1. Statehood Day: September 1 marks the anniversary of Wisconsin's admission to the Union as the 30th state in 1848. On this day, Wisconsinites celebrate their state's rich history and culture.

2. Labor Day: Since 1894, the first Monday in September has been observed as a federal holiday in honor of the contributions of workers to American society. Wisconsin is known for its strong labor traditions and is home to several influential unions.

3. Early Settlement: On September 1, 1679, the French explorer Jacques Marquette and his guide, Louis Joliet, set out on their journey down the Wisconsin River, which led to the establishment of the first European settlement in the area.

4. Famous Birthdays: Wisconsin has produced several notable figures who were born on September 1, including author Edgar Rice Burroughs (1875), football coach Woody Hayes (1913), and actor Barry Gibb (1946).

5. World War II: On September 1, 1939, Germany invaded Poland, which led to the beginning of World War II. Wisconsin played a significant role in the war effort, with thousands of residents serving in the armed forces and the state's manufacturing industries producing essential supplies for the military.