Seasonal division - Kisetsukubun

…In China, the year is divided into 24 parts, and 24 division points, or seasons, are set, including the beginning of spring, the beginning of summer, the beginning of autumn, and the beginning of winter. The seasons are further divided into thirds, and each period is called the first season, the second season, and the third season, and the year is divided into 72 seasons. This seasonal division was also adopted in Japan, and some of the 24 seasons are still in use today. In addition to the beginning of spring, other examples include the awakening of insects, the great heat, and the great cold. …

*Some of the terminology explanations that refer to "seasonal classification" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…中国では1年を24等分して，立春，立夏，立秋，立冬を含む24の区分点すなわち節気を設け，さらに節気の間を3等分して，各期間を初候，二候，三候と呼び，1年を72候に区分した。この季節区分は日本にも取り入れられ，二十四節気のいくつかは現在も用いられている。立春などのほかに，例えば啓蟄（けいちつ），大暑，大寒などがそれである。…

※「季節区分」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報