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].