Rammohun born in Radhanagore, Bengal on 14th August.

Rammohun settles down in Calcutta. Starts the Atmiya Sabha, translation of Vedanta published.

Translation and publication of the Kena and Isha Upanishads in Bengali and English. Abridgement of Vedanta in English, Hindusthani and Bengali. Translation of Katha and Mandukya Upanishads in Bengali.

A Bengali tract on Suttee. A tract explaining the meaning of Gayatri. English translation of the tract on Suttee.

Celebrated verbal duel between Subrahmanya Sastri and Rammohun at the house of Behari Lal Chaubey in Barrabazar.

English translation of the second tract on Suttee. The Precepts of Jesus, the Guide to Peace and Happiness published.

Establishment of the Calcutta Unitarian Committee by Rammohun Roy, Dwarkanath Tagore, and William Adam

Establishment of the Vedanta College for the teaching of the monotheistic doctrines of the Upansihads

Establishment of the Brahmo Dharma on 20th August, 6th Bhadra 1234 B.E. at the house of Feranghi Kamal Bose which was rented for the occasion

Lord William Bentinck passes the abolition of Sutte act on 4th December 1829. The orthodox Hindus go up in arms against Rammohun and Raja Radhakanta Deb formed a rival association called Dharma Sabha

Rammohun Roy opens the door of the first theistic church on 23rd January 1830 (11th Magh 1236 B.E.). Leaves for Europe on 19th November.

Rammohun Roy breathes his last on 27th September at Beech House in Stapleton Grove in Bristol

Tattwabodhini Sabha, or truth-teaching society, started by Debendranath Tagore to arrest Trinitarian Christian conversions in Bengal.

Debendranath and 20 of his associates are formally initiated in the Brahmo Samaj by Ramchandra Vidyabagish on December 21, (7th Paush 1765 B.E.). Birth of Brahmo Samaj when Debendranath institutionalizes Rammohun's ideology of Hindu reform. Vedanta accepted as the authentic scriptural source of Hinduism

Akkhoy Kumar Datta convinces Debendranath to give up Vedanta as the "book" of the Hindus.

Renewal of Unitarian influence on Brahmoism when Charles Dall, American Unitarian missionary arrives in Calcutta. The British India Society established with Rev. James Long and Rev. Charles Dall. Dall was the only non-Indian member of the Brahmo Samaj, to remain in Calcutta to his death in 1885

Keshub Chandra Sen, charismatic theistic reformer, joins the Brahmo Samaj as disciple of Debendranath

Tattwabodhini Sabha abolished after Pt. Iswar Chandra Vidyasagar, its famous secularist reformer and secretary, resigns in protest against Keshub. Keshub sets up the Brahmo School where weekly lectures were delivered and these lectures were widely attended.

Keshub begins publishing tracts which were the trumpet call of the new Brahmoism and the first chapter was called,"Young Bengal, this is for you". Establishment of the Sangat Sabha.

Keshub and the younger Brahmos try to convince older Brahmos of the need for practical social reforms and a mission society. Debendranath's eldest daughter Sukumari was married according to the reformed rites of the Brahmo Samaj on 26th July. Keshub starts a fortnightly called The Indian Mirror.

Debendranath elevated Keshub Chandra Sen to the post of Minister or Acharya of the Samaj on 13th April and confers upon him the tite of Brahmanand.

Formal schism between liberal younger Brahmos and conservative older Brahmos leads to creation of the Brahmo Samaj of India under Keshub at a meeting held in the house of the Calcutta College on 11th November.

Brahmo missionaries first propagate the Hindu reformation across the subcontinent, making use of the railway system. Bijoy Krishna Goswami persuades Keshub to use Vaishnavism in the service of Brahmoism

Keshub laid the foundation stone of his new church - the Tabernacle of New Dispensation on 24th January.

Keshub consecrates the newly constructed chapel was on 22nd August

Keshub visits England as a spokesman for the Hindu reformation. Keshub establishes the Indian Reform Association on 29th October, primarily to publish cheap literature for the poor, fight against alcoholism and to educate women.

Marital reform among the Brahmo community finally wins approval of the government with the enactment of Act III, the Brahmo Marriage Act. The new tradition of reformed Hinduism is forcefully articulated before orthodox Hindu leaders of Calcutta by Adi Brahmo Samaj president, Rajnarian Bose, in a lecture entitled "The Superiority of Hinduism."

Liberal faction within Brahmo Samaj of India organizes the Samadarshi party to counter Keshub's growing conservatism. Keshub abandons Unitarian gospel of social reform, turning instead to the intellectual study of all major Eurasian religions. He and his disciples begin a series of elaborate seminars known as "Pilgrimages to the Saints."

Political-minded members of the Samadarshi party found the Indian Association in support of the moderate nationalist ideology of Surendranath Banerjee. The movement leads a decade later to the formation of the Indian National Congress.

Marriage of Keshub's eldest daughter, Suniti, to the Maharaja of Cooch Behar, Prince Nripendra Narayan, in violation of the Brahmo Marriage Act of 1872, becomes exciting cause for a second major schism in Brahmo history. Samadarshi party reconstitutes itself as the Sadharan Brahmo Samaj.

Keshub and his loyal followers inaugurate the Nava Vidhan, or New Dispensation Church, with Keshub as prophet of a universal religion.

Death of Keshub followed by renewed factionalism within the New Dispensation between the Vaishnava-dominated Durbar and the Christian Unitarian group headed by P C Moozomdar

Resignation of Bijoy Krishna Goswami as Missionary, indicative of factional struggle within the Sadharan Samaj between devout Vaishnava theists and the rationalist Vedantists led by Sitanath Tattvabhusan. Differences are reconciled, however, by Sivanath Shastri, Sadharan Brahmo Samaj spiritual leader.

Brahmo philanthropy among Bengal's urban and rural poor considerably extended with the creation of the Das Ashram under the direction of Ramananda Chatterji

P C Moozomdar invited by American Unitarians to help organize the first world Parliament of Religions in Chicago.

Bengali Brahmos start the Society for the Improvement of Backward Classes, which is the earliest pioneering movement in India dedicated to ameliorating the conditions of Hindu untouchables.

Rabindranath Tagore assumes leadership of the Adi Brahmo Samaj, and becomes charismatic hero of younger generation of Brahmos. His action arrests growing tendency of Brahmos to defect to revolutionary nationalism./td>

According to Sivanath Shastri, the peak of Brahmo expansion is reached by this year, when 232 Samajes were reportedly active throughout the subcontinent.

Rabindranath honoured with Nobel Prize in Literature for his work Gitanjali (Song Offerings).

Rabindranath Tagore formally inaugurates Visva Bharati University at Shantineketan as an expression of Brahmo universalism.

Death of Rabindranath on 7th August signifies end of an era and the decline of the Brahmo Samaj per se. But his philosophic program of fusing Hinduism with Brahmo ideas and ideals lives on among the progressive middle-class Hindus of contemporary India.