The 24 Solar Terms: The Year in Twenty-Four Breaths

What the 24 solar terms are

The solar terms divide the sun's apparent yearly path — the ecliptic — into twenty-four equal arcs of fifteen degrees. Each time the sun advances fifteen degrees of ecliptic longitude, a new term begins, which works out to one roughly every fifteen days. Four of the twenty-four are already familiar everywhere: the two equinoxes and the two solstices, where the sun crosses 0°, 90°, 180°, and 270°. The other twenty fill the space between, naming the year's weather and work in fine grain — the first thunder, the plumping grain, the first frost.

Because the terms are measured from the sun, they land on nearly the same Gregorian dates every year — 立春 around February 3–5, 冬至 around December 21–22 — drifting by only a day or so. That steadiness is what they lend the Huangli, which is otherwise built on lunar months: the moon's calendar wanders against the seasons, and the solar terms are the stakes that hold it in place. If you already keep moon rituals, the two systems make natural companions — one tracks the month's mood, the other the year's position.

Historically, the terms were agricultural law as much as poetry. They told farmers in the Yellow River basin when to sow, transplant, irrigate, and harvest, and centuries of proverbs are keyed to them. Read together, the names are a field notebook kept for more than two thousand years.

Spring: from Start of Spring to Grain Rain

Spring's six terms trace the thaw — from the year's formal opening to the rains that raise the seedlings.

• 立春 lìchūn — Start of Spring. The year's hinge: spring begins on paper before it can be felt in the air.
• 雨水 yǔshuǐ — Rain Water. Snow gives way to rain, and the thaw begins in earnest.
• 惊蛰 jīngzhé — Awakening of Insects. Spring thunder is said to wake what slept underground.
• 春分 chūnfēn — Spring Equinox. Day and night stand equal; the sun crosses 0° of longitude.
• 清明 qīngmíng — Clear and Bright. Skies clear; also the festival for sweeping and tending ancestral graves.
• 谷雨 gǔyǔ — Grain Rain. Spring's last term: rain enough to raise the young grain.

Summer: from Start of Summer to Major Heat

Summer's six terms follow growth to its peak — the stretch of the year whose full, unguarded light the tarot's Sun card borrows for its imagery.

• 立夏 lìxià — Start of Summer. Growth turns from sprouting to filling.
• 小满 xiǎomǎn — Grain Buds. Kernels plump but are not yet full — a term often read as the beauty of almost.
• 芒种 mángzhòng — Grain in Ear. Bearded grains ripen; the busiest window of planting and harvest at once.
• 夏至 xiàzhì — Summer Solstice. The longest day; light reaches its height and begins its slow retreat.
• 小暑 xiǎoshǔ — Minor Heat. Heat arrives in earnest, though not yet at its worst.
• 大暑 dàshǔ — Major Heat. The year's deepest heat, thick with storms.

Autumn: from Start of Autumn to Frost's Descent

Autumn's six terms are a long exhale — heat withdrawing, dew cooling, the first frost closing the season.

• 立秋 lìqiū — Start of Autumn. Autumn opens inside the heat, felt first in the evening wind.
• 处暑 chǔshǔ — End of Heat. The heat halts and withdraws — 处 here means to stop.
• 白露 báilù — White Dew. Nights turn cool enough to silver the grass by morning.
• 秋分 qiūfēn — Autumn Equinox. Balance again — and from here, the nights begin to win.
• 寒露 hánlù — Cold Dew. The dew itself turns cold; migrating birds head south.
• 霜降 shuāngjiàng — Frost's Descent. First frost, autumn's last term, and the signal to bring the harvest in.

Winter: from Start of Winter to Major Cold

Winter's six terms turn the year inward — storing, snow, the longest night, and the cold's slow last word.

• 立冬 lìdōng — Start of Winter. The storing season begins; fields and households turn inward.
• 小雪 xiǎoxuě — Minor Snow. The first light snows arrive in the north.
• 大雪 dàxuě — Major Snow. Snow deepens and begins to stay.
• 冬至 dōngzhì — Winter Solstice. The longest night — kept as a festival for millennia — and the moment the light starts back.
• 小寒 xiǎohán — Minor Cold. Despite the "minor," often the door to the year's coldest stretch.
• 大寒 dàhán — Major Cold. The final term. The wheel completes, and 立春 waits on the other side.

Living heritage: UNESCO and the almanac

In 2016, UNESCO inscribed the Twenty-Four Solar Terms on its Representative List of the Intangible Cultural Heritage of Humanity — a recognition that this is not a fossil calendar but living knowledge. The terms still decide when families sweep graves at 清明 and gather for dumplings or tangyuan at 冬至, still carry a body of weather proverbs, and still appear in fine print on most calendars sold in China.

Inside the almanac, the terms do quiet structural work. The Huangli's day-quality systems are keyed to them — the twelve day officers, for instance, adjust their cycle at solar-term boundaries — so the sun's position underlies even the parts of the almanac that look purely lunar, from auspicious days to the daily zodiac clash. Read any Chinese calendar closely and the solar terms are the load-bearing beams.

Journaling by the season's term

Fifteen days is a humane rhythm for reflection — slower than a daily page, quicker than a seasonal review. Each new term is a small landmark: the year has measurably moved, and you can ask whether you have moved with it. If you keep a reflection journal, try opening a fresh entry at each term with one of these. (Sparkle Pro members receive a monthly Almanac Letter — good company for exactly this kind of practice.)

1. Which solar term is the year in today — and does your life agree with the calendar? Name where your inner season is running ahead of the sun, or behind it.
2. At the four starts (立春, 立夏, 立秋, 立冬): what are you officially beginning that you have not yet said out loud to anyone?
3. At an equinox (春分 or 秋分): name two things in your life that are briefly, exactly in balance. Which one is about to grow at the other's expense — and is that the trade you want?
4. At a solstice (夏至 or 冬至): what has reached its furthest point in you — an effort, a rest, a feeling — and where do you already sense the turn beginning?
5. The calendar pairs minor before major — 小暑 before 大暑, 小雪 before 大雪. What small version of something are you noticing now that will be the major version in fifteen days if you leave it alone?
6. 小满 names grain that is plump but not yet full. What in your life is at its own xiǎomǎn — genuinely good, still growing, and not ready to be harvested or judged?
7. 霜降 is the signal to bring the harvest in before frost. What should you gather and store from this season — and what is it time to leave in the field?
8. 惊蛰 credits the first thunder with waking what winter put to sleep. What woke you this year — a sentence, an event, a loss — and what has it asked of you since?
9. If you wrote one entry per term for a whole year — twenty-four pages — what single question would you want to answer all twenty-four times, so you could watch it change?

The terms will keep arriving whether or not you write — every fifteen days, on schedule, for the rest of your life. That reliability is the gift: a calendar that keeps asking, gently and on time, where the light is now.

Questions, answered plainly

What are the 24 solar terms in the Chinese calendar?

They are twenty-four divisions of the solar year, each beginning when the sun advances fifteen degrees along the ecliptic — roughly one term every fifteen days. Together they name the year's full arc, from 立春 (Start of Spring) to 大寒 (Major Cold), and include the equinoxes and solstices. They historically governed farming schedules across China and still anchor festivals, food customs, and the structure of the traditional almanac.

Are the solar terms based on the moon or the sun?

The sun, entirely. Each term is fixed by the sun's ecliptic longitude, which is why the terms fall on nearly the same Gregorian dates every year, shifting a day or so with leap-year arithmetic. The traditional Chinese calendar as a whole is lunisolar — its months follow the moon — and the solar terms are precisely the mechanism that keeps those wandering lunar months tied to the actual seasons.

What does jieqi mean?

节气 jiéqì joins 节 jié — a node or joint, as in bamboo — with 气 qì, breath or vital energy: the joints in the year's breath. Classically the twenty-four divide into twelve 节 nodal terms that open each solar month and twelve 中气 midpoint terms between them, though in everyday use jieqi covers all twenty-four.

Which solar terms are also holidays?

清明 Qingming doubles as Tomb-Sweeping Day, when families tend ancestral graves — notable as a public holiday set by a solar term rather than a lunar date. 冬至 Dongzhi, the winter solstice, is a major family occasion marked with dumplings in the north and tangyuan in the south. 立春 has its own customs of "biting the spring" — eating spring pancakes and fresh vegetables to greet the year.

Why did UNESCO recognize the solar terms?

In 2016, UNESCO inscribed the Twenty-Four Solar Terms on the Representative List of the Intangible Cultural Heritage of Humanity, recognizing them as a living system of knowledge about time and the seasons — passed down through festivals, proverbs, foodways, and farming practice — rather than a relic. The inscription honors the way communities still organize parts of daily life around the terms today.