Constitutional Decree Anniversary, Mordad 14, commemorates the issuance of the Constitutional Decree by Mozaffar ad-Din Shah Qajar in Iran. The decree was issued in 1906 and is recognized as a turning point in the country’s political history. It initiated the Constitutional Era and led to the establishment of the National Consultative Assembly, paving the way for major changes in Iran’s governmental structure. On this date, the efforts of citizens, intellectuals, and political activists to achieve rule of law and limit the absolute power of the monarchy are remembered. The issuance of the decree contributed to the formation of new civil and legal institutions and played a significant role in the development of Iran’s political and social culture. The Constitutional Decree Anniversary remains important in Iran’s modern history and is observed each year as a symbol of the movement toward legal reform and public participation in governance. This observance was officially added to the Iranian calendar to commemorate the issuance of the Constitutional Decree by Mozaffar ad-Din Shah Qajar in 1906, marking the beginning of the Constitutional Era.