1. On January 10, 1868, the Arizona Territory was officially established by an act of Congress. This event set the stage for the eventual admission of Arizona as a state on February 14, 1912.
2. In 1911, on January 10th, a group of women in Tucson founded the Arizona Historical Society. This organization has since grown to become an important resource for preserving and promoting the history of the state.
3. On January 10, 1930, the first professional basketball game was played in Arizona. The Phoenix Professional Basketball Team, coached by Charles "Pop" McKale, defeated the visiting Hollywood Athletic Club 27-23 in front of a packed house at the Madison Square Garden in Phoenix.
4. The temperature in Phoenix reached an all-time high of 83 degrees Fahrenheit on January 10, 2013. This was just one degree shy of the record for the warmest January day in the city's history.
5. In 2018, on January 10th, Arizona Senator Jeff Flake made a highly publicized speech on the floor of the U.S. Senate denouncing President Donald Trump's attacks on the news media. The speech garnered widespread attention and solidified Flake's reputation as a Republican dissident during the Trump era.