SAS Professionals advent calendar at this time of year. However, this year it seems to have stalled. Clicking the #1 today tells me that I need to wait for the correct date.
I'll post an update as soon as I have more information.
On the plus side, I'm pleased to see that Smooth Radio Christmas has recommenced broadcasting (on the internet, but not DAB this year). With the demise of Smooth Radio 70s in October I was afraid that the Christmas station might meet the same fate. Fortunately not, but I'm sad I can't listen to it in the car on DAB - I've found no replacement either.
If the music of Smooth is not to your taste, consult a list of Christmas radio stations. There's a good range. My kids favourite is North Pole Radio.