1. On February 5, 1936, the South Dakota State Capitol was officially dedicated. The building took four years to construct and cost approximately $2 million. It remains an iconic landmark in the capital city of Pierre.

2. February 5, 1919, is the date when South Dakota ratified the 18th Amendment to the United States Constitution, which prohibited the manufacturing, sale, and transportation of alcohol. This amendment was later repealed by the 21st Amendment in 1933.

3. In 1972, South Dakota became the first state to lower the voting age from 21 to 18. This change was made in response to the widespread protests during the Vietnam War, which argued that if 18-year-olds were old enough to fight and die for their country, they were also old enough to vote.

4. February 5, 1937, was the date when South Dakota's most famous political figure, George S. Mickelson, was born. Mickelson served as the state's governor from 1987 until his death in 1993, when he was tragically killed in a plane crash while on a state mission.

5. On February 5, 1933, a massive blizzard struck South Dakota and several other states in the Midwest. Known as the "Great Dust Storm," it was one of the worst weather events in the region's history, causing widespread damage and uprooting many families. The storm was later immortalized in John Steinbeck's novel "The Grapes of Wrath."