The Archbishop of York is using the time to remember conflicts around the would especially across the Middle East.
He says he wants to show solidarity with all those who are suffering.
In advance of his vigil of 'Hope and Trust for the Peace of the World' he said: "Dearly beloved Disciples of Jesus Christ, wherever you are in the world, I beseech you, in the Name of our Lord, to join me in heart and mind for seven days of prayer and fasting for peace and justice in God's World.
"Please join me in praying especially for those places in our global village devastated by militarism, idolatry, dictatorships and abject poverty.
"One way of making our solidarity and commitment together to be instruments and makers of peace is to place white linen in our windows.
"All people of good will may do this! Be the change you want to see".
People are being invited to pray wherever they are and the Archbishop is encouraging individuals to have a white linen cloth at hand to serve as a reminder of peace.