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
Christian observances of Jewish holidays the week). However, Karaite Jews celebrate this holy day according to Scriptural mandate on the day after the Sabbath. This Sunday celebration, in Christian tradition, is calculated as 50 days after Easter (inclusive of Easter Day). In other words, it falls on the eighth Sunday, counting Easter Day. Pentecost celebrates the birth of the Church, when thousands of Jews were in Jerusalem to celebrate Shavuot, and heard Peter and the disciples speaking in their own language. However, Shavuot is one of the Three Pilgrimage Festivals laid out for the Torah observant Jews, which was the reason for the huge gathering