What does 下旬 mean?
下旬 is a Japanese noun meaning “month (last third of)” in English. It is written as 下旬 in kanji, げじゅん in hiragana, and gejun in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
８月下旬に彼らは繁殖のために長い旅に出発します。
In late August, they set off on a long journey for breeding.