Zoroaster Thus they accorded the same treatment to the Zoroastrian people which they did to other "People of the Book". Though the name of Zoroaster is not mentioned in the Qur'an, still he was regarded as one of those prophets whose names have not been mentioned in the Qur'an, for there is a verse in the Qur'an: "And We did send apostles before thee: there are some of them that We have mentioned to thee and there are others whom We have not mentioned to Thee." (40 : 78). Accordingly, the Muslims treated the founder of Zoroastrianism as a true prophet
Zoroaster 330 BCE. The Seleucid rulers who gained power following Alexander's death instituted an "Age of Alexander" as the new calendrical epoch. This did not appeal to the Zoroastrian priesthood who then attempted to establish an "Age of Zoroaster". To do so, they needed to establish when Zoroaster had lived, which they accomplished by (erroneous, some even identified Cyrus with Vishtaspa) counting back the length of successive generations, until they concluded that Zoroaster must have lived "258 years before Alexander". This estimate then re-appeared in the 9th- to 12th-century Arabic and Pahlavi texts of Zoroastrian tradition, like the 10th century Al-Masudi