1. On March 22, 1931, the city of Las Vegas officially legalized gambling. This decision paved the way for the development of the city's iconic casino industry.

2. The University of Nevada, Las Vegas was founded on March 22, 1957. The school has since become a major educational institution in the state and a leading research university.

3. On March 22, 1864, Nevada was admitted as the 36th state in the United States. This event marked an important milestone in the state's history and allowed it to participate fully in the political and economic life of the country.

4. On March 22, 1962, the Nevada Test Site witnessed the largest underground nuclear bomb test in history. The experiment, known as "Sedan," was part of the Cold War-era efforts to develop nuclear weapons and test their destructive power.

5. In 1933, the famous Hoover Dam, located on the border between Arizona and Nevada, was completed on March 22. The dam, which was built during the Great Depression, helped provide jobs and electricity to the region and has since become a major tourist attraction.