The traditional East Asian calendars divide a year into 24 solar terms is the 19th solar term.It begins when the Sun reaches the celestial longitude of 225 degree and ends when it reaches the longitude of 240 degree.It more often refers in particular to the day.When the sun is exactly at the celestiallongitude of 225 degree.In the Gregorian calendar,it usually begins around November 7 and ends around November22.