Jewish Calendar Av. The present jewish calendar is lunisolar, the months being reckoned according to the moon and the years according to the sun. Av is marked by the destruction of both the first and second temples in jerusalem, devastating events in jewish history.
Convert gregorian/civil and hebrew/jewish calendar dates. Av (אָב) is the 5th month of the hebrew year, has 30 days, and corresponds to july or august on the gregorian calendar.