When Is Tu B'Av 2024. Tu b’av is the 15th of the hebrew month of av (which takes place in the late summer). In ancient times, the 15th of.
Tu b’av there were no holidays as joyous for the jewish people as the fifteenth of av and yom kippur.” (mishnah, taanit) nowadays, on the fifteenth of av, we observe a. The fifteenth of av, 45 days in advance of rosh hashanah, is considered.