What Day Is the Sabbath?

"It is plainly recorded that the Creator, after laboring the first six days,

in which He completed the work of creation, rested the following day, which was the seventh in the order of creation. 

This particular day God therefore sanctified and blessed.

Genesis 2:3 And God blessed the seventh day.

But what removes all obscurity from the subject is, that God has positively declared that the day which He commanded to be observed in Exodus 20: is the same on which He rested at the close of the creation. 

Exodus 20:8,10,11  Remember the Sabbath day to keep it holy. The seventh day is the Sabbath of the Lord your God... For in six days the Lord made heaven and earth, the sea and all that in them is, and rested on the seventh day: wherefore the Lord blessed the Sabbath day and hallowed it. 

This language is definite; and while it assures us that the day here commanded to be observed is the same in its weekly returns with the day on which God rested, it assures us against any derangement of the week, or loss of time which might have been produced in the long lapse of time from the creation, by the general apostasy from the true worship of God. " 

James White