1. On September 20, 1851, the first recorded discovery of gold in what is now known as Nevada was made by Mexican explorer Francisco Garces. Garces was exploring the desert terrain when he stumbled upon a large vein of gold.

2. In 1860, on September 20th, Nevada was officially admitted as the 36th state in the United States of America. The state was admitted during the height of the American Civil War, and its mining resources and strategic location were a significant factor in its admission.

3. On September 20, 1900, construction began on the Las Vegas and Tonopah Railroad, a critical transportation link that connected Las Vegas to other mining and ranching communities across Nevada. The railroad helped to spur economic growth and development throughout the state.

4. In 1955, on September 20th, the Frontier Hotel and Casino opened in Las Vegas. The Frontier was a popular destination for tourists and locals alike, featuring iconic entertainment acts and a storied history of organized crime involvement.

5. On September 20, 1991, professional boxer Mike Tyson was arrested in Las Vegas following allegations of rape. Tyson was ultimately convicted and served three years in prison, marking a significant moment in Nevada's legal and criminal justice history.