"Then He [Jesus] went down to Capernaum, a city of Galilee, and was teaching them on the Sabbaths."
Isn't it weird when you read a verse, and don't recall ever really seeing it before? That is what happened with me today, with this verse: Lk. 4:31. Why would the Holy Spirit lead Luke to write that Jesus taught on the "Sabbaths"? What about all the other days of the week? Could it be, that God's provision of the Sabbath was meant to be especially highlighted?
At any rate, this much we know: God's people are to be preached to on the Sabbath Days, (which are now, in the New Covenant church era, Sundays, the day commemorating the Redeemer's resurrection from the dead).
[Puritan quote of the day: "God, who is the chief of our happiness, must have the chief of our affections." --Thomas Watson, in "All Things for Good"]