Qenya
all(an)ar
adverb. *on no day
alaryas
adverb. *on no day
lálar
adverb. *on no day
Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
The correlative combination ᴹQ. {(a)láqanar >>} allanar or allar appeared in Demonstrative, Relative, and Correlative Stems (DRC) from 1948 along with variants lálar and {láqanaryas >>} alaryas (PE23/109 and note #114), basically combinations of ᴹQ. alla “none” and ᴹQ. -ar(yas) “days”.
Neo-Quenya: For purposes of Neo-Quenya I would update this to ᴺQ. alaurë “on no day” using later aurë for “day”.