The Sippican Choral Society of Marion will usher in the Christmas season with its annual Christmas concerts on Friday, Dec. 4 at Grace Episcopal Church in New Bedford at 8 p.m., and Sunday, Dec. 6 at 4 p.m. in Tabor Academy’s Wickenden Chapel. This year marks the society’s 50th anniversary.

This year, under the direction of its new Music Director Dr. Tianxu Zhou, the chorus will perform Anton Vivaldi’s “Gloria” as its main selection, followed by some of the chorus’s favorite Christmas music over the last 50 years. Selections include “Go Tell It on the Mountain”, “O Holy Night”, “Sleigh Ride”, and as a benediction, John Rutter’s “The Lord Bless You and Keep You”.

The chorus will be joined by the Southcoast Children’s Chorus as its guest under the direction of Leslie Piper. The children will sing several pieces, and join the chorus for three others, including “Hope for Resolution” by Paul Caldwell and Sean Ivory.

The audience will have the chance to sing along with the chorus on several familiar Christmas carols.

The following Monday evening, volunteers from the chorus will also sing selections from the concert at the Sippican Healthcare Center in Marion.

Tickets to the Christmas concert are $15 each and are available at The Bookstall in Marion, Up with Kids at Mattapoisett’s Ropewalk, The Symphony Shop in Dartmouth and Euro in Fairhaven. Chorus members also have tickets for sale. Doors for the Friday concert at Grace Episcopal Church in New Bedford will open at 7:30 p.m. On Sunday at Wickenden Chapel in Marion, doors open at 3:30 p.m. Both venues are handicapped-accessible.