World Idli Day is observed worldwide every March 30, celebrating the popular South Indian breakfast dish, idli. This holiday was initiated in 2015 by M. Eniyavan, an idli caterer from Chennai. Idlis are savory rice cakes made from fermented black lentils and rice, with historical references dating back to the 10th century AD. The preparation involves soaking rice and mungo beans, grinding them, and allowing the mixture to ferment overnight before steaming. Idlis are typically served with condiments like sambar and chutneys, and variations exist, such as rava idli made with semolina. The day highlights the cultural significance of idli in South Indian cuisine and encourages people to enjoy this traditional dish.