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  2. Zoroastrian calendar - Wikipedia

    en.wikipedia.org/wiki/Zoroastrian_calendar

    The Shahanshahi calendar (also Shahenshahi, Shahenshai) or "imperial" calendar is the system described in Denkard, a 9th-century Zoroastrian text. It explicitly acknowledged several methods of intercalation: [24] a leap-day every 4 years; adding ten days every 40 years; a leap-month of 30 days once every 120 years;

  3. Zoroastrian festivals - Wikipedia

    en.wikipedia.org/wiki/Zoroastrian_festivals

    The Zoroastrian calendar was originally a 360-day luni-solar calendar, and also without intercalation, with the result that the seasons and the seasonal festivals gradually drifted apart. A first calendar reform (of uncertain date) introduced five epagomenal days at the end of the year, with the result that each festival then had two dates: one ...

  4. Iranian calendars - Wikipedia

    en.wikipedia.org/wiki/Iranian_calendars

    The Iranian calendars or Iranian chronology ( Persian: گاه‌شماری ایرانی, Gâh-Şomâriye Irâni) are a succession of calendars created and used for over two millennia in Iran, also known as Persia. One of the longest chronological records in human history, the Iranian calendar has been modified many times for administrative ...

  5. Mehregan - Wikipedia

    en.wikipedia.org/wiki/Mehregan

    Mehregan is an Iranian festival honoring the Zoroastrian yazata (angelic divinity) Mithra. [2] [4] Under the Achaemenid Empire (330–550 BC), the Armenian subjects of the Persian king gave him 20,000 horses every year during the celebration of Mehregan. Under the Sasanian Empire (224–651), Mehregan was the second most important festival ...

  6. Zoroastrianism - Wikipedia

    en.wikipedia.org/wiki/Zoroastrianism

    Zoroastrianism, also known as Mazdayasna and Behdin, is an Iranian religion. One of the world's oldest organized faiths, it is based on the teachings of the Avesta and the Iranian prophet Zoroaster. Zoroastrians exalt an uncreated and benevolent deity of wisdom, commonly referred to as "Ahura Mazda" ( Avestan: 𐬀𐬵𐬎𐬭𐬋 ...

  7. Yaldā Night - Wikipedia

    en.wikipedia.org/wiki/Yaldā_Night

    The history of Persian calendars initially points back to the time when the region of modern-day Persia celebrated their new years according to the Zoroastrian calendar. As Zoroastrianism was then the main religion in the region, their years consisted of "Exactly 365 days, distributed among twelve months of 30 days each plus five special month ...

  8. Frawardigan - Wikipedia

    en.wikipedia.org/wiki/Frawardigan

    Like all other Zoroastrian festivals, Frawardigan was originally a one-day festival, in this case observed on the last day of the religious year. That day, the last day of the religious year, is now known as Pateti, from patet, "confession", a day of self-reflection prior to the celebration of Zoroastrian New Year's Day.

  9. Nowruz - Wikipedia

    en.wikipedia.org/wiki/Nowruz

    Nowruz is the first day of Farvardin, the first month of the Iranian solar calendar, which is the official calendar in use in Iran, and formerly in Afghanistan. The United Nations officially recognized the "International Day of Nowruz" with the adoption of Resolution 64/253 by the United Nations General Assembly in February 2010.

  10. Solar Hijri calendar - Wikipedia

    en.wikipedia.org/wiki/Solar_Hijri_calendar

    The very first day of the Solar Hijri calendar was the day of the Spring equinox, 622 AD. The calendar is named the "Hijri calendar" because the year 622 A.D. was the year that Mohammed is believed to have fled from Mecca to Medina, which event is referred to as the Hijrah. This year is generally considered by Muslims as the first year of Islam.

  11. History of calendars - Wikipedia

    en.wikipedia.org/wiki/History_of_calendars

    The history of calendars covers practices with ancient roots as people created and used various methods to keep track of days and larger divisions of time. Calendars commonly serve both cultural and practical purposes and are often connected to astronomy and agriculture . Archeologists have reconstructed methods of timekeeping that go back to ...