Actually, it beings on Sunday, and is the shortest it can be at just 21 days (the longest is when Christmas Day is a Sunday, so Advent starts on 27th November, and it lasts 28 days), but still, most Advent calendars start on December 1st.

This year I bought myself a 'traditional Advent calendar with a 'religious' scene and 'windows' that open to reveal scripture texts.  I am also once again doing a Jesse tree, an Advent book and a Jacquie Lawson Advent Calendar, some Advent Zoom reflections and, for the first time, an Advent jigsaw (24 pieces a day for 24 days).  My Advent will be busy and varied - and I'm looking forward to it!