Yes Dan I did know that, and can even tell you when I learned it...because in 1953 I was eight years old, and was given my very own magazine subscription, THE CHILDREN'S DIGEST!
I still remember such important information as how to take a bath (be sure to dry every inch you call your own, to prevent chapping!)...as well as stories from Norse mythology. So I still think that Loki should have gotten one of the days, along with Wodin, Thor, and Freya because Loki is the Norse trickster, the jokester!
Lokisday? Loksday?