Zoroastrian festivals

Nowruz (, , ) is New Year's Day on the Iranian calendars, including the currently used Solar Hijri calendar. Historically, it has been observed by Iranian peoples, but is now celebrated by many Persianate cultures worldwide. It is a festival based on the Northern Hemisphere spring equinox, and thus usually coincides with a date between 19 March and 22 March on the Gregorian calendar.

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

Sadeh ( also transliterated as Sade), is an Iranian festival that dates back to the Achaemenid Empire. Sadeh is celebrated 50 days before Nowruz. Sadeh in Persian means "hundred" and refers to the one hundred days and nights remaining to the beginning of spring. Sadeh is a mid-winter festival that was celebrated with grandeur and magnificence in ancient Persia. It was a festivity to honor fire and to defeat the forces of darkness, frost, and cold.

Tirgan (, Tirgān), is an early summer ancient Iranian festival, celebrated annually on Tir 13 (July 2, 3, or 4). It is celebrated by splashing water, dancing, reciting poetry, and serving traditional foods such as spinach soup and sholezard. The custom of tying rainbow-colored bands on wrists, which are worn for ten days and then thrown into a stream, is also a way to rejoice for children.

Zoroastrian religious commemorations

The seasonal festivals, called gahambars (meaning "proper season"), occur six times a year. Due to the peculiarities of the Shahenshahi and Kadmi variants of the Zoroastrian calendar, in those variants the seasonal festivals are actually celebrated many months in advance and are therefore said to reflect the six "primordial creations" of Ahura Mazda, otherwise known as the Amesha Spentas. Each of these festivals is celebrated over five days. The six festivals are:

Sepandārmazgān () or Espandegān (), is an ancient Iranian day of women with Zoroastrian roots. This day is dedicated to Spənta Ārmaiti (Avestan for "Holy Devotion", ' in Middle Persian, ' or ''''), the Amesha Spenta who is given the domain of "earth". The date of the festival as observed in the Sassanid era was on the 5th day of the month Spandarmad. When the name of the day and the month of the day were the same, a "name-feast" celebration was always done. According to the testimony of al-Biruni, in the 11th century CE there was a festival when the names of the day and the month were the same

Zoroastrian observance