The theoretical model of the primordial event represents the smallest, indivisible "quantum" of internally unified happening, characterized by a beginning, a duration, and an end. An isolated primordial event does not belong to our world; instead, the universe is built upon real relationships and mutual reactions between these events. Any event that neither responds to others nor triggers a subsequent reaction leaves no trace and effectively never occurred for the world. The genesis of a world requires a minimum density of such events and their reactibility within space and time. While each event carries its own internal time that begins and ends with it, a significant problem arises regarding common time, which allows different events to meet and interact. This concept bridges theoretical ontology and astrophysical cosmology, suggesting that reality is not founded on static entities but on dynamic, secondary reactions between primordial events that establish a shared temporal framework.