A campus-wide program to highlight Catholic identity and mission, Community Day has been celebrated at Notre Dame of Maryland University every year since 1993. Featuring a keynote speaker, followed by an array of thematic workshops led by faculty, staff, and students, the event invites participants to reflect on Catholic Social Teaching, embedded in the Church's intellectual tradition, the liberal arts, and the professions. This article describes the origins, goals, and operational principles of the event, which together offer a simple but effective model readily adapted to other campuses. A selection of relevant scholarship on mission engagement frames the case study, which includes analysis of multi-year evaluative data, both quantitative and qualitative.