We went to a service at the church where we were married on 12/23. They have had such big crowds for the Christmas Eve service that they scheduled one for 12/23 and asked for people to voluntarily switch to that one if at all possible. It actually worked out better for us.
When I was a teen and in college, I worked retail. I worked every time I came home between semesters. Christmas Eve was a given; I always felt really grateful if I got the earlier shift that day.