We do some things that "everyone" does.
We don't do lots of things that "everyone" does.
And we do quite a few things that "oh nobody does that"!
We do what we enjoy doing, what is meaningful to our family, suits our circumstances, and is within what we can afford (both in terms of money and of time and effort). Some years, that will be different to other years.
Yes there are decorations, nice food, presents, religious observance, music and some outings. But there is also a lot of slowing down and making time for family and each other.
Lots of things get reused over and over (and over) again - including the CEH and much of its contents, the advent calendar, my Christmas jumper, and the various decorations etc.
Some things are new - we usually buy a new decoration on our holidays most years, and it is nice to remember various adventures as we decorate the tree annually. I usually have some fresh flowers, whether I have managed to arrange them before 25th, or am sitting to do that on the afternoon of 26th in between visitors - but it's something I enjoy doing when I have that time.
Some things are traditional full stop. Christmas day mass, roast turkey dinner, choral music, the youngest lighting the Christmas candle.
Some things are traditional for us. Working together to prep the Christmas dinner on Christmas Eve, Christmas Eve "platter" dinner, reflecting on the year just ending (the bad as well as the good) and those no longer with us when doing the candle, the Christmas Eve hamper after lighting the candle, various visits to family and extended family.
And some things are tried and not repeated - Santa steam train was great when DD was small and we all really enjoyed it (we went 3 times over 5 years), but we don't visit Santa anymore. Panto was ok, but we prefer a family trip to the cinema (if there's a good movie) the weekend before Christmas. I love choral music but DH and DD are not such big fans so only came once and I go at lunchtimes now. We had pheasant one year, which was ok but we prefer turkey. As all my DSiblings got into adulthood, we changed to a Kris Kindle system and only buying 1 Secret Santa present (drawn from a hat in advance).
Also, quite apart from family circumstances changing as DCs grow and older family members get married, have their own DCs, get ill or die, ….etc, other things happen like budgets change with other circumstances (upward and downward), availability of time to do things changes (school events take hours out of December in primary school, but keeping older students calm for exams takes even more hours out of December!!) and people's own preferences can change for all sorts of reasons and in all sorts of ways. Work might be manic one year so you only want to do the minimum and order everything online, but another year you find it really de-stressing to work on crafts and do a "Kirstie Allsopp" type Christmas.
And nobody should feel like they "MUST" do it the way that "EVERYONE" does - because no one really does! The magazines, the ads, the social media posts - they are all designed to make you feel guilty, to have it perfect, to spend a lot of money and use a lot of energy.
When in fact you just need to think about what suits YOU and YOUR FAMILY circumstances, and how that might be different this year to previous years that you might need to take into account.