San Serriffe is a fictional island nation created for April Fools' Day, 1977, by Britain's Guardian newspaper. It was featured in a seven-page hoax supplement, published in the style of contemporary reviews of foreign countries, commemorating the tenth anniversary of the island's independence, complete with themed advertisements from major companies. The supplement provided an elaborate description of the nation as a tourist destination and developing economy, but most of its place names and characters were puns and plays on words relating to printing (such as "sans-serif" and names of common fonts). The original idea was to place the island in the Atlantic Ocean near Tenerife, but because of the ground collision of two Boeing 747s there a few days before publication it was moved to the Indian Ocean, near the Seychelles Islands.
San Serriffe was one of the most famous and successful hoaxes of recent decades; it has become part of the common cultural heritage of literary humour, and a secondary body of literature has been derived from it. The nation was reused for similar hoaxes in 1978, 1980 and 1999. In April 2009 the geography, history and culture of San Serriffe featured heavily in the paper's cryptic crossword.
The idea for the hoax came from the Guardian′s Special Reports Manager Philip Davies. In a 2007 interview he said "The Financial Times was always doing special reports on little countries I'd never heard of. I was thinking about April Fool's Day 1977 and I thought, why don't we just make a country up?" Special Reports editor Stuart St Clair Legge suggested the name San Serriffe. Geoffrey Taylor designed the semicolon-shaped map of the island, based on a shrunken version of New Zealand.
Initially, the supplement featuring the fictitious archipelago was to be a single page. However, the newspaper realized that a larger, more in-depth review would generate greater revenue by running themed advertising alongside the text. These included a request for submissions to a photography competition sponsored by Kodak: "If you've got a photograph of San Serriffe, Kodak would like to see it."
Because this terminology had not yet spread through widespread use of desktop publishing and word processing software, these jokes were easily missed by the general public, and many readers were fooled. Despite this, many others recognised the joke and became part of it. The Guardian received hundreds of letters from readers describing memorable holidays to the islands. It also received a letter from the "San Serriffe Liberation Front" critical of the pro-government slant to the supplement.
A large body of secondary work about San Serriffe has been written since 1977. A Friends of San Serriffe club was established, with its "life president" writing annual April Fools' Day letters to the paper. Bird & Bull Press published several books about esoteric subjects relating to the country, including Booksellers of San Serriffe, First Fine Silver Coinage of the Republic of San Serriffe and The Most Inferior Execution Known Since the Dawn of the Art of Marbling Collected by the Author During a Five Year Expedition to the Republic of San Serriffe.
- Martin Wainwright (2007). The Guardian Book of April Fool's Day. Aurum. p. 68. ISBN 184513155X.
- "Visit San Serriffe". The Guardian. 1 April 1978.
- Bachaus, Theodore (pseudonym of Henry Morris) (1978). The World's Worst Marbled Papers: Being a Collection of Ten contemporary San Serriffean Marbled Papers. Port Clarendon, San Serriffe: San Serriffe Publishing Co. (but actually Newtown, PA: Bird & Bull Press).
- Bachaus, Theodore (pseudonym of Henry Morris) (1980). The Private Presses of San Serriffe. Port Clarendon, San Serriffe: San Serriffe Publishing Company (but actually Newtown, PA: Bird & Bull Press).
- Bachaus, Theodore (pseudonym of Henry Morris) (1988). The first fine silver coinage of the Republic of San Serriffe: the Bird & Bull Press commemorative 100 coronas: including an account of this legendary republic and its connection with the Bird & Bull Press: with description of similar numismatic rarities and a 30-year checklist of work produced by the Press, 1958-1988. Port Clarendon, San Serriffe: San Serriffe Publishing Company (but actually Newtown, PA: Bird & Bull Press).
- Bachaus, Theodore (pseudonym of Henry Morris) (2001). The Booksellers of San Serriffe. Port Clarendon, San Serriffe: San Serriffe Publishing Company (but actually Newtown, PA: Bird & Bull Press).
- Bachaus, Theodore (pseudonym of Henry Morris) (2010). The San Serriffe Postal Service. Port Clarendon, San Serriffe: San Serriffe Publishing Company (but actually Newtown, PA: Bird & Bull Press).
- Museum of Hoaxes the history of the hoax, with pictures of the entire supplement
- Foolish things, David McKie, The Guardian, 1 April 2006 explaining how the original hoax came about and the impact it caused
- Some rough guides to San Seriffe, The Guardian, 5 April 1999
- How young Tony Blair tuned into a new type of politics, The Guardian, 2 April 1999
- Return to San Serriffe, Berlin Sans, The Guardian, 1 April 1999
- The leader's rise to power in San Serriffe, Mark Arnold-Forster, The Guardian, 1 April 1977
- Spiking the cultural roots, Tim Radford, The Guardian, 1 April 1977
- Guardian article with high-resolution scan of first page, 27 March 2012
- San Serriffe travel guide from Wikivoyage - 2007 April Fools Project.
- San Serriffe history with coin image