“Fastnacht, refers to the Swabian-Alemannic carnival, which differs in some ways from Fasching and Karneval, and is found in Baden-Württemberg, Franconia (northern Bavaria), Hesse and much of Switzerland. Although this word looks like it comes from the German for the “eve of Lent,” in fact it is based on the Old German word fasen (“to be foolish, silly, wild”). Thus the word, sometimes spelled Fasnacht (without the t) actually means something like “night of being wild and foolish.” www.german-way.com