戊寅元暦

Rule of calendar of the lunisolar calendar that 戊寅元暦 (ぼいんげんれき) was one of the Chinese calendars, and was ever used in China. It was edited by 傅仁均 (ふじんきん) of Tang and was taken effect for 46 years to 麟徳元年 (664 years) from (619 years) for Takenori two years of Tang. It is omitted and says 戊寅暦. Because I assume age (B.C. 163723) of 戊寅 4,348 years before 160,000 the upper cause (626 years) from a year of the twenty-third of the sexagenary cycles for Takenori nine years, there is this name. It is the first calendar adopted in Tonou morning.

I adopted 破章法 to put 249 leap months for 676 years and did 1 synodic month with 29 6901/13006 (≒ 7001295306010000000♠29.530601^[2]) days on 365 2315/9464 (≒ 7002365244610000000♠365.2446^1[1]) days in 1 solar year.

I used the regular conjunction method with the calendar adopted formally for the first time. But there was deep-rooted objection that large months might continue for 4 months by the regular conjunction method, and the flat Hajime method was used again (645 years) later for Jogan 19 years.

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Allied item

• Chinese calendar

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