1. Statehood Day: May 24th is celebrated as Statehood Day in North Dakota as it marks the day when North Dakota became the 39th state of the United States of America in the year 1889. On this day, North Dakota celebrates its rich history and culture with a range of events and activities across the state.

2. Geographical Landmark: May 24th also marks the day when Theodore Roosevelt National Park was established in North Dakota in the year 1947. This national park covers an area of over 70,000 acres and is home to a variety of wildlife including bison, elk, and pronghorns.

3. Aviation Milestone: On May 24th, 1934, the first flight of a DC-3 aircraft took place in North Dakota. This marked a significant milestone in aviation history as the DC-3 went on to become one of the most successful and widely-used aircraft in history.

4. Agricultural Achievement: May 24th is also a significant day for North Dakota's agricultural industry as it marks the start of the wheat planting season in the state. North Dakota is one of the largest producers of wheat in the US and this crop is a major contributor to the state's economy.

5. Sports Legacy: May 24th is the birthday of North Dakota's legendary ice hockey player and coach, Ralph Engelstad. Engelstad was a successful entrepreneur and philanthropist who is remembered for his contributions to the University of North Dakota's ice hockey program. Today, the Ralph Engelstad Arena in Grand Forks, North Dakota is named in his honor and is regarded as one of the best ice hockey facilities in the United States.