Universal Time (UT) is a time standard that serves as a basis for civil timekeeping worldwide. It is closely related to the rotation of the Earth and is often used in astronomy and navigation. The most common form, Coordinated Universal Time (UTC), is adjusted with leap seconds to account for variations in the Earth's rotation. UT is divided into several variations, including UT1, which reflects the Earth's actual rotation, and UT2, which accounts for seasonal variations. These time standards help synchronize clocks and schedules across different regions, ensuring consistency in global communication and travel.