The tradition in Sweden and in Finland to plunder the Christmas tree is on Tjugondag Knut or St. Knutís Day on January 13. This is the day when Christmas is 'thrown out.' It is literally the case these days as this is the date when you usually throw out a Christmas tree that is shedding needles badly and seems to have done its part to enhance the Christmas season. For more info on the celebration of Trettondagen, see Trettondedag Jul and Tjugondedag Knut