And the Lord spake unto Moses, and say unto them, (1) Concerning the feasts of the Lord. which ye shall proclaim to be holy convocations.

(2) Even these are My feasts. These are the words of the Lord which are the Lord Himself that stands for ever. John 1:1 In the beginning was the word, the word was with God and the word was God. The grass withereth, the flower faders: but the word of our God shall stand for ever. The words of the do not change neither do the Lord Himself. Malachi 3:6 I am the Lord, I change not.

Please read about the Lord Jesus Christ revelation about the observance of His feats to be holy convocation, His Ten Commandments where the seventh day Sabbath is, to be holy convocation, which the Lord has blessed, hallowed, that the Lord put on our minds and written on our hearts that has been separated from the dross of the ceremonial laws through the blood of Jesus Christ. Read this on this website