Question: when did sunday become the day of worship

title: Sabbath in Christianity
text: Early Christians continued to pray and rest on the seventh day . By the 2nd century AD some Christians also observed Sunday , the day of the week on which Jesus had risen from the dead and on which the Holy Spirit had come to the apostles . Paul and the Christians of Troas , for example , gathered on Sunday `` to break bread , '' Soon Christians were observing only Sunday and not the Sabbath . Patristic writings attest that by the second century , it had become commonplace to celebrate the Eucharist in a corporate day of worship on the first day . A Church Father , Eusebius , stated that for Christians , `` the sabbath had been transferred to Sunday '' . 

Answer: answer: Paul and the Christians of Troas, for example, gathered on Sunday ``to break bread''. Soon Christians were observing only Sunday and not the Sabbath. A Church Father, Eusebius, stated that for Christians, ``the sabbath had been transferred to Sunday''.
answer: By the 2nd century AD some Christians also observed Sunday.  Paul and the Christians of Troas, for example, gathered on Sunday ``to break bread''. Soon Christians were observing only Sunday and not the Sabbath. A Church Father, Eusebius, stated that for Christians, ``the sabbath had been transferred to Sunday''.