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The traditional Chinese calendar divides a year into 24 . Lìqiū, Risshū, Ipchu, or Lập thu () is the 13th solar term. It begins when the Sun reaches the celestial longitude of 135° and ends when it reaches the longitude of 150°. It more often refers in particular to the day when the Sun is exactly at the celestial longitude of 135°. In the Gregorian calendar, it usually begins around August 7 and ends around August 23.
Liqiu signifies the beginning of autumn in East Asian cultures.
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| Source: JPL Horizons On-Line Ephemeris System | ||
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