How Many Days Are On An Advent Calendar. This year, advent will begin on sunday, december 3rd, and end on sunday, december 24th. The first calendar that's close to what we use today, was made in 1851 and was made from wood.
In 2020, that day is november 29. The more precise answer to the question posed above is that there are always four sundays of advent, but that the season of advent can be between three.