The Lord's Day
"On the evening of that day, the first day of the week..." (John 20:19). The resurrection happened on the first day of the week, and the early church gathered on the first day of the week. The Lord's Day is not merely a scheduling preference, it is the weekly proclamation that the seventh-day Sabbath rest of the old creation has been transformed by the eighth-day new creation of the risen Christ.
The First Day of the Week, Resurrection Day
All four Gospels locate the resurrection on the first day of the week (te mia ton sabbaton, the one/first of the Sabbaths): Matthew 28:1, Mark 16:2, Luke 24:1, John 20:1. The phrase itself is Jewish, counting the days from the Sabbath, but designates what the church would come to call Sunday.
The resurrection appearances cluster on the first day: Mary Magdalene at the tomb (John 20:1-18), the two disciples on the Emmaus road (Luke 24:13-35), the eleven in the upper room (John 20:19-23), and Thomas a week later ("eight days later", John 20:26, another first day). The coming of the Spirit at Pentecost was on Shavuot/Pentecost, itself a Sunday in Pharisaic reckoning.
John 20:19: "On the evening of that day, the first day of the week, the doors being locked where the disciples were for fear of the Jews, Jesus came and stood among them and said to them, 'Peace be with you.'" The first day of the week is the day of resurrection, of peace-greeting, of commission ("As the Father has sent me, even so I am sending you", 20:21), and of the Spirit-gift (20:22). The Lord's Day is, from the beginning, a day of resurrection life and apostolic commission.
Acts 20 and 1 Corinthians 16, First-Day Gathering
Acts 20:7: "On the first day of the week, when we were gathered together to break bread, Paul talked with them, intending to depart on the next day, and he prolonged his speech until midnight." The casual reference suggests the first-day gathering for breaking bread (the Lord's Supper) was the established pattern, not a special occasion. The Troas church gathers on the first day; Paul extends his teaching because he is leaving; the breaking of bread is the purpose and center of the gathering.
1 Corinthians 16:2: "On the first day of every week, each of you is to put something aside and store it up, as he may prosper, so that there will be no collecting when I come." Paul's instruction for the collection for the Jerusalem poor is keyed to the weekly first-day gathering, he expects the church to be assembling on the first day of every week. This is the financial logistics of an established worship rhythm.
Didache 14:1 (late first / early second century, the earliest Christian church order outside the New Testament): "On the Lord's Day of the Lord gather together, break bread and give thanks, after confessing your transgressions so that your sacrifice may be pure." The connection of "Lord's Day" to the first-day gathering, to the Eucharist, and to confession is established in this early source.
Revelation 1:10, Kuriake Hemera
"I was in the Spirit on the Lord's Day (kuriake hemera, κυριακῇ ἡμέρᾳ), and I heard behind me a loud voice like a trumpet" (Revelation 1:10). This is the only use of the phrase "Lord's Day" (kuriake hemera) in the New Testament, the adjective kuriake (belonging to the Lord, the Lord's) applied to hemera (day).
The same adjective is used in 1 Corinthians 11:20 for the "Lord's Supper" (kuriakon deipnon). The Lord's Day and the Lord's Supper share the same possessive: both belong to the risen Lord. The day is not merely a day on which the Lord rose; it is the day that is his, the day marked by his resurrection, the day of his people's gathering.
John receives the Apocalypse on the Lord's Day: the visions of the risen and exalted Christ (Revelation 1:12-20), the letters to the seven churches (2-3), and the entire throne-room vision (4-5) are given on the resurrection day. The Lord's Day is the day of eschatological vision, the day when the church most clearly sees the risen Christ and the coming Kingdom.
The Eighth Day, New Creation Theology
The early church developed a theology of the Lord's Day as the eighth day. The Sabbath is the seventh day, the completion of the old creation. The first day of the week is both the first day (beginning of the new week) and the eighth day (one beyond the completed seven of the old order), the day of new creation.
Barnabas 15:8-9 (late first / early second century): "We celebrate with joy the eighth day on which Jesus also rose from the dead, was made manifest, and ascended into heaven." The resurrection day transcends the old creation's seven-day cycle. The Sabbath looks back to creation; the Lord's Day looks forward to new creation.
Justin Martyr (c. 155 AD, First Apology 67): "And on the day called Sunday, all who live in cities or in the country gather together to one place, and the memoirs of the apostles or the writings of the prophets are read... Sunday is the day on which we all hold our common assembly, because it is the first day on which God, having wrought a change in the darkness and matter, made the world; and Jesus Christ our Savior on the same day rose from the dead." Justin connects Sunday to both protology (first-day creation of light) and eschatology (resurrection).
The Lord's Day is thus the day the church inhabits the overlap of the ages: the seventh-day Sabbath rest of the old creation is not abolished but fulfilled, the one who is Lord of the Sabbath (Mark 2:28) rises on the eighth day and inaugurates the endless day of the new creation (Revelation 21:22-25: "the city has no need of sun or moon... the Lamb is its lamp... there will be no night there").
The Lord's Day in the Sanctum
The Sanctum reads the Lord's Day as the weekly re-enactment of the resurrection: the church gathers on the day of new creation to break bread, hear the word, confess, and proclaim the risen Lord. The eighth-day theology connects every Sunday gathering to the eschatological new creation, the church inhabiting the overlap of the ages, living in the light of the risen Christ until the day when there is no more night.
Ask Dave About the Lord's Day
Dave holds the full biblical theology of the Lord's Day, the resurrection on the first day of the week in all four Gospels, Acts 20:7 first-day breaking of bread, 1 Corinthians 16:2 weekly collection, Revelation 1:10 kuriake hemera (the Lord's adjective = same as kuriakos deipnon in 1 Cor 11:20), the eighth-day/new-creation theology from Barnabas and Justin Martyr, and the eschatological frame of the Lord's Day as the overlap of the ages.
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