World Marmite Day is observed worldwide every September 28, celebrating the unique food spread made from yeast extract known as Marmite. This sticky, dark brown paste, which has a distinctive umami flavor, was invented by German scientist Justus von Liebig, who discovered that concentrated yeast could be made into an edible paste. The Marmite Food Company was established in 1902 in Burton Upon Trent, England, a city known for its breweries. Initially sold in earthenware pots, the name "marmite" is French for a cooking pot, and although it is now packaged in glass jars, the label still features the pot's image. Marmite gained popularity due to its high B vitamin content, especially during World War I when it was included in army rations to prevent vitamin deficiencies. The trademark has been owned by Unilever since the early 2000s, which produces various Marmite products, including limited editions and unique flavors. On this day, fans of Marmite indulge in their favorite spread, often enjoying it thinly spread on toast or mixed into dishes for added flavor.