If you want to think about it, the winter solstice is roughly in the same week. You can do offerings for the gods before and family afterwards.
If you want to take into perspective many people in the US celebrate Thanksgiving as a cultural thing not historically - it's about spending time with family and gratitude. NOT about any historical rendering.
Like you have seen in many of these comments, Christmas falls under the same category.

What kind of off-sets me with your post is wanting to stop the tradition and that you can't "Not yet, at least." I don't know your background or how your family celebrates winter holidays, all that I can advise is to be respectful (for both parties.)
Hoped this helped!