1. On January 28, 1935, a powerful earthquake struck the city of Globe, Arizona, causing significant damage to buildings and homes in the area. The quake measured 6.0 on the Richter scale and resulted in two deaths and numerous injuries.

2. In 1986, Arizona became the first state in the country to establish a Martin Luther King Jr. Day as a state holiday. The bill officially recognized the life and legacy of Dr. King and his contributions to the civil rights movement.

3. On January 28, 1864, the first official newspaper in Arizona Territory was published in Tucson. The Daily Arizonian provided news and information to the rapidly growing population of the area and played a significant role in shaping public opinion.

4. In 1971, the Grand Canyon National Park was designated as a UNESCO World Heritage site. This recognition highlighted the natural beauty and importance of the park, which attracts millions of visitors each year.

5. On this day in 1996, the largest mass shooting in Arizona history occurred at a Frys Food and Drug store in Mesa. The shooting resulted in six deaths and several injuries before the shooter took his own life. The tragic incident prompted renewed discussions about gun control laws and public safety measures.