Great calendar - Daitoureki

Japanese: 大統暦 - だいとうれき

〘Noun〙 A calendar from the Ming dynasty in China. It was created by Yuantong, a Ming dynasty clock scientist, and its origins date back to the 17th year of the Hongwu era under Emperor Taizu ( 1384 ). It was in use for over 200 years until the end of the Ming dynasty. In Japan, in 1684 , the Xuanming calendar, which had many errors, was abolished and an imperial decree for calendar reform was issued on March 3rd, with the Daitong calendar being distributed on April 29th. However, Shibukawa Harumi claimed that the Daitong calendar was inaccurate and proved this through experiments, so on October 29th of the same year, another imperial decree for calendar reform was issued and the Jokyo calendar, invented by Harumi, was adopted as the new calendar. ※The Jōkyō calendar (1822) (Kojiruien, Hogi 5) "According to this, the calendar _can _{_{be changed}} , and last spring, _{the two} Great _Unified Calendars can be _used , _but _it was announced that _{the two} Great _Unified Calendars would be _stopped and _{the new} calendars _would be used, and the _name of the Jōkyō calendar can be _changed ." [Continued Documents and General Thoughts - Shoui Ko, Koho _{no Hō} (History of Ancient Laws)]

Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information

Japanese:

〘名〙中国の明代の暦。明の漏刻博士元統が作ったもので、太祖の洪武一七年（一三八四）を暦元とする。以来明末までの二百数十年間にわたって施行された。日本では貞享元年（一六八四）、誤差の多くなった宣明暦を廃して大統暦を採用しようとして三月三日改暦の宣旨を発し、四月二九日大統暦を頒行した。しかし渋川春海は大統暦を不正確と主張し、実験によってそれを証明したので、同年一〇月二九日再び改暦の宣旨が出て春海の創意による貞享暦が新暦として採用された。※貞享暦（1822）一（古事類苑・方技五）「依_レ改_レ暦、去春可_レ被_レ用_二大統暦_一由雖_レ被_二宣下_一止_二大統暦_一用_二新暦_一、可_レ号_二貞享暦_一」〔続文献通考‐象緯考・古法沿革〕

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