When God created our world He rested on the seventh day. Science has now shown He created a seven day biological rhythm in us at the same time.
Seven-day human biological rhythms: An expedition in search of their origin, synchronization, functional advantage, adaptive value and clinical relevance - PubMed
This fact-finding expedition explores the perspectives and knowledge of the origin and functional relevance of the 7 d domain of the biological time structure, with special reference to human beings. These biological rhythms are displayed at various levels of organization in diverse species -...
pubmed.ncbi.nlm.nih.gov