When Does Advent Begin In 2025 Uk. 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. Advent 2025 start and end dates.

The liturgical calendar of advent focuses on the four sundays leading up to christmas. On the church calendar, advent always starts four sundays before christmas.