Christmas isn't about 'December 25th'. It's about the whole spirit of the season, goodwill towards men and all that blah blah. It doesn't matter what the date is that you have Christmas, it's all about enjoying the time you have together, when you have it. Enjoy the whole Christmas season, it's about more than just Christmas Day.
Honestly, the worst thing about working Christmas is trying to find somewhere to eat. Seriously, most restaurants are closed, and you would NOT BELIEVE how hard it is to find food on Christmas.
As for me, I just head for the farm with the kids for Christmas day. We look at Bill's schedule and figure out when we're going to have Christmas 'just our family', and when we'll get together with his family, and I go to the farm. Never been an issue. I think he has a harder time being away on Christmas. I couldn't care less that he's not here on Christmas day. It's just a date, Christmas is what you make it, no matter if you open presents on the 21st, the 25th, or even save it for New Years Eve.