1. The Dakota Territory was established on April 19, 1861. The territory included what is now South Dakota, North Dakota, and parts of Montana and Wyoming.

2. In 1910, former South Dakota Governor Charles Herreid signed a bill making Mount Rushmore a state monument. The monument features the faces of four U.S. presidents: George Washington, Thomas Jefferson, Theodore Roosevelt, and Abraham Lincoln.

3. On April 19, 1943, the South Dakota Capitol building in Pierre was damaged by a fire. The damage was estimated at $100,000, and the state government had to temporarily relocate to the State Library.

4. In 1965, the University of South Dakota's Coyote Student Center opened on April 19. The center serves as a hub for student activities and services at the university.

5. On April 19, 2018, South Dakota governor Dennis Daugaard signed a bill into law allowing for the cultivation and production of industrial hemp in the state. The move was seen as an opportunity for farmers to diversify their crops and potentially boost the state's economy.