1. On May 7, 1912, Arizona became the 48th state to join the United States of America. Prior to statehood, Arizona was a part of the New Mexico Territory and was made into its own territory in 1863.

2. In 1975, the city of Phoenix experienced its largest amount of rainfall in a single day on May 7, with 3.29 inches recorded at Phoenix Sky Harbor International Airport. This caused flooding throughout the city and led to several deaths.

3. On May 7, 1987, the Miller Peak Wilderness Area was established in Cochise County, Arizona. This protected area encompasses over 20,000 acres of land in the Huachuca Mountains and provides habitat for a variety of wildlife including black bears, mountain lions, and Mexican spotted owls.

4. The Sedona Film Festival, which began in 1994, is held annually in Sedona, Arizona and has been known to take place around May 7. This festival features independent films from around the world and has become a popular event for locals and tourists alike.

5. The University of Arizona, located in Tucson, celebrates its annual Spring Commencement around May 7. This ceremony marks the end of the academic year and the graduation of thousands of students from various programs and departments within the university.