When Does Advent Start 2024 Catholic. In 2024, advent begins on december 1 and ends on december 24 (christmas eve), as the mass of the lord’s nativity begins. The sunday lectionary is a three year cyclical lectionary.

Find the important dates during this celebration in this and future years. Advent calendars that fully capture the season of advent begin with the first sunday in advent and span the entire season until christmas eve.