May 6 is a significant date in Arizona's history, marked by several noteworthy events. Here are five interesting facts about May 6 in Arizona history:

1. In 1887, Arizona became the 48th state to ban Chinese immigration. The Territorial Legislature passed an Act to Prohibit the Coming and Residence of Chinese and Mongolian Paupers, Criminals, and Contract Laborers, which imposed a $500 fine and six months imprisonment on any person who transported or employed Chinese laborers in Arizona. The law marked the beginning of Arizona's anti-immigrant sentiment.

2. In 1915, the Arizona State Legislature passed a bill granting women the right to vote ten years before the passage of the 19th Amendment. Arizona was the 10th state to grant women's suffrage, a move that brought the state national attention and recognition for its progressive stance.

3. In 1917, the United States declared war on Germany, and Arizona contributed thousands of troops to the war effort. The state's population of German nationals and German-Americans came under scrutiny, and many were subjected to interrogation and detention on suspicion of disloyalty. Arizona's role in World War I marked the beginning of the state's transformation into a military and aerospace hub.

4. In 1973, a fire broke out at the Arizona State Prison Complex in Florence, killing 23 inmates and injuring many others. The fire was caused by an electrical malfunction and spread quickly due to overcrowding and poor ventilation. The incident sparked a nationwide debate on prison conditions and rehabilitation, leading to reforms in Arizona's correctional system.

5. In 2017, the Arizona Diamondbacks retired Randy Johnson's number 51 in a ceremony at Chase Field. Johnson, a five-time Cy Young Award winner, spent eight seasons with the Diamondbacks and helped lead them to the 2001 World Series championship. The retirement of Johnson's number marked the third number retired by the Diamondbacks, joining Luis Gonzalez's number 20 and Jackie Robinson's number 42 (retired league-wide).

May 6 is a day of significant historical events in Arizona, showcasing the state's political, social, and cultural evolution over the years.