Etymology

Tuesday

Tues·day
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Today it means: The third day of the week in many religious traditions, and the second day of the week in systems that use the ISO 8601 norm; it follows Monday and precedes Wednesday. Full definition →

Middle English Tewesday ← Old English tīwesdæġ ← Proto-West Germanic *Tīwas dag
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The story

  1. Proto-West Germanic · inherited from*Tīwas dag“Tuesday”
  2. Old English · inherited fromtīwesdæġ“Tuesday”
  3. Middle English · inherited fromTewesday
  4. English todayTuesday

From Middle English Tewesday, from Old English tīwesdæġ (“Tuesday”), from Proto-West Germanic *Tīwas dag (“Tuesday”, literally “Tiw's Day”), equivalent to Tiu + -s- + day. This was a Germanic interpretation of Latin diēs Mārtis, itself a translation of Ancient Greek Ἄρεως ἡμέρα (Áreōs hēméra) (interpretatio romana). Cognate with Scots Tysday (“Tuesday”), Saterland Frisian Täisdai (“Tuesday”), West Frisian tiisdei (“Tuesday”), dialectal German Ziestag (“Tuesday”), Danish tirsdag (“Tuesday”), Swedish tisdag (“Tuesday”), Finnish tiistai (“Tuesday”). More at Tyr, day.

Etymology from Wiktionary, CC BY-SA 4.0.