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.

Tikhon was born in 1865 into an Orthodox Russian family. Ordained to the priesthood, he eventually became a bishop and was assigned as the Russian Orthodox Bishop of the Aleutians and North America from 1898 to 1907, during a crucial period of Orthodox missionary work in North America. During his tenure, Tikhon demonstrated remarkable openness to Episcopalian clergy and lay leaders, encouraging dialogue and cooperation between the Orthodox and Anglican communions. In 1917, following the Russian Revolution and the restoration of the patriarchate (which had been dormant since 1700), Tikhon was elected Patriarch of Moscow. In this capacity, he became the primary defender of Orthodox Christianity against Bolshevik ideology and Soviet state pressure. He was imprisoned multiple times, interrogated, and subjected to intense pressure to renounce his faith and his position. Despite these trials, he maintained his commitment to Orthodox Christianity and ecumenical witness. He died on April 7, 1925 (October 9 in the Orthodox calendar), under circumstances suggesting Soviet pressure and possible poisoning. The Russian Orthodox Church canonized him as a saint in 1989, recognizing his steadfast faith and martyrdom under persecution.

Tikhon is venerated in the Orthodox tradition as a confessor who endured persecution under communist atheism while maintaining fidelity to Orthodox Christianity and the patriarchate. His ecumenical outreach during his American episcopate is recognized as a significant moment in Orthodox-Anglican relations. He exemplifies Orthodox resistance to totalitarianism and the cost of faith under persecution. His canonization in 1989 marked the post-Soviet recognition of his holiness and martyrdom.