National Lamington Day is observed in Australia on July 21 each year, celebrating the country's iconic dessert, the lamington. This beloved treat consists of squares of sponge or butter cake coated in chocolate sauce and rolled in desiccated coconut, often with a layer of strawberry jam or cream between two squares. The dessert is believed to be named after Charles Cochrane-Baillie, 2nd Baron Lamington, or his wife, Lady Lamington, with its first mention linked to them dating back to 1927. The lamington's creation is credited to Lord Lamington’s chef, Arman Galland, who improvised with leftover ingredients to feed unexpected guests. While its exact origin remains unclear, it is cherished as a cultural icon in Queensland, included in the state’s list of innovations during the Q150 celebrations. Australians have been celebrating National Lamington Day since 2006, often enjoying the cake and sharing their experiences on social media with the hashtag #NationalLamingtonDay.