The annual Concord Country Christmas will be held Dec. 3, 10 a.m. to 3 p.m. at the Concord Mercantile at 17 Franklin Street in Springville.   This year, the Concord Historical Society bakers have cooked quite a stash of treats that will be sold 10 a.m. to noon.  Santa’s Reindeer will be visiting from noon to 3 p.m., and the Jolly Old Elf himself shows up at 1 p.m., and will be there until 2.  The afternoon closes with the Concord Mercantile Musicians at 2 p.m.   Parents, don’t forget—Santa picks up letters in the North Pole Mailbox.  Letters with a self addressed stamped envelope will receive a response from Santa.