1. Arizona became a state: On August 6, 1912, Arizona officially became the 48th state in the United States of America. The state motto, "Ditat Deus" ('God enriches'), was adopted on the same day.

2. First Native American elected to Congress: Arizona made history on August 6, 1952, when it became the first state in the US to elect a Native American to the US Congress. Democrat George Henry, a member of the White Mountain Apache tribe, won the primary and the general election to represent Arizona's second district in Washington DC.

3. Miranda v. Arizona: On August 6, 1965, the United States Supreme Court issued its landmark decision in Miranda v. Arizona, which established the constitutional requirement that law enforcement officers must inform criminal suspects of their rights before questioning them.

4. Navajo Code Talkers Day: On August 6, 1982, President Ronald Reagan signed a proclamation designating August 14 as National Navajo Code Talkers Day to honor the contributions of the Navajo soldiers who helped the Allied Forces win World War II by using their native language to communicate coded messages.

5. Petrified Forest National Park Established: On August 6, 1962, Petrified Forest National Park was established in Arizona, encompassing 146 square miles of ancient trees that have been preserved as colorful mineralized fossils over millions of years. The park attracts over half a million visitors annually who come to witness the unique geological formations and petrified wood specimens.