'when I saw his hand up that arse I knew Santa was on the way' 
What lovely posts - after yours Ophelia I have something in my eye I think.
I loved and still love Christmas but there were an awful lot of Rules when I lived with my parents and siblings which did get in the way a bit.
There was of course the Long Healthy Walk on Christmas Day, this was set in stone though in recent years has got a bit shorter. There was also always Church, though very much in the traditional nonreligious British way so that we expected an extremely short service and complained if it went over 50 minutes.
For a few years there was the No Telly At Christmas rule, my mother used to put the tree in front of the telly. This eventually stopped, and if we were lucky there would be a film that everyone was happy to see (essentially either My Fair Lady or Some Like it Hot or Sound of Music - luckily the BBC were on our side here). Nothing in the morning (but that was normal) and no random telly watching, we had to put a case based on careful study of the Radio Times.
Present timing always had a lot of rules. I had a stocking until I was 12, and thank goodness was allowed to open it when I got up, but other presents waited until after church. Then as we got older, presents got later until in my mid-teens they happened after the Long Healthy Walk at tea-time. TBH by that time I was feeling pretty deflated and it was all a huge anticlimax.
For a grim few years there was the Anti Gluttony and Excessive Western Waste rule imposed by a newly religious member of the family, so that we did have normal Christmas dinner but weren't supposed to eat anything else that day, with the money therefore saved being donated to charity. There were still the remnants of that happening when I left home.
I still do the Walk and do try to spread the presents out a bit, but I now really enjoy other families' traditions. I am also very
when I hear religious mention of 'the real meaning of Christmas' since I'm afraid my family's endless attempts to hold back supposed commercial or vulgar pressures on Christmas in my view just ended up being largely joyless. You don't become a loving and happy family by imposing rules on celebrations for the sake of it.