On this day in 1950, India officially became a Republic by way of adoption of the Constitution, which replaced the Government of India Act 1935.
Each year, the President of delivers an address to the nation on the eve of Republic Day.
On the day itself, the occasion is marked by a parade in New Delhi.
As India celebrates its 77th Republic Day, take this quiz by ThePrint.
(Quiz compiled by Ankita Thakur)