Although I have honored the Jewish Shabbat for over 3 years, and try to keep the feasts. I see that in Yeshua all thee feasts and the Shabbat have been fulfilled. But to honor the Shabbat before God in your heart and mind is one own choose if you chose to do this it should be done, but not forced upon others. 5) One person consider some days more holy than others, while someone else regards them as being all alike. What is important is for each to be fully convinced in his own mind. 6) He who observes a day as special does so to honor the Lord. Also he who eats anything eats to honor the Lord, since he gives thanks to God; likewise the abstainer abstains to honor the Lord, and he gives thanks to God. Romans 14:5-6.
But with the B'rit Hadashah, I think that the Christian and Messianic Jews are given a even better Shabbat than the Jewish or Christian Sabbath.
28) Come to Me, all of you who are struggling and burdened, and I will give you REST. 29) Take My yoke upon you and learn from Me, because I Am gentle and humble in heart, and you will find REST for your souls. 30) For My yoke is easy, and My Burden is light.
Mattityahu 11:28-30 Remember that in the following 8 verses, Yeshua calls Himself the Lord of Shabbat (see Mattiyahu 12:1-8).
But I believe the writer of Hebrews/Messianic Jews stated it best.
9) So there remains a Shabbat-keeping for God's people. 10) For the one who has entered into God's REST has also RESTED from his own works, as God did from His.
Messianic Jews 4:9-10
It is not a day, but in Yeshua finished work that we all can rest in, for we have entered into G-d's REST, by resting from our own works, as G-d did on the 7th day from His (B'resheet 2:3)
Just my opinion,