May 24 is celebrated in Bulgaria as the Day of Bulgarian Enlightenment and Culture and of the Slavonic Alphabet.
The day is celebrated throughout the country with festivities.

Besides Bulgarian Enlightenment and Culture, the day is dedicated to the invention of the Slavonic or Cyrillic alphabet by the brothers SS Cyril and Methodius. The two brothers, still considered by many Bulgarians as having been Bulgarian, are credited with the invention of an early version of the Cyrillic alphabet, the Glagolitic alphabet. The alphabet has also been credited to Saint Clement of Ohrid, who was a disciple of Saints Cyril and Methodius. More recent studies have suggested that the Cyrillic alphabet was more likely developed at the Preslav Literary School in northeastern Bulgaria.

As part of the celebrations, a ceremony was held in front of the National Library in Sofia, the location of a statue of SS Cyril and Methodius in the presence of over 1300 school children from around the country, 8 youth brass orchestra's and 8 marching bands.

In his speech at the celebrations, Bulgarian President Georgi Parvanov said the government had an obligation in education and more specifically in the education of literary Bulgarian. This obligation should be reflected in the investment government made in education, Parvanov said.

Sofia mayor Boiko Borissov remarked in his speech that, if all Bulgarian institutions would work together in the same way they collectively celebrate May 24, the country would be reborn.