Sorry for the late reply.
We usually wait for a bit to take them down. We don't have a set schedule, but the first weekend after the new year seems to be it. This year, though, we took it down a bit early cause the cats were climbing the tree and playing with the ornaments. Also, my sister was coming down with her two kids on the 4th and we needed to make room in the living room for the kids to sleep (all the kids were camping in the living room during their visit, mine included).