Why did Christians start worshipping on Sunday?
The change from Sabbath to Sunday was a gradual one. For the first two hundred years of Christian history believers in Jesus worshiped consistently on the same day as the Jews (Acts 13:42-44). Meanwhile, sun worship was the official religion of the Roman Empire. It also had an official worship day on the first day of the week, called “The Venerable Day of the Sun.” This is where we get the name for Sunday. Around the early fourth century following Constantine’s conversion, thousands of Romans began flooding into the Christian church, bringing an affection for Sunday worship with them. During this same period Judaism became very unpopular in the Roman Empire. So in an effort to distance themselves from the Jewish faith and make Christianity more popular among the pagans, Christian leaders accepted the additional observance of Sunday, which gradually began to eclipse the Bible Sabbath as the popular day of worship.
