立冬

Thursday was ritto, the first day of winter by the lunisolar calendar that divides the year into 24 sekki points. "Reki Binran," an 18th-century practical guide of calendar, says of ritto: "The cold deepens with the start of the winter chills."

りっとう ₀ 【立冬】

二十四節気の一。太陽の黄経が二二五度に達する時をいい、太陽暦で一一月八日ごろ。十月節気。「冬立つ」ともいう。［季］冬。《風ひびき―の不二痩て立つ/水原秋桜子》


二十四節氣之一。國曆十一月七日或八日，是進入冬季的開始。金瓶梅˙第六十四回：昨日立冬，萬歲出來祭大廟。