A day of rest

2 So the sky, the earth and all that filled them were finished. 2 By the seventh day God finished the work he had been doing. So on the seventh day he rested from all his work. 3 God blessed the seventh day and made it a holy day. He made it holy because on that day he rested. He rested from all the work he had done in creating the world.

Genesis 2:1-3

If you wish to set aside a Monday, a Tuesday, a Wednesday, a Thursday, a Friday, or a Saturday to worship the Lord, then you may do so. If you don’t want to set aside any day, then you may do that as well. Let each of you be convinced in your own mind, and without compulsion to follow the Lord as you rest in His work and in it alone.