 Tachanun is invariably followed by "half "kaddish"" in the morning and by "full "kaddish"" in the afternoon.The Talmud (Bava Kamma) marks Monday and Thursday as ""eth ratzon"", a time of Divine goodwill, on which a supplication is more likely to be received.On Monday and Thursday mornings, therefore, a longer prayer commencing with Psalms 78