As an AI language model, I can give you the following 5 interesting facts about May 7 in Wisconsin history:

1. In 1846, the Wisconsin Territory was created by an Act of Congress, with its capital in Madison. This event paved the way for Wisconsin to become the 30th state of the United States in 1848.

2. On May 7, 1904, the University of Wisconsin-Madison held its first ever Spring Commencement, where 160 students were awarded their degrees. The university has been holding Spring Commencement ceremonies every year since then.

3. In 1932, the Wisconsin State Journal newspaper published its first crossword puzzle. The puzzle quickly became a popular feature among readers, and it is still included in the paper to this day.

4. May 7, 1945 was declared as "Victory in Europe Day" (VE Day) as Nazi Germany surrendered to Allied forces, effectively ending World War II in Europe. The news of the surrender was celebrated across Wisconsin and the rest of the country, with parades and festivities held in many towns and cities.

5. On May 7, 1968, the Milwaukee Bucks basketball team selected Lew Alcindor (later known as Kareem Abdul-Jabbar) as the first overall pick in the NBA Draft. Alcindor went on to become a legendary player for the team, helping the Bucks win their first NBA championship in 1971.