In Sweden we keep decorations up until 20 days after Christmas. It's an old tradition where we have a big party, eat the last bit of the Christmas food - the edible Christmas decoration included (eg. gingerbread cookie decor with hard icing or other candy decorations) and dance Christmas out out the house and throw the tree out in the snow as well.
Personally, I keep my home christmasy for much longer... In fact, I'm still decorating my house. I feel the Christmas holiday went too quickly. It wasn't a long celebration for us, even though we started on Christmas Eve. I think it's because hubby worked so much it didn't feel we celebrated at all, even though we opened Christmas presents two days in a row and had two Christmas dinners, one Swedish and one Australian.
So, there will be more Christmas posts... 'cause Christmas isn't over yet!