What is the name of the festival where a red dog was sacrificed to Robigus?

The festival associated with the sacrifice of a red dog to Robigus is known as Robigalia. This ancient Roman festival was celebrated to appease the god Robigus, who was associated with the protection of crops, particularly grain, against diseases such as rust. During the celebration, offerings were made, including the sacrifice of a red dog, in hopes of ensuring a healthy harvest. This ritual demonstrates the Romans' deep connection to agriculture and their belief in divine intervention in natural processes.

In contrast, Saturnalia was a festival dedicated to Saturn, characterized by feasting and social inversion. Parilia, on the other hand, was celebrated to honor the shepherd deity and ensure the safety of livestock. Terminalia was a festival for the guardian spirits of boundaries. Each of these festivals has its unique themes and deities but does not relate to the specific act of sacrificing a red dog to Robigus as mentioned in Robigalia.