In my siddur (Shelah, Shaar HaShamayim) it says that tikkun chatzos (specifically tikkun Rachel) is not said on days were tachanun is omitted. On Tisha B'Av we do not say tachanun. However it is hard ...
The kina (elegy, said on the ninth of Av) about Jeremiah's going to ask the avos to pray (kina 21 in at least some versions) is said before the one about Tziyon's telling him to do so (22). Why this ...