Holy Saturday is the day of Christ's rest in the tomb — the only day in the Christian year when the Church contemplates the reality that God the Son lay dead and buried. It is the third day of the Paschal Triduum, spanning from the evening of Good Friday to the lighting of the Paschal Candle at the Easter Vigil. Like Good Friday, no Eucharist is celebrated on Holy Saturday itself; the altar remains bare. The theological significance of this day was developed early. The Apostles' Creed's affirmation that Christ 'descended to the dead' (descendit ad inferos) finds its liturgical home here. The tradition of Christ's descent — variously called the Harrowing of Hell, the Descensus, or the Anastasis — is rooted in 1 Peter 3:18-20 and 4:6, amplified by early patristic reflection. An ancient homily attributed to the second century (sometimes called the 'Ancient Homily on Holy Saturday,' preserved in the Liturgy of the Hours) dramatically narrates Christ descending to the realm of death to liberate Adam and Eve: 'Arise, let us leave this place. The enemy led you out of the earthly paradise. I will not restore you to that paradise, but I will enthrone you in heaven.' The BCP 2019 provides two collects for this day: one focusing on the entombment and the hope of the third day, the other on the descent to the dead.

Holy Saturday is characterized by silence, waiting, and theological paradox. The Church holds a kind of cosmic Sabbath — God resting from the work of redemption as God once rested from the work of creation. The Byzantine tradition makes the most of this paradox, with icons of the Anastasis (Resurrection) that depict Christ standing on the shattered gates of Hades, pulling Adam and Eve from their tombs, even as his own body lies in the grave above. This icon is, notably, the Eastern Church's primary Resurrection image — not the empty tomb, but the harrowing of the dead. In the West, the day is marked by quiet preparation. The Easter Vigil, which begins after nightfall, is technically the first liturgy of Easter Day and belongs to the Resurrection rather than to Holy Saturday. The BCP 2019 makes this distinction explicit: the Vigil is listed under Easter rather than Holy Saturday. The hours before the Vigil are a genuine liturgical void — the Church waits, as the disciples waited, not yet knowing what the morning will bring. The ancient baptismal connection is strong: Holy Saturday was historically the final day of preparation for catechumens who would be baptized at the Vigil, their passage through water mirroring Christ's passage through death.

The earliest evidence for a March 25 Annunciation feast comes from sixth-century Constantinople (c. 555, under Justinian I). In the Latin West, the Sacramentary of Pope Gelasius (d. 496) and the Sacramentary of Pope Gregory (d. 604) mention it, though scholars debate whether the feast originated in their time or later. The first certain reference is the 656 Council of Toledo, which describes the feast as 'celebrated throughout the church.' The Spanish Church initially observed the Annunciation on December 18 rather than March 25, and the tenth Synod of Toledo (656) confirmed this local usage.

The Quinisext Council (Constantinople, 692) allowed the Annunciation as an exception to the rule against feast days during Lent — a concession reflecting the feast's importance and the practical tension between its fixed March 25 date and the moveable Lenten calendar. Modern Western practice transfers the feast when it falls in Holy Week or Easter Week.

The relationship between March 25 and December 25 is fundamental. The Calculation Hypothesis holds that early Christians identified March 25 as both the date of Christ's death and his conception (following a Jewish tradition that great persons die on the date of their conception or birth). Nine months from March 25 yields December 25. Whether the Annunciation date generated the Christmas date or vice versa remains debated, but the theological logic is clear: the Incarnation is a single mystery whose beginning (conception) and manifestation (birth) are intimately linked.

In England, March 25 was known as Lady Day and served as the legal New Year from 1155 to 1752, when the Gregorian calendar moved the new year to January 1. Lady Day was the first of four English Quarter Days (with Midsummer, Michaelmas, and Christmas), marking when agricultural contracts began and rents were due. The theological symbolism was intentional: the year began where the story of salvation began, with the Word becoming flesh.

Irenaeus of Lyons (c. 180) developed the foundational New Eve theology: 'The knot of Eve's disobedience was untied by Mary's obedience.' Just as death entered through a woman's 'no' to God's design, salvation entered through a woman's 'yes.' This patristic theme — Mary as the faithful counterpart to faithless Eve — became central to Christian reflection on the Annunciation across all traditions.