Fifth day honors ancient gods
The word “Thursday” is more proof that English is classified as a Germanic language. It means Thor’s day.
Thor was a powerful Norse god associated with thunder and lighting, much like Zeus/Jupiter were in Greek/Latin mythology. (The Nordic languages of Danish, Swedish and Norwegian are considered North Germanic languages.)
People whose language is primarily based on Latin pay tribute to Thor’s counterpart, Jupiter (also called Jove) on the same day. For example, “Thursday” is “jueves” in Spanish.
Thor's Battle Against the Jötnar (1872) by Mårten Eskil Winge
Caption and photo of painting courtesy of Wikipedia