"O Canada" was proclaimed Canada's national anthem on July 1, 1980, 100 years after it was first sung on June 24, 1880. The music was composed by Calixa Lavallée, a well-known composer; French lyrics to accompany the music were written by Sir Adolphe-Basile Routhier. The song gained steadily in popularity. Many English versions have appeared over the years. The version on which the official English lyrics are based was written in 1908 by Mr. Justice Robert Stanley Weir. The official English version includes changes recommended in 1968 by a Special Joint Committee of the Senate and House of Commons. The French lyrics remain unaltered. For more information on the National Anthem, including its history, copies of the lyrics and sheet music, visit the Canadian Heritage website.