The Guild Wars 2 site has a brief note about the start of this year's Wintersday event. The 'traditional Tyrian holiday' is scheduled to kick off on December 13th.
It’s time for long winter nights, snowball fights, and exchanging gifts. Wintersday arrives on December 13! Join your friends in Divinity’s Reach for this traditional Tyrian holiday, and visit Toymaker Tixx in his impressive Infinirarium. ArenaNet developers will be celebrating the release alongside players, so look for them in game and help us spread seasonal cheer!
Source: Guild Wars 2 site
