When was Idaho admitted to the Union?

Idaho was admitted to the Union on July 3, 1890. This date is significant in American history as it marks Idaho’s transition from territory to statehood, becoming the 43rd state. The admission process involved Congress passing the Admission Act, and Idaho's statehood was celebrated as part of the expansion of the United States into the western territories.

The other options reflect different dates that are not associated with Idaho's admission. For example, June 30, 1890, and May 1, 1890, are historical dates that do not pertain to Idaho's statehood. July 4, 1891, is after the actual admission date and does not carry relevance to when Idaho became a state. Understanding the correct date helps in appreciating Idaho's history and its role in the broader narrative of U.S. statehood.