Thanks, everyone, for your responses. You know, it didn't even occur to me that people might be working on Christmas Eve. How silly of me! Christmas Eve is on a Friday after all. Of course some people will have to work!
I'm thinking of having it the day after Christmas instead. The only concern is that we're going out of town the next day, and there will be a lot to get done before we leave.
Hmmm..... I have to think about this a little...