The logic is -- as stated in the post just before this one...
two creation events will have existed in
Rev 21 at the TIME of the NEW earth -- so that in that
New Earth we have two cycles for regular worship
As for the difference between the New Moon and the Sabbath.
1. The New Moon was never called a "Sabbath" in either OT or NT
2. The New Moon service is not one of the Ten.
3. There is no connection between New Moon and Sabbath such that the Sabbath can only be kept if you are keeping a New Moon service
4. There are no gentiles asking for "more gospel preaching on the next New Moon" unlike the case for Sabbath in Acts 13
5. There is no "New moon for gentiles" in
Is 56:6-8 unlike the case for the weekly Sabbath - but there is New Moon for all mankind in
Is 66:23
6. There is no "New Moon made for mankind" in
Mark 2:27 unlike the case for the weekly Sabbath.
So then I am happy for you if you are focused on keeping a New Moon worship schedule, but this thread is about the TEN Commandments spoken by God at Sinai where we are told "He spoke the TEN Commandments - and added NO more" Deut 5:22 as a strong indicator that we should consider discussing whatever commandment someone wishes to delete - to see if that is really a wise decision.
You may wish to have this repeated a few times - but the point is always the same when it is posted. The New Covenant writes the moral Law of God on the heart , by creating the new birth, new heart experience as Jer 31:31-34 points out.