On September 28, 1958, the Constitution of the Fifth French Republic was adopted by more than 82 percent of voters in a nationwide referendum. This constitution was drafted in response to the political instability and repeated government crises of the Fourth Republic, aiming to establish a stronger executive structure. The high level of public participation and support reflected the desire for fundamental changes in the government’s structure. The new constitution granted greater powers to the president and replaced the previous parliamentary system with a semi-presidential one. With its adoption, the Fifth French Republic was officially established, and Charles de Gaulle became its first president. This political transformation had a profound impact on modern French history and continues to shape the country’s government today. This date is officially included in the Gregorian calendar to commemorate the historic adoption of the Fifth Republic’s constitution and the significant changes it brought to France’s political system.