Albert Barnes Commentary Acts 20:7

"And upon the first day of the week, when we were gathered together to break bread, Paul discoursed with them, intending to depart on the morrow; and prolonged his speech until midnight." — Acts 20:7 (ASV)

And upon the first day of the week. This shows that this day was then observed by Christians as holy time (Compare to 1 Corinthians 16:2 and Revelation 1:10).

To break bread. This was evidently to celebrate the Lord's Supper . The Syriac version understands it this way, translating it as "to break the Eucharist," that is, the eucharistic bread. It is probable that the apostles and early Christians celebrated the Lord's Supper on every Lord's Day.

And continued his speech until midnight. Paul's discourse continued until the breaking of day (Acts 20:11), but it was interrupted around midnight by the accident that occurred to Eutychus. The fact that Paul was about to leave them on the next day, probably to see them no more, was the principal reason his discourse was so long.

We should not suppose, however, that it was one continuous or set discourse. A significant part of the time might have been spent in hearing and answering questions, though Paul was the chief speaker.

This case proves that such seasons of extraordinary devotion may, in particular circumstances, be proper. Occasions may arise when it will be appropriate for Christians to spend a much longer time than usual in public worship. It is evident, however, that such seasons do not often occur.