1. In 1876, the first train arrived in Tucson, marking the completion of the Southern Pacific Railroad line from California.

2. On March 7, 1912, Arizona became the 48th state to be admitted to the United States, following New Mexico's admission the day before.

3. In 1962, the Navajo Nation Tribal Council adopted the first Navajo Nation Flag, which incorporates elements of both Navajo culture and the United States.

4. The Phoenix Suns played their first game on March 7, 1968, against the Seattle SuperSonics. The Suns won the game 128-114, marking the beginning of the franchise's successful history in the NBA.

5. On March 7, 2014, the Phoenix Coyotes ice hockey team announced that they would change their name to the Arizona Coyotes the following season, in an effort to represent the entire state, rather than just Phoenix.