According to the-ten-commandments.org, what entities and historical events are responsible for the shift in Sabbath observance from Saturday to Sunday? Summarize the website's explanation for why most Christians observe Sunday instead of Saturday as the Sabbath.
Navigate to 'the-ten-commandments.org'. Click on the 'FAQ4' link (id: 116). Click on the 'Fourth (Sabbath) FAQ' link (id: 119). Click on the question 'Why do most keep Sunday if the Sabbath is Saturday?' (id: 238). Extract and summarize the website's explanation for the shift from Saturday to Sunday Sabbath observance.
State that the Roman Catholic Church is identified as primarily responsible for the change. Mention Emperor Constantine's decree in March 321 A.D. regarding Sunday observance, linking it to sun worship. Include the claim that Satan gave power and authority to the Catholic Church to effect this change. Note the Council of Laodicea (A.D. 364) as a key event where the Catholic Church transferred the solemnity from Saturday to Sunday.