Advent 2025 Calendar Date. On the church calendar, advent always starts four sundays before christmas. December 1, 2025 • second sunday of advent december 8, 2025 • third sunday of advent:

Advent 2025 begins on sunday, december 1st, starting the celebration season for the birth of jesus christ with the advent season ending on the first mass of christmas (vigil mass) on christmas eve. The first sunday of advent is also the beginning of the new liturgical year when we transition into a new liturgical cycle.