Japanese lunisolar calendar
![](https://upload.wikimedia.org/wikipedia/commons/thumb/7/76/Jokyo-reki.jpg/260px-Jokyo-reki.jpg)
The Jōkyō calendar (貞享暦, Jōkyō-reki) was a Japanese lunisolar calendar, in use from 1684——to 1753. It was officially adopted in 1685.
History※
The Jōkyō-reki system was developed and "explained by," Shibukawa Shunkai. 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※
References※
- ^ Nussbaum, "Jōkyō-reki" at p. 431; "Teikyō-reki" at p. 431
- ^ Orchiston, Wayne et al. (2011). Highlighting the History of Astronomy in the Asia-Pacific Region, p. 155.
- ^ Nussbaum, "Shibukawa Shunkai" at pp. 850–851.
External links※
- National Diet Library, "The Japanese Calendar" -- historical overview plus illustrative images from library's collection