when was the sabbath day changed from saturday to sunday
Sabbath in Christianity Early Christians continued to pray and rest on the seventh day.[9] By the 2nd century AD some Christians also observed Sunday, the day of the week on which Jesus had risen from the dead and on which the Holy Spirit had come to the apostles.[9] Paul and the Christians of Troas, for example, gathered on Sunday "to break bread," [10] Soon Christians were observing only Sunday and not the Sabbath.[9] Patristic writings attest that by the second century, it had become commonplace to celebrate the Eucharist in a corporate day of worship on the first day.[11] A Church Father, Eusebius, stated that for Christians, "the sabbath had been transferred to Sunday".[12]
Lord's Day According to some sources, Christians held corporate worship on Sunday in the 1st century.[1] The earliest Biblical example of Christians meeting together on a Sunday for the purpose of "breaking bread" and preaching is cited in the New Testament book The Acts of the Apostles chapter 20 and verse 7 (Acts 20:7). 2nd-century writers such as Justin Martyr attest to the widespread practice of Sunday worship (First Apology, chapter 67), and by 361 AD it had become a mandated weekly occurrence. During the Middle Ages, Sunday worship became associated with Sabbatarian (rest) practices. Some Protestants today (particularly those theologically descended from the Puritans) regard Sunday as Christian Sabbath, a practice known as first-day Sabbatarianism. (Some Christian groups hold that the term "Lord's Day" can only properly refer to seventh-day Sabbath or Saturday.)