Christians in some areas decided to start keeping Sunday, so as to try to differentiate themselves from the Jews, who were still faithfully keeping the Sabbath of the Lord. Some Christians began to use the excuse that it was in honor of the resurrection, as there was no scriptural basis for this change. At that time Christians in areas outside the Roman empire continued to keep the true seventh day Sabbath of God.
In 321 A.D. Constantine, who was a pagan, became Caesar in Rome. As he began to see the balance of power shift from paganism to the Church he passed the first law enforcing Sunday worship in 321 AD. Sunday of course was the day that the pagans kept holy in their worship of the Sun god. Two years after passing this law Constantine joined the Roman Catholic Church and began mingling paganism with Christianity. The pagans were very involved with idolatry, so he took many of the statues of their gods and gave them Christian names, like St Peter and Mary. It was well after 400 AD before Sunday eventually took on the name of the Lord’s Day.
In many documents, papers and books written by the Roman Catholic Church, they openly take credit for moving the sanctity of the Seventh day Sabbath to Sunday, by their own authority, which they believe is above that of the scriptures. Here are some examples.
“Protestants…accept Sunday rather than Saturday as the day for public worship after the Catholic Church made the change…But the Protestant mind does not seem to realize that…In observing the Sunday, they are accepting the authority of the spokesman for the church, the Pope.” Our Sunday Visitor , February 15, 1950.
“From this we may understand how great is the authority of the church in interpreting or