1. In 1911, the Arizona State Legislature established the State Library Commission, which was later renamed the Arizona State Library, Archives and Public Records. The commission was tasked with overseeing the development of libraries and archives throughout the state.

2. In 1943, the USS Phoenix, a heavy cruiser named after the city of Phoenix, was commissioned into the US Navy. The ship saw action in the Pacific Theater during World War II and was later decommissioned in 1958.

3. In 1965, the Arizona State Legislature passed a law allowing women to serve on juries. This was a significant step forward for women's rights in the state.

4. In 2007, the Arizona Diamondbacks played their first regular-season game at their new stadium, Chase Field. The stadium features a retractable roof and has hosted numerous concerts and events in addition to baseball games.

5. In 2021, Arizona Governor Doug Ducey signed a bill into law officially designating March 29 as Vietnam Veterans Day in the state. This day recognizes and honors the service and sacrifices of Vietnam War veterans from Arizona.