When Is The 9th Of Av 2024. The fast of tisha b'av is observed on the hebrew calendar date of 9 av (or 10 av, when 9 av is shabbat ). The ninth of av, or tisha b’av, is a major day of mourning in judaism that involves fasting.
Ninth of av in hebrew calendar. It is the culmination of the three weeks, a period of time.