1. First Woman Elected to the State Legislature: On November 5, 1894, Lillie M. F. Peck was elected as the first woman to the South Dakota state legislature. She represented the State House of Representatives and served for two years.

2. Mount Rushmore Completed: On November 5, 1941, the Mount Rushmore National Memorial was completed. The monument's four carved heads of U.S. presidents ― George Washington, Thomas Jefferson, Abraham Lincoln, and Theodore Roosevelt ― cost $989,992.32 and took 14 years to complete.

3. South Dakota Voters Approve Medical Marijuana: On November 5, 2020, South Dakota voters passed Amendment A, which legalized the possession, use, transportation, and distribution of marijuana for people who are 21 years old or older.

4. Black Hills Flood: On November 5, 1974, the Black Hills of South Dakota experienced a devastating flood that took 238 lives and caused significant damage in the region. The storm dropped over 14 inches of rain in six hours, causing the Rapid Creek to overflow its banks.

5. Statehood Admission Day: On November 5, 1889, South Dakota became the 40th state of the United States. That day, the Dakota Territory was divided into North and South Dakota, and South Dakota was admitted to the Union as a state.