Qenya
tana
that
tanar(yas)
adverb. *on that (past) day
in
pronoun. that
tane
pronoun. that
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 correlatives ᴹQ. tanar and tanaryas appeared in Demonstrative, Relative, and Correlative Stems (DRC) from 1948 (PE23/109), a combination of ᴹQ. ta “that” and ᴹQ. -ar(yas) “day”.
Neo-Quenya: For purposes of Neo-Quenya I would update this to ᴺQ. tanaurë “on that day” using Q. aurë for “day”.