Oregon Statehood Day is observed in the United States on February 14, celebrating Oregon's admission into the Union as the 33rd state in 1859. Although it is not an official holiday, the day has been marked by various events, activities, and cultural programs throughout the state. The history of Oregon includes its early inhabitants, such as the Bannock, Chinook, and Nez Perce tribes, and significant exploration by European figures like Juan José Pérez Hernández and British explorer James Cook. The Oregon Territory was established following the Oregon Treaty in 1846, which resolved territorial disputes between the United States and Great Britain. The Oregon Constitution was approved in 1857, paving the way for statehood. Celebrations often reflect on this rich history and the diverse cultural heritage of the region.