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.

Thomas Ken was born in 1637 at Little Berkhamsted, Hertfordshire, the son of a Protestant gentry family. He attended The King's School, Canterbury, and later Winchester College, then studied at New College, Oxford, where he developed a reputation for theological acumen and piety.

After his ordination, Ken held various church positions, serving as a chaplain and parish minister. In 1679, he became chaplain to Mary of Modena, the Catholic queen of James II, but his unwavering Anglican principles and personal integrity earned him respect even in that delicate position. He refused to compromise the Church's doctrine despite the royal court's proximity to Catholicism.

In 1685, Ken was elevated to the bishopric of Bath and Wells, a position of considerable importance in the English hierarchy. He remained bishop for only three years before the Glorious Revolution of 1688 transformed the English religious and political landscape. When William III and Mary II ascended the throne as joint monarchs, they required all clergy to swear an oath of allegiance to the new sovereigns.

Ken, along with six other bishops, refused to take the oath to William III, maintaining his prior oath to James II as a matter of conscience and principle. This act of non-juror steadfastness cost him his bishopric, his income, and his freedom of movement. He spent his final years in relative poverty and obscurity, first living quietly at Longleat House, then on the Isle of Man (briefly imprisoned), and finally in small rooms in London. He died in 1711, unreconciled to the new regime.

Ken was a skilled theologian and prolific writer of devotional works, sermons, and—most enduringly—hymns. His two hymns, composed in the 1690s, were intended to frame the Christian day: the morning hymn 'Awake my soul and with the sun' and the evening hymn 'All praise to thee my God this night' became canonical in Anglican practice.

Thomas Ken developed no formal cult but became an emblematic figure for the non-juror cause and later for Anglo-Catholic and High Church traditions that valued conscience and principle over mere political pragmatism. His refusal to swear allegiance to William III, despite enormous personal cost, made him a martyr-confessor of principle—suffering not violent death but exile, deprivation, and lifelong poverty for fidelity to his oath. In the nineteenth century, the Oxford Movement and Anglo-Catholic revival recovered his figure as an exemplar of apostolic fidelity and ecclesiastical integrity. However, his commemoration in modern Anglican tradition is primarily through his hymns, which became canonical in Prayer Book services. His hymns frame the Christian day and remain among the most valued in English hymnody. Unlike more overtly hagiographic traditions, Ken's veneration rests on the enduring value of his spiritual compositions and on historical admiration for his conscientious stand, rather than on miraculous claims or a developed cult.