Usually the second weekend before Christmas so mid-December.
People had outside decorations up in my area before Halloween, I kid you not lol.
I think when it starts too early it makes Christmas time seem less special. It's not too bad once we're into December, but I'm afraid the shops get my back up by putting out the advent calendars and boxes of Christmas chocs when the kids go back to school in September [emoji33] so I try and stave it off for as long as possible [emoji5]️
I'll be honest, I get sick of the sight of the decs after they've been up a couple of weeks and can't wait to rip em down and get cleaning in January (and if anyone knows me, that's not because I like cleaning [emoji2])