Prayer toward the end of the day

“The ninth hour is enjoined on us as a necessary time of prayer by the Apostles themselves, in Acts, where we learn that Peter and John went up to the Temple at the ninth hour of prayer. When the day is over there comes thanksgiving for what we have been given during the day and for our achievements, and confession of our failures, our voluntary or involuntary misdeeds, and those perhaps unknown to us, whether in word or deed or in the heart itself, asking God’s mercy for all through our prayers. For a review of the past is a great help against falling again into similar faults.”

Saint Basil the Great
The Long Rules