Twelver Shi'i Islam is totally dominating the Iranian society, not only as creed, but also with its impact on the political system.
Iran scores poorly on the regional MENA ranking, coming in as number 15 among 22 countries. Iran scores low on most factors, and the doctor density is surprisingly low for a country with 130 universities.
The time of Islamic festivals is calculated according to local sightings of various phases of the moon and the dates given below are approximations which are subject to change each year.