This event will run from 16 December 2013 to 3 January 2014. Users will be able to see their entire hat collection at http://winterbash2013.stackexchange.com. That site will also have a landing page, explaining the rules and other details of the event.
Individual users who don’t want to participate, don’t want to see hats, and/or are generally anti-hat will have an “I hate hats” option available. And just like last time, at the end of the event, all hats will go back into storage.
The only visual change to the Stack Exchange sites themselves will be the presence of the hats and the “I hate hats” button in the footer.
All responses will need to be in by 1 December 2013. Sites that haven’t responded by then will be considered to have opted out from the event.