Why Do Christians Worship on Sunday? Resurrection, the Lord’s Day, and Sabbath Rest

Why do Christians worship on Sunday instead of Saturday? In Part 1, we saw that the seventh-day Sabbath belonged to the Old Covenant mediated by Moses and given to Israel. In Part 2, we move from the covenantal foundation to the New Testament evidence. The resurrection of Jesus on the first day of the week, the worship pattern of the early church, and the fulfillment of the Sabbath in Christ all help explain why Christians gather on Sunday rather than Saturday. Table of contentsThe resurrection made the first day central for the New Covenant people of GodThe early church gathered on the first day of the week1 Corinthians 16:2 confirms the first-day patternThe Sabbath is de-emphasized in the New Testament after the GospelsColossians 2:16–17 says Sabbaths were shadows fulfilled in ChristRomans 14:5–6 shows that observance of days is not a binding church commandSunday is rightly called the Lord’s DayThe true and greater Sabbath is found in ChristConclusion The resurrection made the first day central for the New Covenant people of God Why did the first day become so important? Because that is the day Jesus rose from the dead. The phrase “first day of the week” occurs eight times in the New Testament, and six of those occurrences refer directly to Christ’s resurrection. Matthew 28:1, Mark 16:2, Mark 16:9, Luke 24:1, John 20:1, and John 20:19 all draw attention to the first day in connection with the risen Christ. That is not accidental. The New Testament repeatedly highlights the first day as the day of resurrection. This is important because the resurrection is not a minor event added onto the Christian faith. It is the triumph of Christ over sin, death, and the grave. If the Old Covenant was associated with the seventh day, it should not surprise us that the New Covenant would be marked by the day on which Christ rose and inaugurated the new creation reality His people now live in. Sunday became the fitting day for New Covenant worship because it is the day of resurrection. The early church gathered on the first day of the week The importance of the first day extends beyond the resurrection accounts. The book of Acts shows the early church gathering on that day. Acts 20:7 says, “On the first day of the week, when we were gathered together to break bread, Paul talked with them.” This gives us a clear picture of the gathered church meeting on Sunday. The reference to breaking bread is most naturally understood as communion in the context of corporate worship. Acts 2:42 supports this understanding by distinguishing fellowship from “the breaking of bread,” suggesting that it is more than an ordinary meal. This makes excellent theological sense. Communion looks back to Christ’s death and forward to His return, as 1 Corinthians 11:26 teaches. Since Christ rose on the first day of the week, it is fitting that the church gathered on that day to worship and remember Him. 1 Corinthians 16:2 confirms the first-day pattern Paul also wrote in 1 Corinthians 16:2, “On the first day of every week, each of you is to put something aside and store it up.” The most natural explanation is that Paul instructed believers to do this on the day they gathered together. This fits well with Acts 20:7 and reinforces the pattern of first-day worship in the early church. So the evidence is not only that Jesus rose on the first day. It is also that the early church assembled on the first day. That pattern is exactly what we would expect if the day of Christ’s resurrection had become the fitting day for New Covenant worship. The Sabbath is de-emphasized in the New Testament after the Gospels There is also an important contrast in emphasis. As your notes point out, the phrase “first day of the week” occurs eight times in the New Testament, but “seventh day of the week” never occurs. After the Gospels, the Sabbath is no longer emphasized as a binding Christian obligation. Why is the Sabbath mentioned so often in the Gospels? Because during Jesus’s earthly ministry, the Old Covenant order was still in place. Christ had not yet died and risen. The New Covenant had not yet been instituted. The transition had not yet occurred. But after Christ’s death and resurrection, the emphasis changes. When the Sabbath appears in Acts, it is associated with Jewish practice rather than with the church's gathered worship. That is a very important distinction. Colossians 2:16–17 says Sabbaths were shadows fulfilled in Christ One of the clearest passages on this subject is Colossians 2:16–17: “Therefore let no one pass judgment on you in questions of food and drink, or with regard to a festival or a new moon or a Sabbath. These are a shadow of the things to come, but the substance belongs to Christ.” This passage makes two truths unmistakably clear. First, believers are not to let anyone judge them regarding the Sabbaths. If seventh-day Sabbath observance were a binding New Covenant command for the church, that would be a very strange statement. Second, Paul says Sabbaths were a shadow. A shadow is not the final reality. It points forward to something greater. The substance, the fulfillment, belongs to Christ. That means the Sabbath had a temporary and typological role under the Old Covenant. It pointed beyond itself to Jesus. Once the reality has come, God’s people must understand the shadow in light of Him. Romans 14:5–6 shows that observance of days is not a binding church command Romans 14:5–6 says, “One person esteems one day as better than another, while another esteems all days alike. Each one should be fully convinced in his own mind.” Paul treats the observance of days as a matter of liberty, not law. That would be impossible if the church were required to keep the seventh-day Sabbath as a continuing covenant obligation. This fits perfectly with Colossians 2. The Sabbath is not treated as a moral command binding the church in the same way as commands against adultery, lying, or idolatry. The New Testament does not speak about Sabbath observance as a universal covenant requirement for believers under Christ. Sunday is rightly called the Lord’s Day Revelation 1:10 says, “I was in the Spirit on the Lord’s Day.” This most likely refers to Sunday, the first day of the week, which came to be known by that title because it is the day of the Lord’s resurrection. That title is fitting. The Sabbath was the sign day under the Old Covenant. The Lord’s Day is the resurrection day under the New Covenant. Sunday is not arbitrary. It is rooted in the finished work of Christ, the day He rose, and the worship pattern of the early church. The true and greater Sabbath is found in Christ This is where the lesson reaches its deepest theological point. Hebrews 4:9–10 says there remains a rest for the people of God. That rest is ultimately found in Christ. The Sabbath under the Old Covenant was a picture, a shadow, and a type. The reality is Jesus Himself. Jesus said in Matthew 11:28–30, “Come to me… and I will give you rest.” Christians do not say that there is no Sabbath principle at all. Rather, we say the true and greater Sabbath is fulfilled in Christ. We rest in His finished work. We stop striving to earn salvation. We trust Him. And we enjoy that rest not merely one day each week, but every day in Him. That gives a strong answer when someone asks, “Why don’t you keep the Sabbath?” A helpful response is this: “I keep the true and greater Sabbath by resting in Christ, and I gather with the church on Sunday because Jesus rose on the first day of the week.” That captures both the fulfillment of the Sabbath and the reason Christians worship on Sunday. Conclusion So why do Christians worship on Sunday instead of Saturday? Because the seventh-day Sabbath belonged to the Old Covenant mediated by Moses and given to Israel. Jesus instituted the New Covenant in His blood. Hebrews 7:12 explains that when the priesthood changed, the law-covenant order changed as well. Christ rose on the first day of the week, and the early church gathered on that day. Colossians says Sabbaths were shadows fulfilled in Christ, Romans says the observance of days is not a binding law for the church, and Hebrews says the true rest is found in Jesus. So the Old Covenant is associated with Moses and the seventh day. The New Covenant is associated with Jesus and the first day. That is why Christians worship on Sunday.