Literature in Iran
Persian is Iran's official language and the language of the country's ethnic majority (i.e., the Persians), and Persian literature has been the country's most influential literary tradition. Apart from Iran, Persian literature was used and developed further through several medieval Persianate societies in Asia Minor, Central Asia, and South Asia, and the language is still used widely in Central Asia (Tajikistan and Uzbekistan) and Afghanistan.
Afghanistan–Iran relations
Despite these event of the past, there are cultural ties between the two nations extending thousands of years. As a result, an eastern dialect of Persian, Dari is one of the official language of Afghanistan. Many in Afghanistan celebrate Nowruz, a pre-Islamic Iranian spring celebration celebrated in many countries and regions in the world, of which the main representative is Balkh (a province in the north of Afghanistan).