The Baptist Catechism

Q.65: How is the Sabbath to be sanctified?
A. The Sabbath is to be sanctified by a holy resting all that day, even from such worldly employments and recreations as are lawful on other days, and spending the whole time in the public and private exercises of God’s worship, except so much as is to be taken up in the works of necessity and mercy.

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. Acts 20:7