I gave hour prompt to GTP-4 and got this:

"The Sabbath was never changed from Saturday to Sunday by Jesus Christ or the apostles. Sunday became the day of rest and worship for mainstream Christianity through the Catholic Church claiming authority to overrule Scripture, through pagan influences and through anti-Semitism1. At the Council of Nicaea in A.D. 325 Roman Emperor Constantine and the Catholic Church established Sunday as a day of rest1. Is there anything else you would like to know?"

Me: Tell me more.

"After the death of the original apostles, new ideas began to be introduced into Christianity. During the second century, Ignatius, Justin Martyr, Irenaeus and Clement of Alexandria attacked Sabbath observance. Tertullian followed in the third century. At the Council of Laodicea around 365, the Catholic Church made it illegal to “Judaize” or be idle from work on the seventh-day Sabbath. These changes were accepted by what had become the majority of Christianity, but scattered and persecuted groups of Christians continued to observe the seventh-day Sabbath and other teachings of the early New Testament Church. Is there anything else you would like to know?"