The descent of the Holy Spirit upon the Apostles fifty days after Pascha, marking the full revelation of the Holy Trinity and the beginning of the Church's mission in the world. During Vespers, special kneeling prayers are offered and the church is adorned with greenery. This feast celebrates the completion of Christ's saving work and the outpouring of the Holy Spirit upon all believers. From this day forward, the Sundays of the year are numbered from Pentecost, signifying the continual life and growth of the Church in the grace of the Spirit.

A brief night prayer service traditionally celebrated at midnight, anticipating the coming of Christ as the Bridegroom. Also called Mesonyktikon, this service includes psalms that speak of watching and waiting for the Lord, particularly Psalms 50 and 118. The Midnight Office emphasizes spiritual vigilance and the need to be always ready for Christ's return. In monastic communities, it is celebrated between Compline and Matins. The service includes the Creed and often commemorates the departed.

The central worship service of the Orthodox Church, celebrating the Eucharist (Holy Communion). Usually celebrated on Sundays and feast days, the Divine Liturgy consists of the Liturgy of the Word (scripture readings) and Liturgy of the Faithful (Eucharistic prayer and communion). The most common forms are the Liturgies of St. John Chrysostom and St. Basil the Great.

The evening prayer service of the Orthodox Church, traditionally celebrated at sunset. Vespers includes psalms, hymns, scripture readings, and incense. On Saturday evenings, Great Vespers is often combined with the Sunday Divine Liturgy. The service marks the end of the liturgical day and prepares the faithful for rest and reflection.

A brief evening prayer service traditionally said before sleep. Compline includes psalms asking for God's protection through the night and prayers for peaceful rest. During Great Lent, Great Compline is celebrated with additional prayers and the beautiful Canon of St. Andrew of Crete. The service emphasizes trust in God's care during our vulnerable hours of sleep.

The morning prayer service of the Orthodox Church, traditionally celebrated at dawn. Also called Orthros in Greek tradition, this service includes the reading of the Gospel, the Great Doxology, and numerous psalms and hymns. Matins prepares the faithful for the day and is often celebrated immediately before the Divine Liturgy on Sundays and feast days.

The 19th-20th century Russian priest known for his pastoral care and miraculous healings. Celebrated on December 20th, John served in Kronstadt for over 50 years, offering daily liturgy and caring for the poor. His spiritual diary 'My Life in Christ' reveals deep mystical insights. He represents dedicated pastoral ministry and social service.

A lengthy service combining Vespers and Matins, traditionally celebrated on the eve of Sundays and major feasts. The All-Night Vigil includes the singing of "Lord, I Call," the Magnificat, the Great Doxology, and numerous psalms and hymns. This service prepares the faithful spiritually for the upcoming feast.

A miraculous icon of the Theotokos known for comforting the afflicted and healing the sick. Celebrated on November 6th, this icon shows the Virgin Mary surrounded by angels distributing aid to various people in distress. Many miracles have been attributed to prayer before this icon, especially healing from illness and comfort in grief.

The brother physicians who provided free medical care and were martyred under Diocletian. Celebrated on November 1st, these 'Unmercenary Healers' treated both physical and spiritual ailments without accepting payment. They are patron saints of physicians and pharmacists. Their example shows how professional skills can be a form of Christian ministry and service.

The commemoration of the Archangel Michael and all the bodiless powers (angels) on November 8th. This feast celebrates the angelic hierarchy and Michael's role as leader of God's army against evil. Orthodox tradition honors angels as God's messengers and guardians, with Michael being especially venerated as protector of the Church and individual Christians.

The Archbishop of Constantinople known as the 'Golden-Mouthed' for his eloquent preaching. Celebrated on November 13th, Chrysostom wrote the Divine Liturgy used most frequently in Orthodox churches. His biblical commentaries and moral teachings, along with his care for the poor, made him one of the greatest Church Fathers.

One of the twelve apostles, called directly by Jesus in Galilee. Celebrated on November 14th, Philip brought Nathanael to Christ and questioned Jesus about feeding the five thousand. He preached in Asia Minor and was martyred in Hierapolis. He represents thoughtful faith and bringing others to encounter Christ.

The 14th-century Archbishop of Thessalonica who defended hesychast spirituality and taught about the uncreated energies of God. Celebrated on the Second Sunday of Lent, Palamas developed theological foundations for mystical prayer and the Jesus Prayer tradition. His teachings on theosis (deification) are central to Orthodox spiritual life.

The celebration of Christ's birth in Bethlehem. The feast is preceded by a 40-day Nativity Fast and celebrated with the Divine Liturgy, special hymns like the Troparion of the Nativity, and the blessing of homes.

Brief prayer services traditionally celebrated at specific times of day: First Hour (6 AM), Third Hour (9 AM), Sixth Hour (noon), and Ninth Hour (3 PM). Each Hour includes psalms, troparia, and prayers appropriate to that time of day. These services sanctify the day and connect us to Christ's Passion, as they commemorate specific moments in His crucifixion and death.

The physician and evangelist who wrote the Gospel of Luke and Acts of the Apostles. Celebrated on October 18th, Luke was a companion of Paul and is patron of doctors and artists. His Gospel emphasizes Christ's compassion for the poor and outcast. He's traditionally credited with painting the first icon of the Theotokos.

The presentation of the three-year-old Virgin Mary in the Temple by her parents, Saints Joachim and Anna. Celebrated on November 21st, this feast honors Mary's dedication to God and her preparation for her role as Theotokos. According to tradition, Mary was raised in the Temple until her betrothal to Joseph.