 Uwe Glessmer has proposed on the basis of 4Q319 ("Otot") that the calendar was in fact intercalated, a week being added every seven years to keep it synchronised with the solar year.Roger Beckwith suggested that the discrepancy between the calendar and the true year, though noticed, may not have been of concern to the community that used the calendar.The "Mishmarot" are texts which outline the weekly courses of the twenty-four priestly families who perform duties in the temple.