>>2803506I don't really know the whole system, I'm from a family of heathen atheists/agnostics. There's lighting four candles every few days before Christmas, the obvious Christmas tree (and nativity scene - apparently that's not known everywhere). Religious people go to church more often during the period from what I understand.
>advent calendarsIt's a boxs of chocolates with 25 little "doors", one for each day (25th being the one for Christmas day) with little chocolates inside. You're supposed to open one door every day until Christmas.