From Wiktionary, the free dictionary
From குறை (kuṟai) + நாள் (nāḷ).
குறைநாள் • (kuṟaināḷ)
- the remaining portion of a fixed time period (E.g. day, month, year or life-time)
- University of Madras (1924–1936) “குறைநாள்”, in Tamil Lexicon, Madras [Chennai]: Diocesan Press