ABCs of Tisha B'Av
B’Av falls on Shabbat or Sunday.)
Sundown marks the commencement of Tisha B'Av, where no eating or drinking is permitted until nightfall the following evening. It is also forbidden to bathe or wash, wear leather shoes, or engage in marital relations. We also do not learn Torah, except for texts relevant to Tisha B'Av and mourning – e.g. the book of Lamentations and Job, and certain sections of the Talmud (including the story of Kamtza and story of Kamtza and Bar Kamtza).
The Book of Eicha (Lamentations) Jeremiah's poetic lament over the destruction of Jerusalem and the First Temple, is read in the synagogue as part of the evening service. Special “Kinot” (elegies) are also recited, both at night and during the day.
Other mourning practices include sitting on a low chair (after midday, a regular chair permitted; see “Laws of Shoes and Chairs”. We also minimize business and leisure activities.
Following Tisha B'Av, all normal activities may be resumed, except for the following which are delayed until midday of the 10th of Av, because the burning of the Temple continued through the 10th of Av: haircuts, washing clothes, bathing, listening to music, and eating meat and wine.