Dongzhi (solar term)

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The traditional Chinese calendar divides a year into 24 solar terms.[1] Dōngzhì, Tōji, Dongji, Tunji (in Okinawan), or Đông chí (in Vietnamese) is the 22nd solar term, and marks the winter solstice. The term begins when the Sun reaches the celestial longitude of 270° and ends when it reaches the longitude of 285°[disputeddiscuss]. In the Gregorian calendar, it usually begins around 21 December (22 December East Asia time) and ends around 5 January.

Dongzhi
Chinese name
Chinese冬至
Literal meaningwinter's extreme
(i.e. winter solstice)
Vietnamese name
Vietnamese alphabetđông chí
Chữ Hán冬至
Korean name
Hangul동지
Hanja冬至
Japanese name
Kanji冬至
Hiraganaとうじ

In common usage, Dongzhi more often refers to the particular day when the Sun is exactly at the celestial longitude of 270°.

Along with equinoxes, solstices (traditional Chinese: 至點; simplified Chinese: 至日; "extreme day") mark the middle of Traditional Chinese calendar seasons. Thus, in "冬至", the Chinese character "" means "extreme", which implies "solstices", and therefore the term for the winter solstice directly signifies the summit of winter, as "midwinter" is used in English.

Culture

China

Sunlight directed through the 17 arches of Seventeen Arch Bridge, Summer Palace, Beijing around winter solstice

In China, Dongzhi was originally celebrated as an end-of-harvest festival. Today, it is observed with a family reunion over the long night. In southern China, pink and white tangyuan are eaten in sweet broth to symbolise family unity and prosperity, whereas in northern China, the traditional Dongzhi food is jiaozi.[citation needed]

Korea

In Korea, the winter solstice is also called the "Small Seol," and there is a custom of celebrating the day. People make porridge with red beans known as patjuk (팥죽) and round rice cakes (새알심 saealsim) with sticky rice. In the past, red bean porridge soup was sprayed on walls or doors because it was said to ward off bad ghosts. In addition, there was a custom in the early days of the Goryeo and Joseon Period in which people in financial difficulty settled all their debts and enjoyed the day.[2]

Japan

In Japan, the name of the solar term is Tōji. On this day, it is customary to drink grapefruit hot water and eat pumpkin in certain places. White flowers begin to bloom around the winter solstice.[citation needed]

Pentads

Each solar term is divided into three pentads which are typically named after seasonal natural events. The pentads during Dongzhi are:[citation needed]

  • 蚯蚓結, 'Earthworms form knots', referring to the hibernation of earthworms.
  • 麋角解, 'Deer shed their antlers'
  • 水泉動, 'Spring water moves'

Date and time

Solar term
TermLongitudeDates
Lichun315°4–5 February
Yushui330°18–19 February
Jingzhe345°5–6 March
Chunfen20–21 March
Qingming15°4–5 April
Guyu30°20–21 April
Lixia45°5–6 May
Xiaoman60°21–22 May
Mangzhong75°5–6 June
Xiazhi90°21–22 June
Xiaoshu105°7–8 July
Dashu120°22–23 July
Liqiu135°7–8 August
Chushu150°23–24 August
Bailu165°7–8 September
Qiufen180°23–24 September
Hanlu195°8–9 October
Shuangjiang210°23–24 October
Lidong225°7–8 November
Xiaoxue240°22–23 November
Daxue255°7–8 December
Dongzhi270°21–22 December
Xiaohan285°5–6 January
Dahan300°20–21 January
Date and Time (UTC)
yearbeginend
辛巳2001-12-21 19:212002-01-05 12:43
壬午2002-12-22 01:142003-01-05 18:27
癸未2003-12-22 07:032004-01-06 00:18
甲申2004-12-21 12:412005-01-05 06:03
乙酉2005-12-21 18:342006-01-05 11:46
丙戌2006-12-22 00:222007-01-05 17:40
丁亥2007-12-22 06:072008-01-05 23:24
戊子2008-12-21 12:032009-01-05 05:14
己丑2009-12-21 17:462010-01-05 11:08
庚寅2010-12-21 23:382011-01-05 16:54
辛卯2011-12-22 05:302012-01-05 22:43
壬辰2012-12-21 11:112013-01-05 04:33
癸巳2013-12-21 17:112014-01-05 10:24
甲午2014-12-21 23:032015-01-05 16:20
乙未2015-12-22 04:452016-01-05 22:09
丙申2016-12-21 10:432017-01-05 03:54
丁酉2017-12-21 16:292018-01-05 09:47
戊戌2018-12-21 22:232019-01-05 15:41
己亥2019-12-22 04:172020-01-05 21:31
庚子2020-12-21 10:012021-01-05 03:22
辛丑2021-12-21 15:592022-01-05 9:14
壬寅2022-12-21 21:482023-01-05 15:05
癸卯2023-12-22 3:272024-01-05 20:49
甲辰2024-12-21 9:212025-01-05 02:33
Source: JPL Horizons On-Line Ephemeris System
Source for 2021-24: Hong Kong Observatory[3]

See also

References

Preceded by
Daxue (大雪)
Solar term (節氣) Succeeded by
Xiaohan (小寒)