1917 April: Mahatma Gandhi launches the Champaran campaign in Bihar to focus attention on the grievances of indigo planters.
1917 August 20: The Secretary of State for India Montague, declares that the goal of the British Government in India is the introduction of Responsible Government.
1918: Beginning of trade union movement in India.
1918 April: Rowlatt (sedition) Committee submits its report. Rowlatt Bill introduces on February 16, 1919.
1919 April 6: All India hartal over Rowlatt Bills.
1919 December 5: The House of Commons passes the Montague-Chelmsford Reforms or the Government of India Act, 1919. The new reforms under this Act came into operation in 1921.
1920: First meeting of the All India Trade Union Congress.
1920 December: The Indian National Congress adopts the Non-Cooperation Resolution. Started in August 31, 1920.
1927 November 8: The British Prime Minister announces the appointment of the Simon Commission to suggest future constitutional reforms in India. Simon Commission arrives in Bombay on February 3, 198 and all India hartal. Lala Lajpat Rai assaulted by police at Lahore.
1928: Nehru Report recommends principles for the new constitution of India. All party conference considers the Nehru Report, August 28-31, 1928.
1928 November 17: Death of Lala Lajpat Rai.
1929: Sarda Act passed prohibiting marriage of girls below 14 and boys below 18 years of age with effect from 1930.
1929 March 9: All parties Muslim Conference formulates the ‘Fourteen Points’ under the leadership of Jinnah.
1929 April 8: Bhagat Singh and Batakeshwar Dutt drop bombs in the Central Legislative Assembly.
1929 October 31: Lord Iriwin‘s announcement that the goal of British Policy in India was the grant of the Dominion status.
1929 December 31: The Lahore session of the INC adopts the goal of complete independence- Poorna Swarajya for India.
1930 January 1: Jawaharlal Nehru hoists the tricolour of Indian Independence on the banks of the Ravi at Lahore.
1930 March 12: Mahatma Gandhi launches the Civil Disobedience movement with his epic Dandi March (March 12 to April 5). First phase of the Civil Disobedience movement: March 12, 1930 to March 5, 1931.
1931, March 5: Gandhi Irwin pact signed. Civil Disobedience movement suspended.
1931 March 23: Bhagat Singh, Sukh Dev and Rajguru executed.
1931 Sepetember 7: Second Round Table Conference.
1931 December 28 Gandhiji returns from London after the deadlocked in second Round Table Conference. Launches Civil Disobedience Movement. The INC declared illegal.
193 January 4: Gandhiji arrested and imprisoned without trial.
1932 August 16: British Prime Minister Ramsay Mcdonald announces the infamous Communal Award.
1932, September 20: Gandhiji in jail, begins the epic “fast unto death” against the communal award and ends the fast on September 26 after the Poona Pact.
1933 May 9: Gandhiji released from prison as he begins fast for self purification. INC suspends Civil Disobedience movement but authorizes Satyagrah by individuals.
1934: Gandhiji withdraws form active politics and devotes himself to constructive programmes (1934-39).
1946 March 15: British Prime Minster Attlee announces Cabinet Mission to propose new solution to the Indian deadlock; Cabinet Mission arrives in New Delhi on March 14 and issues proposal on May 16.
1946 July 6: Jawaharlal Nehru takes over as Congress president.
1946 August 6: Wavell invites Nehru to form an interim government; Interim government takes office on September 2.
1946 December 9: First session of the Constituent Assembly on India starts. Muslim League boycotts it.
1947 February 20: British Prime Minister Attlee declares that the British government would leave India not later than June 1948.
1947, March 24: Lord Mountbatten, the last British Viceroy and Governor General of India, sworn in March 24.
1947 June 3: Mountbatten plan for the partition of India and the announcement that transfer of power will take place on August 15.