Tuba Christmas concerts are gatherings of volunteer musicians who bring their own baritones, euphoniums, tubas and sousaphones to play seasonal songs in both outdoor and indoor settings.

Loveland Choral Society — “A Season of Celebration”: 3 p.m. and 7:30 p.m., Rialto Theater Center, 228 E. Fourth St., Loveland. $20-$22, 970-962-2120 ...