I'm not working Christmas Eve (purely because it's a Wednesday and I don't work Wednesday) or Boxing Day (work shut/bank holiday) but OH is working both.
Christmas Eve is my brother's birthday so we'll (me and son) spend half the day doing last minute things for Christmas day (peeling spuds, wrapping last presents etc.) and half the day doing something with my brother.
Christmas day it feels like we've got the world and his dog coming - there'll be 10 of us. Us 3, my parents and brother, OH's mum, step-dad, sister and her partner.
I've not really thought about Boxing Day yet except OH's sister and partner are staying over (and OH's at work) so I'll have to play hostess for at least half the day I imagine.
When I worked in hotels I worked Christmas day one year - it wasn't too bad except by the time 300 Christmas lunches had gone by me I thought I'd never eat turkey again!