Today many Christians think that the Lord’s Day or the Day of the Lord (God) is Sunday. And they have worship services on Sunday. However, this custom is directly against the teachings of God or Jesus Christ in the bible.
When is the Lord’s Day or the Day of the Lord? To justify their argument that the Lord’s Day is Sunday, many people quote from the Book of Revelation.
Revelation 1:10 On the Lord’s Day I was in the Spirit, and I heard behind me a loud voice like a trumpet
Can this verse prove that the Day of the Lord is Sunday? No. Even though you read the whole context, we cannot know when the Lord’s Day is by looking at this verse because this verse and its context does not specify when the Lord’s Day is.
Then when is the Lord’s Day according to the teachings of God in the bible? The bible teaches the Lord’s Day is the Sabbath that is Saturday according to today’s calendar.
The Lord’s Day in the Old Testament
In Genesis we can see God’s creation work. God worked for six days and He took rest on the seventh day. God set the seventh day aside and blessed the day, making the day holy. And this seventh day was later named as the Sabbath Day and it became the Lord’s Day or the Day of God.
Exodus 31:12 Then the Lord said to Moses, 13 “Say to the Israelites, ‘You must observe my Sabbaths. This will be a sign between me and you for the generations to come, so you may know that I am the Lord, who makes you holy.
Ezekiel 20:12 Also I gave them my Sabbaths as a sign between us, so they would know that I the Lord made them holy.
In these and many other verses God calls the Sabbath as “my Sabbath”, which means the Day of God is the Sabbath Day, that is, Saturday.
The Lord’s Day in the New Testament
Then what about in the New Testament? Jesus also teaches that he is the Lord of the Sabbath. And the Sabbath Day is the Day of Jesus, who is God.
Matthew 12:7 If you had known what these words mean, ‘I desire mercy, not sacrifice,’ you would not have condemned the innocent. 8 For the Son of Man is Lord of the Sabbath.
Jesus says that he is the Lord of the Sabbath. What does it mean? “lord” in English means someone who has authority over someone or something. Therefore, the Lord of the Sabbath means Jesus is the one who has authority over the Sabbath and He is the owner of the Sabbath.
To the Jews who criticized him for desecrating the Sabbath, Jesus was teaching that he is the one who has all the authority over the Sabbath Day. He was insinuating to them that he is God who makes them holy on the Sabbath Day.
By healing the infirmities of people, he was showing the work God is doing on the Sabbath Day to make His people holy. He was truly Lord of the Sabbath.
Conclusion
In the Old Testament and New Testament, the Day of the Lord is the Sabbath Day. God states that He is the Lord of the Sabbath. And the Sabbath day is the Day of God. We as God’s people can be made holy and complete when we keep the Sabbath Day.
Then when is the Sabbath Day according to the bible? It is the Saturday, not Sunday. Therefore they day we must keep holy is the Sabbath day, Saturday. When we are keep the services on Sundays, we are disobeying the commands of God.
God clearly commanded us not to add or subtract for the words of God in the bible. (Revelation 22:18) When we keep the Sunday worship, we are adding to and subtracting from the words of God. We add Sunday and subtract Sabbath. And we cannot receive any blessings from God. Let us keep the Sabbath Day holy.