GMT (Greenwich Mean Time)

Greenwich Mean Time (GMT) is a time standard that originates from the location of the Royal Observatory in Greenwich, London. It serves as a reference point for timekeeping across the world. GMT measures time based on the Earth's rotation relative to the Sun, providing a consistent baseline from which time zones are calculated. Many countries and organizations use GMT to coordinate activities, especially in fields like aviation, navigation, and computing. Today, GMT has largely been replaced by Coordinated Universal Time (UTC), but the two are often used interchangeably in casual contexts.