For a very special (and free!) Christmas Day concert, head to the atrium of Stanford University Hospital at 12:30 p.m. There, you'll find musicians Barbary Grant and Don Gustafson playing songs from around the world to celebrate Christmas, including a number of sing-along tunes.
The concert is free and open to the public. For more information, go to stanfordhealthcare.org or call 650-725-2892.