As an AI language model, I don't have personal beliefs or opinions, but I can provide the following information about five interesting facts regarding March 17 in South Dakota history:

1. St. Patrick's Day: March 17th is the celebrated St. Patrick's Day all across the United States, and South Dakota is no exception. The state's vibrant Irish-American community, which flourishing since the 19th century, celebrates the occasion with numerous parades, festivals, and green-themed events.

2. Statehood Day: March 17th is also a significant day in South Dakota's history as it is the state's official Statehood Day. On this day in 1889, South Dakota was admitted as the 40th state to the Union by President Benjamin Harrison.

3. Black Hills Archaeology: The 17th of March marked the birth anniversary of Richard Pettigrew, a well-known South Dakota politician and historian. Pettigrew made a significant contribution to the study of Black Hills archaeology, uncovering many exciting discoveries that have since helped researchers better understand the region's rich prehistoric past.

4. Military History: South Dakota has a rich military history, and March 17th has some notable events in this department. In 1967, U.S. Air Force Captain Lance Sijan, a South Dakota native, was posthumously awarded the Medal of Honor for his bravery and heroism during the Vietnam War. On the same day in 1993, U.S. Army medevac pilot, Chief Warrant Officer David Petrosky, was killed in action during Operation Gothic Serpent in Somalia.

5. Weather Records: South Dakota is known for its extreme weather conditions, and March 17th has seen some remarkable records. In 1941, the town of Custer set the state's lowest temperature ever recorded at -58°F (-50°C). In 1926, the state's earliest recorded tornado reportedly touched down north of Brookings. Lastly, in 1919, the longest run of consecutive days with snow on the ground ended at 127 days in Watertown, SD.