When was 'Jana Gana Mana' first sung as our national anthem?

Question

This song was writing by Bankim Chandra Chaterjee.

Answer 1

at the calcutta session of the Indian national congress on december 27, 1911.

Answer 2

The poem was composed in December 1911, precisely at the time of the Coronation Durbar of George V, and is a paean in praise of "the overlord of India's destiny". The composition was first sung during a convention of the then loyalist Indian National Congress in Calcutta on Dec. 27, 1911.
Jana Gana Mana was officially adopted by the Constituent Assembly as the Indian national anthem in January 24,1950[1][2]. The musical score of the anthem was also created by Tagore

Answer 3

Jana Gana Mana (Jana Gaṇa Mana, Bengali: জন গণ মন Jôno Gôno Mono— "The Minds of All People") is the national anthem of India. Written in Bengali, it is the first of five stanzas of a poem composed by Nobel laureate Rabindranath Tagore. First performed in 1911, Jana Gana Mana was officially adopted by the Constituent Assembly as the Indian national anthem in January 24,1950[1][2]. The musical score of the anthem was also created by Tagore listen (help·info). A formal rendition of the national anthem takes fifty two seconds. A shortened version consisting only the first and last lines (and taking about 20 seconds to play) is also staged occasionally..