These Are the Days of Our Lives
Sunday
…is named after the sun.
Monday
…is named for the moon, and the next four are for Norse gods:
Tuesday
…is for Tiu/Tiw, god of war.
Wednesday
…is for Woden, aka Odin, supreme deity and Tiu’s father.
Thursday
…is for Thor, god of thunder.
Friday
…is for the goddess Frigga, who was also Odin’s wife, and
Saturday
…is for Saturn, Roman god of feasting and fun (fittingly).
Sources for all day names: