I used to leave everything in place when the kids were young until after "Greek Christmas" which is today, the 7th. My in-laws always celebrated that day even though my father-in-law was Ukrainian, so I thought I would keep it going even though we aren't Greek.
Now that everyone is in their 40s, I don't decorate anymore. There's no fun in it. We do have lights outside under the eaves that are left up all year long and are only turned on Christmas Eve and Christmas day.