On what date did Missouri officially become a state?

Missouri officially became a state on August 10, 1821. This date is significant in U.S. history as it marks the moment when Missouri was admitted to the Union as the 24th state. The process of statehood followed several steps, including the drafting of a state constitution and approval by Congress, demonstrating Missouri's transition from a territory to full state status.

The other dates provided in the options are associated with different historical events. July 4, 1776, is celebrated as Independence Day in the United States, marking the adoption of the Declaration of Independence. January 1, 1800, holds no particular significance in relation to Missouri's statehood, while April 30, 1804, is known for the formal transfer of the Louisiana territory from France to the U.S., which included the area that would become Missouri. Understanding Missouri's admission to the Union helps to contextualize its role in the expansion of the United States, particularly during the early 19th century.