紀 (曆法)

是中國古代曆法時間單位。指之日數與60個干支紀日之最短循環週期[1]

文內注釋

  1. .卷93志第三《律曆下》: 日周於天,一寒一暑,四時備成,萬物畢改,攝提遷次,青龍移辰,謂之歲。歲首也,月首也。至、朔同日謂之,同在日首謂之,蔀終六謂之紀,朔又復謂之
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