Question: when did o canada become canada's national anthem
Answer: O Canada Sheet music for Canada 's national anthem , in English , French , and Inuktitut National anthem of Canada Also known as French : Ô Canada Lyrics Adolphe - Basile Routhier ( French , 1880 ) , Robert Stanley Weir ( English , 1908 ) Music Calixa Lavallée , 1880 Adopted July 1 , 1980