冬至十一月中，日躔箕四度，出辰初初刻，入申正四刻，昼长四十一刻，夜长五十九刻。
小寒十二月节，日躔斗十度，入酉初初刻，后六日日出卯正四刻，昼四十二刻，夜五十八刻。
大寒十二月中，日躔牛三度，后四日昼四十三刻，夜五十七刻，后十一日日入酉初一
刻，后十三日日出卯正三刻，昼四十四刻，夜五十六刻。
立春正月节，日躔虚一度，后六日昼四十五刻，夜五十五刻，后十二日日入酉初二刻，
后十三日日出卯正二刻，昼四十六刻，夜五十四刻。
雨水正月中，日躔危六度，后六日昼四十七刻，夜五十三刻，后十二日日入酉初三刻，
十三日日出卯正一刻，昼四十八刻，夜五十二刻。
惊蛰二月节，日躔室六度，后六日昼四十九刻，夜五十一刻，后十二日日入酉初四刻，
十三日出卯正初刻，十四日入酉正初刻，昼五十刻，夜五十刻。
春分二月中，日躔壁三度，出卯初四刻，后七日昼五十一刻，夜四十九刻，后十五日日
入酉正一刻，昼五十二刻，夜四十八刻。
清明三月节，日躔奎九度，出卯初三刻，后七日昼五十三刻，夜四十七刻，后十五日日
入酉正二刻，昼五十四刻，夜四十六刻。
谷雨三月中，日躔娄六度，出卯初二刻，后七日昼五十五刻，夜四十五刻。
立夏四月节，日躔胃九度，入酉正三刻，昼五十六刻，夜四十四刻，后三日日出卯初一
刻，后十一日昼五十七刻，夜四十三刻。
小满四月中，日躔昴八度，后十日日入酉正四刻，昼五十八刻，夜四十二刻。
芒种五月节，日躔毕十一度，出卯初初刻。
夏至五月中，日躔参九度，出寅正四刻，入戌初初刻，昼五十九刻，夜四十一刻。
小暑六月节，日躔井十三度，出卯初初刻，后七日日入酉正四刻，昼五十八刻，夜四十二刻。
大暑六月中，日躔井二十八度，后六日昼五十七刻，夜四十三刻，后十三日日出卯初一刻。
立秋七月节，日躔柳十度，入酉正三刻，昼五十六刻，夜四十四刻，后十日昼五十五刻，夜四十五刻。
处暑七月中，日躔张五度，出卯初二刻，后二日入酉正二刻，昼五十四刻，夜四十六刻，
十一日昼五十三刻，夜四十七刻，十五日日出卯初三刻。
白露八月节，日躔翼二度，后二日日入酉正一刻，昼五十二刻，夜四十八刻，后十日昼
五十一刻，夜四十九刻。
秋分八月中，日躔翼十七度，出卯初四刻，后二日日入酉正初刻，三日日出卯正初
刻，昼五十刻，夜五十刻，后五日入酉初四刻，后十日昼四十九刻，夜五十一刻。
寒露九月节，日躔轸十三度，后三日日出卯正一刻，昼四十八刻，夜五十二刻，后五日日入
酉初三刻，后十日昼四十七刻，夜五十三刻。
\r二十四气斗纲图\pt13a10.bmp\r
五日谓之一候，积三候十五日有零谓之一气，积六气九十日有零为一时，
积四时三百六十五日二十五刻为一岁。
霜降九月中，日躔角九度，后三日日出卯正二刻，昼四十六刻，夜五十四刻，后五日日入酉
初二刻，后十一日昼
四十五刻，夜五十五刻。
立冬十月节，日躔氐二度，后五日日出卯正二刻，昼四十四刻，夜五十六刻，六日日入
酉初一刻，十三日昼四十三刻，夜五十七刻。
小雪十月中，日躔房一度，后十一日日出卯正四刻，昼四十二刻，夜五十八刻。
大雪十一月节，日躔尾六度，入酉初初刻。
\r十二次会中星图\pt13a11.bmp\r
\r二十八宿过宫分野图\pt13a12.bmp\r
此二图当合观
At the Winter Solstice (Dongzhi), occurring in the middle of the eleventh lunar month, the sun traverses four degrees of the Jī (Winnowing Basket) mansion. Sunrise is at the beginning of the Chen hour (07:00–09:00), specifically at the first quarter mark; sunset is at the fourth quarter mark of the Shen hour (15:00–17:00). The day length is forty-one ke (ancient time units), and the night length is fifty-nine ke.
At Minor Cold (Xiaohan), the solar term of the twelfth month, the sun traverses ten degrees of the Dǒu (Dipper) mansion. Sunset is at the beginning of the You hour (17:00–19:00). Six days later, sunrise occurs at the fourth quarter mark of the Mao hour (05:00–07:00). The day length is forty-two ke, and the night length is fifty-eight ke.
At Major Cold (Dahan), the mid-month period of the twelfth month, the sun traverses three degrees of the Niú (Ox) mansion. Four days later, the day length is forty-three ke, and the night length is fifty-seven ke. Eleven days later, sunset is at the first quarter mark of the You hour. Thirteen days later, sunrise is at the third quarter mark of the Mao hour. The day length is forty-four ke, and the night length is fifty-six ke.
At Start of Spring (Lichun), the solar term of the first month, the sun traverses one degree of the Xū (Emptiness) mansion. Six days later, the day length is forty-five ke, and the night length is fifty-five ke. Twelve days later, sunset is at the second quarter mark of the You hour. Thirteen days later, sunrise is at the second quarter mark of the Mao hour. The day length is forty-six ke, and the night length is fifty-four ke.
At Rain Water (Yushui), the mid-month period of the first month, the sun traverses six degrees of the Wēi (Chamber Enclosure) mansion. Six days later, the day length is forty-seven ke, and the night length is fifty-three ke. Twelve days later, sunset is at the third quarter mark of the You hour. On the thirteenth day, sunrise is at the first quarter mark of the Mao hour. The day length is forty-eight ke, and the night length is fifty-two ke.
At Awakening of Insects (Jingzhe), the solar term of the second month, the sun traverses six degrees of the Shì (House) mansion. Six days later, the day length is forty-nine ke, and the night length is fifty-one ke. Twelve days later, sunset is at the fourth quarter mark of the You hour. On the thirteenth day, sunrise is at the initial mark of the Mao hour. On the fourteenth day, sunset is at the initial mark of the You hour. The day length is fifty ke, and the night length is fifty ke.
At Spring Equinox (Chunfen), the mid-month period of the second month, the sun traverses three degrees of the Bì (Wall) mansion. Sunrise is at the fourth quarter mark of the Mao hour. Seven days later, the day length is fifty-one ke, and the night length is forty-nine ke. Fifteen days later, sunset is at the first quarter mark of the You hour. The day length is fifty-two ke, and the night length is forty-eight ke.
At Pure Brightness (Qingming), the solar term of the third month, the sun traverses nine degrees of the Kuí (Legs) mansion. Sunrise is at the third quarter mark of the Mao hour. Seven days later, the day length is fifty-three ke, and the night length is forty-seven ke. Fifteen days later, sunset is at the second quarter mark of the You hour. The day length is fifty-four ke, and the night length is forty-six ke.
At Grain Rain (Guyu), the mid-month period of the third month, the sun traverses six degrees of the Lóu (Bond) mansion. Sunrise is at the second quarter mark of the Mao hour. Seven days later, the day length is fifty-five ke, and the night length is forty-five ke.
At Start of Summer (Lixia), the solar term of the fourth month, the sun traverses nine degrees of the Wèi (Stomach) mansion. Sunset is at the third quarter mark of the You hour. The day length is fifty-six ke, and the night length is forty-four ke. Three days later, sunrise is at the first quarter mark of the Mao hour. Eleven days later, the day length is fifty-seven ke, and the night length is forty-three ke.
At Grain Buds (Xiaoman), the mid-month period of the fourth month, the sun traverses eight degrees of the Mǎo (Hairy Head) mansion. Ten days later, sunset is at the fourth quarter mark of the You hour. The day length is fifty-eight ke, and the night length is forty-two ke.
At Grain in Ear (Mangzhong), the solar term of the fifth month, the sun traverses eleven degrees of the Bì (Net) mansion. Sunrise is at the initial mark of the Mao hour.
At Summer Solstice (Xiazhi), the mid-month period of the fifth month, the sun traverses nine degrees of the Shēn (Three Stars) mansion. Sunrise is at the fourth quarter mark of the Yin hour (03:00–05:00); sunset is at the initial mark of the Xu hour (19:00–21:00). The day length is fifty-nine ke, and the night length is forty-one ke.
At Minor Heat (Xiaoshu), the solar term of the sixth month, the sun traverses thirteen degrees of the Jǐng (Well) mansion. Sunrise is at the initial mark of the Mao hour. Seven days later, sunset is at the fourth quarter mark of the You hour. The day length is fifty-eight ke, and the night length is forty-two ke.
At Major Heat (Dashu), the mid-month period of the sixth month, the sun traverses twenty-eight degrees of the Jǐng (Well) mansion. Six days later, the day length is fifty-seven ke, and the night length is forty-three ke. Thirteen days later, sunrise is at the first quarter mark of the Mao hour.
At Start of Autumn (Liqiu), the solar term of the seventh month, the sun traverses ten degrees of the Liǔ (Willow) mansion. Sunset is at the third quarter mark of the You hour. The day length is fifty-six ke, and the night length is forty-four ke. Ten days later, the day length is fifty-five ke, and the night length is forty-five ke.
At End of Heat (Chushu), the mid-month period of the seventh month, the sun traverses five degrees of the Zhāng (Extended Net) mansion. Sunrise is at the second quarter mark of the Mao hour. Two days later, sunset is at the second quarter mark of the You hour. The day length is fifty-four ke, and the night length is forty-six ke. Eleven days later, the day length is fifty-three ke, and the night length is forty-seven ke. On the fifteenth day, sunrise is at the third quarter mark of the Mao hour.
At White Dew (Bailu), the solar term of the eighth month, the sun traverses two degrees of the Yì (Wings) mansion. Two days later, sunset is at the first quarter mark of the You hour. The day length is fifty-two ke, and the night length is forty-eight ke. Ten days later, the day length is fifty-one ke, and the night length is forty-nine ke.
At Autumn Equinox (Qiufen), the mid-month period of the eighth month, the sun traverses seventeen degrees of the Yì (Wings) mansion. Sunrise is at the fourth quarter mark of the Mao hour. Two days later, sunset is at the initial mark of the You hour. Three days later, sunrise is at the initial mark of the Mao hour. The day length is fifty ke, and the night length is fifty ke. Five days later, sunset is at the fourth quarter mark of the You hour. Ten days later, the day length is forty-nine ke, and the night length is fifty-one ke.
At Cold Dew (Hanlu), the solar term of the ninth month, the sun traverses thirteen degrees of the Zhěn (Chariot) mansion. Three days later, sunrise is at the first quarter mark of the Mao hour. The day length is forty-eight ke, and the night length is fifty-two ke. Five days later, sunset is at the third quarter mark of the You hour. Ten days later, the day length is forty-seven ke, and the night length is fifty-three ke.
At Frost's Descent (Shuangjiang), the mid-month period of the ninth month, the sun traverses nine degrees of the Jiǎo (Horn) mansion. Three days later, sunrise is at the second quarter mark of the Mao hour. The day length is forty-six ke, and the night length is fifty-four ke. Five days later, sunset is at the second quarter mark of the You hour. Eleven days later, the day length is forty-five ke, and the night length is fifty-five ke.
At Start of Winter (Lidong), the solar term of the tenth month, the sun traverses two degrees of the Dǐ (Root) mansion. Five days later, sunrise is at the second quarter mark of the Mao hour. The day length is forty-four ke, and the night length is fifty-six ke. Six days later, sunset is at the first quarter mark of the You hour. Thirteen days later, the day length is forty-three ke, and the night length is fifty-seven ke.
At Light Snow (Xiaoxue), the mid-month period of the tenth month, the sun traverses one degree of the Fáng (Room) mansion. Eleven days later, sunrise is at the fourth quarter mark of the Mao hour. The day length is forty-two ke, and the night length is fifty-eight ke.
At Heavy Snow (Daxue), the solar term of the eleventh month, the sun traverses six degrees of the Wěi (Tail) mansion. Sunset is at the initial mark of the You hour.
Five days constitute one Hou (pentad). Accumulating three Hou (slightly over fifteen days) constitutes one Qi (solar term). Accumulating six Qi (slightly over ninety days) constitutes one Season. Accumulating four Seasons (three hundred sixty-five days and twenty-five ke) constitutes one Year.
These two diagrams should be viewed together.