The British Archive article (OP), says that the holy book of the Zoroastrians was written sometime around 224-651. Of course, the New Testament contains unambi

The British Archive article (OP), says that the holy book of the Zoroastrians was written sometime around 224-651. Of course, the New Testament contains unambiguous and extensive references to Zoroastrianism so clearly it must be far older than the origin given for the Avesta. so clearly Zoroastrianism is much older than the origin of the Avesta. Is there a generally accepted date of origin for the former?