When Does Advent 2025 Begin. The conference notes that the new 2025 liturgical calendar will begin with the first sunday of advent on dec. Advent 2025 begins on sunday, november 30th, starting the celebration season for the birth of jesus christ with the advent season ending on the first mass of christmas(vigil.
Advent liturgical traditions and celebrations; Marking the beginning of the christian liturgical year across many different western churches, and initiating the period of preparation and celebration of the nativity of jesus at christmas, advent.