1. Statehood: On April 30, 1889, North Dakota became an official member of the United States as the 39th state along with South Dakota.

2. Theodore Roosevelt’s Visit: On April 30, 1910, Theodore Roosevelt, the former President of the United States, made a visit to Bismarck, North Dakota. This visit was part of a tour conducted by Roosevelt called "The Insurgent Republican Tour."

3. Disastrous Tornado: On April 30, 1967, a devastating tornado struck Fargo, North Dakota. The tornado caused extensive damage to the city and injured 88 people. It was the deadliest tornado in North Dakota history, claiming the lives of 7 people.

4. Successful Landing on Mars: On April 30, 1999, North Dakota native and NASA astronaut, Karen Nyberg, played a critical role in the successful landing of the Mars Polar Lander on the surface of Mars. Nyberg served as the flight engineer for the mission and was responsible for ensuring the safe landing of the spacecraft.

5. Governor Dalrymple Announces Retirement: On April 30, 2015, North Dakota Governor Jack Dalrymple announced that he would not be seeking re-election in 2016. Dalrymple had served as the Governor of North Dakota since 2010 and was credited with helping the state navigate a period of rapid growth and economic expansion.