1. On February 15, 1912, Arizona became the 48th state to join the United States. The capital of Arizona, Phoenix, was chosen as the state capital due to its central location within the state.

2. The Great Flood of 1891 also occurred on February 15 in Arizona history. This event caused major damage to the Salt River Valley and Tucson, and resulted in the loss of many homes, buildings, and crops.

3. On February 15, 1877, the Camp Grant Massacre took place in Southern Arizona. A group of Apache men, women, and children were killed by a group of white settlers and Mexican militia in a controversial attack that sparked ongoing tensions between the two groups.

4. The 14th annual Arizona Renaissance Festival also began on February 15 in 1997. This popular event takes place every year in Gold Canyon, Arizona and features jousting, live entertainment, crafts, and food.

5. In 1992, the Phoenix Suns NBA team set a record for most consecutive wins on February 15, with their 18th consecutive victory. The Suns went on to reach the NBA Finals that season, but were ultimately defeated by the Chicago Bulls.