Texas Independence Day is observed in the United States on March 2 to commemorate the adoption of the Texas Declaration of Independence in 1836, which proclaimed Texas' independence from Mexico during the Texas Revolution. The day is marked by various events, although state offices remain open with reduced staffing. Texas Independence Day coincides with Texas Flag Day and Sam Houston Day, the latter celebrating the birthday of Samuel Houston, a key figure in the Texas Revolution and the first president of the Republic of Texas. The holiday recognizes Texas's unique history as an independent republic before joining the United States and reflects on the state's cultural heritage.