It replaced the Colonial period's "Government of India Act (1935)" as the governing document.
Though the Constitution came into force on January 26, 1950, it was adopted by the Indian Constituent Assembly on January 26, 1949.
The 26th day of January was chosen as the day for the implementation of the Constitution to coincide it with the day of Purna Swaraj, the declaration of Indian Independence by Congress during Colonial power in 1930.
The Republic Day is a three-day celebration and is concluded with a beating retreat on the third day.
The Beating Retreat ends with a song "Abide by Me", which is said to one of the favourites of 'Bapu".
The celebration of the first Republic Day in 1950 was held at Irwin stadium in Delhi. Indonesian President Sukarno was the chief guest to this first celebration.
The celebrations of Republic Day on Rajpath began in 1955. The first chief guest of the Rajpath parade was the first governor-general of Pakistan, Malik Gulam Mohammed.
France and Britain have been invited five times for Republic Day celebration on Rajpath while the United States is invited just once. Pakistan has been invited twice. No guest was invited to the Republic Day in 1966.
The only two original and handwritten versions of the Constitution are preserved in the Parliament of India in helium-filled cases. One of these is written in Hindi while the other is scripted in English.