MARK 6:2
2 And when the Sabbath day came, he began to teach in the synagogue: and many hearing him were astonished, saying, From where has this man these things? and what wisdom is this which is given to him, that even such mighty works are done by his hands?
LUKE 4:16 (About Jesus)
16 And he came to Nazareth, where he had been brought up: and,
as his custom was, he went into the synagogue on the Sabbath day, and stood up to read.
LUKE 4:31
31 And came down to Capernaum, a city of Galilee, and taught them on the Sabbath days.
LUKE 6:6
6 And it came to pass on another Sabbath, that he entered into the synagogue and taught: and there was a man whose right hand was withered.
LUKE 13:10
10 And he was teaching in one of the synagogues on the Sabbath.
JOHN 15:10 (Jesus)
10 If you keep my commandments, you shall abide in my love; even as I have kept my Father's commandments, and abide in his love.
His Fathers commandments include the keeping of the Sabbath yes?
http://www.biblesabbath.org/tss/515/sabbath.html
He started His ministry on earth on a Sabbath and began His role as risen savior on a Sabbath...
So He is our example...
He even instructed prayers the Sabbath could be kept in future times of trouble...
No Sunday Ham here buddy...