Ae (Quenya?) noun "day" (LEP/LEPEN/LEPEK - ae was written over ar [# 2] in the names of the Valinorean week, but ar was not struck out.)
ar (2) noun "day" (PE17:148), apparently short for árë, occurring in the names of the Valinorean week listed below. Tolkien indicated that ar in these names could also be arë when the following element begins in a consonant (VT45:27). Usually the word for "day" in LotR-style Quenya is rather aurë (or ré), q.v.
ré noun "day" (of the sun), a full 24-hour cycle (Appendix D) composed of aurë (day, daylight) and lómë "night" (VT49:45). Short -rë in compounds like Ringarë (q.v.). Allative rénna (VT49:45).
árë noun "day" (PM:127) or "sunlight" (SA:arien). Stem ári- _(PE17:126, where the word is further defined as "warmth, especially of the sun, sunlight"). Also name of tengwa #31; cf. also ar # 2. Originally pronounced ázë; when /z/ merged with /r/, the letter became superfluous and was given the new value ss, hence it was re-named essë (Appendix E)_. Also árë nuquerna *"árë reversed", name of tengwa #32, similar to normal árë but turned upside down (Appendix E). See also ilyázëa, ilyárëa under ilya. In the Etymologies, this word has a short initial vowel: arë pl. ari (AR1)
[ala (7) noun "day", also alan "daytime". The forms allen, alanen listed after these words could be inflected forms of them, genitive "of daytime", constracted (allen = al'nen) and uncontracted. However, Tolkien struck out all of this (VT45:13).]