1. The Qumran Calendar While several documents discovered at Qumran give schedules of events according to their calendar, the best descriptions of the workings of the calendar itself are probably found in the Book of Jubilees and the Book of Enoch.[3] Although those books are not included in our Bible today, both were held in high regard at Qumran, equal to others we now include in the Old Testament.
364 days each year, beginning on aWednesdayevery spring. It had four quarters of exactly13 weekseach, so that every quarter-year began on a Wednesday. Each quarter had three months, the first two having30 days, and the third having31 days. The months were numbered from 1 to 12, beginning in the spring. Thus, it had a feature desired by many modern businessmen: it was so tightly tied to the week that every day occurred on the same day of the week every year. In particular, their sacred feast days always occurred on the fixed days listed in Table 1.[4]
extra weekoften enough to keep this calendar aligned with the seasons, because some of the offerings, such as First Fruits, had to occur at certain seasons of the year, when the barley or wheat would be ripe. ・・・