Article 15
The official language and script of Iran, the lingua franca of its people, is Persian. Official
documents, correspondence, and texts, as well as text-books, must be in this language
and script. However, the use of regional and tribal languages in the press and mass
media, as well as for teaching of their literature in schools, is allowed in addition to
Persian.
Article 16
Since the language of the Qur'an and Islamic texts and teachings is Arabic, and since
Persian literature is thoroughly permeated by this language, it must be taught after
elementary level, in all classes of secondary school and in all areas of study.
Article 17
The official calendar of the country takes as its point of departure the migration of the
Prophet of Islam - God's peace and blessings upon him and his Family. Both the solar
and lunar Islamic calendars are recognized, but government offices will function
according to the solar calendar. The official weekly holiday is Friday.
Article 18
The official flag of Iran is composed of green, white and red
colors with the special emblem of the Islamic Republic, together
with the motto [Allah-o Akbar].
