This text explores the ontological definition of reality in relation to the phenomenon of happening. The author critically examines the tendency to reduce reality solely to what occurs, highlighting the risk of excluding entities that do not undergo the process of becoming. A central theme is the nature of an event as an integrated change in time, defined by its inherent beginning and end. The core argument rests on the distinction between external boundaries, imposed by an observer for the sake of clarity, and internal limits, which the event establishes and guarantees itself. This intrinsic integrity and autonomy in setting its own boundaries serve as the fundamental criterion for differentiating between true and false events, as well as between event-based and non-event-based happenings. The text encourages a careful investigation into the origins of structuring elements within the dynamics of reality, offering a deeper insight into the ontology of event-driven processes and the essential characteristics of integrated change.