![Cyril and Methodius](http://www.ststeve.com/wp-content/uploads/2015/03/Cyril-methodius-small-226x300.jpg)
Saints Cyril and Methodius holding the Cyrillic alphabet, a mural by Bulgarian iconographer Z. Zograf, 1848, Troyan Monastery
¶ The observance of March 9 as the feast day dates to the 1584 Martyrology issued after the Council of Trent. More pertinent dates are February 14 (the date of the death of Cyril in 869; Methodius died on 6 April 885). The observance in the Orthodox church is May 11 Old Style, commemorating the “Day of the Bulgarian Script” (or May 24, using the Gregorian calendar instead of the Julian calendar).