Anyone who grew up in a Christian household knows two truths ... And two, no holiday season is complete without an Advent calendar. A religious custom that stems from 19th-century Lutherans ...

such as the secular use of a chocolate advent calendar. There are different readings on each of the four Sundays leading up to Christmas Day, with each Sunday having a different theme and focus.

Advent is four weeks long and marks the beginning of the Christian year. The first Sunday of Advent is always four Sundays before Christmas, which means it could be as early as 27 November.