The traditional Chinese calendar divides a year into 24 solar terms.[1] Xiàzhì is the 10th solar term, and marks the summer solstice. It begins when the Sun reaches the celestial longitude of 90° and ends when it reaches the longitude of 105°. It more often refers in particular to the day when the Sun is exactly at the celestial longitude of 90°.

Xiazhi
Chinese夏至
Literal meaningsummer's extreme
(i.e. summer solstice)
Solar term
Term Longitude Dates
Lichun 315° 4–5 February
Yushui 330° 18–19 February
Jingzhe 345° 5–6 March
Chunfen 20–21 March
Qingming 15° 4–5 April
Guyu 30° 20–21 April
Lixia 45° 5–6 May
Xiaoman 60° 21–22 May
Mangzhong 75° 5–6 June
Xiazhi 90° 21–22 June
Xiaoshu 105° 7–8 July
Dashu 120° 22–23 July
Liqiu 135° 7–8 August
Chushu 150° 23–24 August
Bailu 165° 7–8 September
Qiufen 180° 23–24 September
Hanlu 195° 8–9 October
Shuangjiang 210° 23–24 October
Lidong 225° 7–8 November
Xiaoxue 240° 22–23 November
Daxue 255° 7–8 December
Dongzhi 270° 21–22 December
Xiaohan 285° 5–6 January
Dahan 300° 20–21 January

Date and timeEdit

Date and time (UTC),
by gregorian year from 2001 to 2020
Year Begin End
辛巳 2001-06-21 07:37 2001-07-07 01:06
壬午 2002-06-21 13:24 2002-07-07 06:56
癸未 2003-06-21 19:10 2003-07-07 12:35
甲申 2004-06-21 00:56 2004-07-06 18:31
乙酉 2005-06-21 06:46 2005-07-07 00:16
丙戌 2006-06-21 12:25 2006-07-07 05:51
丁亥 2007-06-21 18:06 2007-07-07 11:41
戊子 2008-06-20 23:59 2008-07-06 17:26
己丑 2009-06-21 05:45 2009-07-06 23:13
庚寅 2010-06-21 11:28 2010-07-07 05:02
辛卯 2011-06-21 17:16 2011-07-07 10:42
壬辰 2012-06-20 23:08 2012-07-06 16:40
癸巳 2013-06-21 05:03 2013-07-06 22:34
甲午 2014-06-21 10:51 2014-07-07 04:14
乙未 2015-06-21 16:40 2015-07-07 10:10
丙申 2016-06-20 22:35 2016-07-06 16:05
丁酉 2017-06-21 04:22 2017-07-06 21:51
戊戌 2018-06-21 10:06 2018-07-07 03:39
己亥 2019-06-21 15:56 2019-07-07 09:18
庚子 2020-06-20 21:45 2020-07-06 15:15
Source: JPL Horizons On-Line Ephemeris System

Western correlationEdit

In the Gregorian calendar, it usually begins around 21 June and ends around 7 July.

The solsticesEdit

The solstices (as well as the equinoxes) mark the middle of the seasons in traditional East Asian calendars. Here, the Chinese character means "extreme", which implies "solstices", so the term for the summer solstice directly signifies the summit of summer.

See alsoEdit

ReferencesEdit

  1. ^ Zhang, Peiyu; Hunag, Hongfeng (1994). "The Twenty-four Solar Terms of the Chinese Calendar and the Calculation for Them". Purple Mountain Observatory.
Preceded by
Mangzhong (芒種)
Solar term (節氣) Succeeded by
Xiaoshu (小暑)