Easter is the feast of the Resurrection of Jesus Christ from the dead — the oldest, highest, and most central celebration of the Christian year. Every other movable feast and fast is calculated from it; every Sunday is a weekly Easter. The date is determined by the Paschal computation established at the Council of Nicaea (325): Easter falls on the first Sunday after the first full moon on or after the vernal equinox (March 21), placing it between March 22 and April 25. The earliest Christians appear to have observed an annual Pascha from a very early period, though the precise origins are debated. The Quartodeciman controversy of the second century — whether to celebrate the Pascha on Nisan 14 (regardless of the day of the week) or always on a Sunday — attests that the observance was already widespread and deeply important by the mid-100s. Polycarp of Smyrna reportedly discussed the matter with Anicetus of Rome around 155 (Eusebius, HE 5.24), and the issue was sharp enough to prompt Victor of Rome to threaten excommunication of the Asian churches, a threat moderated by Irenaeus's famous appeal for peace. The Nicene resolution in favor of the Sunday observance became universal in the mainstream Church, though some groups maintained the Quartodeciman practice for centuries. The Great Vigil of Easter is among the most ancient liturgies in Christianity, with roots traceable to at least the third century (Apostolic Tradition). By the fourth century, Egeria describes an elaborate Jerusalem vigil with baptisms, and Augustine attests a similar pattern in North Africa.

The Great Vigil, which the BCP 2019 describes as 'the first liturgy of Easter Day,' begins in darkness. The Paschal Candle is lit from new fire — a symbol of Christ as the light of the world entering the darkness of the tomb. The Exsultet, the great hymn of praise to the Paschal Candle, is among the most magnificent pieces of Christian hymnody, attested from at least the fourth century (Ambrose may have composed an early version). The vigil readings trace salvation history from creation through the Exodus to the prophets, building to the proclamation of the Resurrection Gospel. Historically, the Vigil was the primary occasion for baptism — new Christians dying and rising with Christ through the waters, emerging to receive their first Eucharist on the night of the Resurrection. The BCP 2019 provides for baptism or renewal of baptismal vows at the Vigil. The Easter morning liturgy opens with the Paschal greeting: 'Alleluia! Christ is risen! / The Lord is risen indeed! Alleluia!' — a form attested across virtually every Christian tradition. The fifty days of Eastertide that follow (through Pentecost) are treated as a single unbroken feast — no fasting, no kneeling for prayer, Alleluias throughout. Easter eggs, the custom of which is documented from at least the thirteenth century, symbolize the sealed tomb and new life breaking forth. Easter is not a day but a season.

John Donne was born in 1572 into a prominent Catholic family during the Elizabethan penal period. His mother was descended from the More family (John More's niece); his uncle was a Jesuit missionary. This Catholic inheritance—intellectual, spiritual, and dangerous—shaped his entire life. He was educated at Hart Hall, Oxford, and Lincoln's Inn, London, studying law and languages. In his youth he was a courtier, wit, and writer of erotic poetry (songs, satires) that circulated in manuscript among the literary elite.

At age nineteen he may have secretly married Ann More, ward of Sir George More; the marriage was acknowledged around 1601 and sundered his legal prospects. His most productive years (1600s–1610s) saw him in poverty and professional limbo, dependent on patronage. During this period he composed many of his Holy Sonnets (c. 1609–1611)—wrestling with faith, guilt, sexuality, and death—and his metaphysical love poetry.

In 1610 he published Pseudodoxia (a theological treatise) and began to secure patronage. A turning point came in 1615 when, at age forty-two and in financial desperation, he sought ordination in the Church of England. King James I, impressed by Donne's learning, encouraged him. He was ordained and rapidly rose in the Church: appointed chaplain to the king, then (1621) Dean of St. Paul's, one of the most prestigious ecclesiastical posts in England.

As dean (1621–1631), Donne preached an estimated 160 sermons, many surviving in print. These sermons—delivered from the famous Paul's Cross pulpit and in the Cathedral—combined learning (biblical, patristic, legal), innovation (vivid imagery, dramatic rhetoric), and theological depth. In 1624, seriously ill, he wrote his Devotions Upon Emergent Occasions, a sequence of twenty-three meditations, expostulations, and prayers following the course of a grave fever. This work, published posthumously in 1624, stands with the Preces Privatae as a masterpiece of Stuart devotional literature. Donne died on March 31, 1631, and was buried in St. Paul's; his last sermon, 'Death's Duel,' was preached the month before his death.

Donne had no medieval cult or formal canonization. His reputation rested entirely on his literary achievement and preaching fame during his lifetime. After his death, his works went through cycles of recovery and eclipse. The seventeenth and eighteenth centuries valued his sermons more than his poetry; the poetry was largely forgotten until nineteenth-century revival (T.S. Eliot's 1921 essays on metaphysical poetry resurrected Donne's literary reputation). Modern Anglo-Catholicism reclaimed him as a figure of integration—poet-priest, wit and saint, passionate and learned. His Devotions has been continuously reprinted and remains a standard spiritual text. His inclusion in Anglican calendars dates to nineteenth-century revival of saint commemoration and reflects modern rather than unbroken tradition. The Holy Sonnets, published posthumously (1633) and long attributed to his youth, are now recognized as written in middle age during spiritual crisis, making them central to understanding his conversion and faith.