Wednesday

Wednesday (IPA: /ˈwɛnzdeɪ/) is the day of the week following Tuesday and before Thursday. According to international standard ISO 8601 adopted in most western countries it is the third day of the week. In countries that use the Sunday-first convention Wednesday is defined as the fourth day of the week. It is the fourth day of the week in the Judeo-Christian Hebrew calendar as well, which may have been adopted from the ancient Babylonian calendar. The name is derived from Old English Wōdnesdæg and Middle English Wednesdei, "day of Woden", reflecting the pre-Christian religion practiced by the Anglo-Saxons. In other languages, such as the French mercredi, the day's name is a calque of dies Mercurii "day of Mercury". It has the most letters out of all the Gregorian calendar days.

Wednesday is in the middle of the common Western five-day workweek that starts on Monday and finishes on Friday.

The name continues Middle English Wednesdei. Old English still had wōdnesdæg, which would be continued as *Wodnesday (but Old Frisian has an attested wednesdei). By the early 13th century, the i-mutated form was introduced unetymologically.

The name is a calque of the Latin dies Mercurii "day of Mercury", reflecting the fact that the Germanic god Woden (Wodanaz or Odin) during the Roman era was interpreted as "Germanic Mercury".

...
Wikipedia