Changing the Solar Hijri Calendar to the Imperial Calendar during the mohammareza Pahlavi rule

 During the mohammadReza pahlavi rule saw severe archaism and are promoting the idea of empire. The shah and his entourage decided to make the most of the symbolic capital of the idea of archaism. One of these measures was to change the source of the solar calendar of the country from Hijri to Imperial to Cyrus. The purpose of the present study is to investigate the process of changing the solar calendar origin from Hijri to Imperial during the Second Pahlavi period and to find an appropriate answer to the main question of this research, what were the purposes and process of converting the Hijri solar calendar to the Imperial calendar and whether the Shah changed Was the nation's calendar from Hijri (religious event) to Imperial (national event) seeking to legitimize its rule or thinking of opposing religion? The method of this research is descriptive-analytical. In 1975, the Shah changed the country's calendar as the Pahlavi dynasty celebrated its 50th anniversary. In doing so, the Shah sought to legitimize his power both domestically and in the West and did not insult Islam, but in practice the Shah removed an Islamic symbol and replaced it with a national symbol, which angered the religious forces. Keywords: Calendar, Solar Hijri Calendar, Imperial calendar, Aristocracy.