Tisha b'Av commemorates many calamities that befell the Jewish people on this day, but it focuses on the destruction of the First and Second Temples. Reform Jews hold varying perspectives on this day, as many do not hope for the rebuilding of the Temple: some look upon the destruction of the Temples and the Jews' expulsion from Israel as an opportunity to realize our mission to disseminate knowledge of God throughout the world; these people do not necessarily relate to Tisha b'Av as a day of mourning. Others believe that, regardless of one's perspective on the destruction of the Temples and diaspora, Tisha b'Av has resonance for us as a day to commemorate moments of sadness and tragedy for the Jewish people. For a more in depth discussion of Tisha b'Av and Reform Judaism, see JL 129-130.
The traditional prohibitions of Tisha B'Av are:
We do not wear a tallit or tefillin. After the Haftarah reading, recite Kinot. Some also chant Eicha, either after the Haftarah or at the end of the service.
Deuteronomy 4:25-40 (P 1342, RP 1191, WTC 1069)
Jeremiah 8:13-8:23 (P 1675, RP 1489)
It is at this service that Tallit and Tefillin are worn.
We add a Torah service (MT 104) after the Chatzi Kaddish (MT 57). The afternoon reading is the same as the morning reading.
After the Torah reading, we read the Haftarah for public fast days.
When we recite the Amidah on fast days, we replace Shalom Rav with Sim Shalom (MT 98).
Exodus 32:11-14 (P 647, RP 588), 34:1-10 (P 658, RP 593, WTC 503)
There is a special custom regarding the chanting of the following:
When the reader reaches these verses, the congregation recites the verses first. The reader then repeats them in High Holy Day cantillation. The rest of the portion is read in regular Torah cantillation.
Isaiah 55:6-56:8 (P 1681, RP 1489)