[DouglasKC]

You wrote: “These laws were added to the covenant until Christ came.” And until Christ came there was only one covenant and only one testament. When Christ came, however, there was a new covenant, and later a new testament, and still later new festivals. That’s the point.

The holy days of the Lord were not added. They predated the old covenant. They were not part of that covenant. They are the Lord's Holy days and he expects us to honor him by observing his days.

[r9etb]

The holy days of the Lord were not added. They predated the old covenant. They were not part of that covenant.

That is incorrect. The old covenant was made between God and Abram, back in Genesis 15. God's specific references to Holy Days such as Passover and the Sabbath do not show up until the time of Moses, several hundred years later.