The first Constitution of Azerbaijan was adopted on the 19th of May, 1921 at the All-Azerbaijan Soviets Congress.
New variant of the Constitution of Azerbaijan SSR fitted to the Constitution of the USSR of 1921, adopted at the 4th All-Azerbaijan Soviets Congress in the 14th of March, 1925.
The final Constitution of Azerbaijan SSR was adopted on the 21st of April 1978, and added to the Constitution of the USSR like the previous.
After Azerbaijan got its independence appeared a necessary to implement a new Constitution. A commission headed by Heydar Aliyev was established for this purpose. The final document of the Constitution waspresented to the people by referendum. The first Constitution of the independent Azerbaijan was then adopted with the referendum of the 12th of November, 1995.
The first Constitution of the independent Azerbaijan was the basis of the State establishment of the Republic of Azerbaijan. The New Constitution of Azerbaijan was composed of 5 parts, 12 chapters and 158 articles.
Beginning from that day November 12 is the Day of the celebration of the Constitution of the Republic of Azerbaijan.
Though a holiday is still considered a working day.