In addition to the National Day, on the Serbian Constitution Day, Memorial Day and the beginning of the Serbian revolution (or the First Serbian Uprising).
Chronological:

     * 15 February 1804. started the first Serbian uprising;
     * 15 februar 1835th Sretenjski constitution was adopted, the first constitution of Serbia, one of the most modern, most democratic and liberal constitution of his age. It is in Serbia abolished feudalism (the first in Europe) and also was a reflection of the easternmost French Revolution.