My mother had been 'in service' (for a top Harley Street surgeon). So, when I was a child, everything had to be done the way that it had been 'in the big house' (even though we lived on a council estate). That meant that the Christmas tree and decorations were put up after tea on Christmas Eve, and taken down on 12th night. My mother was seethjng with anger if she saw that anyone else had put up their Christmas decorations before then. ("It's disgraceful", she'd say, "and so common. There ought to be a law against it!").
So I don't exactly rush to put my decorations up. (I've started my Christmas shopping, including all of the Christmas cards which needed to be posted to the UK and abroad, at 3.30pm on Christmas Eve before now!). Last year I wrapped a couple of strands of tinsel around my computer monitor, and put my Christmas cards out on display, on New Year's Eve!