Holy Trinity Church of Cambridge, MA, and the Erevan Choral Society and Orchestra will present a “Christmas Holiday Concert” on Sunday, Dec. 10, at 7 p.m. in the church sanctuary (145 Brattle St., Cambridge). Traditional Armenian and Western seasonal music; performances by the Arlington High School Madrigal Singers and the Vocal Quartet from the Bostonians. (To read more, click here.) Open to the public, admission is free. For information, contact the church office at (617) 354.0632, e-mail office@htaac.org, or click on the link log onto the church website.