Mostly a cappella seasonal music performed by the Columbia Pro Cantare Chamber Singers. 3 p.m. Christ Episcopal Church, 6800 Oakland Mills Road, Columbia. Advance tickets: adults, $15; seniors and students, $13. Tickets at the door: adults, $17; seniors and students, $15; children 15 and younger, $10. 301-854-0107, 410-799-9321, procantare.org