Advent 2025 Begins And Ends. Advent starts on sunday, december 1st, 2025. The exact date varies each year because it depends on which day.
In 2025, advent begins on december 1 and ends on december 24 (christmas eve), as the mass of the lord’s nativity begins. In 2025, advent begins on sunday, december 1st, and ends on tuesday, december 24th.