World War I Centennial Mass

St. John Paul II National Shrine, 3900 Harewood Road, N.E., Washington, D.C.; 10:30 a.m. ceremony, 11 a.m. Mass; hosted by Archdiocese for the Military Services and the Knights of Columbus; principal celebrant Archbishop William E. Lori, homilist Archbishop for the Military Services Timothy P. Broglio; business attire or military equivalent; marking 100th anniversary of end of World War I; RSVP at kofc.org/ww1Mass