1. On March 4, 1912, Arizona became the 48th state to join the United States of America. After years of struggling for statehood, Arizona finally gained its independence from the Territory of Arizona.

2. March 4, 1921, marked the inauguration of Warren G. Harding as the 29th President of the United States. Harding had significant ties to Arizona, as he and his wife owned a home in Tucson and often visited the state.

3. On March 4, 1930, the first nonstop flight between Los Angeles and Phoenix was completed by aviation pioneer Clyde Pangborn. The flight took just over 5 hours and covered a distance of approximately 350 miles.

4. The movie "Raising Arizona," a quirky comedy directed by Joel and Ethan Coen, was released on March 4, 1987. The film, starring Nicolas Cage and Holly Hunter, was filmed on location in Arizona and has since become a cult classic.

5. In recent years, March 4 in Arizona is celebrated as National Grammar Day. This annual celebration was founded by the Society for the Promotion of Good Grammar (SPOGG) and aims to promote proper grammar usage and education.