An akathist (Greek, akathistos) is a hymn dedicated to a saint, holy event, or one of the persons of the Holy Trinity. The word akathist itself means "not sitting." The akathist par excellence is that written in the 6th century to the Theotokos. In its use as part of the Salutations to the Theotokos service (used in the Byzantine tradition during Great Lent), it is often known by its Greek or Arabic names, Chairetismoi and Madayeh, respectively.
The writing of akathists (occasionally spelled acathist) continues today as part of the general composition of an akolouthia, especially in the Slavic tradition, although not all are widely known nor translated beyond the original language. Isaac E. Lambertsen has done a large amount of translation work, including many different akathists. Most of the newer akathists are pastiche, that is, a generic form imitating the original 6th century akathist into which a particular saint's name is inserted.
Compline (Greek: Apodeipnon; Slavonic: Povocherniya; literally, "after-supper" prayer) is a service of prayers and psalms read after dinner and following Vespers.
The Divine Liturgy is the primary worship service of the Church. The most commonly celebrated forms of the Divine Liturgy are the Liturgy of St. John Chrysostom, the Liturgy of St. Basil, and the Liturgy of the Presanctified Gifts, but there are other extant liturgies, such as the Liturgy of St. James, the Liturgy of St. Mark, the Liturgy of St. Gregory the Great, and the Liturgy of St. Tikhon of Moscow. The Divine Liturgy is a eucharistic service. It contains two parts: the Liturgy of the Catechumens, sometimes called the Liturgy of the Word, at which the Scriptures are proclaimed and expounded; and the Liturgy of the Faithful, sometimes called the Liturgy of the Eucharist, in which the gifts of bread and wine are offered and consecrated. The Church teaches that the gifts truly become the body and blood of Jesus Christ, but it has never dogmatized a particular formula for describing this transformation. The Prothesis (or Proskomedia), the service of preparing the holy gifts, can be considered a third part which precedes the Liturgy proper.
Matins (also spelled Mattins, from the Latin, matutinae, "morning"), also called Orthros (from Greek, meaning "morning", "dawn" or "day break"), is the longest and most complex of the daily cycle services. Matins is celebrated in the morning, unless it is celebrated as part of a vigil in the evening.
The Liturgy of the Presanctified Gifts, informally the Presanctified Liturgy, is a liturgical service for the distribution of the Holy Gifts on the weekdays of Great Lent.
Vespers (εσπερινός) is first service of the Daily Cycle of divine services celebrated in the Orthodox Church. Because the liturgical day begins at sunset, Vespers is traditionally served in the early evening. For many parishes, Vespers is the principal evening service. */ -->