70 A.D. was nearly 40 years after Christ's Ascension and the Sabbath was still intact!!
To those who think the disicples taught to worship on the day of the resurrection, and taught their fellow Jews that Jesus was the Messiah, and that the new day to worship would be Sunday? ..get real! Stephen was Stoned To Death by the Jews in 34 A.D. for teaching that Jesus had risen from the dead and truly was the long-awaited Messiah, and this happened approximately Three And A Half years after Christ was crucified! then the Bible tells us that the Gospel was taken to the Gentiles... ( Acts 7:59, 8:1, 13:46 )
Now common sense should tell you this: If the apostles were spreading the word that "Sunday" was the "new day to worship" there would have been 1) Huge Controversies over it 2) None of those apostles or their converts would hve lived out the year remember, the Jews stoned people for Sabbath-Break.. if the apostles taught that "Sunday" was to replce Saturday, the Bible would be filled with the violent jewish reaction to it. Could you really think the Jews would have tolerated the teaching of another weekly holy day? No way.
The aposoles preaching "Sunday" worhship is just fantasy. It's totally out of the question. The change came from one place, and one place only, the Roman Catholic Church.