The correct answer is January 26, 1930. Poorna SwarajOn January 26, 1930, Indian National Congress celebrated the Poorna Swaraj. It is also known as the 'Declaration of the Independence of India'. The word 'Poorna Swaraj' means the complete self-rule independent of the British Empire. It was promoted by the Indian National Congress (INC) to resolve the Congress and Indian nationalists to fight for Purna Swaraj. Additional InformationRepublic dayJawaharlal Nehru hoisted the Indian flag on 31 December 1929 on the banks of river Ravi. Congress informed the people to observe 26 January as Independence Day. From then on, Congress observed 26 January as the Independence Day of India. But on 15 August 1947, the British transferred power to India, and hence it became the official Independence Day. The new Constitution of India was approved by the Constituent Assembly took effect on 26 January 1950. Hence, 26 January is now celebrated as 'Republic Day' of India.