My father’s sraddha tithi is Avani Saptami. In this year’s panchangam, Saptami is shown to occur on three days of Avani (Avani 2nd, 17th and 32nd days). From these days, on which days must the sraddham be performed? Usually my father’s tithi occur one day before Gokulashtami. Kindly clarify the confusion regarding the tithi.