As we all gather to celebrate in whatever way seems appropriate, may your day be joyful and full of kindness.
Christmas is a gift for writers because of the massive number of observable situations which we can draw on for our art. Good, bad, or just different moments are all fuel for character researrch.
Christmas is a great opportunity to observe people interacting. For a writer, this is the perfect time to take some mental notes that might feed into your own characters.
Generally, tense family moments are a total misery but, should you be witness to one, think of it as character research.
I hope, however, that your day is peaceful, happy, and refreshing. Also, full of great research moments too.