After 2 Weeks, Take It Down
When your home is on the market during the holidays, the general rule of thumb for taking decorations down is within two weeks from the holiday or event.
I once showed a home around Valentine’s Day and the sellers still had the Christmas tree up! My clients were a completely thrown by it. The buyers didn’t remember the family room, just the tree in it.
Holiday and event decorations have a limited time and place. (This includes the outdoor lights too!)