The days of the week in different languages. The names of the days come from different sources: In the neolatin languages (Spanish, French, Italian...), the days have their names from the planets, the sun and the moon. During the reform of the Roman calendar, the 'Sun's day' was replaced by 'Dominicus dies' (Lord's day) and 'Saturn's day', replaced by Sabbatum: Spanish: Domingo - dominicus dies / dies domini (Latin) - Lord's day Lunes - Moon's day Martes - Mars' day Miércoles - Mercury's day Jueves - Jupiter's day Viernes - Venus' day Sábado - Sabbatum (Latin) - Shabbat (Hebrew) - the day of rest for the Hebrew people. Portuguese is also a neolatin language, but the days are named according to Ecclesiastical Latin: Domingo - dominicus dies - Lord's day Segunda-feira - secunda feria - second day Terça-feira - tertia feria - third day Quarta-feira - quarta feria - fourth day Quinta-feira - quinta feria - fifth day Sexta-feira - sexta feria - sixth day Sábado - Shabbat (Hebrew) The Germanic languages follow the Latin designation but changes to Norse/Scandinavian mythology: English: Sunday - Sun's day Monday - Moon's day Tuesday - Tyr's day (Norse god of combat) Wednesday - Wodan/Odin's day (the major Norse god) Thursday - Thor's day (god of thunder) Friday - Fríge/Frigg's day (the major goddess) Saturday - Saturn's day