Acts 20:7 reads: “Now on the first day of the week, when the disciples came together to break bread, Paul, ready to depart the next day, spoke to them and continued his message until midnight.” This Scripture does not say Paul observed Sunday, the first day of the week, as a day of worship. If this were an example for us today, we would be starting the service on Saturday night – not on Sunday morning. Verse 7 shows Paul preached to them until midnight. Also services would have to continue till dawn (verse 11).
Next, we realize that the breaking of bread was not a religious service, but merely the eating of a meal. Acts 27:33-38 proves this. Notice Paul’s situation. He was a Roman prisoner in the midst of many Gentiles on board a ship (Acts 27:1-2). Obviously Paul was not holding a religious service. The men ate for their health (verses 33-34).
Acts 20:7 does not describe a regular service. Notice the context. Paul was en route from Greece to Jerusalem (Acts 20:2-3, 16). Since he did not know when he would see the brethren again, he wanted to teach them as much as possible. The people were more than willing to listen. So, after the Sabbath Paul remained behind teaching the brethren, while his ship sailed around the peninsula (verse 13). He remained talking with them till midnight and continued after a short meal until daybreak (Verse 11). Then after Paul had stayed as long as he could, he left them to walk across the peninsula to meet the boat (verses 13-14). He worked on that Sunday by taking this long walk of some 19 miles!
There is nothing in the above Scripture to indicate it was Paul’s custom to observe Sunday. In fact, all through the book of Acts we see it was Paul’s custom to observe the Sabbath (Acts 17:2; 13:14-15; 42-44). We also note in reading Acts 20:6 that Paul was traveling after having observed the Days of Unleavened Bread. He continued to observe the annual holy days as well as the weekly Sabbath years after Christ had died as He remained faithful to the commands of God.