Naming the days of the week:

The ancient Babylonians, then the Romans, named the days of the week after planets and other bodies they saw in the sky.

Sunday

Sun's day -

Monday

Moon's day -

Tuesday

Tiu's day - Mars, the Roman god of war, was adopted in Scandinavian mythology as the warrior Tiu or Tiw.

Wednesday

Woden's day - The Roman god Mercury became the Scandinavian god Woden.

Thursday

Thor's day - Like the Roman god Jupiter, Thor was a thunder god.

Friday

Freyja's day - Like Venus, Freyja or Frigg was the goddess of love

Saturday

Saturn's day -