Yushui (solar term)

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; 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

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