1. In 1754, the first American newspaper was published in Philadelphia, PA. Called "The Pennsylvania Gazette," the newspaper was founded by Benjamin Franklin and quickly became popular for its informative and entertaining content.

2. On May 9, 1914, the first Mother's Day holiday was celebrated in the United States. The holiday was the idea of Anna Jarvis, who wanted to honor her own mother and all mothers for their sacrifice and dedicated to their children.

3. In 1945, German forces in Europe officially surrendered to the Allies on May 9. This date is known as Victory in Europe Day (VE Day) and is celebrated as a significant victory in World War II.

4. On May 9, 1973, the Pennsylvania State Police and the Philadelphia Police Department conducted a controversial raid on the headquarters of the radical group MOVE in the city's Powelton Village neighborhood. The raid resulted in the death of one police officer and several MOVE members.

5. In 1988, the Pennsylvania Supreme Court ruled that public school funding was unconstitutional, leading to significant changes in the way schools were funded in the state. The case, known as "Williamson School District v. Commonwealth," was a landmark decision that influenced education policy across the country.