Normally on Christmas day, the family has a big lunch (roast sort of stuff) together, then unwraps presents, then snacks on leftovers for dinner. (Actually, it's not always on the actual day - sis and her boyfriend work jobs that sometimes mean they aren't available on Christmas day.)
This year, they are available, and will be bringing sis's boyfriend's mum (who I've never met before) - but will be arriving around 4pm. Not sure why such a late start (maybe one has to work the morning shift?) but anyway, mum and I will be going to the grandparents' place for a snacky-lunch, and then after we'll all have a big dinner when sis et al arrive.
It's not really a huge deal with us... Just an excuse to get together, share a meal, and exchange gifts. None of us are religious.
So yeah, that's my "big" plan for Christmas.
NYE, I'll probably be asleep by 9pm after having done nothing that night. The day, however, I really should be editing.
ETA: And as I'm sure Kelly could tell you, real NYE is October 31st.