Genesis 2:1 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.
[Patriarchs & Prophets pp 111] Like the Sabbath, the week originated at creation, and it has been preserved and brought down to us through Bible history. God Himself measured off the first week as a sample for successive weeks to the close of time. Like every other, it consisted of seven literal days. Six days were employed in the work of creation; upon the seventh, God rested, and He then blessed this day and set it apart as a day of rest for man. In the law given from Sinai, God recognized the week, and the facts upon which it is based.
After giving the command, “Remember the Sabbath day, to keep it holy,” and specifying what shall be done on the six days, and what shall not be done on the seventh, He states the reason for thus observing the week, by pointing back to His own example: “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 20:8-11. This reason appears beautiful and forcible when we understand the days of creation to be literal. The first six days of each week are given to man for labor, because God employed the same period of the first week in the work of creation.
On the seventh day man is to refrain from labor, in commemoration of the Creator's rest. But the assumption that the events of the first week required thousands upon thousands of years, strikes directly at the foundation of the fourth commandment. It represents the Creator as commanding men to observe the week of literal days in commemoration of vast, indefinite periods. This is unlike His method of dealing with His creatures. It makes indefinite and obscure that which He has made very plain. It is infidelity in its most insidious and hence most dangerous form; its real character is so disguised that it is held and taught by many who profess to believe the Bible.
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. 4 These are the generations of the heavens and of the earth when they were created, in the day that the Lord God made the earth and the heavens.
May The Lord add His blessing to the study of His word. God bless!