1. On May 19, 1910, Arizona became the 48th state admitted to the United States of America. The signing of the Enabling Act by President William Howard Taft allowed Arizona to draft a constitution and be admitted as a state.

2. In 1937, on May 19, the Golden Gate Bridge in San Francisco, California opened to the public. The steel used in the construction of the bridge was manufactured in Phoenix, Arizona by the Bethlehem Steel Company.

3. On May 19, 1973, the Navajo Nation Council passed legislation granting women the right to vote in tribal elections. This made the Navajo Nation one of the first Native American tribes to grant women the right to vote.

4. On May 19, 1975, the Phoenix Suns advanced to the NBA Finals for the first time in franchise history. Although they lost in the Finals to the Boston Celtics, it was a significant moment for basketball in Arizona.

5. On May 19, 2014, an EF3 tornado touched down in northern Arizona, causing significant damage to the towns of Bellemont and Flagstaff. The tornado was one of the strongest and most destructive tornadoes to hit the state in recent history.