1. In 1949, the Grand Canyon National Park was officially designated as a "World Heritage Site" by the United Nations Educational, Scientific and Cultural Organization (UNESCO). This designation recognizes the park's outstanding natural and cultural significance.

2. In 1973, the Arizona Supreme Court ruled in the case of Roe v. Wade that the state's restrictions on abortion were unconstitutional. This decision affirmed the right of women to make their own reproductive choices, and set an important precedent for other states to follow.

3. On April 7, 1982, Governor Bruce Babbitt signed legislation that made Arizona the first state in the nation to require the use of seat belts in automobiles. This law has saved countless lives and helped to reduce the number of serious injuries in car accidents.

4. In 1999, Arizona native Randy Johnson became just the 12th pitcher in MLB history to record 3,000 strikeouts. Johnson went on to have a Hall of Fame career, winning five Cy Young awards and helping to lead the Arizona Diamondbacks to a World Series championship in 2001.

5. On April 7, 2005, the Cardinals Stadium (now State Farm Stadium) officially opened in Glendale, Arizona. The stadium cost $455 million to build, and has served as the home of the Arizona Cardinals since its opening. It has also hosted numerous other events, including the Super Bowl, college football bowl games, and major concerts.