Shonan NewsSeasonal markers: the 210th and 220th days
星座にまつわるエトセトラ 「二百十日と二百二十日」
The piece describes zassetsu, calendar days used in Japan alongside the Chinese-derived 24 sekki to capture local seasonal shifts. Examples include Setsubun, the day before Risshun, used to ward off evil, and the specific markers Ni-hyaku-tōka (the 210th day) and Ni-hyaku-nijūka (the 220th day), which historically signaled changes in weather and agricultural timing. The article explains these markers’ cultural and practical roles in traditional Japanese life.