Is there historical evidence that either Jesus or His disciples established Sunday as the new Sabbath for Christians? No. In fact, history shows just the opposite. In the final years of the 1st century Christians were still worshipping with Jews. On the Sabbath. In the synagogues.
At that time, Christianity was not a legal religion within the Roman Empire. Judaism was. There were no Christian church buildings. It’s clear that Christians attended Sabbath services in the Jewish synagogues.
We know this because of Jewish reaction against the Christians who joined in the synagogue services. Near the end of the 1st century, Jewish rabbis added a “benediction” to prayers that were recited in the synagogues. It is called the “blessing on the heretics,” but it’s actually a curse directed at Christian converts. Watch the video.