This document summarizes several Christmas and New Year's customs and traditions in Greece. It describes how Santa Claus, known as Ai-Vasilis in Greek, distributes presents to children. It also discusses the traditions of singing Christmas carols called "kalanta," cutting the traditional New Year's pie called "vasilopita" which has a coin baked inside, the "podariko" good luck omen, and beliefs about mischievous goblin-like creatures called "kalikantzari." The document provides details on the origins and rituals associated with these cultural celebrations in Greece around Christmas and New Year's time.