NTRODUCTION:The Origin and Purpose of Festivals¿-Ideas suggested by Christmas¿-Pagan and Christian Elements¿-The Names of the Festival¿-Foundation of the Feast of the Nativity¿-Its Relation to the Epiphany¿-December 25 and the Natalis Invicti¿-The Kalends of January¿-Yule and Teutonic Festivals¿-The Church and Pagan Survivals¿-Two Conflicting Types of Festival¿-Their Interaction¿-Plan of the Book.