ADVENT. Latin, Coming. Four Advent Sundays immediately precede Christmas. They are so called because they are designed to prepare us to commemorate the advent, or coming, of Christ in the flesh at Christmas, and also to prepare for His second coming to judge the world. The Ecclesiastical, or Church Year, begins with Advent Sunday. The season of Advent is spoken of in a homily written as far back as the year A.D. 450.