Republic Day is the day when the Republic of India marks and celebrates the date on which the Constitution of India came into effect on 26 January 1950. This replaced the Government of India Act 1935 as the governing document of India, thus turning the nation from a dominion into a republic separate from British Raj.

It is the day when the Constitution of India came into effect in 1950, superseding the previously existing Government of India Act(1935) and turning the country into an independent republic. It marks the transition of India from a British empire to an Independent republic.