Yes, it starts on Good Friday and ends on the eve of Divine Mercy Sunday, on a Saturday. Just by typing Divine Mercy Novena will get you any website if you wish to go to the internet. If you like to know Divine Mercy Sunday has a great promise attached to it. Our Lord Jesus promises complete forgiveness on that day with all your purgatory wiped out. All is necessary for you that is all is required of you is Confession and reception of Holy Communion and I will like to add some act of mercy towards your neighbour. An act of mercy can include the Chaplet of the Divine Mercy. Our Lord Jesus will be pleased to cancel all your purgatory time and grant many other Graces as well. Anyone participating the Divine Mercy Sunday celebrations will be given these Graces so if they died suddenly right after Communion they will go directly to Heaven since their Purgatory time is now nullified and wiped out. You can make your Confession at least 8 days before Divine Mercy Sunday. St.Maria Faustina made her Confession the week before. The Novena and Divine Mercy Sunday can go hand to hand. Celebrate both so that Our Lord Jesus can dispense His Grace. God Bless you and to all those who will celebrate the Novena and the Divine Mercy Sunday!