17th of Tammuz

The Seventeenth of Tammuz is a Jewish fast day commemorating the breach of the walls of Jerusalem before the destruction of the Second Temple. It falls on the 17th day of the 4th Hebrew month of Tammuz and marks the beginning of the three-week mourning period leading up to Tisha B’Av.

The day also traditionally commemorates the destruction of the two tablets of the Ten Commandments and other historical calamities that befell the Jewish people on the same date.