Universal Time Coordinated (UTC) is the primary time standard by which the world regulates clocks and time. It is not affected by time zones or Daylight Saving Time, making it a consistent reference point for timekeeping globally. UTC is based on atomic time and is closely related to Greenwich Mean Time (GMT), which was historically used for navigation and timekeeping. UTC is essential for various applications, including aviation, computing, and telecommunications, where precise timing is crucial. It serves as the foundation for time zones around the world, allowing for synchronization of activities and schedules across different regions.