BR
I thought the weekend before Christmas was usually about right, which generally meant they got a day or two earlier every year as they usually launched at the weekend. Ultimately it got to the point where rather than resetting to get closer to the 20th/21st Dec they just continued so it got earlier and earlier until one year they just jumped to the 1st, possibly when Oneness came in.
I'm hoping there is at least one new BBC2 ident too - think they had a collection of 4 last year. IMO if you intend to run your Christmas idents for a month adding to a set of idents every year is the way to do it - and hopefully one day BBC1 will once again have a branding identity where people actually want the Christmas idents to reflect that rather than be a break from their usual presentation.
I'm hoping there is at least one new BBC2 ident too - think they had a collection of 4 last year. IMO if you intend to run your Christmas idents for a month adding to a set of idents every year is the way to do it - and hopefully one day BBC1 will once again have a branding identity where people actually want the Christmas idents to reflect that rather than be a break from their usual presentation.