the Twelve Apostles. Day of the Holy Spirit The Monday of the Holy Spirit, also called Whit Monday or Pentecost Monday, falls on the day after Pentecost Sunday. This day commemorates the Holy Spirit's role in the feast of Pentecost. Churches named after the Holy Spirit and, in Western Christianity, those named after the Holy Trinity, commemorate their feast on this day (In Eastern Christianity, churches named after the Holy Trinity, commemorate their feast on Pentecost Sunday). All Saints Sunday The First Sunday After Pentecost is dedicated to the commemoration of All Saints. The next day (Monday) is the beginning of the Apostles' Fast. This is a unique fast in that it is of variable duration, beginning on the moveable calendar, but ending on the fixed calendar feast day of the Apostles Peter and Paul on June 29 (for those churches which follow the Julian Calendar June 29 falls on July 12 of the modern Gregorian Calendar). While all of the Orthodox Churches celebrate Pascha on the same day (with the exception of the Finnish Orthodox Church, which follows the Western Paschalion), some churches follow the traditional Julian Calendar ("Old Calendar") and some follow the Revised Julian Calendar ("New Calendar") which uses the modern Gregorian Calendar to calculate their fixed feasts. Since there is currently a difference of thirteen days between the two calendars, the Apostles' Fast will be almost two weeks shorter for New Calendar churches, or in some years non-existent. All Saints of Local Church All-Saints of Local Commemoration. This will differ from one national church to another. For instance, in Romania, the commemoration will be "All Saints of Romania", on Mount Athos the commemoration will be "All Saints of the Holy Mountain", etc. In the Orthodox Church of America, the commemoration is "All Saints of America". Different traditions In the edition of the Pentecostarion used by the Old Believers and those who follow the Ruthenian recension, the contents of the Pentecostarion begin with the service of Palm Sunday and contain the services of Holy Week. See also Paschal cycle Triodion — the Lenten Triodion, for services of the moveable cycle prior to the Pentecostarion Notes References External links Complete original text in the Greek language, Retrieved 2013-08-10 Complete text in the Church Slavonic language, Retrieved 2013-08-10 Sundays and some other days' texts in the English language, Retrieved 2013-08-10 Eastern Orthodox liturgical days Pentecost Eastertide Eastern Orthodox liturgical