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).

[2] 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.