Source: IranMania

http://www.iranmania.com/News/ArticleView/Default.asp?NewsCode=39145&NewsKind=Current%20Affairs

On December 27, 2005 IranMania reported, "Zoroastrian Association in Tehran held a ceremony in commemoration of Prophet Zarathustra (Zoroaster) in Tehran on 26th of December which is the anniversary of his death, said CHN. Zarathushtra or Zarathustra (628 BC) is the ancient Persian prophet and founder of Zoroastrianism or Parsism, as it is known in India. Zoroaster is generally accepted as a historical figure, but the definite date of his appearance is not known exactly. According to some scholars? estimates, Zoroaster came around 1000 BC. Others, however, give earlier estimates, making him a candidate as the founder of the earliest religion based on revealed scripture, while still others place him in the 6th century BC which would make him contemporary to the rise of the Achaemenid dynasty."