Yushui (solar term)

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Yushui
Chinese name
Chinese 雨水
Literal meaning rain water
Vietnamese name
Vietnamese alphabet vũ thủy
Chữ Hán 雨水
Korean name
Hangul 우수
Hanja 雨水
Japanese name
Kanji 雨水
Hiragana うすい
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

The traditional East Asian calendars divide a year into 24 solar terms. Yǔshuǐ, Usui, Usu, or Vũ thủy is the 2nd solar term. It begins when the Sun reaches the celestial longitude of 330° and ends when it reaches the longitude of 345°. It more often refers in particular to the day when the Sun is exactly at the celestial longitude of 330°. In Gregorian calendar, it usually begins around 18 February (19 February East Asia time) and ends around 5 March.

Pentads[edit]

Date and Time (UTC)
year begin end
辛巳 2001-02-18 14:27 2001-03-05 12:32


壬午 2002-02-18 20:13 2002-03-05 18:27


癸未 2003-02-19 02:00 2003-03-06 00:04


甲申 2004-02-19 07:50 2004-03-05 05:55


乙酉 2005-02-18 13:31 2005-03-05 11:45


丙戌 2006-02-18 19:25 2006-03-05 17:28


丁亥 2007-02-19 01:08 2007-03-05 23:18


戊子 2008-02-19 06:49 2008-03-05 04:58


己丑 2009-02-18 12:46 2009-03-05 10:47


庚寅 2010-02-18 18:35 2010-03-05 16:46


辛卯 2011-02-19 00:25 2011-03-05 22:29


壬辰 2012-02-19 06:17 2012-03-05 04:21


癸巳 2013-02-18 12:01 2013-03-05 10:14


甲午 2014-02-18 17:59 2014-03-05 16:02


Source: JPL Horizons On-Line Ephemeris System

Each solar term can be divided into 3 pentads (候). They are first pentad (初候), second pentad (次候) and last pentad (末候). Pentads in Yushui including:

China
  • First pentad: 獺祭魚, 'Otters make offerings of fish'. As fish begin to swim upstream, they are hunted by otters, which are believed to offer the fish to heaven.
  • Second pentad: 鴻雁來, 'The wild geese arrive'. Wild geese begin to make their northward migration, following the onset of spring.
  • Last pentad: 草木萌動, 'Trees and grass put forth shoots'.
Japan
  • First pentad: 土脉潤起
  • Second pentad: 霞始靆
  • Last pentad: 草木萠動
Preceded by
Lichun (立春)
Solar term (節氣) Succeeded by
Jingzhe (驚蟄)