Link: http://www.museumofhoaxes.com/hoax/Hoaxipedia/San_Serriffe/

...we pause for a moment to salute The Guardian newspaper, which in 1977 unleashed one of the great April Fool's Day hoaxes - the fictional island archipelago of San Serriffe. This spawned many April 1st imitators. I remember buying the University Of San Serriffe t-shirt at the time. The university's (Latin) motto: In Perpetuam Floreat Nihil (nothing ever flourishes here). I also bought a t-shirt featuring the likeness of the island's military dictator, General Pica.