Yushui (solar term)

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"Usui" redirects here. For other uses, see Usui (disambiguation).
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 (節氣). Yǔshuǐ (pīnyīn) or Usui (rōmaji) (Chinese and Japanese: 雨水; Korean: 우수; Vietnamese: Vũ thủy; literally: "rain water") is 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)