The traditional Chinese calendar divides a year into 24

solar term A solar term is any of twenty-four periods in traditional Chinese calendar, Chinese lunisolar calendars that matches a particular astronomical event or signifies some natural phenomenon. The points are spaced 15° apart along the ecliptic and are ...

s.''Dàhán'', ''Daikan'', ''Daehan'', or ''Đại hàn'' () is the 24th solar term. It begins when the Sun reaches the

celestial longitude Astronomical coordinate systems are organized arrangements for specifying positions of satellites, planets, stars, galaxies, and other celestial objects relative to physical reference points available to a situated observer (e.g. the true horiz ...

of 300° and ends when it reaches the longitude of 315°. It more often refers in particular to the day when the Sun is exactly at the celestial longitude of 300°. In the

Gregorian calendar The Gregorian calendar is the calendar used in most parts of the world. It was introduced in October 1582 by Pope Gregory XIII as a modification of, and replacement for, the Julian calendar. The principal change was to space leap years di ...

, it usually begins around 20 January and ends around 4 February.

Date and time

References

{{DEFAULTSORT:Dahan (Solar Term) 24 Winter time