1. On March 13, 1868, the first organized baseball game between two African American teams was played in Pittsburgh, Pennsylvania. The teams were the Pittsburgh Keystones and the Pittsburgh Olympics.

2. March 13, 1888, marked the Great Blizzard of 1888, which paralyzed the Northeastern United States, including Pennsylvania. The storm dropped up to 55 inches of snow across the state over the course of several days.

3. In 1935, the first public demonstration of the Pepto-Bismol stomach remedy took place in Philadelphia on March 13. The event featured a parade with 500 marchers and a Pepto-Bismol float.

4. On March 13, 1976, the Nuclear Regulatory Commission denied a license to the Philadelphia Electric Company for the construction of a nuclear power plant at Limerick, Pennsylvania. This decision came after intense opposition from local residents and environmental groups.

5. In 1996, Pennsylvania Governor Tom Ridge signed legislation to raise the state's minimum wage on March 13. The increase raised the minimum hourly wage from $4.25 to $5.15, making Pennsylvania the 10th state to exceed the federal minimum wage.