... It was known already when Dillmann published the first modern translation and text of Jubilees that 364 as the number of days in a year was not unique to Jubilees, since the angel Uriel reveals a calendar of the same length to Enoch in 1 Enoch 72:32 (and through the entire chapter) as well as in 74:10, 12; 75:2; 82:6. As several passages in the astronomical chapters of 1 Enoch disclose, the writer is defending the thesis that the year consists of 364 days against others who advocate one of 360 days (with twelve months of thirty days each; 75:1-3; 82:4-7). 1 Enoch 72—82 and especially the Aramaic remains of the book (4Q208—211) show that the Enochic astronomical work devoted a great deal of attention to the moon and did not reject it from calendar calculations as Jubilees does. Moreover, the Enochic writer defines the length of the months in the 364-day calendar (and in the lunar one), unlike the author of Jubilees, who never explicitly indicates how long a month lasts. The calendar texts from Qumran demonstrate that, like Enoch, the writers used both a solar calendar of 364 days in a year (the number is stated and fully preserved in 4Q252 ii:3 and 11Q5 xxvii:5—6) and a lunar “year” of 354 days. ...