Festival of Trees Family Day: Animals Up Close, 11 a.m.; cookie decorating, noon; Blafield Children's Chorus; 1:30 p.m. Holiday Flash Mob concerts Saturdays and Sundays in December, string quartets and carolers with Berkshire Music School. ‘Festival of Trees' -- 200 trees throughout the galleries. Inspired by the celebration of the Museum's 110th anniversary year, 39 South St., Pittsfield, (413) 443-7171, www.berkshiremuseum.org
Ken Bonefield presents Winternight Concert on the fingerstyle, acoustic guitar, 2 p.m. 1 Wendell Ave., Pittsfield. Sponsored by the Friends of the Berkshire Athenaeum. Free. (413) 499 9480
Stockbridge Festival Chorus
Annual holiday concert, 5 p.m.: 60-voice choir under the direction of Tracy Wilson will sing several choruses and chorales from J.S.Bach's Christmas Oratorio, with John Demler, bass soloist, and Allan Dean, trumpet. Other anthems and carols of the season include works by Warlock, Mathias, Gardner, Biebl, Darke and Hogan. A reception will follow. First Congregational Church of Stockbridge, 4 Main St., Stockbridge. (413) 298-3137
Cantilena Chamber Choir
‘Christmas at Trinity on Sunday,' 3 p.m. ‘Quartre motets pour le temps de Noel' by Francis Poulenc and music for Christmas by Russian masters Rachmaninov and Titov. Celebration of Benjamin Britten's 100th Birthday: ‘Hymn to the Virgin' and his rarely heard ‘Chorale on an Old French Carol.' John Rutter settings of French carols including ‘Noel Nouvolet' and ‘Il est Ne le Divine enfant.' Trinity Church, 88 Walker St., Lenox. (518) 791-0185, www.cantilenachoir.org.
Holiday music under the direction of Jim Morrison, 7 p.m. 25 Park Place, First Congregational Church of Lee. Free. www.ucc-lee.org or (413) 243-1033.
A Christmas Vocal Celebration
Judy Gray soprano and Jack Brown baritone with Lee Dixon pianist, 4 p.m. Red Lion Inn parlor, Main Street Stockbridge.
Holiday Flash Mob concerts Saturdays and Sundays in December, string quartets and carolers with Berkshire Music School. ‘Festival of Trees' Inspired by the celebration of the Museum's 110th anniversary. 39 South St., Pittsfield, (413) 443-7171, www.berkshiremuseum.org
Eagles Brass Ensemble
Holiday concert, 1 p.m. Berkshire Mall, Lanesborough.
Lenox Holiday Contradance
Join in the dance: Lenox Holiday Contradance and potluck. Early session 5 to 7 p.m., Community potluck 7 to 8 p.m. (bring dish to share, plate/utensils), Evening dance to 11:30 p.m. Calling by Nils Fredland, Music by Arigana Highway: Alden Robinson fiddle, Stuart Kenney bass, Mary Cay Brass piano, Matthew Kenney percussion. Lenox Community Center, 65 Walker St., (413) 528-4007, www.lenoxcontradance.org
Annual Messiah Sing-In
Berkshire Lyric with orchestra and soloists, 2 p.m. You are the chorus, scores available at the door. Jack Brown, director. www.BerkshireLyricInfo.org.
John Pizzarelli and Jessica Molaskey with special guest Bucky Pizzarelli, 8 p.m. Rich, original interpretations of songs from the Great American Songbook mixed with contemporary classics. 14 Castle st. Great Barrington, (413) 528-0100, www.mahaiwe.org
Bach at New Year's
The Six Brandenburg Concerti in reverse order with the Berkshire Bach Ensemble, 6 p.m. with strings, oboes, flutes, bassoon, harpsichord, horns, trumpet and timpani. Mahaiwe Performing Arts Center, 14 Castle St., Great Barrington.