'Sabbath Day' in the Bible

Then they returned to Jerusalem from the mount called Olivet, which is near Jerusalem, a Sabbath day's journey away.

But they passed on from Perga and came to Pisidian Antioch. And on the Sabbath day they went into the synagogue and sat down.

and on the Sabbath day we went outside the gate to the riverside, where we supposed there was a place of prayer; and we sat down and began speaking to the women who had come together.