The international Day of Prayer for Peace on 21 September is part of a growing movement in opposition to religiously-sanctioned violence.
Or any kind of officially-sanctioned violence, really.
But there is also a recognition that praying and working for change is no easy matter. It involves deep conviction, tough thinking, demanding faith and hopeful action. There's no room for smugness or complacency.
Resources are available here: http://overcomingviolence.org/en/about-dov/international-day-of-prayer-f... 
Further details: http://www.ekklesia.co.uk/node/5500