In the early years when the kids were young, we would switch out the Christmas dishes the same time we put up the Christmas tree and then put them up the same time we put up the holiday decorations after Christmas/before New Years.
A few years ago, we extended the holidays in a sense as we decided the “put ’em up” date” would be the Martin Luther King weekend in mid-January.
This year, I moved up the “get ’em out” date earlier than ever: the Monday before Thanksgiving! So the spirit of the holidays comes earlier and stays later with passing time. If we live long enough, we’ll have them out from Halloween till Mardi Gras.