The 24 solar terms are a time system ancient Chinese astronomers created by tracking the sun’s path along the ecliptic. The year is divided into 24 parts, each about 15 days long. It is essentially a solar calendar that guided farming, diet, clothing and wellness. As early as the pre-Qin period, observers had already linked the length of shadows at noon, the length of day and night, and the corresponding climate and biological phenomena. By the Western Han dynasty, the Huainanzi had largely fixed the names and order of the 24 terms.
When I was a kid I thought the solar terms were just the old calendar my grandmother hung on the wall. Only later did I realize that the restless nights around the Start of Spring, the stomach ache right after the Start of Autumn, and the sudden craving for lamb soup at the Winter Solstice were not coincidences. The body knows the terms before the mind does.
In TCM, the human body is not a machine of constant temperature and humidity; it is a living system that changes with the seasons. Spring generates, summer grows, autumn harvests and winter stores. Each phase has its own care priorities. Living in tune with the solar terms is not old-fashioned; it reduces the cost of fighting nature. As the Huangdi Neijing says, “Nurture yang in spring and summer, and yin in autumn and winter.” These eight words summarize the core idea of solar-term wellness.
What Are Solar Terms and Why Do They Still Matter?
Many people assume solar terms only matter to farmers and calendar enthusiasts, but that is not true. At their core, solar terms are a manual of natural rhythms: they tell us when yang qi begins to rise, when dampness peaks, when it is time to gather inward, and when it is time to store essence. Even if you live in a city, never farm, and rarely look at the sky, the changes of the solar terms still affect your sleep, mood, appetite and immunity.
For example, around the Start of Spring many people feel restless or have trouble sleeping; this is the Liver qi rising with the ascending yang. Around Major Heat, many feel drowsy and lose their appetite, a sign of damp-heat trapping the Spleen. Understanding solar terms is not about memorizing 24 names; it is about adjusting before your body has to “complain.”
This idea connects to our guides on Yin-Yang and the Five Elements and the nine TCM body constitution types: all of them emphasize flowing with nature rather than waiting for problems to appear.
Spring: Six Terms
Spring belongs to Wood and the Liver. The focus is “generation”: let yang qi rise smoothly and keep emotions flowing. Do not shed warm clothing too early in spring, and do not suppress emotions excessively, or Liver qi stagnation may affect the whole year.
| Solar Term | Time | Climate | Wellness Focus | Recommended Foods |
|---|---|---|---|---|
| Start of Spring | Feb 3-5 | Yang qi first rises; spring chill remains | Soothe liver qi, guard against wind and cold | Chives, scallions, bean sprouts, red dates |
| Rain Water | Feb 18-20 | Precipitation increases, dampness builds | Strengthen spleen, drain dampness | Coix seed, Chinese yam, red bean, crucian carp |
| Awakening of Insects | Mar 5-7 | Spring thunder returns, nature revives | Nourish liver and eyes, sleep early | Spinach, celery, eggs, goji berries |
| Spring Equinox | Mar 20-22 | Day and night equal, liver qi strong | Harmonize yin-yang, ease emotions | Toon, bamboo shoots, strawberries, honey |
| Pure Brightness | Apr 4-6 | Air clear and bright, liver qi peaks | Clear liver and brighten eyes | Shepherd’s purse, mugwort, green tea, white fungus |
| Grain Rain | Apr 19-21 | Rain nourishes grain growth | Strengthen spleen, drain dampness, prevent allergies | Winter melon, coix, lettuce, mulberries |
Summer: Six Terms
Summer belongs to Fire and the Heart. The focus is “growth”: calm the heart, clear summer heat and generate fluids. Summer is not about being as cold as possible; excessive cold can damage yang and make you prone to illness in autumn and winter.
| Solar Term | Time | Climate | Wellness Focus | Recommended Foods |
|---|---|---|---|---|
| Start of Summer | May 5-7 | Summer begins, yang floats outward | Nourish heart, clear fire, rise early | Mung beans, bitter melon, lotus seeds, watermelon |
| Grain Full | May 20-22 | Wheat grains fill, damp-heat intensifies | Clear heat-damp, light diet | Cucumber, bitter melon, red beans, duck |
| Grain in Ear | Jun 5-7 | Wheat harvest, rice planting; heat rises | Clear summer heat, take noon rest | Mung beans, lily bulb, lotus leaf, bayberry |
| Summer Solstice | Jun 21-22 | Longest day, yang at peak | Nourish yin, reduce fire, avoid heavy sweating | Bitter melon, lotus root, watermelon, sour plum drink |
| Minor Heat | Jul 6-8 | Heat builds, muggy and humid | Clear summer heat, boost qi, drink warm water | Winter melon, loofah, mung beans, coix |
| Major Heat | Jul 22-24 | Hottest time of year | Escape heat, generate fluids, food safety | Watermelon, mung bean soup, bitter melon, lotus leaf porridge |
Autumn: Six Terms
Autumn belongs to Metal and the Lungs. The focus is “gathering”: nourish yin, moisten the lungs and reduce expenditure. Autumn dryness often shows up as dry skin, dry throat and cough; this is the worst season for spicy, drying foods.
| Solar Term | Time | Climate | Wellness Focus | Recommended Foods |
|---|---|---|---|---|
| Start of Autumn | Aug 7-9 | Autumn cool begins, dryness arises | Moisten lungs, prevent dryness, less spicy more sour | Pear, lily bulb, white fungus, grapes |
| Limit of Heat | Aug 22-24 | Heat fades, cooler mornings/evenings | Nourish yin, moisten dryness, adjust schedule | Sesame, honey, lotus root, duck |
| White Dew | Sep 7-9 | Large day-night temperature difference | Guard against cold, protect lungs, warm spleen/stomach | Longan, Chinese yam, white radish, walnuts |
| Autumn Equinox | Sep 22-24 | Day and night equal, dryness prevails | Moisten dryness, nourish yin, calm emotions | Pear, apple, lily bulb, white fungus |
| Cold Dew | Oct 8-9 | Temperature drops, dew turns cold | Keep warm, protect yang, moisten lungs | Chestnuts, red dates, walnuts, lamb |
| Frost’s Descent | Oct 23-24 | First frost, chill deepens | Gentle tonification, warm stomach | Persimmon, radish, lamb, black sesame |
Winter: Six Terms
Winter belongs to Water and the Kidneys. The focus is “storage”: protect yang, nourish the kidneys and conserve energy for spring. Winter is not the season for weight-loss diets and late nights; a little more rest and earlier sleep are actually the best care you can give your body.
| Solar Term | Time | Climate | Wellness Focus | Recommended Foods |
|---|---|---|---|---|
| Start of Winter | Nov 7-8 | Winter begins, yang stores inward | Warm and support kidney yang, sleep early | Lamb, longan, walnuts, black sesame |
| Minor Snow | Nov 22-23 | First snow approaches, yin cold grows | Warm yang, dispel cold, protect kidneys | Lamb, chives, black beans, ginger |
| Major Snow | Dec 6-8 | More snow, severe cold | Tonify and store essence, avoid cold | Beef, lamb, walnuts, goji |
| Winter Solstice | Dec 21-23 | Shortest day, yin peaks yang returns | Protect yang, nourish kidneys | Lamb soup, tangyuan, walnuts, black sesame |
| Minor Cold | Jan 5-7 | Cold intensifies, yang first stirs | Warm kidneys, assist yang, keep warm | Ginger, lamb, longan, red dates |
| Major Cold | Jan 20-21 | Coldest time, prepare for spring | Warm spleen and kidneys, moderate tonics | Chicken, lamb, radish, Chinese yam |
Seasonal Wellness Framework
The 24 solar terms are not a burden of daily calculation; they are a reminder to live in tune with the season. You do not need to tonify or restrict foods at every term. Just grasp the big picture: nourish the Liver in spring, the Heart in summer, the Lungs in autumn and the Kidneys in winter. Adjust diet to seasonal temperature and sleep to the length of day and night.
The most practical habit is to spend ten minutes at the start of each season reviewing the climate and food suggestions for the next six terms, then add the relevant ingredients to your shopping list. This is easier to stick with than any complex regimen.
If you want to combine solar-term wellness more closely with daily meals, read our guide on food as medicine to learn how common kitchen ingredients match each season’s needs.
A Note from Bong
My father was an herbalist for forty years. Old neighbors called him “Old Bong the Herbalist.” His hands were rough from decades of weighing herbs and rolling pills, yet his palms were always dry and warm. As a child I hated following him into the pharmacy — the moment I stepped inside I was hit by a mixed smell of angelica, dried tangerine peel, mugwort and lily bulb. It was neither fragrant nor bitter, but after a while it made the back of your nose feel warm.
Around the Start of Autumn he would roll up the bamboo mats at home. I would say, “It’s only August, it’s still hot,” and he would answer, “If you keep sleeping on these, autumn cold will settle into your bones.” As soon as the Winter Solstice arrived he would start simmering lamb soup with angelica and ginger. The clay pot bubbled gently, filling the house with a smell that was bitter and warm at the same time. I used to think he was stubborn, even a little superstitious.
Then one summer I ate iced watermelon and cold drinks for more than ten days straight. Right after the Start of Autumn my stomach ached so badly I could not straighten up. He did not scold me. He brewed me a cup of brown-sugar ginger tea and said, “You turned your stomach into an ice cellar all summer; how do you expect your Spleen and Stomach to start work in autumn? Medicine can save an emergency, but the solar terms wait for no one.” The tea was so spicy it made me gasp, yet my stomach slowly loosened.
After that I believed him. The solar terms are not decorations on a calendar; they are rhythms the body actually follows. Every seasonal transition now reminds me of what he used to say: “A human being is not a machine; you cannot keep the same rhythm all year round.” The essence of solar-term wellness is simply admitting that we are part of nature. To learn more about my background and my father’s story, visit About Bong.
References
- Huangdi Neijing (Yellow Emperor’s Inner Canon) — the foundational classic that introduced the idea of “nurturing yang in spring and summer, and yin in autumn and winter.”
- Huainanzi — an early Western Han text that records the names and sequence of the 24 solar terms.
- China Meteorological Administration, official explanation of the 24 solar terms.
- World Health Organization, WHO Traditional Medicine Strategy 2014-2023.
FAQ
No. Solar terms are a natural schedule built from centuries of observation. Most people have felt restless in spring, lost their appetite in summer, had dry skin in autumn, or had cold hands and feet in winter. Solar-term wellness is not about worshipping the calendar; it is about not fighting the weather head-on.
Definitely not. If you tried to tonic-up at every one of the 24 terms, both your wallet and your body would give up. The key is to get the big picture right: get angry less in spring, avoid cold foods in summer, eat more moistening foods in autumn, and sleep early in winter. Direction matters more than last-minute fixes.
The overall direction is the same, but the details are very different. The south is damp and hot in spring and summer, so draining dampness is the main job. The north is dry and cold in autumn and winter, so moistening dryness and keeping warm come first. At the Start of Winter, Guangdong may still be in T-shirts while Northeast China is already eating lamb soup. One prescription does not fit every place.
Of course not. Solar-term wellness is daily maintenance, not medicine. When something is really wrong, go to the hospital. Do not expect a bowl of ginger soup to cure appendicitis.
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Start TestNot medical advice. Nothing on 5baba.com constitutes medical advice. It is solely personal experience and cultural observation, not diagnosis, treatment, or health guidance. If you have health concerns, please consult a qualified medical professional.