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The solar term at 0° of solar longitude.
Also known as: Spring Equinox solar term
The Chinese solar term beginning when the sun reaches 0° of ecliptic longitude, around 20 March.
Marks the spring equinox, the point at which the sun crosses the celestial equator northward, at 0 degrees of ecliptic longitude.
Contexts: History, Public information
Is the origin of the whole scheme: ecliptic longitude is measured from this point, so every other term's defining number is stated relative to it and the set has a zero rather than a first.
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 0° of ecliptic longitude.