Yushui (solar term)

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