The beginning of the formation of calendar sects among the Zoroastrians in India according the Adharu Kersasp's verse in Ms. No. XLVIII of Mumbai university library

Zoroastrianism is one of the oldest religions in the world that its documents are scattered in most ancient languages ​​and ancient civilizations. Now, we hear the echoes of its voice over the course of history so that it can be traced in all lands and cultures. From Far East to Middle East and Europe and America, Zoroastrian texts are kept in well known libraries, as human heritage. Meanwhile, India has a special situation. Aside from the links of the Vedic and Gathas age, India welcomed the Iranian Zoroastrian immigrants in the days after the Sassanid reign. Thus, a large part of the cultural documents of Iran were transferred to India during the last millennium.Investigating and introducing these documents has an important role in clarifying the dark angles of the history of Zoroastrianism. In this paper, the importance of one of these documents is expressed: The Adharu Kersasp's verse which well shows that how Parsi Calendar sects were formed at the end of the yazdgirdi 12th century