<Table> <Tr> <Th> Day: (see Irregularities) </Th> <Th> Sunday Sōl (Sun) </Th> <Th> Monday Luna (Moon) </Th> <Th> Tuesday Mars (Mars) </Th> <Th> Wednesday Mercurius (Mercury) </Th> <Th> Thursday Iuppiter (Jupiter) </Th> <Th> Friday Venus (Venus) </Th> <Th> Saturday Saturnus (Saturn) </Th> </Tr> <Tr> <Th> Italian </Th> <Td> domenica </Td> <Td> lunedì </Td> <Td> martedì </Td> <Td> mercoledì </Td> <Td> giovedì </Td> <Td> venerdì </Td> <Td> sabato </Td> </Tr> <Tr> <Th> Lombard Milanese </Th> <Td> domenega </Td> <Td> lunedì </Td> <Td> martedì </Td> <Td> mercoldì </Td> <Td> giovedì </Td> <Td> venerdì </Td> <Td> sabet </Td> </Tr> <Tr> <Th> Old Portuguese </Th> <Td> domingo </Td> <Td> lues </Td> <Td> martes </Td> <Td> mércores </Td> <Td> joves </Td> <Td> vernes </Td> <Td> sábado </Td> </Tr> <Tr> <Th> Galician </Th> <Td> domingo </Td> <Td> luns </Td> <Td> martes </Td> <Td> mércores </Td> <Td> xoves </Td> <Td> venres </Td> <Td> sábado </Td> </Tr> <Tr> <Th> Spanish </Th> <Td> domingo </Td> <Td> lunes </Td> <Td> martes </Td> <Td> miércoles </Td> <Td> jueves </Td> <Td> viernes </Td> <Td> sábado </Td> </Tr> <Tr> <Th> Romanian </Th> <Td> duminică </Td> <Td> luni </Td> <Td> marți </Td> <Td> miercuri </Td> <Td> joi </Td> <Td> vineri </Td> <Td> sâmbătă </Td> </Tr> <Tr> <Th> French </Th> <Td> dimanche </Td> <Td> lundi </Td> <Td> mardi </Td> <Td> mercredi </Td> <Td> jeudi </Td> <Td> vendredi </Td> <Td> samedi </Td> </Tr> <Tr> <Th> Occitan </Th> <Td> dimenge </Td> <Td> diluns </Td> <Td> dimarts </Td> <Td> dimècres </Td> <Td> dijòus </Td> <Td> divendres </Td> <Td> dissabte </Td> </Tr> <Tr> <Th> Catalan </Th> <Td> diumenge </Td> <Td> dilluns </Td> <Td> dimarts </Td> <Td> dimecres </Td> <Td> dijous </Td> <Td> divendres </Td> <Td> dissabte </Td> </Tr> <Tr> <Th> Asturian </Th> <Td> domingu </Td> <Td> llunes </Td> <Td> martes </Td> <Td> miércoles </Td> <Td> xueves </Td> <Td> vienres </Td> <Td> sábadu </Td> </Tr> <Tr> <Th> Venetian </Th> <Td> domenega </Td> <Td> luni </Td> <Td> marti </Td> <Td> mèrcore </Td> <Td> zioba </Td> <Td> vénare </Td> <Td> sabo </Td> </Tr> <Tr> <Th> Friulian </Th> <Td> domenie </Td> <Td> lunis </Td> <Td> martars </Td> <Td> miercus </Td> <Td> joibe </Td> <Td> vinars </Td> <Td> sabide </Td> </Tr> <Tr> <Th> Neapolitan </Th> <Td> dummeneca </Td> <Td> lunnerì </Td> <Td> marterì </Td> <Td> miercurì </Td> <Td> gioverì </Td> <Td> viernarì </Td> <Td> sàbbatu </Td> </Tr> <Tr> <Th> Sardinian language </Th> <Td> dominiga </Td> <Td> lunis </Td> <Td> martis </Td> <Td> mercuris </Td> <Td> iobia </Td> <Td> chenabura </Td> <Td> Sappadu </Td> </Tr> <Tr> <Th> Sicilian </Th> <Td> dumínica </Td> <Td> luni </Td> <Td> marti </Td> <Td> mércuri </Td> <Td> juvi </Td> <Td> vénniri </Td> <Td> sábbatu </Td> </Tr> </Table> <Tr> <Th> Day: (see Irregularities) </Th> <Th> Sunday Sōl (Sun) </Th> <Th> Monday Luna (Moon) </Th> <Th> Tuesday Mars (Mars) </Th> <Th> Wednesday Mercurius (Mercury) </Th> <Th> Thursday Iuppiter (Jupiter) </Th> <Th> Friday Venus (Venus) </Th> <Th> Saturday Saturnus (Saturn) </Th> </Tr> <Tr> <Th> Italian </Th> <Td> domenica </Td> <Td> lunedì </Td> <Td> martedì </Td> <Td> mercoledì </Td> <Td> giovedì </Td> <Td> venerdì </Td> <Td> sabato </Td> </Tr> <Tr> <Th> Lombard Milanese </Th> <Td> domenega </Td> <Td> lunedì </Td> <Td> martedì </Td> <Td> mercoldì </Td> <Td> giovedì </Td> <Td> venerdì </Td> <Td> sabet </Td> </Tr>

Where did we get the names of the week