The book’s most distinctive feature is its division of history into "Jubilees"—periods of 49 years (seven "weeks of years").

The author often alters biblical stories to protect the moral reputation of figures like Abraham and Jacob, omitting or re-explaining moments of deception or questionable behavior. Historical and Religious Context The Book of Jubilees

It strongly promotes a 364-day solar calendar , arguing that the lunar calendar causes festivals to be celebrated on the wrong days.