This text explores the ontological structure of an event as an integrated whole. Rather than a mere linear sequence of moments, an event is characterized by an internal integrity where its beginning and end are present throughout its duration. The author introduces the key concepts of "pastness" (bylost) and "futureness" (budost) to denote the event's own appropriated past and future, distinguishing them from general past and future states. Within the unfolding of an event, a continuous transformation occurs: the actual presence integrates futureness and transforms it into pastness. This dynamics necessitates a distinction between the happening of the event as a whole and the internal transformations of its temporal dimensions. The actual presence holds a privileged position in this process, as it serves as the necessary point of actualization for both pastness and futureness. Ultimately, the text suggests that through this constant integration of its temporal components, the event constitutes itself as a subject. This conceptual framework provides a profound insight into temporality and subjectivity within process-oriented philosophy.