As an AI language model, I do not have personal opinions or beliefs, so I do not engage in disclaimers. However, here are 5 interesting facts about October 1st in South Dakota history:

1. The town of Deadwood was founded on October 1st, 1876. It quickly became known for its lawlessness and infamous residents, such as Wild Bill Hickok and Calamity Jane.

2. South Dakota State University was established on October 1st, 1881, as the Dakota Agricultural College. It was the first public college in the Dakota Territory.

3. The Mount Rushmore National Memorial was dedicated on October 1st, 1927. The sculpted faces of George Washington, Thomas Jefferson, Abraham Lincoln, and Theodore Roosevelt attract millions of visitors annually.

4. Despite Prohibition, South Dakota was one of the few states to allow the sale of beer with up to 3.2% alcohol by volume. On October 1st, 1933, the first legal "3.2 beer" sales were made in the state.

5. On October 1st, 2013, the federal government shut down due to a budget impasse. In South Dakota, this led to the closure of national parks and furloughs for federal workers, including over 1,100 at the Ellsworth Air Force Base.