What Is The Only Day Of The Week That Derives Its Name From Roman Mythology?

There is one major theme that binds together all the days of the week–all of them are named after gods. Furthermore, out of the seven days of the week, six of the days are named after Germanic and Norse gods. via Pocket http://www.howtogeek.com/trivia/what-is-the-only-day-of-the-week-that-derives-its-name-from-roman-mythology/