Matt and I decided we'd leave our Christmas tree up for another week or so.
But then I think of my own parents, who keep their (undecorated) Christmas tree set up year-round in my mom's home office. She calls it her "forest tree." (If you knew my mom, you'd just think it's funny, even though it is a little crazy.) This is normal for them.
(And their next-door neighbors had their outdoor Christmas lights up for like six years straight when I was younger.)
How long do you leave your Christmas decorations up? How long after the new year is too long?