+GMT, or Greenwich Mean Time, marks the solar [Time](/wiki/time) at the Royal Observatory in Greenwich, London. It served historically as a global standard for civil time, anchored by the [Prime Meridian](/wiki/prime_meridian) passing through that point.
+## See also
+- [UTC](/wiki/utc)
+- [Time Zone](/wiki/time_zone)
+- [Meridian](/wiki/meridian)
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