1. The Swiss Spaghetti Harvest
On 1 April 1957, the respected BBC news show Panorama announced that thanks to a very mild winter and the virtual elimination of the dreaded spaghetti weevil, Swiss farmers were enjoying a bumper spaghetti crop. It accompanied this announcement with footage of Swiss peasants pulling strands of spaghetti down from trees. Huge numbers of viewers were taken in. Many called the BBC wanting to know how they could grow their own spaghetti tree. To this the BBC diplomatically replied, "place a sprig of spaghetti in a tin of tomato sauce and hope for the best."
2. Sidd Finch
The April 1985 issue of Sports Illustrated contained a story about a new rookie pitcher who planned to play for the Mets. His name was Sidd Finch, and he could reportedly throw a baseball at 168 mph with pinpoint accuracy. This was 65 mph faster than the previous record. Surprisingly, Sidd Finch had never even played the game before. Instead, he had mastered the "art of the pitch" in a Tibetan monastery under the guidance of the "great poet-saint Lama Milaraspa." Mets fans celebrated their teams' amazing luck at having found such a gifted player, and they flooded Sports Illustrated with requests for more information. In reality this legendary player only existed in the imagination of the author of the article, George Plimpton, who left a clue in the sub-heading of the article: "He's a pitcher, part yogi and part recluse. Impressively liberated from our opulent life-style, Sidd's deciding about yoga —and his future in baseball." The first letter of each of these words, taken together, spelled "H-a-p-p-y A-p-r-i-l F-o-o-l-s D-a-y — A-h F-i-b".