Today we begin the “Three Weeks” of mourning for the destruction of the Beit Hamikdash. We start this period with the Fast of the Seventeenth of Tammuz.
From today, it is forbidden to listen to music. No shaving or haircuts. No weddings or celebrations. It is forbidden to say the blessing of שהחיינו. Therefore, shopping for new clothes is also forbidden.
Five events occurred on שבעה עשר בתמוז. Moshe broke the tablets on this day. The siege of Jerusalem began as well. The קרבן תמיד, daily sacrifice, ceased in the Temple. Turnusrupus burned a Torah scroll. And an idol was placed in the Heichal.
During the second Temple period, this and the other fast days became days of celebration. This was only a temporary situation. May these fast days become permanent days of celebration.