lúan

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.) From Old Irish lúan.

lúan m (genitive lúain)

1. Monday
2. doomsday, judgement day (based on the belief that the world will end on a Sunday)

   Synonym: bráth

• día lúain

• Irish: Luan

lúan m

1. radiance

   Synonym: ném

2. light

   Synonyms: lés, lésbaire, solus, soillse

• Gregory Toner, Sharon Arbuthnot, Máire Ní Mhaonaigh, Marie-Luise Theuerkauf, Dagmar Wodtko, editors (2019), “1 lúan “Monday, doomsday””, in eDIL: Electronic Dictionary of the Irish Language
• Gregory Toner, Sharon Arbuthnot, Máire Ní Mhaonaigh, Marie-Luise Theuerkauf, Dagmar Wodtko, editors (2019), “2 lúan “light, radiance””, in eDIL: Electronic Dictionary of the Irish Language

From Proto-Celtic *louxsnos, from Proto-Indo-European *lówksneh₂ (“moon, shining thing”), derived from the root *lewk- (“to shine”); in the meaning "Monday", originally a calque of Latin (diēs) Lūnae.

lúan m (genitive lúain)

1. Monday
   • c. 800–825, Diarmait, Milan Glosses on the Psalms, published in Thesaurus Palaeohibernicus (reprinted 1987, Dublin Institute for Advanced Studies), edited and with translations by Whitley Stokes and John Strachan, vol. I, pp. 7–483, Ml. 67^c18

     .i. hi luan ro·gabad in salm-so ł is dind oipred for·chomnacuir and.

     It was on Monday that this psalm was sung, or, it is of the work that happened then.

• Middle Irish: lúan
  • Irish: Luan

• (days of the week) láe sechtmaine; domnach,‎ lúan,‎ Máirt,‎ cétaín,‎ dardaín,‎ aín dídine,‎ Satharn ^{(Category: sga:Days of the week)}

• Gregory Toner, Sharon Arbuthnot, Máire Ní Mhaonaigh, Marie-Luise Theuerkauf, Dagmar Wodtko, editors (2019), “1 lúan”, in eDIL: Electronic Dictionary of the Irish Language