This article examines the nature of school days and school years in later medieval Western Europe and considers the societal functions of the temporal cultures that emerged. The forms of the school day and year in elementary and grammar schools--alongside school-and youth-centered festivals--were replete with meaning and possessed utility beyond simple responses to environmental factors such as seasonal and meteorological changes. School authorities--whether ecclesiastical or municipal--saw the temporal cultures of medieval schools as a means to socialize children and to create and maintain collective community identities. By exploring a range of different traditions and regional variations, it is clear that the experience of the passage of time was imbued with meaning and social significance for medieval schoolchildren and their communities.