In what year did Arizona become an official U.S. state?

Arizona became an official U.S. state on February 14, 1912. This date is significant because it marks Arizona's transition from a U.S. territory to statehood, allowing it to participate fully in the federal government and gain representation in Congress. The process leading up to statehood involved several steps, including the drafting of a state constitution and approval from Congress. The choice of 1912 is particularly important in the context of the state's history, as it reflects the broader movement of western states seeking admission to the Union during that era. The other years listed do not coincide with Arizona's admission and do not reflect significant milestones in its journey toward statehood.