When Is Tisha B'Av 2024. Tisha b'av 2024 will begin in the evening of monday 12th aug, 2024 (12/08/2024) and ends in the nightfall of tuesday 13th aug, 2024 (13/08/2024). Tisha b’av is the saddest day on the jewish calendar, tisha b’av primarily commemorates the babylonian destruction of the first temple in 586 bce and the roman destruction of the second temple.

Tisha b’av begins at sundown on monday, august 12, and ends at nightfall on tuesday, august 13. The fast of tisha b’av is observed on the hebrew calendar date of 9 av (or 10 av, when 9 av is shabbat ).