Under this calendar, the year begins on any date between January 20 and February 20
of the Gregorian year. It has 12-month years (354 or 355 days) and 13-month years
(383 to 385 days). It is adjusted to the solar calendar over a 60-year cycle by adding
an extra month 22 times.
Prior to 1911, years were numbered according to the years of an emperor's reign. (For
example, KS 32-3-15 is the 32nd year of the reign of the Emperor Kwong Sui, or April
8, 1906). In 1911, the year designation was changed to that of the Chinese Republic
(CR) but the same principle was used.