In more detail
The other twelve markers, called zhōngqì, alternate with the jié and do not start BaZi months. These solar boundaries are distinct from the new moons that begin lunar calendar months.
Twenty-Four Solar Terms · Jie Qi
The characters
- 节jiéjoint; node; a division of time
- 气qìair; breath; climate
Together, 节气 reads “joints of the climate”: the points that divide the year by its weather.
Sources
- 三命通会 卷二 · 论四时节气:节与中气;论遁月时
- Hong Kong Observatory · The 24 Solar Terms: minor and major terms; solar longitudes
These terms describe a traditional symbolic framework. Chart interpretation and our naming method remain experimental.