Orthros is the service with which the Church greets the day. Its name is the Greek word for early dawn, and its prayers move from the dark toward the light: it begins with the Six Psalms, read in quiet, and on Sundays and feasts it ends in praise, with the Great Doxology, "Glory to God in the highest".
In between lie the psalms, litanies, and hymns that change with the day and the season, drawn from the Church's books of the week and of the saints. At its heart stands the canon, a long hymn in odes, and on Sundays the reading of one of the Gospels of the Resurrection. Served in full it is long; in parish use it is usually shortened.
Orthros is not the Liturgy. It is a service of prayer and praise, with no Eucharist. When it is served differs by tradition. In Greek parish practice it is served on Sunday and feast-day mornings, straight before the Divine Liturgy. In the Russian tradition it is part of the All-Night Vigil, served on Saturday evening and on the eve of great feasts.

