1. On October 5, 1867, the University of Wisconsin opened its doors for the first time. The school started with 17 faculty members and 237 students.

2. In 1908, Milwaukee hosted the World Series for the first time on October 5. The Chicago Cubs defeated the Detroit Tigers 10-6 in front of 14,543 fans at West Side Grounds.

3. On October 5, 1892, the first electric streetcar in Wisconsin made its debut on Milwaukee's East Side. The streetcar was one of three lines opened by the Milwaukee Electric Railway and Light Company that year.

4. Wisconsin’s state flower is the wood violet, which was designated as the state flower on October 5, 1909. The wood violet is a small purple and blue wildflower that can be found throughout the state.

5. On October 5, 1955, Wisconsin Senator Joseph McCarthy suffered a defeat when the United States Senate voted to censure him for misconduct in his investigations of alleged communism. The vote effectively ended his power and influence in the Senate.