The Cantorei of the Church of the Blessed Sacrament perform works by MacMillan, Sixten, and, specifically, John Tavener’s monumental work “Ikon of Light” for choir and string trio. Wine and hors d’oeuvres reception to follow. Details at: https://www.blessed-sacrament.org/light. $30 at the door/$25 pre-purchase, seniors, and students. Children 12 and under are free.