For the Orthodox Christian, Holy Week is the week from the conclusion of Great Lent on the Saturday of Lazarus to the celebration of the Great and Holy Pascha, the Resurrection of Our Lord and Saviour, Jesus Christ. This week is also often called the Great and Holy Week.
While little is recorded of the development of the celebrations of the Holy Week during the early years of the Church, it apparently had very early origins. By the fourth century the celebration of the week appears well founded and to be similar to our celebrations today. The pilgrim Aetheria to Jerusalem in the latter part of the fourth century described the events of the week after the services of Saturday of Lazarus, “...began the week of the Pasch, which they called here the Great Week