Most Christians worship on Sunday hoping for the heaven. They think that the reason they worship on Sunday is that Jesus was resurrected on Sunday. However, God has never changed the worship day because of that reason. Even after Jesus’ resurrection, the apostle Paul worshiped on Saturday.

Act 17:2-3 As was his custom, Paul went into the synagogue, and on three Sabbath days he reasoned with them from the Scriptures, explaining and proving that the Messiah had to suffer and rise from the dead. “This Jesus I am proclaiming to you is the Messiah,” he said.
‭‭
The Apostle Paul kept the Sabbath as was his custom. Then what day of the week is the Sabbath?

Ex 20:8-11 “Remember the Sabbath day by keeping it holy. Six days you shall labor and do all your work, but the seventh day is a sabbath to the Lord your God. On it you shall not do any work, neither you, nor your son or daughter, nor your male or female servant, nor your animals, nor any foreigner residing in your towns. For in six days the Lord made the heavens and the earth, the sea, and all that is in them, but he rested on the seventh day. Therefore the Lord blessed the Sabbath day and made it holy.
‭‭
This is the fourth commandment of the Ten Commandments. God commanded us to keep the Sabbath. God said the Sabbath is the seventh day of the week. We must worship God on the Sabbath, the seventh day of the week. Then what day of the week is the seventh day? It’s Saturday.

Even after Jesus’ resurrection, the Apostles and the early church kept the Sabbath. There's no teaching in the Bible that God changed the worship day. Let’s keep the Sabbath on Saturday in WMSCOG. The Sabbath in WMSCOG is the absolute will of God who leads us to the eternal heavenly Kingdom.