1. The founding of Milwaukee: On April 30, 1816, a group of men led by Solomon Juneau arrived at the mouth of the Milwaukee River and established a trading post that would eventually become the city of Milwaukee. Juneau is now known as the "Father of Milwaukee."

2. The first Wisconsin state fair: The first Wisconsin State Agricultural Society fair was held in Janesville on April 30, 1851. The fair featured exhibits of agricultural machinery, livestock, and farm products.

3. Birth of a legendary boxer: Joe Gans, one of the greatest boxers of all time, was born in Baltimore, Maryland on April 30, 1874. Gans was the first African American boxer to hold a world championship title.

4. A historic baseball game: On April 30, 1946, the Milwaukee Brewers played their first home game in the American Association. The team defeated the Louisville Colonels 9-2 at Borchert Field.

5. A new governor takes office: On April 30, 2001, Scott McCallum was sworn in as the 43rd Governor of Wisconsin. McCallum served as governor for two years, following the resignation of Tommy Thompson to become the United States Secretary of Health and Human Services.