The True History and Timeline of Zoroastrianism:
http://milli.110mb.com/zoroastrian.htm
The religion Zoroastrianism (Good Conscience) was first Universal and Monotheist Religion in History and the root of much of Jewish, Christian and Islamic doctrine and belief. Zoroastrianism is the oldest of the revealed world-religions, and it has probably had more influence on mankind, directly and indirectly, than any other single faith. Over the millenia, the words and compositions of its founder “Zarathushtra Spitaman” were lost due to passage of time and the obsolescence of its language. Its original message was lost because of accidents of history, as libraries and books were burned again and again by invaders and its wise men were either killed, enslaved, deported or went into hiding. However, thanks to the long, arduous and painstaking work of literally thousands of scholars in the last decades, the original message of Zoroastrianism has surfaced once again, revealing it as ever-relevant, unique and inspiring. While Zoroastrianism was once the dominant religion of Persia, the number of adherents has dwindled to not more than 200,000 Zoroastrians worldwide. It is important to note that Zoroastrianism is not an oriental mystic sect or cult, but a World Religion for all Mankind.
http://milli.110mb.com/zoroastrian.htm
This web page above is dedicated to the divine message revealed by “Zarathushtra Spitama” who was known to the ancient World as Zoroaster. About 3745 years ago, Zarathushtra gave to the world pure Monotheism and preached that there is only One God whom he referred to as the “Lord of Wisdom” and the guardian of the cosmic order. Zoroastrianism introduced the concepts of: monotheism, duality of Good and Evil, mankind’s free choice between the two alternatives, messianic redemption, resurrection, final judgement, heaven (the word “paradise” comes from Old Persian), hell and the notion of an almighty, kind, loving and forgiving God. He believed man’s salvation in life and in the afterlife could only be ensured through Good Thoughts, Good Words and Good Deeds. Many of these concepts had a profound influence on Judaism and Christianity. Persians adopted Zoroastrianism at a time when Greeks and, later, Romans still practiced polytheistic religions.
Timeline: Zarathushtra built an observatory in Zabol, Sistan (eastern Iran) and it was inaugurated on 21st March 1725 BC, the day King Vishtasp of Persia and his court converted, chose the Good Religion of Zoroastrianism and joined the Zoroastrianism Fellowship. It also provides us with the clue that the Zoroastrianism was founded by “Zarathushtra Spitama” exactly twelve years earlier on vernal equinox of the 1737 BC. Most scholars and historians today agree on a time-frame for Zarathushtra as early as 1700 B.C. The Zoroastrian Calendar is based on his 40th Birthday, so right now, the year is 3745 Zoroastrian Holy Year.