National day in India, celebrated on 15 August
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 UK Parliament, which transferred legislative sovereignty to the Indian Constituent Assembly came into effect. India still retained King George VI as head of state until its transition to full republican constitution. India attained independence following the Independence Movement noted for largely non-violent resistance and civil disobedience.
Independence Day (India) on wikipedia