Coined Chinese characters: The 24 solar terms, part 3
The chapter on "Calendar and Chronology" in Brill's Encyclopedia of China Online (2009) was authored by Ho Peng Yoke (1926-2014), who was the Director of the Needham Research Institute from 1990-2001. The first two paragraphs of Ho's chapter begin as follows:
The traditional Chinese calendar is lunisolar, i. e. it is based on both the movement of the moon and on what seems to be the orbit of the sun around the earth. The incommensurability of the lunar synodical period of 29.530587… days and the equinoctial year's 365.2421… days has always been the cause for numerous difficulties with respect to the establishment of a calendar in China. In order to replace the former calendars which after a time had lost their validity, roughly 100 different types of calendars were devised over a period of about 2000 years, many of which were never officially adopted. According to Joseph Needham, the history of calendar making is the consequence of attempts to "make the incompatible compatible."
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