1. North Dakota Statehood Day: September 17 marks the anniversary of North Dakota's statehood in 1889, when it became the 39th state to join the Union.

2. First Governor: John Miller became the state's first governor on September 17, 1889. He had previously served as a territorial governor before North Dakota became a state.

3. Red River Flood: In 1987, the Red River of the North rose to historic levels due to heavy snowmelt and rainfall, causing widespread flooding in Grand Forks and other parts of the state. September 17 was one of the days when the river reached its highest point, forcing thousands of residents to evacuate their homes.

4. Heritage Center Opening: The North Dakota Heritage Center, which houses the state's historical museum and archives, opened its doors on September 17, 1981. The center is home to many exhibits and artifacts that tell the story of North Dakota's history and culture.

5. Oil Discovery: On September 17, 1951, the North Dakota Oil and Gas Conservation Commission announced the discovery of a major oil field near Tioga in northwestern North Dakota. The discovery led to an oil boom in the region, which continues to this day.