The state of Madras was officially renamed Tamil Nadu on January 14, 1969. The name change was a reflection of the state's Tamil identity, as "Tamil Nadu" means "The Land of the Tamils." The renaming was part of a broader movement to emphasize the cultural and linguistic heritage of the Tamil people.

The then Chief Minister was C. N. Annadurai.

The chronology of states' bifurcation in India after 1956:

• 1960 - Bombay state split into Maharashtra and Gujarat
• 1963 - Nagaland carved out of Assam
• 1966 - Haryana and Himachal Pradesh carved out of Punjab state
• 1972 - Meghalaya , Manipur and Tripura were formed
• 1975 - Sikkim became part of Indian union
• 1987 - Goa and Arunachal Pradesh became states (earlier these were UTs)
• 2000 - Uttaranchal (out of UP), Jharkhand (out of Bihar) and Chhattisgarh (out of Madhya Pradesh) were formed
• Telangana (out of Andhra Pradesh), when it was eventually created in 2014, became India's 29th state.

The chronology of states' bifurcation in India after 1956:

• 1960 - Bombay state split into Maharashtra and Gujarat
• 1963 - Nagaland carved out of Assam
• 1966 - Haryana and Himachal Pradesh carved out of Punjab state
• 1972 - Meghalaya , Manipur and Tripura were formed
• 1975 - Sikkim became part of Indian union
• 1987 - Goa and Arunachal Pradesh became states (earlier these were UTs)
• 2000 - Uttaranchal (out of UP), Jharkhand (out of Bihar) and Chhattisgarh (out of Madhya Pradesh) were formed
• Telangana (out of Andhra Pradesh), when it was eventually created in 2014, became India's 29th state.

The chronology of states' bifurcation in India after 1956:

• 1960 - Bombay state split into Maharashtra and Gujarat
• 1963 - Nagaland carved out of Assam
• 1966 - Haryana and Himachal Pradesh carved out of Punjab state
• 1972 - Meghalaya , Manipur and Tripura were formed
• 1975 - Sikkim became part of Indian union
• 1987 - Goa and Arunachal Pradesh became states (earlier these were UTs)
• 2000 - Uttaranchal (out of UP), Jharkhand (out of Bihar) and Chhattisgarh (out of Madhya Pradesh) were formed
• Telangana (out of Andhra Pradesh), when it was eventually created in 2014, became India's 29th state.

The Home Ministry has also received demands for creation of Mithilanchal or Mithila state comprising territories in Bihar,

• Since the last four decades, Kodavas (Coorg), the people of Kodagu district in Karnataka, have been demanding a separate state on linguistic, cultural and political grounds.
• Braj Pradesh, comprising Rajasthan’s Bharatpur district, Gwalior district of Madhya Pradesh and two districts in Uttar Pradesh, Aligarh and Agra.
• Saurashtra State was originally named the United State of Kathiawar. It was formed on 15 February 1948, from approximately 200 large and small Princely States of the colonial Baroda, Western India and Gujarat States Agency of the British raj territory under direct colonial rule.

Saurashtra: The movement for separate Saurashtra state was initiated in 1972 by Ratilal Tanna. Lack of better water supply to the region, lack of job opportunities and subsequent youth migration have been cited as major reasons for the demand of statehood. Saurashtra is also linguistically different from the rest of the state.

The Konkani language was added to the Eighth Schedule of the Indian Constitution in 1992 as part of the 71st Amendment Act. The amendment also added Manipuri and Nepali to the list of official languages of India.

____________

The Madhya Pradesh Reorganization Act of 2000 was an Act of the Parliament of India that created the state of Chhattisgarh from Madhya Pradesh. The Act was introduced by the NDA government led by Prime Minister Atal Bihari Vajpayee to fulfill an election promise. It came into effect on November 1, 2000. The Act also established the High Court of Chhattisgarh in Bilaspur and made the High Court of Madhya Pradesh in Jabalpur the successor state's High Court.
The Act also reorganized the states of Uttar Pradesh and Bihar, creating Uttarakhand from Uttar Pradesh and Jharkhand from Bihar.

____________

The Andhra Pradesh Reorganisation Act of 2014, also known as the Telangana Act, is an act of the Indian Parliament that split the state of Andhra Pradesh into two successor states: Telangana and the residuary Andhra Pradesh state. The act was introduced in the Lok Sabha on February 13, 2014 by the Minister for Home Affairs, Mr. Sushil Kumar Shinde.
____________

The Orissa (Alteration of Name) Act of 2011 is an Indian law that changed the name of the state of Orissa to Odisha and the Oriya language to Odia. The act was introduced in response to the people of Orissa's demand to reflect the region's cultural and linguistic identity.
___________
The Pondicherry (Alteration of Name) Act of 2006 was passed by the Parliament of India to change the name of the Union Territory of Pondicherry to Puducherry. The act came into effect on October 1, 2006, and required that all existing laws, documents, and records replace the name "Pondicherry" with "Puducherry".

The Andhra State Act of 1953 was passed by the Indian Parliament in September 1953 and came into effect on October 1, 1953. The act created the state of Andhra Pradesh from the Telugu-speaking districts of Madras State, which is now known as Tamil Nadu. The act also increased the area of Mysore State and decreased the area of Madras State. The new state was India's first linguistic state, and its formation paved the way for the creation of more linguistic states. 

_____________
The Jammu and Kashmir Reorganisation Act, 2019 is an act of the parliament of India containing provisions to reconstitute the Indian-administered state of Jammu and Kashmir into two Indian-administered union territories called Jammu and Kashmir, and Ladakh, and becoming effective on 31 October 2019.
_____________
The States Reorganisation Act, 1956 was a major reform of the boundaries of India's states and territories, organising them along linguistic lines.
_____________
The Bombay Reorganization Act of 1960 was passed by the Parliament of India to reorganize the state of Bombay into two states: Gujarat and Maharashtra. The act was effective on May 1, 1960.
_____________
The State of Arunachal Pradesh Act of 1986 established the state of Arunachal Pradesh, which became the 24th state of the Indian Union. The act was notified on February 20, 1987, and established the state on the territories that were previously part of the Arunachal Pradesh Union Territory. The 55th Amendment to the Constitution of India in 1986 granted statehood to Arunachal Pradesh.

Published in 2013

Assam CM Himanta Biswa Sarma seeks a separate Time Zone for the state: Assam can progress intensively. But why does this northeast need a separate time zone? The reason for the demand is the loss of daylight hours and excess use of electricity.

1. Bihar – 1912 British province and then 1950 Independent India

2. Rajasthan – 1949

3. Gujrat – 1960

4. Nagaland – 1963

5. Himachal – 1971