I haven't decided what I'll wear on Christmas yet, but it will be a variation of what you're looking at right now. My 'favorite outfit' recipe is pretty simple. I just pair a favorite pair of pants with a comfortable sweater, throw on some neutral shoes, and jazz it up with a necklace. This is what I wore last year. If you can't tell, I have a passion for sweaters. While cardigans are amazing for work,, I love a good pullover that you can throw on quickly.
Here are some more pullover sweater favorites, which I think would be perfect for, not only Christmas day, but the rest of winter: