The same question has been asked on [StackOverflow Meta](https://meta.stackexchange.com/questions/36918/always-friday-in-iceland). Here is the answer that was provided there:


> That started with the user [Olafur Waage][1] who lives in Iceland. I
> believe it started with someone asking a Friday type of fun question
> and it started as a comment, then turned into a tag. And then people
> started slapping it on more fun meta questions.
> 
> Friday is kind of the official "[let a few fun questions survive on
> meta][2]" relaxed day. I believe someone asked a fun type of question
> and it was not Friday and someone's defense was it is always Friday in
> Iceland!


  [1]: https://meta.stackoverflow.com/users/22459/olafur-waage
  [2]: https://meta.stackexchange.com/questions/19478/the-many-memes-of-meta/21413#21413