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A solar term is any of 24 points in traditional Chinese lunisolar calendars that matches a particular astronomical event or signifies some natural phenomenon.The points are spaced 15° apart along the ecliptic and are used by lunisolar calendars to stay synchronized with the seasons, which is crucial for agrarian societies.


The solar terms are also used to calculate intercalary months in Chinese calendar which month is repeated depends on the position of the sun at the time.





Chinese Calendar 24 Solar Terms 2021





Sun's
ecliptical
longitude
Chinese
name&pinyin
Gregorian Date
2021
Remark
315° 立春 lìchūn Feb 3, 2021 spring begins
330° 雨水 yǔshuǐ Feb 18, 2021 more rain than snow
345° 驚蟄 (惊蛰) jīngzhé Mar 5, 2021 hibernating insects awaken
春分 chūnfēn Mar 20, 2021 spring center (equinox)
15° 清明 qīngmíng Apr 4, 2021 clear and bright
30° 穀雨 (谷雨) gǔyǔ Apr 20, 2021 wheat rain
45° 立夏 lìxià May 5, 2021 summer begins
60° 小滿 (小满) xiǎomǎn May 21, 2021 creatures plentish
75° 芒種 (芒种) mángzhòng Jun 5, 2021 seeding millet
90° 夏至 xiàzhì Jun 21, 2021 summer maximum (solstice)
105° 小暑 xiǎoshǔ Jul 7, 2021 a bit sweltering
120° 大暑 dàshǔ Jul 22, 2021 most sweltering
135° 立秋 lìqiū Aug 7, 2021 autumn begins
150° 處暑 (处暑) chǔshǔ Aug 23, 2021 heat withdraws
165° 白露 báilù Sep 7, 2021 dews
180° 秋分 qiūfēn Sep 23, 2021 autumn center (equinox)
195° 寒露 hánlù Oct 8, 2021 cold dews
210° 霜降 shuāngjiàng Oct 23, 2021 frost
225° 立冬 lìdōng Nov 7, 2021 winter begins
240° 小雪 xiǎoxuě Nov 22, 2021 snows a bit
255° 大雪 dàxuě Dec 7, 2021 snows a lot
270° 冬至 dōngzhì Dec 21, 2021 winter maximum (solstice)
285° 小寒 xiǎohán Jan 5, 2021 a bit frigid
300° 大寒 dàhán Jan 20,2021 most frigid