“6We sailed from Philippi after the days of Unleavened Bread, and came to them at Troas within five days; and there we stayed seven days. 7On the first day of the week, when we were gathered together to break bread, Paul began talking to them, intending to leave the next day, and he prolonged his message until midnight.” Acts 20:6,7.
The church came together on the first day of the week to break bread. Now I’m pretty sure the church was eating breakfast, lunch, or dinner all seven days of the week. So the Holy Spirit is referring to something else, namely, the partaking of the Lord’s Supper. It is the Lord’s Day, the day the church assembled for worship and edification. This is partly accomplished by eating the bread and drinking the cup in remembrance and proclamation of the death of Jesus Christ. Why will the church partake of the emblems on the first day of the week? Because it is the pattern given to us in the Bible. It was the practice of the early church.