J. Reilly Lewis leads the Washington National Cathedral Choral Society, along with the Maret School Concert Choir and the Washington Symphonic Brass, in The Joy of Christmas concert, a perennial holiday favorite, including sing-along carols and an advent wreath processional. Saturday, Dec. 11, at noon and 4 p.m., and Sunday, Dec. 13, at 4 p.m. Washington National Cathedral, Massachusetts and Wisconsin Avenues NW. Tickets are $25 to $85. Also Monday, Dec. 20, at 8 p.m. at the Music Center at Strathmore, 5301 Tuckerman Lane, North Bethesda. Tickets are $29 to $65. Call 202-537-5527 or visit cathedralchoralsociety.org.