Asha in the context of "Atar"

Mithra (Avestan: 𐬨𐬌𐬚𐬭𐬀 Miθra; Old Persian: 𐎷𐎰𐎼 Miθraʰ‍) is an ancient Iranian deity (yazata) of covenants, light, oaths, justice, the Sun, contracts, and friendship. In addition to being the divinity of contracts, Mithra is also a judicial figure, an all-seeing protector of Truth (Asha), and the guardian of cattle, the harvest, and the Waters.

The Romans attributed their Mithraic mysteries to Zoroastrian Persian sources relating to Mithra. Since the early 1970s, the dominant scholarship has noted dissimilarities between the Persian and Roman traditions, making it, at most, the result of Roman perceptions of Zoroastrian ideas.

Proto-Indo-Iranian religion was the religion of the Indo-Iranian peoples and includes topics such as the mythology, legendry, folk tales, and folk beliefs of early Indo-Iranian culture. Reconstructed concepts include the universal force *Hṛta- (Sanskrit rta, Avestan asha), the sacred plant and drink *sawHma- (Sanskrit Soma, Avestan Haoma) and gods of social order such as *mitra- (Sanskrit Mitra, Avestan and Old Persian Mithra, Miϑra) and *bʰaga- (Sanskrit Bhaga, Avestan and Old Persian Baga). Proto-Indo-Iranian religion is an archaic offshoot of Indo-European religion.

The Solar Hijri calendar is the official calendar of Iran. It is a solar calendar, based on the Earth's orbit around the Sun. Each year begins on the day of the March equinox and has years of 365 or 366 days. It is sometimes also called the Shamsi calendar, Khorshidi calendar or Persian calendar and the most recent of the Iranian calendars. It is abbreviated as SH, HS, AP, or, sometimes as AHSh, while the lunar Hijri calendar (commonly known in the West as the 'Islamic calendar') is usually abbreviated as AH.

The epoch (very first day) of the Solar Hijri calendar was the day of the spring equinox, March 19, 622 CE. The calendar is a "Hijri calendar" because that was the year that Mohammed is believed to have left from Mecca to Medina, which event is referred to as the Hijrah.