I'm researching various sources regarding the Qumran calendar. I don't understand why there was a concern for incorporating the 24 priestly "watches" (mishmarot) (Refer to I Chronicles 4 for the names.) as part of the calendar arrangement.
Where these people Cohanim, or was there some other belief or motive that this needed to be included?
Refer to this article for an overview of the Qumran calendar structure.