1. Nevada Statehood Day: September 30, 1864, marks the day Nevada became the 36th state to join the United States. On this day, President Abraham Lincoln signed the proclamation that made Nevada a state, after receiving its statehood bill from Congress.

2. Founding of Las Vegas: On September 30, 1905, the city of Las Vegas was officially founded. It was established as a result of the construction of the Union Pacific Railroad in the area. Las Vegas would eventually become one of the most well-known cities in the world, thanks to its thriving casino and entertainment industry.

3. First Airmail Delivery: The first airmail delivery in Nevada occurred on September 30, 1920. The flight was from Elko to Reno and was operated by the United States Post Office using a Curtiss JN-4 airplane. Airmail delivery revolutionized the way mail was transported and delivered in the United States.

4. Atomic Testing: The last atmospheric nuclear test conducted by the United States took place in Nevada on September 30, 1961, as part of Operation Nougat. The test, codenamed "Sedan," was a massive underground explosion that created a crater over 300 feet deep and 1,200 feet wide.

5. Death Penalty Abolished: On September 30, 2020, the state of Nevada abolished the death penalty, becoming the 24th state to do so. Governor Steve Sisolak signed a bill into law that commuted the sentences of all death row inmates in the state to life in prison without the possibility of parole. The decision was hailed as a major victory for human rights and criminal justice reform.