Days of the week in Spanish and the origin of their names

Days of the week

Monday
From Latin "Lunae, Lunis", meaning "Moon".

Lunes: "The day of the Moon".

Tuesday
From Latin "Mārs, Martis", meaning "Mars", the Roman god of war.

Martes: "the day of Mars".

Wednesday
From Latin "Mercurius, Mercurii", meaning Mercury, the Roman god of commerce.

Miércoles: "the day of Mercury"

Thursday
From Latin "Iuppiter, Iovis", meaning Jupiter, the god of the sky and thunder.

Jueves: "the day of Jupiter"

Friday
From Latin "Venus, Veneris", meaning Venus, the goddess of love and beauty.

Viernes: "the day of Venus"

From ecclesiastical Latin "Sabbătum", coming from Greek "σάββατον" (sábbaton), and this one from Hebrew "יום השבת" (shabat), meaning "rest"

Sábado: "the day of resting"

Sunday
From the late Latin "Dominĭcus", meaning the Lord of Christian tradition.

Domingo: "the day of the Lord"