'Sabbath Day' in the Bible

and it being the Sabbath day, He began to preach in the synagogue: and many hearing were astonished, saying, Whence are these things to this one? and, What wisdom is given unto Him? Such miracles are wrought by His hands.

Then they returned into Jerusalem from the mount called Olivet, which is near Jerusalem, being a journey of a Sabbath day.

And they having come from Perge, arrived into Picidian Antioch, and having come into the synagogue on the Sabbath day, they sat down.

And on the Sabbath day we went out from the gate by the river, where we were accustomed that prayer should be, and having sat down, we spoke to the women having assembled.