World Tripe Day is observed worldwide every October 24, celebrating the culinary potential of tripe, which is the edible lining from the stomachs of various farm animals, primarily cattle. This unofficial holiday was created by the Tripe Marketing Board, which aims to challenge the negative perception of tripe compared to other organ meats like liver and kidneys. The date commemorates an entry from the diary of English diarist Samuel Pepys, who mentioned cooking a "most excellent dish of tripes" on this day in 1662. On World Tripe Day, people are encouraged to purchase tripe, explore recipes, and prepare delicious dishes to share with friends and family, highlighting its versatility in cuisines around the world, such as tripe soup in Eastern Europe and trippa in Italy.