Pentecost commemorates the descent of the Holy Spirit upon the apostles fifty days after Easter (Acts 2:1-41). The name derives from the Greek pentekostos, 'fiftieth,' referring to the Jewish festival of Shavuot (the Feast of Weeks), which falls fifty days after Passover. The typological connection is deliberate and profound: as the Law was given at Sinai fifty days after the Exodus, so the Spirit was given fifty days after the Resurrection, writing the law on human hearts rather than tablets of stone (cf. Jeremiah 31:33, 2 Corinthians 3:3). The Christian observance of Pentecost is among the oldest feasts after Easter itself. Tertullian (De Baptismo 19, c. 200 AD) mentions Pentecost as a season particularly appropriate for baptism, suggesting it was already a significant liturgical occasion by the early third century. The Council of Elvira (c. 305) references the Pentecost season. Eusebius (Vita Constantini 4.64) records that Constantine was baptized at Pentecost. By the fourth century, the feast was universally observed across both East and West. The BCP 2019 lists Pentecost among the seven Principal Feasts — the highest liturgical rank — and the Day of Pentecost is one of the four traditional Ember Day anchors, when prayers are offered for those called to Holy Orders.

Pentecost carries a distinctive liturgical character shaped by its dual identity as both the culmination of Easter and its own feast. The color is red — for the tongues of fire (Acts 2:3) and for the Spirit's presence in the Church. In the medieval West, the custom of releasing doves or dropping rose petals from church ceilings dramatized the Spirit's descent; the French name for Pentecost, Pâques des Roses, recalls this practice. The sequence hymn Veni Sancte Spiritus ('Come, Holy Spirit'), attributed to Stephen Langton (c. 1200), became one of the most beloved Pentecost texts in Western Christianity. In the East, Pentecost is closely linked with the feast of the Holy Trinity, which the Byzantine tradition celebrates on the same day (the West assigns Trinity to the following Sunday). The Kneeling Prayers of Pentecost Vespers in the Byzantine rite mark the formal end of the Paschal season: the congregation kneels for the first time since Easter. The BCP 2019 provides two collects — the first emphasizing the Spirit's revelation of 'the way of eternal life to every race and nation,' the second (from the 1549 BCP) asking for 'a right judgment in all things.' The Old Covenant overlay is significant: Shavuot celebrates both the wheat harvest and the giving of Torah, and the Pentecost narrative in Acts deliberately echoes Sinai imagery — the sound of wind, the appearance of fire, the gathering of nations.

Barnabas was a Jewish Levite from Cyprus who appears first in Acts 4:36–37, selling a field and laying the proceeds at the apostles' feet. His name change from Joseph to Barnabas—which Luke translates as 'son of encouragement' (ho huios parakleseos)—suggests a man whose character so consistently embodied this quality that it became his identity. The Levitical background is significant: Levites had no territorial inheritance in Israel and were supported by the community, making his property sale a meaningful renunciation.

His most consequential act of encouragement was sponsoring Saul of Tarsus. When the newly converted persecutor came to Jerusalem, the disciples were terrified of him—with good reason, given his role in Stephen's murder and in persecuting the Church. It was Barnabas alone who brought Saul to the apostles and testified to the genuineness of his conversion, declaring that 'he had seen the Lord on the road, and that the Lord had spoken to him' (Acts 9:26–27). This endorsement proved pivotal: without Barnabas's vouching, the apostolic community might have rejected Paul, and the Gentile mission might have taken a radically different course.

When the church at Antioch grew rapidly and needed leadership (Acts 11:22–24), the Jerusalem apostles sent Barnabas to oversee it. Rather than claiming leadership for himself, Barnabas went to Tarsus, sought out Saul, and brought him to Antioch to share the work—effectively launching Paul's public ministry. It was at Antioch that the disciples were first called 'Christians' (Acts 11:26).

Barnabas and Paul traveled together on the first missionary journey (Acts 13–14), preaching through Cyprus and southern Asia Minor. At Lystra, after Paul healed a cripple, the crowds hailed Barnabas as Zeus and Paul as Hermes (Acts 14:11–12)—a striking reversal, suggesting Barnabas's commanding presence and perhaps his senior standing in their partnership at that point.

At the Council of Jerusalem (Acts 15), they testified together about God's work among the Gentiles, helping to secure the council's decision that Gentile converts need not be circumcised (15:12). But the partnership ended over John Mark, who had abandoned the first journey (Acts 13:13). Paul refused to take Mark again; Barnabas—characteristically—gave the young man a second chance and sailed with him to Cyprus (15:36–39). Paul's later acknowledgment vindicates Barnabas's judgment: 'Get Mark and bring him with you, for he is very useful to me' (2 Timothy 4:11).

Traditionally, Barnabas continued his ministry on Cyprus after parting from Paul and was martyred there. According to the fifth-century Acts of Barnabas, he was stoned by Jews from Salamis. The account reflects early Cypriot veneration of the apostle. According to medieval Cypriot tradition, Barnabas's remains were discovered near Salamis in 488 with a copy of the Gospel of Matthew on his chest—a discovery that the Church of Cyprus later cited to justify its claim to autocephalous status from the Council of Ephesus, as attested by the sixth-century historian Theodorus Lector.