National Peanut Cluster Day is observed in the United States every year on March 8. This holiday celebrates peanut clusters, a type of candy made with melted chocolate and peanuts, combining sweet and slightly salty flavors. While the origin of peanut clusters is not officially documented, food historians suggest that they emerged in America after chocolate treats became popular due to influences from Belgium. Initially, these clusters were made without chocolate, using honey or caramel to bind the nuts. The invention of a machine by Elmo Lanzi in the 1930s automated the process of coating peanut clusters in chocolate, significantly popularizing this treat. On this day, people are encouraged to enjoy various peanut cluster recipes, although substitutions with other nuts do not qualify as peanut clusters.