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 most notably, "The Pilgrimage of Etheria" (also known as "The Pilgrimage of Egeria"), which details the whole observance of Holy Week at that time. Today, in the Western Christian Church, among Lutherans, Anglicans, Methodists, Presbyterians and Catholics, the liturgies used for Holy Week are nearly identical. In the Moravian Church, the Holy Week services (Passion Week) are extensive, as the Congregation follows the life of Christ through His final week in daily services dedicated to readings from a harmony of the Gospel stories, responding to the actions in hymns, prayers and litanies, beginning on the eve of Palm Sunday and