My family is a mishmash (one Norwegian parent, one Dane, grew up between UK and Germany). DH is British but grew up in the ME. DD is just confused as she was born in Finland, but has been raised in the UK so far 😂 We mix things up a bit depending on guests, where we are etc.
Some of it depends where we are- parents were in Norway until recently, but have moved back to Denmark.
Christmas ALWAYS starts on J day, when the xmas beers land (first Friday in November) and my parents will send us a case of Tuborg Julebryg as soon as it is released if we're not due to visit.
On 23rd we have Lille Julaften and decorate the tree and clean the house. We also hide all of the brooms. LOTS of baking. Often make an xmas ham and non-alcoholic Glögi, and try to go to a sauna on 23 or 24th as a nod to the years we were in Finland.
We tend to have a very Scandinavian influenced Xmas eve - roast pork, duck or pinnekjøtt, maybe. Ris á la mande for dessert, always (if we don't have it on the 24th, we go Norwegian and have risengrynsgrøt on the 23rd). A few small gifts from the julnissen. Lots of Aqavit, and, for those who can brave it, Gammel Dansk.
Put out some stuff for Santa. Always LOTS of singing and dancing, and we tend to invite friends who celebrate more on xmas day to join us.
A very British xmas lunch- goose etc. Presents in the morning. I hate xmas pudding, so we usually end up with æbleskriver for dessert.
Boxing day we tend to have a much lighter mezze meal after the richness of the previous days.
We nod to Germany for NY, with doughnuts (one is normally filled with mustard for fun...With a gift for the person who gets that one!)