The solar calendar used by the Jewish sect around the caves of Qumran used a perfect year of 364 days or 52 weeks. It may have used a cycle of 294 years reckoned to equal 293 solar years, which gives a mean solar year of 365.24232 days, but the actual leap rule used, if any, is unknown.
References[edit | edit source]
- Times of Israel, 2018-02-09: 2000-year old Dead Sea Scroll Deciphered, Revealing 2nd Temple Power Struggles
- Wikipedia: Qumran calendrical texts