1. In 1909, a law was passed in South Dakota allowing for the establishment of rural mail routes. This greatly improved mail delivery in South Dakota's rural areas.

2. On April 27, 1946, a severe blizzard hit South Dakota, causing widespread damage and loss of life. The storm, known as the "Blizzard of '46," dumped several feet of snow in some areas and knocked out power and communication lines.

3. In 1973, a fire broke out at the Mount Rushmore National Memorial in South Dakota, damaging part of the famous monument. The fire was caused by a construction worker's blowtorch and took five months to repair.

4. On April 27, 1995, a tornado outbreak hit parts of South Dakota, causing significant damage in several communities. One tornado in the town of Woonsocket destroyed over 20 homes and injured 14 people.

5. In 2002, the Black Hills Playhouse in Custer State Park opened its doors for its 57th season. The playhouse, which was founded in 1946, has become a beloved institution in South Dakota's cultural scene, offering theater productions and educational programs.