Constitution of the Islamic Republic formalized, Azar 12. On this date in 1979, the Constitution of the Islamic Republic was officially announced and put into effect after being approved in a nationwide referendum. The referendum saw broad public participation, with a majority voting in favor of the new constitution. This document established the political and legal structure of the country following the 1979 revolution and defined the fundamental principles of the Islamic Republic system. With the implementation of the constitution, new institutions such as the Islamic Consultative Assembly and the Guardian Council were created, and the role of leadership was formalized within the government structure. This marked the beginning of a new era in Iran’s legislative and governance systems, significantly influencing the country’s political and social trajectory. The constitution details the rights and duties of citizens, the principles of state administration, and the procedures for selecting officials. The formalization of the Constitution of the Islamic Republic on Azar 12, 1979, is considered a turning point in modern Iranian history. This date serves as a reminder of the start of a new period of legislation and governance in Iran and is noted in some circles and media each year. This observance was added to the official Jalali calendar in 1979 by decision of the authorities at the time, in order to commemorate the establishment of the new political structure. According to Islamic Republic sources, this observance is registered and presented in the official calendar in this form and with these descriptions.