Great! That doesn't change my advice though. What do you want to do?
If this year is a weird one because her family is traveling, Oh well. It happens. Not every holiday is going to work out 'fairly' (see for example, this year).
If her family is not available this year for Xmas, go to yours. That seems obvious enough. Do your own thing for NYE. See her family next year.
Decide to work in a July 4 for whichever family 'needs' to see you because you couldn't make Xmas.
Great! That doesn't change my advice though. What do you want to do?
If this year is a weird one because her family is traveling, Oh well. It happens. Not every holiday is going to work out 'fairly' (see for example, this year).
If her family is not available this year for Xmas, go to yours. That seems obvious enough. Do your own thing for NYE. See her family next year.
Decide to work in a July 4 for whichever family 'needs' to see you because you couldn't make Xmas.