* Astronomy

Mehrgan is a Zoroastrian and Iranian festival celebrated since the pre-Islamic era to honour the Yazata of "Mehr" (Persian: Mehr or Mihr), which is responsible for friendship, affection and love.
The Fasili and Bastani variants of the religious calendar adhere to Gregorian intercalation (leap-day) rules, and therefore Mehregn is celebrated on a day that is fixed in relation to the Gregorian calendar. Mehrgn is then always on October 2nd.
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