The Zoroastrian celebration of the birth of Zoroaster, the founder of the Zoroastrianism religion. The holiday is specifically celebrated in India and Iran, immediately following the Persian New Year, Nowrúz.

Source:

“Calendar of Observances.” Anti-Defamation League, 2019, www.adl.org/education/resources/tools-and-strategies/calendar-of-observances. Accessed 25 Sept. 2020.