The days of the week are named after Viking gods.
With the exception of Saturday (which came from the Romans and is named for Saturn’s day), we can thank the Norse gods for our entire week:
Sunday — Sol, goddess of the sun
Monday — Mani, goddess of the moon
Tuesday — Tyr, god of war
Wednesday — Odin (or Woden), the Raven god
Thursday — Thor, god of thunder
Friday — Frigg, goddess of marriage