Because Arizona became a state on Feburary 14, 1912. And Feburary 14 is Valentine's Day.
In 1912, the population of Arizona was about 200,000. Even with that small population, it became a state on Valentine's Day of that year.
Arizona
Sandra Day O' Connor came from Arizona, but her family's ranch covers parts of both Arizona and New Mexico, because it is on the borderline.
Arizona became a state on February 14, 1912.
Arizona!
Honestly, Arizona doesn't have many special holidays, but Arizona became a state on the same day as Valentine's Day.
June 30th would be the last day to apply for state grants in Arizona. That is the last day of the fiscal year. Fafsa.ed.gov is where I obtained this information.
Present day Arizona was home to the Hopi peoples.
The Arizona state holidays include all of the U. S. Federal holidays except Columbus Day and Inauguration Day, plus Christmas Eve.
Arizona became a state on February 14, 1912. It was the 48th state.
Arizona