Yushui (solar term)
 |
| Term | Longitude | Dates |
|---|---|---|
| Lichun | 315° | 4–5 February |
| Yushui | 330° | 18–19 February |
| Jingzhe | 345° | 5–6 March |
| Chunfen | 0° | 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 |
The traditional East Asian calendars divide a year into 24 solar terms (節氣). Yǔshuǐ (pīnyīn), Usui (rōmaji), or Usu (romaja) (Chinese and Japanese: 雨水; Korean: 우수; Vietnamese: Vũ thủy; "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
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