HOMETOWN CHRISTMAS Pilgrim Festival Chorus performs favorite carols and seasonal music drawn from its previous winter concerts. The program includes the medieval carol “Nowell Sing We,” Philip Dietterich’s arrangement of “People, Look East,” the tender Polish carol “Infant Holy, Infant Lowly,” John Gardiner’s rambunctious arrangement of “Tomorrow Shall Be My Dancing Day,” carols by Mendelssohn and Vaughan Williams, and the upbeat Gospel tune “Go Were I Send Thee.”