time, i.e., when there is a vesperal Liturgy or no Liturgy at all. On days when the Liturgy may be celebrated at its usual hour, the Typica follows the sixth hour (or matins, where the custom is to serve the Liturgy then) and the Epistle and Gospel readings for the day are read therein; otherwise, on aliturgical days or when the Liturgy is served at vespers, the Typica has a much shorter form and is served between the ninth hour and vespers. Also, there are Inter-Hours for the First, Third, Sixth and Ninth Hours. These are services of a similar structure to, but briefer than, the hours. their usage varies with local custom, but generally they are used only during the Nativity Fast, Apostles Fast, and Dormition Fast on days when the lenten alleluia replaces "God is the Lord" at matins, which may be done at the discretion of the ecclesiarch when the Divine Liturgy is not celebrated. In addition to these public prayers, there are also private prayers prescribed for both monastics and laypersons; in some monasteries, however, these are read in church. These include Morning and Evening Prayers and prayers (and, in Russia, canons) to be prayed in preparation for receiving the Eucharist. The full cycle of services are usually served only in monasteries, cathedrals, and other . In monasteries and parishes of the Russian tradition, the Third and Sixth Hours are read during the Prothesis ( Liturgy of Preparation); otherwise, the Prothesis is served during matins, the final portion of which is omitted, the Liturgy of the Catechumens commencing straightway after the troparion following the Great Doxology. The Midnight Office is seldom served in parishes churches except at the Paschal Vigil as the essential office wherein the burial shroud is removed from the tomb and carried to the altar. Aggregates The sundry Canonical Hours are, in practice, grouped together into aggregates so that there are three major times of prayer a day: Evening, Morning and Midday. The most common groupings are as follows: Ordinary days Evening — Ninth Hour, Vespers, Compline Morning Watches — Midnight Office, Matins, First Hour Morning — Third Hour, Sixth Hour, and the Divine Liturgy or Typica Weekdays during lent Evening — Great Compline Morning Watches — Midnight Office, Matins, First Hour Morning — Third Hour, Sixth Hour, Ninth Hour, Typica, Vespers (sometimes with the Liturgy of the Presanctified Gifts or, on the