I came across this devotion, to be said daily at 3:00 p.m.:
In His revelations to Saint Faustina, Jesus encouraged the following devotional practice:
“At three o’clock, implore My mercy, especially for sinners; and if only for a brief moment, immerse yourself in My Passion, particularly in My abandonment at the moment of agony: This is the hour of great mercy for the whole world. I will allow you to enter into My mortal sorrow. In this hour, I will refuse nothing to the soul that makes a request of Me in virtue of My Passion.”(Diary, 1320).