The Royal Hours is a particularly solemn celebration of the Little Hours in the Eastern Orthodox and Eastern Catholic Churches. The Royal Hours is celebrated only three times a year: on the Eve of the Nativity, the Eve of Theophany, and Great Friday.
The members of the church chant verses of the bible which describes one powerful man's jealousy and fear during the service. This service takes its name from the fact that it used to be officially attended by the Emperor and his court at Hagia Sophia in Constantinople. Because of the presence of the Emperor, there was a special singing of "Many Years" to the Emperor, the Imperial Court, and the Hierarchy. This singing of "Many Years" continues to this day (in modified form) in cathedrals and monasteries. By his presence, the Emperor acknowledged his submission to Christ the true King.
The three holy days on which the Royal Hours are celebrated were chosen as days in the church year which most particularly demonstrate Jesus' kenosis (self-emptying), and thus His true royal majesty.
According to Sacred Tradition, the Royal Hours of Great Friday were composed by St. Cyril (378 - 444), Patriarch of Alexandria.
Although the Royal Hours are splendid, they are also penitential. On days when the Royal Hours are celebrated it is not permitted to celebrate the Divine Liturgy.
The Royal Hours is an aggregate of five services, all served together as one:
For the Royal Hours, the priest vests in Epitrachelion and Phelonion, and the deacon vests fully in Sticharion, Orarion and Epimanikia. The Holy Doors and Curtain are open for most of the service, and the Gospel Book is placed on an analogion (lectern) in the center of the Temple (church). At the beginning of each Hour the priest or deacon censes the Gospel, Icons and people.