ZoroastrianismA well-trained priest is able to recite the entire Yasna in about two hours. (Stausberg, 2004337,n131) With extensions, it takes about an hour longer. Yasna chapter and verse pointers are traditionally abbreviated with Y.
The Yasna service, that is, the recitation of the Yasna texts, culminates in the Ab-Zohr, the "offering to waters". The Yasna ceremony may be extended by recitation of the Visperad and Vendidad.
As the name of the service, the term Yasna is linguistically (but not functionally) cognate with Vedic Yajna. Unlike Vedic Yajna, Zoroastrian Yasna has "to do with water rather than fire" (Drower, 194478; Boyce, 1975147-191)
