<Tr> <Td> interpretatio germanica </Td> <Td> Sun </Td> <Td> Moon </Td> <Td> Tiwaz </Td> <Td> Wodanaz </Td> <Td> Þunraz </Td> <Td> Frige </Td> <Td>--</Td> </Tr> <Tr> <Td> Old English </Td> <Td> sunnandæg </Td> <Td> mōnandæg </Td> <Td> tiwesdæg </Td> <Td> wōdnesdæg </Td> <Td> þunresdæg </Td> <Td> frīgedæg </Td> <Td> sæterndæg </Td> </Tr> <P> An ecclesiastical, non-astrological, system of numbering the days of the week was adopted in Late Antiquity . This model also seems to have influenced (presumably via Gothic) the designation of Wednesday as "mid-week" in Old High German (mittawehha) and Old Church Slavonic (срѣда). Old Church Slavonic may have also modeled the name of Monday, понєдѣльникъ, after the Latin feria secunda . The ecclesiastical system became prevalent in Eastern Christianity, but in the Latin West it remains extant only in modern Icelandic, Galician and Portuguese . </P> <Table> <Tr> <Td> </Td> <Td> 1 . Sunday (Christian Sabbath) </Td> <Td> 2 . Monday </Td> <Td> 3 . Tuesday </Td> <Td> 4 . Wednesday </Td> <Td> 5 . Thursday </Td> <Td> 6 . Friday (Muslim Sabbath) </Td> <Td> 7 . Saturday (Jewish Sabbath) </Td> </Tr> <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> </Table>

Where does the seven day week come from