The Museum of Hoaxes rates the Guardian’s cherished San Seriffe supplement of 1977 at number 2 in its “Top 100 April Fool’s Day Hoaes of All Time”. The BBC’s great Spaghetti Harvest hoax rightly grabs number 1. The Museum notes something I hadn’t noticed: in the Guardian’s subsequent April Fool’s references to San Seriffe, “each time it reappeared the island had changed location. It began in the Indian Ocean, moved to the South China Sea, and ended up in the North Atlantic”. The Taco Liberty Bell gets number 4. The “Biblical value of Pi” gets in at 8; Guinness Mean Time is 23.
(From Museum of Hoaxes)