So, the word online is the first day events for Wintersday has started in GW2. Here's an article to help guide you through some of the current festivities.
The only thing that worries me is if the special area events for Tixx mean a one time thing only at that time or if its an all day event. I'd hate to miss out since I have to work like every single one of those days :-\
UPDATE: According to Arenanet, we will have 24 hours each day to partake in the events in each city Tixx goes to!