Obviously I didn't think this through well enough! Since we go to California for Christmas, we celebrate with my parents a little later. Since my birthday is in early January (all right, it's Friday), this works out perfectly (except for the whole I'm-sad-to-not-see-my-family-on-Christmas-Day thing).
So they get here Friday. And sometime after that I'll reveal exactly what eleven represents in my own personal holiday countdown (countup?).