Mittwoch.

From Middle High German mittewoche, from Old High German mittawehha (literally “middle of the week”), calqued on Ecclesiastical Latin media hebdomas (whence Dalmatian misedma). Equivalent to Mitte (“mid, middle”) + Woche (“week”), becoming a masculine in Early Modern German after the other weekdays. Compare Middle Low German middewēke, English midweek. Originally meaning the middle between Sunday and Saturday, now often reinterpreted as the middle of the working week. The original West Germanic word for Wednesday, *Wōdanas dag (“Odin's day”), had already been displaced in Old High German times. It is only attested in regional Middle High German as guotentac with g- for w- through dissimilation (likely reinforced by reinterpretation as “good day”). This survived until recently in Central Franconian Jodesdaach. See Wednesday for more.