The Achaemenids held elaborate festivities, feasts, and ceremonies to honor the changing of the seasons and the renewal of life. Nowruz was also an important political event during the Achaemenid Empire, as it was celebrated by people from all walks of life, regardless of their social or religious background. This inclusivity helped to foster a sense of unity and national pride among the diverse population of the empire. Even after the fall of the Achaemenid Empire, Nowruz continued to be celebrated by the succeeding Persian dynasties, including the Parthians and Sassanids, and it eventually spread to other countries in the region.