현재 GMT 시간

현재 Unix 타임스탬프가 있는 실시간 GMT 시계. GMT는 UTC+00:00에 있으며 실용적으로는 UTC와 같습니다.

What is GMT?

GMT (Greenwich Mean Time) is the timezone at zero UTC offset, historically defined by the mean solar time at the Royal Observatory in Greenwich, London. It has been used as the international time standard since 1884 and is the basis for UTC.

When GMT differs from UTC

In strict astronomical terms, GMT can vary from UTC by up to 0.9 seconds because Earth's rotation is not perfectly uniform. UTC corrects for this with occasional leap seconds. In practice, software and networking always use UTC — GMT remains in everyday language and HTTP headers.