Christmas Day, which is the most festive(欢乐的) time in the United States, falls on Decemeber 25th on which Christian people believe Jesus Christ was born, although no one can tell the exact(确切的) date of his birth. This is the biggest and best-loved holiday in the United States. As for the Christian dinner, Americans traditionally have yurkey(火鸡) or ham(火腿), sweet potatoes(红薯), vegetables, and cranberry sauce(酸果蔓酱).