Feast day dedicated to peace. It first observed on 1 January 1968, proclaimed by Pope Paul VI. It was inspired by the encyclical Pacem in Terris by Pope John XXIII and with reference to Paul‘s encyclical Populorum Progressio. Popes have used this day to make magisterial declarations relevant to the social doctrine of the Church on such topics as the United Nations, human rights, women’s rights, labor unions, economic development, the right to life, international diplomacy, peace in the Holy Land, globalization and terrorism.
- Pacem in Terris, by Pope John XIII
- Papal Messages
- United States Conference of Catholic Bishops
- “World Day of Peace“. Saints.SQPN.com. 31 December 2013. Web. 1 October 2014. <>