Independence Day is annually celebrated on 15 August, as a national holiday in India commemorating the nation's independence from the United Kingdom on 15 August 1947, the day when the provisions of the Indian Independence Act 1947 , as passed by the United Kingdom Parliament , which transferred legislative sovereignty to the Indian Constituent Assembly came into effect. India retained King George VI as head of state until its transition to a full republic and the Constitution of India 1950 replaced the dominion prefix, Dominion of India with the enactment of the sovereign law Constitution of India . India attained independence following the Independence Movement noted for largely non-violent resistance and civil disobedience . Independence Day of India The National Flag of India hoisted at the Red Fort in Delhi; hoisted flags are a common sight on Independence Day. Also called स्वतंत्रता दिवस Observed by India Type National Sig