24 Solar Terms Date Lookup Calculator
Enter any date to find which of the 24 solar terms it falls in — now with the exact astronomical moment each term begins, accurate to the minute. Covers 1950 to 2100.
Select a date between 1950 and 2100
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For reference only — solar terms are astronomical calendar markers, not astrological signs. Zodiac cross-reference is based on ecliptic position.
How the Calculation Works
Each solar term begins at the precise moment the sun reaches a multiple of 15° along the ecliptic. Our table covers every term from 1950 to 2100, computed from VSOP87-derived solar longitude and verified against published equinox and solstice instants to within one minute.
A Note on Time Zones
The traditional calendar date of a solar term is defined by Beijing time (UTC+8). The same instant can fall on a different calendar date elsewhere — for example, a term that begins at 11 p.m. in Beijing on February 3rd begins on the evening of February 2nd in London. This calculator always uses the traditional Beijing-time convention.
Solar Terms vs Zodiac Signs
Each solar term falls within a Western zodiac sign based on its ecliptic position. For example, Spring Equinox (0° solar longitude) aligns with the start of Aries. This cross-reference is provided for convenience only.