1. In 1883, the first-ever store in Flagstaff, Arizona was opened by John W. Weatherford on April 25. This store was a significant development for the small town of Flagstaff, as it allowed residents to purchase goods and supplies without having to travel long distances.

2. On April 25, 1908, the Arizona State Teachers College in Tempe (now known as Arizona State University) was established. This institution was founded with the aim of providing education to the people of Arizona, and has since grown to become one of the largest universities in the United States.

3. In 1915, Arizona Governor George W.P. Hunt signed a bill on April 25 that designated the saguaro cactus blossom as the state flower. The saguaro cactus is widespread in Arizona, and its large white blooms are a beautiful sight in the desert landscape.

4. On April 25, 1930, the Hoover Dam was officially dedicated by President Herbert Hoover. The dam, located on the border of Arizona and Nevada, plays a critical role in providing electricity and water to millions of people in the southwestern United States.

5. In 1986, a major fire broke out at the Pigeon Coop Mine in Miami, Arizona on April 25. This fire was one of the largest in Arizona's history, and took several days to fully extinguish. Despite the extensive damage caused by the fire, no one was injured.