Declan

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The Japanese word

下旬

is pronounced
gejun | げじゅん
means
month (last third of)
Examples:
その結果、5月下旬に不安神経症や不眠症と診断された。
sono kekka, gogatsu gejun ni fuan shinkeishō ya fuminshō to shindan sa re ta.
As a result, he was diagnosed with insomnia and anxiety neurosis near the end of May.
Examples sourced from tatoeba.org