The official daily prayer of the Catholic Church is called the Liturgy of the Hours and is actually a set of prayers spoken at certain times of the day. The Liturgy of the Hours is more commonly called the Breviary.
The Breviary consists of five prayers, each corresponding to a time of day. The Office of Readings is a midnight prayer. The Morning Prayer, or Lauds, is intended to offer praise, whereas the Evening Prayer, or Vespers, is intended to offer thanks to God. Terce is a prayer for midmorning, Sext a prayer for midday and Non a prayer for midafternoon. These prayers can be said at 9 a.m., 12 p.m. or 3 p.m., depending on the circumstances of the person praying. The Compline is a prayer said just before sleep.
Each prayer has several parts, such as the opening verse, a Church-composed hymn, one or several psalms, the Lord's Prayer, a canticle and the concluding blessing. The Office of Readings can also include accounts of saints. Although adherents of Catholicism are encouraged by the Church to observe the Breviary, only members of the clergy are required to do so. Priests must recite all prayers of the Breviary, while deacons must only recite Lauds and Vespers.