Satur(n)day, Sunday, Mo(o)nday. From Spanish, I also new that Tuesday is Mars’ day (Martes), Wednesady is Mercury’s day (Miercoles), Thursday is Jupiter’s day (Jueves) and Friday is venus (Viernes).
What I didn’t know is that Thursday is god Thor’s day (Thursday), which got romanized to the god Jupiter’s day. The goddess Frige’s day got romanized to the goddess Venus’ day. The god Tiw’s day (Tuesday) of war got naturally romanized to the god Mars’ day.