Well, that is just weird.

If it was a full-scale Wintersday event I'd wonder if they were doing something shiny & new in December, but since it sounds to be only a partial 2 day implementation I expect it's just a novelty.

As big of a Guild Wars fan as I am (and I think it is my most played game of all tiem by some margin), I'm in the unplaying demographic that Wootson mentioned nowadays - I certainly geeked out for the recent Ritualist overhaul, but even that didn't translate into more game time as I've simply seen & done everything (including having my fill of Wintersdays).