1. In 1836, John Edgar Thompson, the man who would later become the first President of the Pennsylvania Railroad, was born in Sharpsburg, Michigan.

2. The Michigan State Capitol building was officially dedicated in Lansing on June 23, 1879. Over 10,000 people attended the ceremony, which included speeches, music, and fireworks.

3. On June 23, 1936, Michigan celebrated its centennial as a state. The day was filled with parades, pageants, and other festivities across the state.

4. The first Detroit Grand Prix was held on Belle Isle on June 23, 1984. The race was won by Brazilian driver Emerson Fittipaldi, driving for the Marlboro McLaren team.

5. In 2015, the city of Flint, Michigan declared a state of emergency due to lead contamination in the city's water supply. The crisis has since become a major national issue, and has led to calls for greater investment in infrastructure and environmental protection across the country.