# [[Archduke's Day]] >25th of Suntide 1009 It marks the day that [[Archduke Antonio Costa Valverde Mondragon Vieira de Valiant]] became the Archduke of [[Ibir]]. Celebrated with a festival where the [[Imperial Army]] parades the street of most settlements, and an envoy of the Archduke swears fealty to the [[Empire of Light]] in to a high-ranking representative of the Army.