1. In 1848, Wisconsin became the 30th state to join the United States of America on January 31. This event is celebrated every year in Wisconsin as "Statehood Day."

2. The first ever official Groundhog Day procession was held on January 31, 1887 in Sun Prairie, Wisconsin. The event tradition has continued in many places around the world with the famous weather-predicting Punxsutawney Phil.

3. On January 31, 1916, the Wisconsin State Capitol building in Madison was officially dedicated. Built between 1906 and 1917, it is considered one of the most beautiful state capitols in the nation.

4. In 1985, the Milwaukee Bucks basketball team played their first game at the Bradley Center in Milwaukee on January 31. The team has since moved to a new arena called the Fiserv Forum.

5. On January 31, 2014, Governor Scott Walker signed a bill legalizing the use of cannabidiol (CBD) oil for medical purposes in Wisconsin. This marked a major step forward in the state's approach to alternative medicine and pain management.