<P> The seven - day week spread throughout the Roman Empire in Late Antiquity . By the 4th century, it was in wide use throughout the Empire, and it had also reached India and China . </P> <P> The Greek and Latin names are as follows: </P> <Table> <Tr> <Th> Day: (see Irregularities) </Th> <Th> Sunday Sōl or Helios (Sun) </Th> <Th> Monday Luna or Selene (Moon) </Th> <Th> Tuesday Mars or Ares (Mars) </Th> <Th> Wednesday Mercurius or Hermes (Mercury) </Th> <Th> Thursday Iuppiter or Zeus (Jupiter) </Th> <Th> Friday Venus or Aphrodite (Venus) </Th> <Th> Saturday Saturnus or Kronos (Saturn) </Th> </Tr> <Tr> <Th> Greek </Th> <Td> ἡμέρᾱ Ἡλίου hēmérā Hēlíou </Td> <Td> ἡμέρᾱ Σελήνης hēmérā Selḗnēs </Td> <Td> ἡμέρᾱ Ἄρεως hēmérā Áreōs </Td> <Td> ἡμέρᾱ Ἑρμοῦ hēmérā Hermoû </Td> <Td> ἡμέρᾱ Διός hēmérā Diós </Td> <Td> ἡμέρᾱ Ἀφροδῑ́της hēmérā Aphrodī́tēs </Td> <Td> ἡμέρᾱ Κρόνου hēmérā Krónou </Td> </Tr> <Tr> <Th> Latin </Th> <Td> diēs Sōlis </Td> <Td> diēs Lūnae </Td> <Td> diēs Martis </Td> <Td> diēs Mercuriī </Td> <Td> diēs Iōvis </Td> <Td> diēs Veneris </Td> <Td> diēs Saturnī </Td> </Tr> </Table> <Tr> <Th> Day: (see Irregularities) </Th> <Th> Sunday Sōl or Helios (Sun) </Th> <Th> Monday Luna or Selene (Moon) </Th> <Th> Tuesday Mars or Ares (Mars) </Th> <Th> Wednesday Mercurius or Hermes (Mercury) </Th> <Th> Thursday Iuppiter or Zeus (Jupiter) </Th> <Th> Friday Venus or Aphrodite (Venus) </Th> <Th> Saturday Saturnus or Kronos (Saturn) </Th> </Tr>

Name of the 7 days in a week