1. Arizona became a state on February 14, 1912, but it wasn't until May 4, 1912, that the state's first governor was inaugurated. George W. P. Hunt was elected as governor and served seven terms, making him the longest-serving governor in U.S. history.

2. On May 4, 1970, the Kent State shootings took place in Ohio, which had a ripple effect on college campuses throughout the country, including in Arizona. Students at Arizona State University held protests and demonstrations in the aftermath, calling for an end to the Vietnam War.

3. May 4, 1994, was a pivotal moment in Arizona's political history. That day, J. Fife Symington III became the first Arizona governor to be impeached and removed from office. Symington was found guilty of bank fraud and resigned as governor before he could be formally removed from office.

4. Arizona's desert environment is unique, and May 4, 2004, marked the completion of a years-long project to create the Desert Botanical Garden in Phoenix. The garden features more than 50,000 plants from around the world, all adapted to the desert climate.

5. May 4, 2019, was a day of celebration for thousands of Star Wars fans, who gathered at Phoenix's Chase Field for "Star Wars Night". Fans dressed up as their favorite characters and enjoyed a night of Star Wars-themed activities, as the Arizona Diamondbacks took on the Colorado Rockies.