Dagur (or Dag, i.e., day), according to the Norse mythology, is the son of Dellingur (twilight), the third husband of Not (night), the daughter of Nurf (darkness), a giant who had his habitation in Jotunheim. Dagur and Not were adopted by Alfadur, who gave them each two stallions and two wagons, with which to journey around the earth once a day. Not rides with her steed Rhimfaxi'(dark mane) in advance. The earth is wet every morning from the foam (dew) running from the steed. Dagur's steed is called Skinfaxi (bright mane); from his shining mane everything becomes light.