore, Maryland. The message, "What hath God wrought," was transmitted over a wire that ran 40 miles between the two cities.