The Common Hours of Prayer of the Armenian Apostolic Church English Translation (The Singing of the Hours) - Hardcoverby Gregory Richard Eritzian (Author), Anastasia Ava Eritzian (Artist) "The Common Hours of Prayer of the Armenian Apostolic Church English Translation (The Singing of the Hours)" is the Breviary of the Armenian Apostolic Church. It is known as the "Zhamerkootyoon" in Armenian. Comprising of Psalms, Prayers, Hymns, and Bible readings it makes up the very ancient daily hours of prayer performed in the Armenian Apostolic Church at their prescribed times