In Serbia, when you see someone dragging a Yule Log homeward, you greet it with respect and say (I'm translating into Pagan here): Good morning Yule.

Since the Yule Log and the Yule Tree are essentially analogous, as the veritable heart (one could well say, the embodiment) of the festival, this strikes me as fitting etiquette for the latter as well.

These days, when I see a car bearing a tree homeward, I tip my hat and greet it as it deserves.

Good morning Yule.