Nowruz is commonly perceived as the most “Iranian” of all celebrations, emphasising an Aryan/Indo-Iranian root for the celebration. However, the lack of any mention of Nowruz or the traditional, well-known celebrations associated with it in Achaemenid inscriptions as well as the oldest parts of the Avesta, the Old Iranian hymns of Zoroastrianism, can point to the non-Iranian roots of the celebration.