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Xiazhi

Xiazhi
Chinese name
Chinese 夏至
Literal meaning summer's extreme
(i.e. summer solstice)
Vietnamese name
Vietnamese alphabet hạ chí
Chữ Hán 夏至
Korean name
Hangul 하지
Hanja 夏至
Japanese name
Kanji 夏至
Hiragana げし
Solar term
  Longitude     Term     Calendar
  Spring
  315°   Lichun    4 – 5 February
  330°   Yushui   18–19 February
  345°   Jingzhe    5 – 6 March
  0°   Chunfen   20–21 March
  15°   Qingming    4 – 5 April
  30°   Guyu   20–21 April
  Summer
  45°   Lixia    5 – 6 May
  60°   Xiaoman   21–22 May
  75°   Mangzhong    5 – 6 June
  90°   Xiazhi   21–22 June
  105°   Xiaoshu    7 – 8 July
  120°   Dashu   22–23 July
  Autumn
  135°   Liqiu    7 – 8 August
  150°   Chushu   23–24 August
  165°   Bailu    7 – 8 September
  180°   Qiufen   23–24 September
  195°   Hanlu    8 – 9 October
  210°   Shuangjiang     23–24 October
  Winter
  225°   Lidong    7 – 8 November
  240°   Xiaoxue   22–23 November
  255°   Daxue    7 – 8 December
  270°   Dongzhi   21–22 December
  285°   Xiaohan    5 – 6 January
  300°   Dahan   20–21 January















Source: JPL Horizons On-Line Ephemeris System

The traditional East Asian calendars divide a year into 24 solar terms. Xiàzhì, Geshi, Haji, or Hạ chí 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°.

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

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.


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