I always told my kids we have to say thank you before gimme gimme.
I tell them now I expect them at my table for Thanksgiving. Do what you want for Christmas, (but do drop in Christmas Day or Christmas Eve) but Thanksgiving is mine.
No one listens though. Oh, we HAVE to go to his family. Tried to celebrate Friday so they could go to inlaws thanksgiving day; We're tired of turkey. this isn't thanksgiving. we have to hit the stores. to add insult, my daughter informed me my house is too small, thanksgiving will be at her house which is much bigger. true, but we will eat off paper plates with plastic spoons and forks. instead of the heirloom china and silver. I feel like I need to move to a nursing home or something. end of rant. oh well.
I won't do Christmas until after Thanksgiving.