April 25th
The Robigalia
“Warding off” was the entire purpose of this festival, celebrated annually on April 25. It focused on the deity Robigus, whose main attribute was the ability to destroy the dreaded rust or red mildew, a scourge that sometimes attacked the corn (the city’s principle food crop). As this deity was associated with the God Mars, all of this day’s activities were overseen by the Flamen Martialis, including the offerings of sheep and a red dog to appease Robigus.