The medieval calendar served as a map of the Church year. While following the method of the Roman calendar in determining dates, it also listed saints' days and other religious feasts and recorded the phases of the moon. Many calendars also featured related illustrations of saints, feasts, monthly labors, leisure activities, and signs of the zodiac.
Since 1966, the International Society for the Study of Time (ISST) has been providing a framework for an interdisciplinary dialogue about the nature of time. KronoScope, edited by an international board of scholars, carries forward the work of ISST.