Hōryaku calendar

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

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]

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. ↑ 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.

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