Hōryaku calendar

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

Hōryaku calendar (宝暦暦, Hōryaku-reki) was a Japanese lunisolar calendar (genka reki).[1] It was also known as Horiki Kojutsu Gen-reki. It was published in 1755.[2]

History[change | change source]

The Hōreki 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]

Related pages[change | change source]

References[change | change source]

  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. 3.0 3.1 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.

Other websites[change | change source]