March 14, 3/14 in American notation, is the international π-day. Therefore the Stockholm Museum of Science and Technology has a special exhibit on that essential number. I think they deserve some promotion, because that is my favorite museum.
The Dream Forge
by Anders Blixt, SF author and game designer
The Dream Forge 
I Sverige borde vi i stället högtidlighålla 22/7.
Nationella π-dagen — firas på varje stads största cirkulationsplats. 🙂