>>211874137in spanish the days of the week are based the roman names of greek mithology
lunes (monday) for luna (moon)
martes (tuersday) for marte (mars)
miercoles (wednesday) for mercurio (mercury)
jueves (thursday) for júpiter (jupiter)
viernes (friday) for venus (venus)
sabado actually idk (something about sabbat)
and domingo which comes from domus, because we use it for mass (or just be slack)