C. N. Annadurai
25 events, 1944 to 2019; 10 marked as turning points.
1944
Justice Party becomes Dravidar Kazhagam at Salem
Meeting at Salem, the Justice Party, now led by Periyar, took the name Dravidar Kazhagam and gave up contesting elections.

1947
Periyar calls Independence Day a day of mourning
Periyar called for 15 August 1947 to be kept as a day of mourning, a stand Annadurai rejected, deepening the rift between them.

India becomes independent; Madras Province
India gained independence and the Madras Presidency became Madras Province of the Dominion of India; Periyar called it a day of mourning.

1949
Dravida Munnetra Kazhagam founded
Breaking away from Periyar's Dravidar Kazhagam, C. N. Annadurai and his associates formed the DMK in Madras.

1953
Rajaji's Modified Scheme of Elementary Education
Rajaji's two-shift school scheme, criticised as Kula Kalvi Thittam (hereditary education), triggered protests and was later dropped.

1957
DMK contests its first election
Won by Kamaraj's Congress, the 1957 Assembly election was the first in which the DMK took part after its founding.

1961
E. V. K. Sampath leaves the DMK and forms the Tamil National Party
E. V. K. Sampath split from the DMK and founded the Tamil National Party with the poet Kannadasan.
1962
Annadurai demands self-determination in the Rajya Sabha
In his Rajya Sabha speeches, C. N. Annadurai stated the DMK case for the right of self-determination for the Dravidian south.

DMK becomes main opposition in 1962 election
Congress under Kamaraj retained power in 1962, while the DMK won 50 seats to become the principal opposition party.

1963
DMK drops demand for a separate Dravida Nadu
After the Sino-Indian War and the anti-secession Sixteenth Amendment, the DMK abandoned its demand for an independent Dravida Nadu.

1965
Student-led protests against Hindi becoming the sole official language turned into statewide riots, with police firing and self-immolations.
1967
Annadurai's rupee-a-measure rice scheme
The first DMK government tried to supply rice at one rupee a measure, an election promise made during an acute rice shortage.

DMK wins the 1967 Assembly election
A DMK-led alliance defeated the Congress, ending Congress rule in Madras State; Kamaraj lost his own seat.

C. N. Annadurai becomes Chief Minister
C. N. Annadurai was sworn in as the first non-Congress Chief Minister of Madras State since independence, heading a DMK government.

1968
Second World Tamil Conference held in Madras
Madras hosted the second International Tamil Research Conference, known as the World Tamil Conference, under the Annadurai government.
Statues of Tamil literary figures erected on the Marina
Statues of Tamil poets and scholars, including Kambar, Bharathiyar and Robert Caldwell, were unveiled on Marina Beach for the World Tamil Conference.

Official Languages (Amendment) Act guarantees bilingualism
Amid fresh protests in Madras State, Parliament amended the 1963 Act to ensure English would continue in use alongside Hindi.
Self-Respect marriages given legal validity
The Hindu Marriage (Tamil Nadu Amendment) Act, 1967 became law, legalising marriages performed without priests or Vedic rituals.

Assembly adopts the two-language policy
The Madras Legislative Assembly scrapped the three-language formula and removed Hindi from the school curriculum, adopting Tamil and English.
1969
Madras State renamed Tamil Nadu
With the Madras State (Alteration of Name) Act, 1968 in force, the state officially took the name Tamil Nadu.

Chief Minister C. N. Annadurai died of cancer; his funeral was recorded as one of the largest ever attended.

1978
Anna University was established in Madras as a technical university, named after former Chief Minister C. N. Annadurai.

1985
Madras zoo moves to Vandalur as Arignar Anna Zoological Park
The Madras Zoo, founded in 1855, moved to a large new site at Vandalur as the Arignar Anna Zoological Park.

2004
New Veeranam water supply project completed
A project to pipe water from Veeranam Lake to Chennai, first conceived in 1967, was completed during a severe water shortage.

2019
Tamil Nadu Day first observed on 1 November
The Palaniswami government began observing 1 November as Tamil Nadu Day; in 2022 the DMK government moved it to 18 July.