Everything you need to know about Christmas, and how it has evolved into a global holiday

NEW YORK, Dec 25: Christmas is a Christian holiday that observes the birth of Jesus. But did you know that the earliest followers of Jesus did not annually commemorate his birth? Or that Santa Claus is inspired by the acts of kindness of a fourth-century Christian saint? And have you heard about the modern-day Japanese tradition of eating Kentucky Fried Chicken on Christmas?