秋あき立たつ日ひ

noun

first day of autumn; beginning of fall

A poetic or traditional term for the first day of autumn, often used in haiku and seasonal contexts. In modern daily life, 秋の始まり or 立秋 are more common.

• 秋あき立たつ日ひには、風かぜの涼すずしさを感かんじる。

  On the first day of autumn, you feel the coolness of the wind.