We generally take down the Christmas tree on New Year's Day. It's less about any kind of moral feeling about how long the Christmas decorations should be up and more that that's just the last full day I have off before I go back to work and everyone begins entertaining themselves in the new year by adding items to my to do list.  My favorite time of year is right after I throw out the Christmas tree and vacuum up the pine needles.  Then for the next few weeks, every time I use the vacuum, there's a newfound scent of pine in the air.  They should try to make a product that makes that happen year round.  Oh wait, they did.