The Sabbath was defined as the seventh day of the week. Judaism holds Saturday as the Sabbath. Some Christians hold Saturday as the Sabbath, but most hold Sunday, because of its relation to the Lord’s resurrection.
Does it even Matter?
As far as salvation goes, it does not matter. Neither practice is wrong. Salvation is in Jesus Christ and not in the Sabbath day. We are, as God’s holy people, to keep all days holy, and live all days for him. What is important is the acceptance of Christ and the repentance of our sins.
What is Jesus’ example?
Jesus was a Jew, and we know he followed Jewish law, so he would have observed Saturday. We also know that Jesus fulfilled the law, and upon his payment on the cross we were freed from the law, and follow the law of Christ, to love our God and love our neighbor.
There are some denominations that may insist on one way or another. When Christians judge one another on such a matter, it causes division and spite in the family of Christ. Paul encountered a similar difficulty as he brought the gospel to the gentiles. Here is what he had to say:
1As for the one who is weak in faith, welcome him, but not to quarrel over opinions. 2 One person believes he may eat anything, while the weak person eats only vegetables. 3 Let not the one who eats despise the one who abstains, and let not the one who abstains pass judgment on the one who eats, for God has welcomed him. 4 Who are you to pass judgment on the servant of another? It is before his own master that he stands or falls. And he will be upheld, for the Lord is able to make him stand.
5 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. 6 The one who observes the day, observes it in honor of the Lord. The one who eats, eats in honor of the Lord, since she gives thanks to God, while the one who abstains, abstains in honor of the Lord and gives thanks to God. 7 For one of us lives to himself, and none of us dies to himself. 8 For if we live, we live to the Lord, and if we die, we die to the Lord. So then, whether we live or whether we die, we are the Lord’s. 9 For to this end Christ died and lived again, that he might be Lord of both the dead and of the living.
10 Why do you pass judgment on your brother? Or you, why do you despise your brother? For we will all stand before the judgment seat of God; 11 for it is written,
As I live, says the Lord, every knee shall bow to me,
and every tongue shall confess to God.”
12 So then each of us will give an account of himself to God.
13 For you were called to freedom, brothers. Only do not use your freedom as an opportunity for the flesh, but through love serve one another. 14 For the whole law is fulfilled in one word: “You shall love your neighbor as yourself.” 15 But if you bite and devour one another, watch out that you are not consumed by one another.