ArticleslgStudy

astronomy

Mehregan

Mehregan is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Mehregan rather than just read about it. In short: Mehregan (Persian: مهرگان) or Jashn-e Mehr (جشن مهر lit. Mithra Festival) is an Iranian festival celebrated to honor the Zarathustrian yazata Mithra (Persian: Mehr), which is responsible for friendship, affection and love.

Mehregan — main illustration
Mehregan — illustration

Key takeaways

  • Mehregan belongs to astronomy; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Mehregan to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Mehregan from memory before moving on to harder problems.

Reference excerpt

Mehregan (Persian: مهرگان) or Jashn-e Mehr (جشن مهر lit. Mithra Festival) is an Iranian festival celebrated to honor the Zarathustrian yazata Mithra (Persian: Mehr), which is responsible for friendship, affection and love.

Name Persian "Mehregân" (Celebration of Mehr) is derived from the Middle Persian expression Mihragān, itself derived from Old Persian Mithrakāna or Mithracina.

Introduction Mehregan is an Iranian festival honoring the Zoroastrian yazata Mithra. Under the Achaemenid Empire (550–330 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, falling behind Nowruz. Due to these two festivals being heavily connected with the role of Iranian kingship, the Sasanian rulers were usually crowned on either Mehregan or Nowruz. In Biruni's eleventh-century Book of Instructions in the Elements of the Art of Astrology (233), the astronomer observed that "some people have given the preference to Mihragān [over Nowruz, i.e. New Year's day/Spring Equinox] by as much as they prefer autumn to spring." As Biruni also does for the other festival days he mentions, he reiterates a local anecdotal association for his description of Mehregan with a fragment of a tale from Iranian folklore: On this day, Fereydun vanquished the evil Zahhak and confined him to Mount Damavand. This fragment of the legend is part of a greater cycle that ties Mehrgan with Nowruz; Dahak vanquished Jamshid (who the legends have as the one establishing Nowruz or New Year's Day), and Fereydun vanquishes Zahhak, so restoring the balance. The association of Mehregan with the polarity of spring/autumn, sowing/harvest and the birth/rebirth cycle did not escape Biruni either, for as he noted, "they consider Mihragān as a sign of resurrection and the end of the world, because at Mihragān that which grows reaches perfection."

In ancient times

Mehregān was celebrated in an extravagant style at Persepolis. Not only was it the time for harvest, but it was also the time when the taxes were collected. Visitors from different parts of the Persian Empire brought gifts for the king all contributing to a lively festival. Mehregān is celebrated with the same magnificence and pageantry as Nowruz. In ancient times, it was customary for people to send or give their king, and each other, gifts. Rich people usually gave gold and silver coins, heroes and warriors gave horses while others gave gifts according to their financial power and ability, even as simple as an apple. Those fortunate enough would help the poor with gifts. Gifts to the royal court of over ten thousand gold coins were registered. If the gift-giver needed money at a later time, the court would then return twice the gift amount. Kings gave two audiences a year: one audience at Nowruz and other at Mehregān. During the Mehregān celebrations, the king wore a fur robe and gave away all his summer clothes.

In the present-day On October 2, 2022, which coincided with Mehregan, there were series of ceremonies conducted across Iran. These ceremonies were involved in the provinces of Tehran, Yazd, Kurdistan, West Azerbaijan, Zanjan, Sistan and Baluchestan, Isfahan, Bushehr, North Khorasan, and Golestan.

Basis for the date As noted above, Mehregān is a name-day feast. These name-day feasts are festivals celebrated on the day of the year when the day-name and month-name dedicated to a particular angel or virtue intersect. Ancient Persia had 30-days months, which means that each day in a month had a different name, with 12 of the days also being names of the 12 months. The day whose name corresponded to the name of the month was celebrated.

See also List of festivals in Iran Zoroastrian festivals

References

Sources Boyce, Mary (1983). "Iranian festivals". In Yarshater, Ehsan (ed.). The Cambridge History of Iran. Vol. 3(2). Cambridge: Cambridge University Press. pp. 792–816. doi:10.1017/CHOL9780521200929.006. ISBN 0-521-24693-8. Boyce, Mary; Grenet, Frantz (1991). Beck, Roger (ed.). A History of Zoroastrianism, Zoroastrianism under Macedonian and Roman Rule. Leiden: Brill. ISBN 978-9004293915. Calmard, J. (1993). "Mihragān". In Bosworth, C. E.; van Donzel, E.; Heinrichs, W. P. & Pellat, Ch. (eds.). The Encyclopaedia of Islam, Second Edition. Volume VII: Mif–Naz. Leiden: E. J. Brill. pp. 15–20. ISBN 978-90-04-09419-2. Canepa, Matthew (2018). The Iranian Expanse: Transforming Royal Identity Through Architecture, Landscape, and the Built Environment, 550 BCE–642 CE. Oakland: University of California Press. ISBN 9780520379206. Cristoforetti, Simone (2000). "Mehragān". Encyclopædia Iranica, online edition. New York: Brill. Payne, Richard E. (2015). A State of Mixture: Christians, Zoroastrians, and Iranian Political Culture in Late Antiquity. Univ of California Press. ISBN 978-0-520-29245-1. Rose, Jenny (2015). "Festivals and the Calendar". In Stausberg, Michael; Vevaina, Yuhan Sohrab-Dinshaw; Tessmann, Anna (eds.). The Wiley Blackwell Companion to Zoroastrianism. John Wiley And Sons Ltd. pp. 379–393. Russell, James R. (1987). Zoroastrianism in Armenia. Harvard University Press. ISBN 978-0674968509. Sanders, P.; Chalmeta, P.; Lambton, A.K.S.; Groot, A.H. de & Burton-Page, J. (1991). "Marāsim". In Bosworth, C. E.; van Donzel, E. & Pellat, Ch. (eds.). The Encyclopaedia of Islam, Second Edition. Volume VI: Mahk–Mid. Leiden: E. J. Brill. pp. 518–534. ISBN 978-90-04-08112-3. Shaked, Shaul (2015). "Islam". In Stausberg, Michael; Vevaina, Yuhan Sohrab-Dinshaw; Tessmann, Anna (eds.). The Wiley Blackwell Companion to Zoroastrianism. John Wiley And Sons Ltd. pp. 491–499.

Illustrations

Mehregan illustration
Mehregan: Tajiks celebrate Mehregan in Dushanbe
Tajiks celebrate Mehregan in Dushanbe

Worked examples

Example 1 — a first encounter with Mehregan

Start with the simplest possible case. Write down what Mehregan claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Mehregan before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Mehregan ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Mehregan

In research
Mehregan appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Mehregan in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Mehregan is common in secondary-school and first-year university syllabi. It links to neighbouring topics Autumn equinox, Autumn in Iran, Festivals in Iran, so understanding it makes those chapters shorter.
In everyday life
Look for Mehregan outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Mehregan in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Mehregan means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Mehregan out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Mehregan in simple terms?

Mehregan (Persian: مهرگان) or Jashn-e Mehr (جشن مهر lit. Mithra Festival) is an Iranian festival celebrated to honor the Zarathustrian yazata Mithra (Persian: Mehr), which is responsible for friendship, affection and love.

Why does Mehregan matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Mehregan?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Mehregan.

Tags

  • Autumn equinox
  • Autumn in Iran
  • Festivals in Iran
  • Observances set by the Solar Hijri calendar
  • October observances
  • Persian words and phrases
  • Zoroastrian festivals

Keep exploring