The Feast of Holy Pentecost is celebrated each year on the fiftieth day after the Great and Holy Feast of Pascha (Easter) and ten days after the Feast of the Ascension of Christ. A Feast to commemorate the descent of the Holy Spirit upon the Apostles on the day of Pentecost. Also a day to celebrate the establishment of the Church through the preaching of the Apostles and the Baptism of thousands who on that day believed in the Gospel message os salvation through Jesus Christ. It is on this day that they also remember the culmination of the revelation of the Holy Trinity.
Orthodox Christians celebrate this Great Feast with the Divine Liturgy of Saint John Chrysostom. The Liturgy is conducted on the day of the Feast and is preceded by the evening before by a Great Vespers and earlier on the day with Matins. The Vespers service includes kneeling prayers to mark the beginning of the practice of kneeling during Liturgy when the holy gifts of bread and wine are consecrated. Kneeling was suspended during the Paschal season. The following day, the Monday, the Divine Liturgy is conducted in commemoration of the All Holy, Life Creating and All Powerful Spirit – God, one of the Trinity.