See this description of `My Dear Watson`:

> ##My Dear Watson
> 
> edit a post

Have a look at [my revision history.][1] I have already edited a post more than 1 hour ago. But still I am not awarded this hat on Meta.

So how much time does it take to award any hat?

  [1]: https://meta.stackoverflow.com/users/187824/hims056?tab=activity&sort=revisions