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Zoroastrianism is one of the world's oldest monotheistic religions, originating in ancient Persia around the 6th century BCE. Founded by the prophet Zarathustra, it centers on the belief in one supreme creator god, Ahura Mazda, who is engaged in a cosmic struggle against the destructive spirit, Angra Mainyu. The religion likely influenced Judaism, Christianity, and Islam.12

The Zoroastrian calendar historically used a solar year of 365 days, divided into 12 months of 30 days each, with five additional days. This system became official under the Sasanian dynasty and was later adapted to include leap years. Key festivals include the six seasonal Gahambars and the New Year festival, Nowruz. Despite periods of persecution in Iran, Zoroastrianism's cultural influence, particularly through traditions like Nowruz, persists.3456

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