1. Nevada officially became a state on September 4, 1864, during the height of the Civil War. President Abraham Lincoln signed the statehood proclamation despite concerns about the small population of the territory.

2. In the early morning hours of September 4, 1949, a magnitude 7.1 earthquake struck the town of Fallon, Nevada. The quake caused extensive damage to buildings and infrastructure in the area, and several aftershocks were felt over the following days.

3. On September 4, 1995, former heavyweight boxing champion Mike Tyson was released from the Indiana Youth Center after serving three years for rape. He immediately traveled to Las Vegas to train for his comeback fight against Peter McNeeley, which he won in 89 seconds.

4. In 1998, the MGM Grand Hotel and Casino in Las Vegas opened its $1 billion CityCenter project on September 4. The development included several hotels, casinos, and entertainment venues, and was one of the largest private construction projects in U.S. history.

5. On September 4, 2015, the Nevada Gaming Control Board approved new regulations allowing skill-based gaming machines to be placed in casinos throughout the state. The move was seen as an attempt to attract younger players to the gambling floor and keep up with changing consumer trends.