It means we should NOT break OT commandments that are reaffirmed in the NT, because the wage of all sins is death.
There are only one of each day of the week on calendars.
The Ten commandment laws are all in the NT.
Mat 19:17-18
17 And he said unto him, Why callest thou me good? there is none good but one, that is, God: but if thou wilt enter into life, keep the commandments. 18 He saith unto him, Which? Jesus said, Thou shalt do no murder, Thou shalt not commit adultery, Thou shalt not steal, Thou shalt not bear false witness, 19 Honour thy father and thy mother: and, Thou shalt love thy neighbour as thyself.
Jesus said keep the commandments
Then quoted 5 of the 10.
James said ...Jas 2:10-12
10 For whosoever shall keep the whole law, and yet offend in one point, he is guilty of all. 11 For he that said, Do not commit adultery, said also, Do not kill. Now if thou commit no adultery, yet if thou kill, thou art become a transgressor of the law. 12 So speak ye, and so do, as they that shall be judged by the law of liberty.
Paul said... Rom 13:8-10
8 Owe no man any thing, but to love one another: for he that loveth another hath fulfilled the law. 9 For this, Thou shalt not commit adultery, Thou shalt not kill, Thou shalt not steal, Thou shalt not bear false witness, Thou shalt not covet; and if there be any other commandment, it is briefly comprehended in this saying, namely, Thou shalt love thy neighbour as thyself. 10 Love worketh no ill to his neighbour: therefore love is the fulfilling of the law.
Jesus said He was Lord of the Sabbath.
And the sabbath was made for man.
Mat 24:20 But pray ye that your flight be not in the winter, neither on the sabbath day:
This flight is many years after the resurrection of Jesus, and can even apply to the last days. If the sabbath day ment nothing why did Jesus say it.
Nothing states that these 10 commandments are made void.