On Christmas Day, Dec. 25, 12:15 to 2 p.m., there is a Christmas turkey dinner served in the Dining Room of the Basilica of the National Shrine of the Immaculate Conception, 400 Michigan Ave. NE. This is a walk-in meal. Just show up. Volunteers are needed to fill many different positions. To register as a volunteer, email firstname.lastname@example.org or phone 202-526-8300. nationalshrine.com.