I never celebrated Christmas until meeting my dh. Never missed it, either, as we could enjoy as much we wanted of what was around us, anyway, without any pressure.
But dh is a non-Jewish atheist, and Christmas is his family festival. So we do a secular and relatively kosher Christmas. Presents and a slap-up feast, basically, and add to the decorations left up from Chanuka.
That said, he's making latkes right now, as we didn't manage to make them during Chanuka 😄 There's plenty of chocolate gelt left over, and dreidels don't go off...