<Tr> <Td> Greek </Td> <Td> Κυριακὴ ἡμέρα / kiriaki iméra / </Td> <Td> Δευτέρα ἡμέρα / devtéra iméra / </Td> <Td> Τρίτη ἡμέρα / tríti iméra / </Td> <Td> Τετάρτη ἡμέρα / tetárti iméra / </Td> <Td> Πέμπτη ἡμέρα / pémpti iméra / </Td> <Td> Παρασκευὴ ἡμέρα / paraskevi iméra / </Td> <Td> Σάββατον / sáb: aton / </Td> </Tr> <Tr> <Td> Latin </Td> <Td> (dies) dominica; rarely feria prima, feria dominica </Td> <Td> feria secunda </Td> <Td> feria tertia </Td> <Td> feria quarta; rarely media septimana </Td> <Td> feria quinta </Td> <Td> feria sexta </Td> <Td> Sabbatum; dies sabbatinus, dies Sabbati; rarely feria septima, feria Sabbati </Td> </Tr> <P> A continuous seven - day cycle that runs throughout history paying no attention whatsoever to the phases of the moon was probably first practiced in Judaism, dated to the 6th century BC at the latest . </P> <P> There are several hypotheses concerning the origin of the biblical seven - day cycle . </P>

Where did the concept of a week come from