Daula (month)
Daula () is the first month of the Mandaean calendar. The month begins with Dehwa Rabba, or New Year's Day. The Feast of the Great Shishlam is celebrated on the sixth day of the month. It is the Mandaic name for the constellation Aquarius. It currently corresponds to Jul / Aug in the Gregorian calendar due to a lack of a leap year in the Mandaean calendar. References

Months of the Mandaean calendar
Aquarius in astrology