1. Arizona became a state on February 14, 1912, but it wasn't until the leap year of 1916 that residents experienced their first February 29 as Arizonans.
2. In 1940, February 29 was also known as Rare Disease Day in Arizona, which was established to raise awareness about lesser-known medical conditions.
3. In 1960, Arizona celebrated its first Leap Year Festival, which included a golf tournament, a parade, a dance, and the crowning of the first Leap Year Queen.
4. On February 29, 1972, Arizona State University student and Vietnam War protester Denis Henigan was killed by police during a demonstration. The incident sparked protests and led to changes in police procedures for handling public demonstrations in Arizona.
5. In 2008, Arizona's first-ever Leap Year Ball was held in Tucson, featuring music, dancing, and a "leapfrog zone" for attendees to try their luck at jumping over a line of people.