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
Royal Maundy religious training. Henry's son, Edward I, was the first monarch to keep the Maundy only on or about Maundy Thursday; before Edward, additional Maundys might be kept during the year. According to Virginia Cole in her study of royal children's role in the 13th century Maundy, the service had a political purpose as well, as needing to humble himself by doing the "pedilavium" proclaimed the monarch's greatness. Attendance at a Maundy service became an obligation for all major European ruling houses. By 1363 the English monarch performed the "pedilavium" and also gave gifts: that year, fifty-year-old Edward III gave fifty