1. Chesapeake Bay Bridge-Tunnel Opened (1964)
On September 24, 1964, the Chesapeake Bay Bridge-Tunnel officially opened to traffic. The bridge-tunnel spans 17.6 miles and connects the eastern shore of Virginia with the Delmarva Peninsula. It is considered one of the 7 engineering wonders of the modern world.

2. Battle of North Point (1814)
On September 24, 1814, the Battle of North Point took place in Baltimore County during the War of 1812. The American forces were able to hold off the British, delaying their advance towards Baltimore for a day. This gave the American forces time to strengthen the defenses of Fort McHenry, which was successfully defended against the British attack the following day.

3. First Public High School in America (1827)
On September 24, 1827, Baltimore City College, the first public high school in America, opened its doors to students. The school originally offered only classical studies, but later added modern subjects such as science and engineering.

4. Maryland's Ratification of the U.S. Constitution (1788)
On September 24, 1788, Maryland became the 7th state to ratify the United States Constitution. The state's support was instrumental in securing the necessary 9 states for the Constitution to go into effect.

5. Thurgood Marshall Sworn In as Supreme Court Justice (1967)
On September 24, 1967, Thurgood Marshall, a Baltimore native, was sworn in as the first African American Supreme Court justice. He served on the Court for 24 years, until 1991. Marshall was a prominent civil rights attorney before his appointment to the Court, having argued and won the landmark case Brown v. Board of Education.