God never changed the Sabbath....man did! Error immediately began creeping into the early church and by the time it had gained some respectability....and recognition (Nicaea) 325 A.D., it was a different Church from that the Apostles had given us at Pentecost.
Many Christians were still celebrating the Sabbath on the seventh day and special canons had to be written and enforced to prevent this practice from continuing. The Church by that time had officially declared the Pagan Roman Day of the Sun (Sunday)...(Sol Invictus) to be the official day of worship for the new Imperial State Church sanctioned by Constantine.
Nicaea took place in 325 A.D. and yet by 364 A.D. at the Council of Laodicea you will see these canons published requiring Christians not to associate with or celebrate the Sabbath with the Jews.
Canon #XXIX deals with the abolishment of the Sabbath as the day of worship.
Forty years earlier, at Nicaea the church in it's anti-Jewishness moved the celebration of Passover to the first Sunday after Passover and began calling it Easter. Yes...the early church still celebrated Passover on the 14th of Nisan as the scriptures directed. [Leviticus 23] This move laid the groundwork for much more Anti-Jewishness in future councils.....such as the Council of Antioch (341 A.D.). This council absolutely forbade Christians from celebrating Passover with the Jews.
Polycrates, an early Church Father (130-196 A.D.) was a disciple of Polycarp, the Bishop of Smyrna. Polycarp in turn had been a disciple of The Apostle John....the last living Apostle. This is some of what Polycrates had to say about Passover!
Please refer to my earlier post #86 with regards to the crucifixion and death of Our Lord on the 14th. Also, the direction received from God as to the correct date for this celebration in [Leviticus 23:5]. Then ask yourself this simple question. If God directed it....and the Apostles and the Early Church celebrated it....why don't I?
Barnabas 15:8
Finally He saith to them; Your new moons and your Sabbaths I cannot away with. Ye see what is His meaning ; it is not your present Sabbaths that are acceptable [unto Me], but the Sabbath which I have made, in the which, when I have set all things at rest, I will make the beginning of the eighth day which is the beginning of another world.
Barnabas 15:9
Wherefore also we keep the eighth day for rejoicing, in the which also Jesus rose from the dead, and having been manifested ascended into the heavens.
Of course, we know that this did not take root, as there had to be a civil law to enforce this heresy over 200 years after it was penned.