, identified with Mars, after whom Tuesday is named.]] Tuesday is the day of the week between Monday and Wednesday. The name comes from Middle English Twisday, from Old English Tiwes dæg, named after the Nordic god Tyr, who was the equivalent of the Roman war god Mars.In Latin, it is called Martis dies which means "Mars' Day". In Romance languages except Portuguese, the word for "Tuesday" is similar to the Latin name: mardi in French, martes in Spanish, martedì in Italian, dimarts in Catalan, and mar?i in Romanian.Portuguese uses numbers instead of pagan names and so their word for "Tuesday" is terça-feira (i.e. the third day).The English and Scandinavian names are derived from the Nordic god Týr (Old English Tiw):
Old English: tÃwesdæg, Old Frisian tîesdei
Middle English: tÃesdæi, tywesdai, twysday
Early Modern English: towesday, Twesdaie, Tyisday, Tiseday, Tuesday
Old High German: zîestag
Middle High German: zîstag
Alemannic German ziischtig
Old Norse: týrsdagr
Source:
http://en.wikipedia.org/wiki/Tuesdays