The poem became a song in New York on July 8th, 1995 — fifty years later. It is the longest song of all Sri Chinmoy's musical compositions.
Sri Chinmoy began translating this Bengali song into English on June 9th, 1996. He completed the translation on August 4th so that it might be released on August 15th.From:Sri Chinmoy,August 15th, 1945, Manifestation Glow, 1996
Sourced from https://srichinmoylibrary.com/a15