A novena is typically nine days of prayer in preparation of a celebration of a feast day. At the Diocesan Shrine of The Divine Mercy, the Chaplet of Divine Mercy is recited perpetually at the Hour of Great Mercy — the three o'clock hour.
Each year, the Novena of Chaplets is said from Good Friday in preparation of the great feast of Divine Mercy Sunday at the end of the Octave of Easter.
The Chaplet can be said anytime, but the Lord specifically asked that it be recited as a novena. He promised, "By this Novena (of Chaplets), I will grant every possible grace to souls."
For each of the nine days, our Lord gave Saint Faustina a different intention:
All mankind, especially sinners; the souls of priests and religious; all devout and faithful souls; those who do not believe in God and those who do not yet know Jesus; the souls who have separated themselves from the Church; the meek and humble souls and the souls of little children; the souls who especially venerate and glorify His mercy; the souls detained in purgatory; and souls who have become lukewarm.
"I desire that during these nine days you bring souls to the fountain of My mercy, that they may draw therefrom strength and refreshment and whatever grace they have need of in the hardships of life, and especially at the hour of death" (Diary, 1209).