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24 Solar Terms · 二十四節氣

The real Chinese calendar. Every term, precise to the second, with its classical meaning.

The 24 Jié Qì divide the solar year into fortnightly terms, each marking a 15° arc of the sun's ecliptic motion. Classical Chinese feng shui, agriculture, medicine, and ritual all pivot on these terms — not Gregorian months, not lunar months. We use a verified astronomical library to place each term to the second, then pair it with the classical practice and feng shui guidance drawn directly from Yuè Lìng (月令, Liji) and the other primary-source authorities. Most modern tools give you a date; we give you the term, the element, the yin-yang polarity, the Bazi month branch, and what the ancients actually did on that day.

Try an example

Step 1 of 2: Which year's solar calendar?

Step 1 of 2

Which year's solar calendar?

What This Tool Does

  • +Full 24-term annual calendar with second-precision astronomical timestamps
  • +Current term lookup: given any date, returns days-into and days-to-next
  • +Season element (Wood / Fire / Earth / Metal / Water) and yin-yang polarity for each term
  • +Bazi month branch (地支) each term opens — essential for Four Pillars work
  • +Classical meaning, agricultural/ritual practice, and feng shui guidance for every term
  • +Primary-source citation: Yuè Lìng, Lǚ Shì Chūn Qiū, Huainanzi, Qi Min Yao Shu

How to Use

  1. 1Enter a year to get the full 24-term calendar for that year
  2. 2Optionally add a month and day to see the current term with days-into and days-to-next
  3. 3Each term shows its classical meaning, practice, and feng shui guidance
  4. 4Cross-reference the Bazi month branch with your Four Pillars chart

Classical Basis

“「立春之日，天子親帥三公九卿諸侯大夫以迎春於東郊」 — On the day of Lì Chūn the Son of Heaven personally leads his court to welcome spring in the eastern suburbs.”

Source: 月令 Yuè Lìng, in 禮記 Lǐjì (compiled Han dynasty)

“「春分而雷行，秋分而雷藏」 — At Spring Equinox thunder walks; at Autumn Equinox thunder hides.”

Source: 淮南子·天文訓 Huainanzi — Tianwen Xun (139 BCE)

“「一陽來復」 — At Winter Solstice a single yang line is reborn.”

Source: 周易·復卦 Zhou Yi, hexagram 24 Fu

Common Use Cases

  • +Date selection (擇日 zé rì) for moving, marriage, or groundbreaking
  • +Aligning feng shui activation with the term's governing element
  • +Pairing with Bazi: the month branch comes directly from the term boundaries
  • +Understanding traditional Chinese medicine timing (seasonal tonics, moxibustion windows)
  • +Agricultural planning in traditional or biodynamic practice

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