Constantine-Cyril and Methodius created the Glagolitic alphabet in 855 AD to translate religious texts into Old Slavonic. They helped spread Christianity and education among Slavic peoples. In Bulgaria, they established schools and trained over 3,500 priests and teachers. Today in Bulgaria, May 24th is celebrated annually as the Day of Bulgarian Education, Culture, and Slavic Literature to honor their historical contributions in creating the Cyrillic alphabet and translating the Bible. At St. Kliment Ohridski Primary School, students and teachers decorate the school and participate in activities like making wreaths, poems, and artwork to commemorate Cyril and Methodius on this national holiday.