December 22 in Nevada history is significant in many ways as it marks some important events that have a long-lasting impact on the state. Here are five interesting facts about December 22 in Nevada history:

1. Statehood Day: December 22 marks the Statehood Day of Nevada. In 1864, President Abraham Lincoln signed the proclamation that officially made Nevada the 36th state of the union. It is the only state to be admitted to the union during the Civil War.

2. Hoover Dam Completion: On December 22, 1935, the construction of the Hoover Dam was finally completed. The dam, located on the Colorado River, between Arizona and Nevada, is a engineering marvel and provides power and water to millions of people across several states.

3. Organized Crime: On December 22, 1967, federal agents arrested Anthony Spilotro, a notorious mobster, in Las Vegas. Spilotro was known for his involvement in organized crime and was the inspiration for the character of Nicky Santoro in the movie Casino.

4. Electrical Disruption: On December 22, 2011, a powerful storm hit northern Nevada knocking out power to thousands of people. It was one of the worst electrical disruptions in the state's history.

5. Severe Flooding: In 1982, December 22 marked one of the worst floods in Nevada's history. Heavy rainfall caused the Truckee River to overflow its banks, and widespread flooding occurred in Reno and Sparks causing severe damage to homes, businesses and infrastructure.

In conclusion, December 22 holds an important place in the history of Nevada as it marks the Statehood Day, the completion of the Hoover Dam, and significant events related to organized crime, severe flooding, and electrical disruptions.