This is fantastic. :)
I'm teaching a class on semiotics (the study of signs and meaning) at college at the moment and I might just send my students to this thread.
It's not a hoax...as such. And it's certainly not the release date for Fable. (As Pacifist Pig, a contributor, points out.)
But people are what Daniel Dennett calls 'informavores' - they are hungry for meaning, and will seek it out everywhere. They see the world as a sign, and all things carrying meaning.
Hence the amazing display of inventivenes and fun in this thread!
Now, surely there's so many connections that it can't possibly be true that we've all made it up...
...but it is. (PP again)