Independence Day in Uzbekistan is observed every September 1, celebrating the country's declaration of independence from the Soviet Union on August 31, 1991. The holiday commemorates the establishment of the Republic of Uzbekistan, which became part of the Russian Empire in the 19th century and later the Soviet Union, with the Uzbek Soviet Socialist Republic created in 1924. Celebrations include the adoption of the state flag and a new constitution following independence. Although the country gained de facto independence in August, the official celebrations occur on September 1, marking a significant moment in Uzbekistan's history.