Christ is our example and what does scripture tell us...
"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 for to read."
Luke 4:16
He who created the earth in seven days, made the Sabbath when He created the world at the very beginning..
Genesis 1:1
In the beginning God created the heaven and the earth.
Genesis 2:3
And God blessed the
seventh day, and sanctified it: because that in it he had rested from all his work which God created and made.
So the Sabbath was there from the beginning, made for man. and the Creator Himself kept the Sabbath day:
Genesis 2:1-3
1 Thus the heavens and the earth were finished, and all the host of them.
2 And on the seventh day God ended his work which he had made; and
he rested on the seventh day from all his work which he had made.
3 And God blessed the seventh day, and sanctified it: because that in it he had rested from all his work which God created and made.
and if you look closely at Christ words....
Mark 2:27
And he said unto them,
The sabbath was made for man, and not man for the sabbath:
Jesus Christ is “Lord even of the Sabbath day” as the Creator.
Matthew 12:8
For the Son of man is
Lord even of the sabbath day.
By identifying Himself as “Lord even of the Sabbath day,” Jesus of was showing that He was the One who originally created Earth in six days, and rested on the seventh day. And the New Testament makes clear that Jesus is the Creator...
"All things were made by Him, and without Him was not anything made that has been made."
John 1:3
"He [Jesus] was in the world, and the world was made by Him, and the world knew Him not".
John 1:10
"God, who created all things by Jesus Christ."
Eph. 3:9
"For by Him [Jesus] all things were created that are in heaven and that are on earth, visible and invisible, whether thrones or dominions or principalities or powers. All things were created through Him and for Him."
Col. 1:16
So scripture makes clear Jesus Christ is our Creator and also gave us the Sabbath for man not just the Jews.
Not only did Jesus create the Sabbath but He makes clear it was the seventh day and Blessed and made Holy...
"For in six days the LORD made heaven and earth, the sea, and all that in them is, and rested the seventh day: wherefore the LORD blessed the sabbath day, and hallowed it."
Exodus 20:11
And it was there from before the children of Isreal as you can see from the instructions from God.
"And he said unto them, This is that which the LORD hath said,
To morrow is the rest of the holy sabbath unto the LORD: bake that which ye will bake to day, and seethe that ye will seethe; and that which remaineth over lay up for you to be kept until the morning."
Exodus 16:23
Now you can check the scriptures and it will make clear the Sabbath is on the seventh day. Jesus Christ regularly kept the Sabbath, taught much about the Sabbath, and clearly stated that He is "Lord even of the Sabbath day" so He should know. He taught nothing about it. The Sabbath continues after the cross, and was kept in the book of Acts by both Jews and Gentiles
Acts 13:44
And the next sabbath day came almost the whole city together to hear the word of God.
Acts 18:4
And he reasoned in the synagogue every sabbath, and persuaded the Jews and the Greeks.
Jesus Christ kept the Sabbath and never mentioned "the first day of the week" even one time.