Above the Law episode 22

Above the Law episode 22
Multi episode series of half hour episodes teaching about the law of God.
Many Christians have been taught that the 7th day sabbath day was replaced by Sunday. Where do we find this change of the day in scripture? Looking through historical evidence of the AD era of world history, we see proof where the catholic church openly takes credit for changing the sabbath. The sabbath day is one of the highly contentious subjects of the Law when Christians ask the question" Are Christians obligated to keep THE LAW?