1. In 1889, South Dakota became the 40th state in the United States of America on January 10th. This day is officially recognized as South Dakota Statehood Day, a state holiday.

2. On January 10th, 1932, the South Dakota state flag was officially adopted. The flag features a blue field with a yellow sun in the center, surrounded by the state name and the year of statehood, 1889.

3. In 1901, Carrie Chapman Catt, a prominent suffragette and founder of the League of Women Voters, delivered a speech in Watertown, South Dakota on January 10th in support of women's suffrage. South Dakota was one of the first states to grant women the right to vote in 1890.

4. On January 10th, 1978, the worst blizzard in the state's history hit South Dakota. The storm lasted for three days and dropped over 3 feet of snow, causing hundreds of deaths and millions of dollars in damages.

5. In 1984, South Dakota Governor Bill Janklow declared January 10th as "Lloyd Magargal Day" in honor of the state's first photographer. Magargal took some of the earliest known photographs of South Dakota's history, including images of the state's Native American tribes and early settlers.