The Libraries for Peace (L4P) initiative promotes the role of libraries to advance peace internationally. This website and social media provide resources for libraries and others to learn about what libraries are doing to promote peace, how they can initiate their own efforts, and where these actions are taking place; to discuss and share ideas of libraries and peacebuilding; and to serve as an information hub for an international library celebration and action day for peace. This Libraries for Peace (L4P) Day calls on libraries and librarians around the world to annually observe International Day of Peace on 21 September, and to pledge to act to advance peace. This international web portal supports and promotes libraries and librarians to collectively promote, support, build on and celebrate our peacebuilding efforts.