1. On March 27, 1915, the Rapid City Public Library opened its doors for the first time in South Dakota. The library was established through a donation from philanthropist Andrew Carnegie and has since grown to become a vital community resource.

2. In 1860, on March 27, Franciscan missionary Father Peter DeSmet established the St. John's Mission in the present-day town of Fort Thompson. The mission served as a home for Native American orphans and provided both religious and academic education.

3. March 27, 1975, marks the founding of the Black Hills Ballet Theatre in Rapid City, South Dakota. The company has since become a prominent cultural institution in the region, offering performances of classical and contemporary dance.

4. Pierre, the capital city of South Dakota, was officially designated as the state capital on March 27, 1889. Prior to this, Yankton and then Huron served as the territorial capital.

5. On March 27, 1941, President Franklin D. Roosevelt signed an executive order creating the Badlands National Monument in western South Dakota. Today, the park is home to a diverse array of wildlife and geological formations, including layered rock formations known as "badlands."