1. In 1885, the Baltimore Orioles won the American Association Pennant. This was the first of three consecutive championships the team would win in the league.

2. On September 30, 1942, the Chesapeake Bay Bridge-Tunnel was officially opened to traffic. This 23-mile long structure connects the eastern and western shore of the Chesapeake Bay, making it the largest bridge-tunnel complex in the world.

3. In 1955, the United States Naval Academy moved from its original location in Annapolis to its current location in Severn. The move was made to accommodate the growing number of midshipmen and to provide a larger campus.

4. The Maryland Renaissance Festival, which takes place every year from August to October, typically wraps up its season on September 30. This festival features jousting tournaments, traditional music, and other period-themed entertainment.

5. In 2019, the Baltimore Ravens defeated the Cleveland Browns 40-25 in a regular season NFL game. The Ravens, led by quarterback Lamar Jackson, went on to finish with a 14-2 record and earn the top seed in the AFC playoffs.