I don't think Worldbuilding has missed any winter-bash since the site's inception.
Winter Bash is a fun event, that starts every year in the middle of December, usually between Hanukkah and Christmas, and lasts until the end of that year, for about 2 weeks. During this event, users are given "hats" for doing certain actions on the sites (hats are per site, like badges) and they can choose what "hat" to wear via their profile. That hat will be visible on top of their avatar for everyone to see. There is a spirit of competition inspired by having a global leaderboard, and a race to find the secret hats. When the event is over, the "hats" are all gone and can't be accessed anymore.
Do we participate in 2017's Winter Bash? Please vote for only one of yes, no or indifferent, as appropriate, by upvoting the appropriate answer. The final decision will be at the discretion of the moderators, but I promise that we will give due consideration to the community's vote. (I do not, however, promise anything about precisely how much consideration will be due. ;-))
I expect that there will be an "I hate hats" option, as usual, so that even if we do participate, those who don't want to see any hats can easily opt out on an individual basis.