Every year on May 24, all Slavic countries celebrate the Day of Slavic Literature and Culture and solemnly glorify the creators of the Slavic script, Saints Cyril and Methodius, the Slovenian teachers. As is known, the holy Equal-to-the-Apostles brothers Cyril and Methodius came from a noble and pious family and lived in the Greek city of Thessalonica.
On May 24, the Church commemorates the holy Equal-to-the-Apostles brothers Cyril and Methodius. The brothers were Orthodox monks and created the Slavic alphabet in a Greek monastery.
Scholars believe that Slavic writing was created in the 9th century, around 863. The new alphabet was called "Cyrillic" after one of the brothers, Konstantin, who, having taken monasticism, became Cyril. And his elder brother Methodius helped him in the charitable work of educating the Slavic peoples.