The Caribou Choral Society will be presenting its 40th Anniversary Christmas concerts entitled “40 Years of Favorites” on Sunday, Dec. 4, at 3 p.m. at St. Thomas Church in Madawaska; on Friday, Dec. 9, at 7 p.m. at St. Mary’s Church in Presque Isle; and on Saturday, Dec. 10, at 7 p.m. at Holy Rosary Church in Caribou. All are welcome to attend.