@PegHughes
I get what you're saying, and I think you're right, people rarely used to have Christmas decorations/fairy lights up til around 20th December. Indeed, when I was a child, Santa's elves my dad didn't put the tree and the decorations up til the night of Christmas Eve Eve. (23rd December.)
I would go to bed at 8 or 9pm on the 23rd, and wake up on Christmas Eve morning, with everything decorated; crepe paper streamers hanging from the ceiling, balloons pinned up (in threes) in the corner(s) of the ceiling, and a lovely 6ft Christmas tree, 🎄 covered in tinsel and glass baubles, with a star on top. I have goosebumps right now thinking about it, coz it was sooooooooo exciting. 😊 (Then they all mysteriously disappeared when I came home from school, or out from playing with my friends, on the Epiphany... 6th of January.)
We started putting ours up on the first week of December (between the 3rd and 7th depending on where the weekend fell,) when the kids were little, because they found it so exciting. We'd do it when they'd gone to bed, and they'd be SO excited when they saw it all the next day, and would sit under the Christmas tree, looking in wonder and excitement at the lights, and the baubles, and the tinsel glistening with all the fairy lights making it twinkle.
And it's just kind of stuck with us.
I also think people put the lights and decorations up around 1st of December now, because even though it's 'twelve days of Christmas' (25th December to 6th Jan,) as people keep saying; a lot of people go back to work on 27th/28th December these days. (Some are even made/expected to go back Boxing Day!
)
Pre 21st century, most people I knew (including me and DH) would be off work from 2 to 3 days before Christmas, right through to 2 or 3 days after New Years Day. So we'd get a full 10 to 12 days off.
Not many people get a 10 to 12 day break anymore (like from 22nd-23rd December to the first week in January. And also, many Works Christmas parties are between the 5th and 10th of December. So many people do have the spirit of Christmas by the first week of December.