World Peace Day is celebrated on November 17, 2015. Peace is a sign of harmony characterized by the lack of violence, conflict behaviors and the freedom from fear of violence. Commonly understood as the absence of hostility, peace also suggests the existence of healthy or newly healed interpersonal or international relationships, prosperity in matters of social or economic welfare, the establishment of equality, and a working political order that serves the true interests of all.
Many different theories of "peace" exist in the world of peace studies, which involves the study of conflict transformation, disarmament, and cessation of violence. The definition of "peace" can vary with religion, culture, or subject of study.
One definition is that peace is a state of balance and understanding in yourself and between others, where respect is gained by the acceptance of differences, tolerance persists, conflicts are resolved through dialog, people's rights are respected and their voices are heard, and everyone is at their highest point of serenity without social tension. (With material from: Wikipedia)