Welcome to Harmony Day School Harmony Day School is a preschool program firmly based on Montessori philosophy, materials and methods. Call 859-519-6759 for more information or visit www.harmonydayschool.com Located on 839 National Ave Children enrolled at Harmony Day School enjoy and benefit from time-proven Montessori ideas and practices that individually address the social, emotional, physical and academic development of each child.HDS inspires students to develop inner-discipline, self-assurance and a passion for learning by encouraging curiosity and problem solving in a carefully prepared and supportive environment.