An entity that has temporal parts and that happens, unfolds or develops through time.

As for process, history, process boundary, spatiotemporal region, zero-dimensional temporal region, one-dimensional temporal region, temporal interval, temporal instant.

(Elucidation) An occurrent is an entity that unfolds itself in time or it is the start or end of such an entity or it is a temporal or spatiotemporal region

An entity that has temporal parts and that happens, unfolds or develops through time.

077-BFO

occurrent