(Q592891)

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Symmetry454

calendar with mean year =365+71/293 days

Sym454

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defining formula

\operatorname {IsLeapYear} (y)={\begin{cases}\top &52y{\bmod {2}}93\in \{147,148,\dotsc ,198\}\\\bot &52y{\bmod {2}}93\not \in \{147,148,\dotsc ,198\}\end{cases}}

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WikiProject Mathematics

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publication date

28 October 2013

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