Hōryaku calendar

The Hōryaku calendar (宝暦暦, Hōryaku-reki) was a Japanese lunisolar calendar (genka reki).[1] It was also known as Hōryaku Kōjutsu Gen-reki (宝暦甲戌元暦). It was published in 1755.[2]

Hōryaku calendar published in 1755. Exhibit in the National Museum of Nature and Science, Tokyo, Japan.

History

The Hōryaku Kōjutsu Genreki system was the work of Abe Yasukuni,[3] Shibukawa Kōkyō,[4] and Nishiyama Seikyū.[5] Errors in the calendar were corrected in 1798[6] and in 1844.[7] In 1872, the Western calendar was adopted.[3]

See also

References
  1. Renshaw, Steven L. and Saori Ihara. (2007). "Takahashi, Yoshitoki," Biographical Encyclopedia of Astronomers (Virginia Trimble, ed.), p. 1121.
  2. Nussbaum, Louis-Frédéric. (2005). "Calendar" in Japan Encyclopedia, p. 98.
  3. Nussbaum, "Abe Yasukuni" at p. 4.
  4. Nussbaum, "Shibukawa Shunkai" at p. 850.
  5. Nussbaum, "Hōreki Kōjutsu Genreki" at p. 352.
  6. Nussbaum, "Kansei-reki" at p. 478; Orchiston, Wayne et al. (2011). Highlighting the History of Astronomy in the Asia-Pacific Region, p. 155.
  7. Orchiston, p. 155.
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