Festival Sed biin conto nyane, ngerayain warsa ka telung dasa pamerintahan firaun Mesir lan salanturnyane karayaang sawilang tiga (utawi papat ring asiki kasus utawi masalah) warsa sasampun punika.
The Sed festival, for example, celebrated the thirtieth year of an Egyptian pharaoh's rule and then every three (or four in one case) years after that.