Passage: Following the Montagu–Chelmsford Reforms of 1919, Madras was the first province of British India to implement a system of dyarchy, and thereafter its Governor ruled alongside a prime minister. In the early decades of the 20th century, many significant contributors to the Indian independence movement came from Madras. With the advent of Indian independence on 15 August 1947, the Presidency became the Madras Province. Madras was later admitted as Madras State, a state of the Indian Union at the inauguration of the Republic of India on 26 January 1950, and was reorganised in 1953 & 1956.

Question: When was Indian independance movement?
1947