The one holiday overlooked is Thanksgiving. The one that points to thanking God and yet since there is not commercial value outside of selling a turkey it gets forgotten accept for football games and eating good food.
Thanksgiving is the only holiday I really enjoy because it's not commercialized nearly as much as the others and it's primarily an occasion for family members to gather and visit.
For many years the wife and I hosted big family reunions at Thanksgiving but since I don't cook and her age and health are no longer up to the task (when you cook a meal for 20 or 30 people, it turns into a lot of work), we've stopped having the family get-togethers at our house.