Are secret hats limited to Entire Winter bash 2014 of Stack exchange or they will be awarded in all SE sites?
Edit: I mean earning of secret hats
Meta Stack Exchange is a question and answer site for meta-discussion of the Stack Exchange family of Q&A websites. It only takes a minute to sign up.
Sign up to join this communityAre secret hats limited to Entire Winter bash 2014 of Stack exchange or they will be awarded in all SE sites?
Edit: I mean earning of secret hats
All hats, both normal and secret hats, are obtainable on all sites, and once you get it on one site, it will synchronise to all sites that you participate. Of course, if you chose to opt out from the Winter Bash 2014 event, then there will be no hats on the site that you chose to opt out. (PS: Thanks, nicael.)
Quote from the blog post of Winter Bash 2014:
Once you acquire an item, click your avatar to pick a hat that you earned—not just on the current site, but anywhere.
This proves that hats are cross-site.
Another way to prove this? You can just complete the Chameleon secret hat mission (changes your profile picture) and you should see a bunch of notifications saying:
You earned Chameleon on [site which you logged in]!
Remember, if you ticked the box saying "only on this site", then click "wear hat", then you will only wear the hat on that specific site.
This is the blog post of Winter Bash 2014, you can find all the information you need.
Hats can only be awarded on participating sites. If a site doesn't participate in the Winter Bash, you cannot earn a hat there either. Secret or no secret.
Hats earned on one site can be donned anywhere on the network; if you earned a hat on site A, you can wear it on site B, provided site B is participating, of course. This includes the secret hats; the hat I am wearing at the time of this post was earned on Stack Overflow, but you can see I am wearing it here.
All hats can be earned anywhere on the SE network, with the exception of 1 of the secret hats. Eureka is awarded manually only to the first person to explain how to earn one of the 8 secret hats. Most of these were awarded on here on Meta.SE, with the exception of one hat for Logan M who I think must've spoken with a developer in a Moderator-only chat room instead (there is no public record of his revelation that I can find).
The Winterbash Leaderboard has one overall ranking for sites earned anywhere, and per-site rankings where only hats earned on that site are counted.