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The solar term at 90° of solar longitude.
Also known as: Summer Solstice solar term
The Chinese solar term beginning when the sun reaches 90° of ecliptic longitude, around 21 June.
Marks the summer solstice, the sun's northernmost point, at 90 degrees of ecliptic longitude.
Contexts: History, Public information
Is the oldest determinable term in the set: the solstices can be measured with a gnomon and a shadow rule and were established long before the equal-interval scheme was imposed around them, so the twenty-four are a regularisation of two observed points rather than an invention from nothing.
Contexts: History, Public information
A written character pair set against a division of the year, marked on a Chinese calendar at the point the sun reaches 90° of ecliptic longitude.