Cosmic time refers to the concept of time on a cosmic scale, encompassing the entire history and evolution of the universe from the Big Bang to the present day. Researchers studying cosmic time seek to understand the chronology of major events in the universe, such as the formation of galaxies, stars, and planets, as well as the expansion and acceleration of the universe. In addition, researchers in this area often explore questions related to the age of the universe, the nature of dark energy and dark matter, and the ultimate fate of the cosmos. Cosmic time is a fundamental component of cosmology, the study of the origin, structure, and evolution of the universe, and plays a crucial role in shaping our understanding of the physical laws that govern the universe.