The Union of India is a federal union made up of 28 states and 8 union territories. India achieved independence from British rule on 15 August 1947 and became a republic on 26 January 1950. Many states celebrate a state day to mark its formation, statehood, reorganisation or other associated events while some like Assam and Bengal celebrate it on other specific days. Some of the states and union territories have declared official holidays. State functions, parades, cultural events and award ceremonies are generally organized. Many states celebrate their state day on their formation date or statehood date.