The Christmas style is back, for a limited time. It's a selectable style and it's also taken the place of the default theme. I had it as the Main Page theme for a short time too, but I figured some people might actually like that one, so I changed it back.
Rumor has it that we might be seeing some more new buttons to go along with it, but I'll have to consult a mysterious figure about that. As it is though, I think it's pretty spiffy so enjoy 😉