The article recovers the earlier meaning of event as found in Alfred North Whitehead’s works, Principles of Natural Knowledge and Concept of Nature. In the early Whitehead, the event is considered as the metaphysical ultimate; such that events are the metaphysical building blocks in order to account for the temporal and spatial extensiveness of reality. The recuperation of the pre-PR concept of event is expressive of a dynamic of extending over, or passing into, of one event to another. This dynamic is explicitly absent in the actual occasion of Process and Reality, after Whitehead’s “turn to atomism.”