There are seven leap months in nineteen years; one solar year consists of 365 and 75 over 304 days (≒365.2467 days) and one synodic month consists of 29 and 399 over 752 days (≒29.530585 days). |
19年に7閏月を置き、1太陽年を365+75/304日(≒365.2467日)、1朔望月を29+399/752日(≒29.530585日)とする。 |