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 Thursday (Songs of Experience) "reduced to misery". The "Holy Thursday" referred to in the poem is Ascension Thursday, which in the Church of England and other parts of the Anglican Communion, can be used a synonym for the same feast; Thomas Pruen uses the term to refer to Ascension Day in his "Illustration of the Liturgy of the Church of England", published in 1820; however use of the term "Holy Thursday" to mean Ascension Day is rare, and the term is more generally applied by most Christian denominations to Maundy Thursday in Holy Week. On Ascension Day a service was held in St. Paul's