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夏曆 (古六曆)

夏曆》屬於陰陽曆,是中國古代曆法古六曆的一種。採用十九年七閏法,1太陽年日(=365.25日)(四分法)、1朔望月日(≒29.53086日)。以春正月為歲首,十二月為歲末,閏月置於年終。

夏曆的測制年代,經近人白光琦推算,在西元前422年時夏曆朔旦與天密合,即使尚有誤差也在西元前422年正負32年之間,行用約在三晉為侯前後。[1]

文內注釋

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  1. ^ 白光琦. 夏曆的測制年代. 《先秦年代探略》2008年 134頁. 
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夏曆 (古六曆)
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