I blame the yanks for this Xmas commercialism.
Not to go too deeply into it but when I was living there, I saw Father Xmas in his regalia (their Santa Claus) selling water beds on the TV in JULY

"Their" shops are everywhere now in the UK and this over-commercialism has spread so much that it has devalued the festive season
My wife and I put the Xmas tree up on 24th and it will stay up for 7 days only.

My family stopped buying presents for adults years ago.

When our little daughter is about two years old I think the Xmas cheer will come back to our little family, anyway.
It is something I am eagerly awaiting