The traditional Chinese calendar divides a year into 24 solar terms. Mángzhòng, Bōshu, Mangjong, or Mang chủng (neologized term, unknown in vietnam, just popularized recently) is the ninth solar term. It begins when the Sun reaches the celestial longitude of 75° and ends when it reaches the longitude of 90°. It more often refers in particular to the day when the Sun is exactly at the celestial longitude of 75°. In the Gregorian calendar, it usually begins around June 5 (June 6 East Asia time) and ends around June 21.
