Some users in many sites wear hats. But it seems in some other sites like Math.SE there to be no hat. So I'm curious about why.

  • 1
    They probably did not want any math hatter jokes. Jan 3, 2013 at 13:53

2 Answers 2


Hats are not compulsory.

Some sites didn't sign up to have hats.

Even if a site did sign up you can opt out.


Some sites opted out of the Winterbash, and noone earned hats on such sites.

You'll have to ask the moderators of Math.SE themselves for their reasoning.


You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .