What is time? Bonaventure's concept of time should be viewed in the context of the academic discourse of the 13th century. The Franciscan speaks as a theologian, explicitly acknowledging the philosophical aspect of this question. This is particularly evident in his positioning regarding the intellectual contributions of Aristotle and Augustine. His nuanced concept of time carefully distinguishes between the uncreated eternity of God (aeternitas) and various temporal measures of created being. Among these, tempus and aevum not only characterize different types of duration, but they also express a distinct dignity of the underlying being. This reflects the true significance of the question of time for Bonaventure, which, especially in relation to the beginning, middle, and end of time, reveals a certain consequence.