The Sofia Municipality and Bulgaria’s Ministry of Education and Science are organizing a festive procession and a solemn ceremony on occasion of the Day of Bulgarian Culture and Slavonic Script-May 24. Bulgaria’s President Rossen Plevneliev and Sofia Mayor Yordanka Fandakova are to hold speeches on that day. May 24 was declared a national holiday back in 1990. The day dedicated to the holy deed of brothers Cyril and Methodius who created the Cyrillic alphabet, was marked for the first time at the eparchial school St. St Cyril and Methodius in the city of Plovdiv on May 11, 1851 at the initiative of Bulgarian linguist, folklorist and public figure Nayden Gerov. After the introduction of the Gregorian Calendar on April 1, 1916, Bulgaria started to celebrate that feast on May 24. In 1969 the church calendar was separated from the secular calendar. Thus the Orthodox Church started to mark the day of St. St. Cyril and Methodius on May 11 and the secular holiday is marked on May 24.