In Leviticus, 23rd Chapter the Sabbath day and the High Holy Days which begin I believe on the new moon. Are the feast of the Lord's. These days are to be observe in their season. In Colossians 2:16-17, "Let no man therefore judge you in meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath days. Which are a shadow of things to come; but the body is of Christ. These feast days are the plans of God, they represent the future, with example from the past. All Holy Days are not to eat or drink, such as the atonement, but still to be observe. So this is actually what a person would say to someone who do not keep these feast day of the Lord, if they were judging them on those High and Holy Sabbath days, they were keeping. They would quoted Colossians 2: 16-17. So if you keep the first day of the week, Sunday, Easter and Christmas Paganism, then it makes no sense to use this verse. You cannot worship other days and God’s, that’s not written in the Bible to do, and then use the Bible to justify it. So if you keep another day thats not written in the Bible, then you are doing something on your own, thus it would really be contradictorily.