New Covenant, Old covenant talk is very misleading. Scripture does not divide it's teaching by a "new covenant" and an "old covenant". That is something that man added to interpretation, probably given by evil forces for it only takes away from knowledge of the true Lord of us all.
Where do you come up with such nonsense? The Bible makes it perfectly clear that there is a distinction between the Old Covenant and the New Covenant,
so it is probably evil forces working through people who try to muddy the waters (as you are doing).
Have you done a proper and serious study of the New Testament, and in particular the epistle to the Hebrews? Had you done that, you would not be making nonsensical statements.
If therefore perfection were by the Levitical priesthood, (for under it the people received the law,) what further need was there that another priest should rise after the order of Melchisedec, and not be called after the order of Aaron? For the priesthood being changed, there is made of necessity a change also of the law....
For there is verily a disannulling [cancellation, annulment, nullification, abrogation] of the commandment going before for the weakness and unprofitableness thereof. For the law made nothing perfect, but the bringing in of a better hopedid; by the which we draw nigh unto God...
By so much was Jesus made a surety of a better testament [covenant]. And they truly were many priests, because they were not suffered to continue by reason of death: But this man, because he continueth ever, hath an unchangeable priesthood. (Heb 7:11,12,18,19,22-24)
This is only a very small sample of what is in Scripture showing the difference between the Old And the New Covenant.
You are also one of those wanting to revive the Old Covenant feasts and festivals. Which shows that you do not proper understanding of the New Covenant ratified with the blood of Christ. Furthermore, you are making a mockery of the sacrifice of Christ.