The Dead Sea Scrolls was the name given the documents first discovered by Bedouins in 1946 in several caves in the Qumran area, southeast of Jerusalem [SL:29-30]. They were believed to have been written by Jews called the Essenes from about 250BCE to 70CE. They were held mostly by Jordanians in east Jerusalem until the Six-Day War in 1967 and then by lsraelis. However, the same group of scholars were examining them closely and it was not until the 1990s that they were open to all scholars. Nevertheless, a number of articles and books on the Dead Sea Scrolls were produced in the last fifty years-especially in the last decade. In these publications, there are a number of descriptions of what the Essenes used as calendars-especially the intercalated [52x7] 364-day solar one and the lunar [6x (29, 30)] 354-day one. We try to explain the details of these.