节 jié (joint; node; section; festival) + 气 qì (energy; vital force; air; breath). The 节气 are the "nodal energies" of the year — the 24 precise points at which the sun reaches specific positions in the ecliptic, dividing the solar year into equal segments of approximately 15 days each. They were calculated with extraordinary precision by Han dynasty astronomers and remained the backbone of Chinese agricultural and medical calendars for two millennia.
The 节气 are not festivals themselves but astronomical markers — the moments when the character of the season's energy (气) shifts. Each term has a name that describes the natural phenomenon occurring at that moment: 雨水 yǔshuǐ "Rain Water," 惊蛰 jīngzhé "Awakening of Insects," 谷雨 gǔyǔ "Grain Rain." Together they form a natural-language almanac of the Chinese year.
The system was inscribed on the UNESCO Intangible Cultural Heritage List in 2016 — China called it "China's fifth great invention," alongside papermaking, printing, the compass, and gunpowder. It remains in active use: TCM practitioners, farmers, chefs, and ordinary people follow the 节气 to calibrate diet, health practices, planting schedules, and seasonal customs.
体系tǐxìThe Full System — All 24 Terms
春 chūn · Spring (February–May)立春 lìchūn Start of Spring · 雨水 yǔshuǐ Rain Water · 惊蛰 jīngzhé Awakening of Insects · 春分 chūnfēn Spring Equinox · 清明 qīngmíng Clear and Bright · 谷雨 gǔyǔ Grain Rain
夏 xià · Summer (May–August)立夏 lìxià Start of Summer · 小满 xiǎomǎn Grain Buds · 芒种 mángzhòng Grain in Ear · 夏至 xiàzhì Summer Solstice · 小暑 xiǎoshǔ Minor Heat · 大暑 dàshǔ Major Heat
秋 qiū · Autumn (August–November)立秋 lìqiū Start of Autumn · 处暑 chǔshǔ End of Heat · 白露 báilù White Dew · 秋分 qiūfēn Autumn Equinox · 寒露 hánlù Cold Dew · 霜降 shuāngjiàng Frost's Descent
冬 dōng · Winter (November–February)立冬 lìdōng Start of Winter · 小雪 xiǎoxuě Minor Snow · 大雪 dàxuě Major Snow · 冬至 dōngzhì Winter Solstice · 小寒 xiǎohán Minor Cold · 大寒 dàhán Major Cold
重要节气zhòngyào jiéqìKey Solar Terms — The Ones That Matter Most
清明QīngmíngClear and Bright — ancestor veneration, tomb sweeping
N 专名 zhuānmíng proper noun
清 qīng (clear; pure) + 明 míng (bright). Falling around April 4–6, this is the most culturally significant solar term — simultaneously an astronomical marker and a public holiday (清明节 Qīngmíng Jié). Families visit ancestral graves, clean and tend them, offer food and paper goods, and burn incense. 扫墓 sǎo mù (tomb sweeping) is the central ritual. The term itself describes the weather: clear skies after winter, the world bright and freshly washed. Tea harvested before 清明 (明前茶 míng qián chá) is the most prized of the year.
清明时节，我们全家去扫墓、祭祖。
Qīngmíng shíjié, wǒmen quánjiā qù sǎo mù, jì zǔ.
At Qingming, the whole family goes to sweep the graves and honor our ancestors.
冬至DōngzhìWinter Solstice — the turning of yin into yang
N 专名 zhuānmíng proper noun
冬 dōng (winter) + 至 zhì (to arrive; to reach its extreme). The Winter Solstice — the shortest day, when yin energy reaches its peak and yang begins to return. Historically considered even more important than the New Year in some regions. Traditional foods: 汤圆 tāngyuán (glutinous rice balls, eaten in southern China), 饺子 jiǎozi (dumplings, eaten in northern China). The saying: 冬至大如年 "Winter Solstice is as grand as New Year."
Dōngzhì nà tiān, běifāng jiājiāhùhù dōu chī jiǎozi.
On Winter Solstice, every household in the north eats dumplings.
春分ChūnfēnSpring Equinox — balance of yin and yang
N 专名 zhuānmíng proper noun
春 chūn (spring) + 分 fēn (to divide; to share equally). The Spring Equinox — the day of perfect balance, when day and night are equal. In traditional cosmology, the moment when yin and yang are in exact equilibrium before yang takes the lead toward summer. A time for 踏青 tàqīng (going out to enjoy fresh spring greenery). Eggs can allegedly be stood on end on this day — a popular legend that millions test each year.
春分这天，白天和黑夜一样长。
Chūnfēn zhè tiān, báitiān hé hēiyè yīyàng cháng.
On the Spring Equinox, day and night are equal in length.
养生yǎng shēngSeasonal Living — TCM and the Calendar
文化洞见 wénhuà dòngjiàn · 节气 and Health
Traditional Chinese medicine is fundamentally seasonal medicine — the body is understood as a microcosm of the natural world, and health is maintained by aligning one's diet, sleep, activity, and emotional state with the current 节气. Each of the 24 terms comes with specific recommendations: what to eat, what to avoid, how to adjust sleep patterns, what acupuncture points to tonify or sedate.
Key seasonal principles: 春夏养阳，秋冬养阴 chūn xià yǎng yáng, qiū dōng yǎng yīn — "In spring and summer, nourish yang; in autumn and winter, nourish yin." This means eating warm, upward-moving foods in spring (sprouts, greens, lamb) and cool, inward-storing foods in autumn (pears, black sesame, walnuts). Violating these seasonal prescriptions is considered a root cause of disease.
The practice of 节气养生 jiéqì yǎngshēng (health cultivation according to the solar terms) has seen a major revival in China, driven partly by the wellness industry and partly by genuine interest in traditional culture. Food accounts, TCM clinics, and social media channels publish seasonal dietary recommendations at each 节气 transition.