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
Last Supper the 1912 Catholic Encyclopedia. The Maundy Thursday church tradition assumes that the Last Supper was held on the evening before the crucifixion day (although, strictly speaking, in no Gospel is it unequivocally said that this meal took place on the night before Jesus died). A new approach to resolve this contrast was undertaken in the wake of the excavations at Qumran in the 1950s when Annie Jaubert argued that there were two Passover feast dates: while the official Jewish lunar calendar had Passover begin on a Friday evening in the year that Jesus died, a solar calendar was also used,