One of the oldest festivals of ancient Egypt, celebrated by the king after 30 years of rule and repeated every three years thereafter.
The event was probably a ritual reenactment of the unification of Egypt by Menes с 3000 BC. After beginning the celebration by offering a sacrifice to the gods, the king was crowned with the white crown of Upper Egypt, followed by the red crown of Lower Egypt. He then ran a ritual course four times, before being carried in procession to the chapels of Horus and Seth .