ad·vent [ad-vent] noun
1. a coming into place, view, or being; arrival: the advent of the holiday season.
2.( usually initial capital letter ) the coming of Christ into the world.
3.( initial capital letter ) the period beginning four Sundays before Christmas, observed in commemoration of the coming of Christ into the world.
And since Christmas is celebrating the birth of Jesus Christ, it makes sense to me that an Advent Calendar should have some meaning to it.
See my complete post and DIY instructions over here at Austin Moms Blog!