My husband's family did lutefisk on Christmas Eve. Due to the craziness of his being a Pastor on Christmas Eve, we moved it to New Year's Day. Now that we live where we can't get it, we have to plan ahead and order it, which due to my health issues did not happen this year.
My family typically repeated the turkey dinner for Christmas. We have done that, but this year we may do a ham or roast beef. We shall see.
Growing up, we could open the gifts from my mother's parents on Christmas Eve (usually she made is nightgowns/pajamas) and then the rest on Christmas morning.
With Christmas Day services, we went with opening gifts after Christmas Eve services. Otherwise we had wound up children in church on Christmas Day.
Funny story. We had an exchange student who wanted to do the stereotypical gift opening on Christmas morning, only to to it on Christmas Eve.