Tisha B'Av (The Fast of the Ninth of Av)marks the end of a three week period of mourning, starting with the fast of the 17th of Tammuz.
It is a day of intense sadness commemorating the destruction of the first and second temples. The first temple was destroyed by the Babylonians in 586 B.C.E. The second temple was devastated by the Romans in 70 C.E.
Many other tragedies happened on this day, most notably the expulsion of the Jews from Spain in 1492.
The prohibitions on Tisha B'Av...(more