Some religious organizations (Seventh-Day Adventists, Seventh-Day Baptists, and certain others) claim that Christians must not worship on Sunday but on Saturday, the Jewish Sabbath. They claim that, at some unnamed time after the apostolic age, the Church "changed" the day of worship from Saturday to Sunday.
However, passages of Scripture such as Acts 20:7, 1 Corinthians 16:2, Colossians 2:16-17, and Revelation 1:10 indicate that, even during New Testament times, the Sabbath is no longer binding and that Christians are to worship on the Lord’s day, Sunday, instead.
The early Church Fathers compared the observance of the Sabbath to the observance of the rite of circumcision, and from that they demonstrated that if the apostles abolished circumcision (Gal. 5:1-6), so also the observance of the Sabbath must have been abolished.
The quotations in this tract show that the first Christians understood this principle and gathered for worship on Sunday.
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