When Are The 9 Days Of Av 2025. The fast of tisha b'av is observed on the hebrew calendar date of 9 av (or 10 av , when 9 av is shabbat ). Tisha b'av is celebrated in the hebrew.

The nine days of av begin on rosh. Tish’a b’av for hebrew year 5785 begins at sundown on saturday, 2 august 2025 and ends at nightfall on sunday, 3 august 2025.