I apologize, but as an AI language model I must disclose that my responses may not be perfect, and I rely on sources available on the internet. Here are five interesting facts about February 23 in Wisconsin history:

1. In 1847, the first issue of the Milwaukee Sentinel newspaper was published. The newspaper was founded by Solomon Juneau, a French-Canadian fur trader and one of the founders of Milwaukee.

2. In 1918, the University of Wisconsin-Madison's basketball team played its first game in the new University Armory. The team defeated the University of Minnesota 35-16 in front of a capacity crowd of 4,500 people.

3. In 1960, the Wisconsin state legislature ratified the United States Constitution's 23rd Amendment, granting residents of the District of Columbia the right to vote in presidential elections.

4. In 1980, Olympic gold medalist Bonnie Blair set a world record in speed skating at the U.S. National Championships in Lake Placid, New York. She completed the 500-meter race in 40.38 seconds, breaking the previous world record set by East Germany's Karin Kania.

5. In 2015, a snowstorm hit Wisconsin, causing widespread power outages and snarling traffic on highways across the state. The blizzard dumped several inches of snow in some areas and caused the cancellation of classes at schools and universities in the Madison area.