Wide diversity prevails with regard to the date at which the Iranian prophet Zoroaster lived and taught. The Avesta gives no direct information in answer to the inquiry as to the date of Zoroaster. The existing diversity of opinion with reference to the prophet’s date is largely due to certain incongruities in ancient statements on the subject. The allusions to this subject may conveniently be divided into three groups: those that assign the extravagant date of 6000 B.C.E. to Zoroaster; those which connect his name with the more or less legendary Ninus and the uncertain Semiramis; or the traditional date, placing the era of Zoroaster’s teaching at some time during the sixth century B.C.E. From evidence presented and from the accessible material, one is fairly entitled to accept that the period between the latter half of the seventh century and the middle of the sixth century B.C.E. as the approximate date of Zoroaster’s life.