What are the different forms of Liturgies in the Byzantine Church?
There are three Liturgies, each connected with the name of a saint. The Liturgy of St. Basil the Great is offered on the Sundays of Lent, Holy Thursday, Holy Saturday, the eves of Christmas and Theophany, and on January 1st (his feast). The Liturgy of St. John Chrysostom is used during the rest of the year. During Lent, the Liturgy of St. Gregory of Rome is often celebrated. This is not a true Liturgy, but a service of prayer during which the Eucharist, already consecrated, is distributed. It is also called the Liturgy of the Presanctified Species.