1. On June 17, 1919, Arizona became the 17th state to ratify the 19th Amendment to the United States Constitution, granting women the right to vote.

2. On June 17, 1933, Governor Benjamin Baker Moeur signed a bill creating the Arizona State Parks system, which now boasts over 30 parks throughout the state.

3. In 1962, a sniper climbed to the top of a water tower in Phoenix and began firing at pedestrians, resulting in two deaths and eight injuries before being apprehended by police.

4. On June 17, 1997, the Arizona Diamondbacks played their first home game at Bank One Ballpark (now called Chase Field) in downtown Phoenix.

5. In 2014, Arizona State University announced a major discovery in the field of astrophysics: a distant galaxy that contained the oldest known star in the universe, estimated to be 13.6 billion years old. This announcement was made on June 17 of that year.