I have always been very grateful that I don’t have this situation. The closest I come is multiple holiday parties during December.
My parents for several years came to my house for Thanksgiving, and when they did that meant my husband and I weren’t going to his parents. It was one or the other or sometimes neither and just stay home or some years Thanksgiving near home with friends.
On the rare occasion that my parents were in town for Christmas and I was living near my inlaws, we all went to my inlaws for Christmas.
My parents are Jewish and my husband’s parents are Catholic, so I don’t need to deal with celebrating Christmas in two places.
There were years we had Christmas a week early, because my husband’s niece and nephew would fly to Italy for Christmas to be with their dad’s side of the family. That’s how we dealt with them juggling Christmas with both sides of the family.