How Many Days Are In The Hebrew Calendar. If both have 30 days, it is complete (sh'lema) or excessive; The jewish calendar lunisolar structure.

In the jewish calendar, since the lunar cycle is about 29.5 days, all months are either 29 days (known as “missing” months) or 30 days (known as “complete” months). The number of days, per month, in any given season (spring, summer, fall, winter) follows the pattern of 30 days (1st month in the season), 30 days (2nd month in the season), and 31 days (3rd month in the season).