I didn't take down our Christmas tree down until 7th January because it's one of the Italian traditions I follow.
In Italy many people celebrate la befana.
In popular folklore Befana visits all the children of Italy on the eve of the Feast of the Epiphany (January 6th) to fill their socks with candy and presents if they are good, or a lump of coal or dark candy if they are bad. In many poorer parts of Italy and in particular rural Sicily, a stick in a stocking was placed instead of coal. Being a good housekeeper, many say she will sweep the floor before she leaves. To some the sweeping meant the sweeping away of the problems of the year. The child's family typically leaves a small glass of wine and a plate with a few morsels of food, often regional or local, for the Befana.
I don't celebrate it in that way but just keep our Christmas tree up to that time because for me it marks the end of the Christmas festivities.