Yes, eggnog is a traditional Christmas drink. It is a sweet, creamy, and flavorful beverage that often contains milk, eggs, sugar, spices, and often a hint of alcohol. Eggnog is usually served during the holiday season, and it has a rich and festive history that dates back to the 14th century in Europe. In North America, eggnog is traditionally served during the Christmas season, and it is often enjoyed at holiday parties and gatherings.