After Indian Independence on 15 August 1947, the Madras Presidency became the Madras Province. On 26 January 1950,India became republic it was formed as Madras State by the Government of India.
At the time of its formation in 1950, it included the whole of present-day Tamil Nadu, Coastal Andhra, Rayalaseema, the Malabar region of North Kerala and Bellary, South Canara, Kollegal of Karnataka. Coastal Andhra and Rayalaseema were separated to form Andhra State in 1953, while South Canara and Bellary districts were merged with Mysore State, and Malabar District with the State of Travancore-Cochin to form Kerala in 1956.
As a result of the States Reorganisation Act, 1956, the state's boundaries were re-organized following linguistic lines. The Tamil speaking region Kanyakumari was merged to Madras state which was earlier a part of Travancore-Cochin.
In 1967, all the political parties of Madras State spoke in one voice, following a fasting protest by Sankaralinganar (resulting in his death), on their demand to rename the state as Tamil Nadu. A resolution was passed unanimously in the Madras State Legislative Assembly by the government led by the then chief minister C. N. Annadurai seeking to rename the state as Tamil Nadu.
On 18 July 1967, a resolution to change the name of Madras State to Tamil Nadu in English and Tamil languages was introduced by Chief Minister Annadurai, and the resolution was passed unanimously.[4]
In 2019, five decades after the state was renamed, the Government of Tamil Nadu led by the then chief minister of Tamil Nadu Edappadi K Palaniswami, announced that 1 November of every year will be celebrated as Tamil Nadu Day from 2019 to mark the formation of the state.[5][6][7]
In July 2022, Government of Tamil Nadu led by the then chief minister of Tamil Nadu M.K.Stalin, announced that 18 July of every year will be celebrated as Tamil Nadu Day from 2022 to mark the renaming of the state.[8][9][10][11]
