On Sunday during his Angelus address, Pope Francis announced a day of fasting and prayer for peace in Syria, to occur Saturday, September 7:
I appeal strongly for peace, an appeal which arises from the deep within me. How much suffering, how much devastation, how much pain has the use of arms carried in its wake in that martyred country, especially among civilians and the unarmed! I think of many children will not see the light of the future! With utmost firmness I condemn the use of chemical weapons: I tell you that those terrible images from recent days are burned into my mind and heart. There is a judgment of God and of history upon our actions which are inescapable! Never has the use of violence brought peace in its wake. War begets war, violence begets violence.
With all my strength, I ask each party in this conflict to listen to the voice of their own conscience, not to close themselves in solely on their own interests, but rather to look at each other as brothers and decisively and courageously to follow the path of encounter and negotiation, and so overcome blind conflict. With similar vigour I exhort the international community to make every effort to promote clear proposals for peace in that country without further delay, a peace based on dialogue and negotiation, for the good of the entire Syrian people.
Later on, he references Pacem in Terris, written by Pope John XIII:
What can we do to make peace in the world? As Pope John said, it pertains to each individual to establish new relationships in human society under the mastery and guidance of justice and love.
Finally, the details surrounding the day of fasting and prayer for peace in Syria:
To this end, brothers and sisters, I have decided to proclaim for the whole Church on 7 September next, the vigil of the birth of Mary, Queen of Peace, a day of fasting and prayer for peace in Syria, the Middle East, and throughout the world, and I also invite each person, including our fellow Christians, followers of other religions and all men of good will, to participate, in whatever way they can, in this initiative.
On 7 September, in Saint Peter’s Square, here, from 19:00 until 24:00 [1-6pm Eastern, 10am-1pm Pacific], we will gather in prayer and in a spirit of penance, invoking God’s great gift of peace upon the beloved nation of Syria and upon each situation of conflict and violence around the world. Humanity needs to see these gestures of peace and to hear words of hope and peace! I ask all the local churches, in addition to fasting, that they gather to pray for this intention.
My friends, there is no denying that the situation in Syria is grave. Action must be taken. But our action must be informed by the Gospel; we need to be instruments of justice and love. This Saturday, pray for peace in Syria, and let us always remember to pray for peace throughout the whole world.
Mary, Queen of Peace, pray for us.
Pax et bonum.