Thus the heavens and the earth were finished, and all the host of them. 2 And on the seventh day God finished his work that he had done, and he rested on the seventh day from all his work that he had done. 3 So God blessed the seventh day and made it holy, because on it God rested from all his work that he had done in creation.It seems God planned His Creation work in advance to fit the order of His schedule. Certainly God has resumed His work from that time. In keeping with God's teaching, I know you'll find blessing in your life if you adopt such a life practice, and even more so if you seek to make it holy and pleasing to God.
Some would argue on which day one should rest. Others say it doesn't matter if you do it with the intention of honoring God with your work and your rest. Obviously those who work in certain professions can't abide by the strict rules of others. Jesus taught that the Sabbath (day of rest) was made for man, not man for the Sabbath. For now, let it suffice to pick one with holy intent and make it practice. You and your family will benefit. If you've just begun your work-week, or you're finishing it off, may the Lord bless the works of your hands, and may your rest be pleasing to Him. May it be refreshing to you.