Maundy Thursday April 22 inclusive, but these dates fall on different days depending on whether the Gregorian calendar or Julian calendar is used liturgically. Eastern churches generally use the Julian calendar and celebrate this feast throughout the 21st century between April 1 and May 5 in the more commonly used Gregorian calendar. The liturgy held on the evening of Maundy Thursday initiates the Easter Triduum, the period which commemorates the passion, death, and resurrection of Jesus; this period includes Good Friday and Holy Saturday, and ends on the evening of Easter. The Mass of the Lord's Supper or service of worship is
Holy Week On this day a special service called "The Unction of the Sick" is conducted. It consists of seven prayers and at the conclusion of the prayers, the priest anoints each member of the congregation with the holy oil. The following day – the last Saturday before Holy Week – is called "Lazarus' Saturday". On this day the Coptic Church commemorates Lazarus, the brother of Martha and Mary of Bethany. This day is related to the events of Holy Week in that John 12 tells of a visit of Jesus to Lazarus immediately before recounting the events of Palm Sunday. Since