Off all the many ancient Egyptian festivals, local as well as nationwide, there was one which differed quite a bit from the rest. While they all were aimed at the relationship between the gods, the king and the people, the Heb Sed was more directly focussed around the kingship as such and its complete renewal.
The name Heb Sed, also known as The Sed festival or Feast of the Tail, derives from the name of an Egyptian wolf god, one of whose names was Wepwawet or Sed. The less formal feast name, the Feast of the Tail, is derived from the name of the animal's tail that typically was attached to the back of the pharaoh's garment in the early periods of Egyptian history. This suggests that the tail was the vestige of a previous ceremonial robe made out of a complete animal skin.
A Heb Sed was first held during the 30th regnal year of a pharaoh, and from then on, every three years, but several pharaohs however, held their first Heb Sed at a much earlier date: Hatshepsut held her first jubilee during her 16th regnal year, while Amenhotep IV/Akhenaten chose to dedicate his festival to his solar-god Aten at the early beginnings of his reign. Ramesses II often left two instead of three years between his Heb Seds, he was able to celebrate 14 such jubilees during his 67 years of reign.