Sothic cycle


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Related to Sothic cycle: Sothic year

Sothic cycle

[′sä·thik ‚sī·kəl]
(astronomy)
A time period of about 1460 years; this cycle is such that the New Year of the calendar used in ancient Egypt was in error by a whole year because the adopted year of 365 days is about a quarter of a day shorter than the mean solar year.