1. Arizona was officially declared a state on January 15, 1912. The area had been a part of the New Mexico Territory until this date, when it officially became the 48th state of the United States.

2. On January 15, 1929, Martin Luther King Jr. was born in Atlanta, Georgia. While he did not have a direct impact on Arizona history, his work to promote civil rights helped shape the state and the country as a whole.

3. In 1947, Grand Canyon National Park experienced one of its worst accidents when a group of TWA pilots crashed into the canyon, killing all 22 people on board. The crash occurred on January 15, and the wreckage can still be seen today.

4. Arizona Senator John McCain died on August 25, 2018, but his impact on the state's history cannot be overstated. McCain was born on January 15, 1936, in Coco Solo, Panama, while his father was serving in the military.

5. On January 15, 2016, Phoenix hosted the NFL's Pro Bowl for the first time since 2015. The game was played at University of Phoenix Stadium, and featured star players from across the league. The Pro Bowl's return to Arizona was seen as a big win for the state's tourism industry.