For us:
Dec 23rd is my nana's birthday (my dad's mum) so during the day or early evening we also viisiit her at home. My parents, and oftne my brother and sister will come over too. And there all the rest of the family popping in and out that day too.
Christmas Eve morning - last minute shopping and preparation
Christmas Eve afternoon - will visit my parents and DH's parents (they live in same town only 40 mins drive away from us). Mainly to collect presents from them, and also to have a quick drink and for them to catch some of DD's magic Before DD both families would meet in pub for drinks. But now we try and be home well in time for DD's bedtime - so we can do the whole stockings, mince pie and sherry routine.
Christmas day - always spent at home, just the three of us. We started this as soon as we mioved in together, when just the two of us. Means no travelling and messing around, and we can both relax and drink. And DD gets to open her presents in leisure and to play with her new stuff. last year we all went to a local restaurant for a Christmas meal - walking distance, which was lovely. Otherwise food is nice and simple to prepare, but quite traditional, just courtesy of M&S
Boxing Day - my parents, brother and sister, DH's parents, brother and SIL all come over to our place in the afternoon. We do a big buffet. Some may stay over (brothers/sisters etc) too - depends on when bank holidays fall. Very relaxed and good fun.
Then rest of the holiday depends on who is off and when. We will generally over the week spend some time and a meal at both sets of parents house.
And New year's Eve may be spent with friends or family - no plans made till last minute since having DD.