A common folk etymology incorrectly claims "Good Friday" is a corruption of "God Friday". The term in fact comes from the sense "pious, holy" of the word good. The Oxford English Dictionary also gives other examples with the sense "of a day or season observed as holy by the church" as an archaic sense of good (good, adj. 8c) as in good tide meaning "Christmas" or "Shrove Tuesday", and Good Wednesday meaning the Wednesday in Holy Week.
In German-speaking countries, Good Friday is generally referred to as Karfreitag (Kar from Old High German kara‚ "bewail", "grieve"‚ "mourn", Freitag for "Friday"): Mourning Friday. The Kar prefix is a cognate of the English word "care" in the sense of cares and woes; it meant mourning. The day is also known as Stiller Freitag ("Silent Friday") and Hoher Freitag ("High Friday, Holy Friday"). In the Nordic countries it is called "The Long Friday". In Greek, Polish and Hungarian, Good Friday is generally referred to as Great Friday (Μεγάλη Περασκευή, Wielki Piątek, Nagypéntek).