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The was a Japanese
"''Jōkyō-reki''"
at p. 431
"''Teikyō-reki''"
at p. 431 It was officially adopted in 1685.Orchiston, Wayne ''et al.'' (2011)
''Highlighting the History of Astronomy in the Asia-Pacific Region,'' p. 155
"Shibukawa Shunkai"
at pp. 850–851. He recognized that the length of the solar year is 365.2417 days. Shibukawa discovered errors in the traditional Chinese calendar, the ''Senmyō'' calendar, which had been in use for 800 years.
-- historical overview plus illustrative images from library's collection
{{DEFAULTSORT:Jokyo calendar Specific calendars History of science and technology in Japan Time in Japan
The was a Japanese lunisolar calendar
A lunisolar calendar is a calendar in many cultures, combining lunar calendars and solar calendars. The date of Lunisolar calendars therefore indicates both the Moon phase and the time of the solar year, that is the position of the Sun in the Ea ...
, in use from 1684 to 1753.Nussbaum"''Jōkyō-reki''"
at p. 431
"''Teikyō-reki''"
at p. 431 It was officially adopted in 1685.Orchiston, Wayne ''et al.'' (2011)
''Highlighting the History of Astronomy in the Asia-Pacific Region,'' p. 155
History
The ''Jōkyō-reki'' system was developed and explained byShibukawa Shunkai
born as Yasui Santetsu (), later called Motoi Santetsu (), was a Japanese scholar, go player and the first official astronomer appointed of the Edo period. He revised the Chinese lunisolar calendar at the shogunate request, drawing up the J ...
.Nussbaum"Shibukawa Shunkai"
at pp. 850–851. He recognized that the length of the solar year is 365.2417 days. Shibukawa discovered errors in the traditional Chinese calendar, the ''Senmyō'' calendar, which had been in use for 800 years.
See also
*Japanese calendar
Japanese calendar types have included a range of official and unofficial systems. At present, Japan uses the Gregorian calendar together with year designations stating the year of the reign of the current Emperor. The written form starts with t ...
* Sexagenary cycle
The sexagenary cycle, also known as the Stems-and-Branches or ganzhi ( zh, 干支, gānzhī), is a cycle of sixty terms, each corresponding to one year, thus a total of sixty years for one cycle, historically used for recording time in China and t ...
* Jōkyō
was a after '' Tenna'' and before ''Genroku.'' This period spanned the years from February 1684 through September 1688. The reigning emperors were and .Titsingh, Isaac. (1834). ''Annales des empereurs du japon'' p. 415./ref>
Change of era
* ...
References
External links
*National Diet Library
The is the national library of Japan and among the largest libraries in the world. It was established in 1948 for the purpose of assisting members of the in researching matters of public policy. The library is similar in purpose and scope to ...
, "The Japanese Calendar-- historical overview plus illustrative images from library's collection
{{DEFAULTSORT:Jokyo calendar Specific calendars History of science and technology in Japan Time in Japan