The nature of this name is one of the abandoned chapters in the written works of theoretical mysticism. Although” Ibn Arabi “ and the early commentators of his school left short lines introducing this name in their epistemological heritage, but the attention to the detailed nature of this name and understanding its place from the perspective of ontology, in scientific circles and mystical works, especially in The contemporary period has not been considered. In mysticism, the name Dahr is an answer to the cause of all progress and delay in the entire universe And with a pure monotheistic view, she does not attribute this being before and after only to the inherent properties of objects, but also attributes it to the rulings of one of the divine names called Dahr. Therefore, this article aims to analyze in detail the nature of this name of God and its position in the mystical ontology as the spirit of time with an analytical method based on the words of the predecessors. And to determine the effects of this name of God in the order of religions and compilation of human historical periods , and to specify the exact epistemic boundaries of this name with concepts such as the will of God and "the name of Moghadder".